EP0667200B1 - Herstellung von Reinstmetallpulver aus Metallalkoxiden - Google Patents
Herstellung von Reinstmetallpulver aus Metallalkoxiden Download PDFInfo
- Publication number
- EP0667200B1 EP0667200B1 EP95101419A EP95101419A EP0667200B1 EP 0667200 B1 EP0667200 B1 EP 0667200B1 EP 95101419 A EP95101419 A EP 95101419A EP 95101419 A EP95101419 A EP 95101419A EP 0667200 B1 EP0667200 B1 EP 0667200B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tungsten
- alkoxide
- metal
- tantalum
- methoxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 28
- 239000002184 metal Substances 0.000 title claims abstract description 28
- 150000004703 alkoxides Chemical class 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 title claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 10
- LVNAMAOHFNPWJB-UHFFFAOYSA-N methanol;tantalum Chemical compound [Ta].OC.OC.OC.OC.OC LVNAMAOHFNPWJB-UHFFFAOYSA-N 0.000 claims abstract description 5
- NTWWZVDCSZOPGW-UHFFFAOYSA-N CO[W](OC)(OC)OC Chemical compound CO[W](OC)(OC)OC NTWWZVDCSZOPGW-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012159 carrier gas Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 23
- -1 alkoxide compounds Chemical class 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 150000004704 methoxides Chemical class 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- 239000011651 chromium Substances 0.000 abstract description 4
- NGCRLFIYVFOUMZ-UHFFFAOYSA-N 2,3-dichloroquinoxaline-6-carbonyl chloride Chemical compound N1=C(Cl)C(Cl)=NC2=CC(C(=O)Cl)=CC=C21 NGCRLFIYVFOUMZ-UHFFFAOYSA-N 0.000 abstract description 2
- OIIGPGKGVNSPBV-UHFFFAOYSA-N [W+4].CC[O-].CC[O-].CC[O-].CC[O-] Chemical compound [W+4].CC[O-].CC[O-].CC[O-].CC[O-] OIIGPGKGVNSPBV-UHFFFAOYSA-N 0.000 abstract description 2
- IJCCNPITMWRYRC-UHFFFAOYSA-N methanolate;niobium(5+) Chemical compound [Nb+5].[O-]C.[O-]C.[O-]C.[O-]C.[O-]C IJCCNPITMWRYRC-UHFFFAOYSA-N 0.000 abstract description 2
- ZTILUDNICMILKJ-UHFFFAOYSA-N niobium(v) ethoxide Chemical compound CCO[Nb](OCC)(OCC)(OCC)OCC ZTILUDNICMILKJ-UHFFFAOYSA-N 0.000 abstract description 2
- SDTMFDGELKWGFT-UHFFFAOYSA-N 2-methylpropan-2-olate Chemical compound CC(C)(C)[O-] SDTMFDGELKWGFT-UHFFFAOYSA-N 0.000 abstract 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 229910052756 noble gas Inorganic materials 0.000 abstract 1
- 150000002835 noble gases Chemical class 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 12
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 10
- 239000010936 titanium Substances 0.000 description 10
- 229910052721 tungsten Inorganic materials 0.000 description 10
- 239000010937 tungsten Substances 0.000 description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 239000010955 niobium Substances 0.000 description 7
- 229910052715 tantalum Inorganic materials 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 6
- 238000001036 glow-discharge mass spectrometry Methods 0.000 description 5
- 229910052758 niobium Inorganic materials 0.000 description 5
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000012495 reaction gas Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052776 Thorium Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000000921 elemental analysis Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 229910001510 metal chloride Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000000859 sublimation Methods 0.000 description 2
- 230000008022 sublimation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 description 2
- NXHILIPIEUBEPD-UHFFFAOYSA-H tungsten hexafluoride Chemical compound F[W](F)(F)(F)(F)F NXHILIPIEUBEPD-UHFFFAOYSA-H 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- ITQGMAPLESXWPA-UHFFFAOYSA-N [W+6].C[N-]C.C[N-]C.C[N-]C.C[N-]C.C[N-]C.C[N-]C Chemical compound [W+6].C[N-]C.C[N-]C.C[N-]C.C[N-]C.C[N-]C.C[N-]C ITQGMAPLESXWPA-UHFFFAOYSA-N 0.000 description 1
- BCXDNCKWFAAAII-UHFFFAOYSA-N [W+6].[O-]C.[O-]C.[O-]C.[O-]C.[O-]C.[O-]C Chemical compound [W+6].[O-]C.[O-]C.[O-]C.[O-]C.[O-]C.[O-]C BCXDNCKWFAAAII-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- ZOYJRCIORIVXKU-UHFFFAOYSA-N chromium(3+);2-methylpropan-2-olate Chemical compound [Cr+3].CC(C)(C)[O-].CC(C)(C)[O-].CC(C)(C)[O-] ZOYJRCIORIVXKU-UHFFFAOYSA-N 0.000 description 1
- DYDHOQSULGBQQU-UHFFFAOYSA-N chromium(4+) 2-methylpropan-2-olate Chemical compound [Cr+4].CC(C)(C)[O-].CC(C)(C)[O-].CC(C)(C)[O-].CC(C)(C)[O-] DYDHOQSULGBQQU-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 238000007700 distillative separation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000001640 fractional crystallisation Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000006198 methoxylation reaction Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000005477 sputtering target Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- NLLZTRMHNHVXJJ-UHFFFAOYSA-J titanium tetraiodide Chemical group I[Ti](I)(I)I NLLZTRMHNHVXJJ-UHFFFAOYSA-J 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/24—Obtaining niobium or tantalum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/28—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from gaseous metal compounds
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/36—Obtaining tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2201/00—Treatment under specific atmosphere
- B22F2201/01—Reducing atmosphere
- B22F2201/013—Hydrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2203/00—Controlling
- B22F2203/11—Controlling temperature, temperature profile
Definitions
- the present invention relates to a method for producing high-purity Metal powder.
- the microfabrication of highly integrated electronic components always poses higher requirements for the purity of the interconnect metals, e.g. Titanium, Niobium, tantalum, molybdenum or tungsten.
- the radioactive elements Thorium and uranium, as ⁇ -emitters can have serious consequences in highly integrated applications Cause memory chips.
- Ion exchange resins are used, as in Metallurgy of the Rarer Metals, Volume 6, Tantalum and Niobium, page 129-133.
- Tungsten hexafluoride Distillative separation via the metal halides, e.g. Tungsten hexafluoride in principle also possible.
- This method is the subject of JP-A 02 30,706.
- Tungsten hexafluoride is converted to tungsten powder with hydrogen at 650-1400 ° C reduced, which is suitable for the production of sputtering targets.
- Disadvantage of this The process is that in the reduction with hydrogen, a large amount of hydrogen fluoride attack.
- the object of this invention was therefore to provide a process for the production of to provide high purity metal powder which is simple and can be carried out inexpensively. This problem is solved by Implementation of volatile, i.e. sublimable or distillable, Metal alkoxides with a reaction gas.
- This method is the subject of this invention.
- the metal alkoxide compounds which are used according to the invention have the general formula M (OR) x , where M is a metal from Group 3-14 (according to IUPAC 1985), R is an alkyl, aryl, cycloalkyl or aralkyl radical and M (OR ) x is a sublimable or distillable compound.
- M is a metal from Group 3-14 (according to IUPAC 1985)
- R is an alkyl, aryl, cycloalkyl or aralkyl radical
- M (OR ) x is a sublimable or distillable compound.
- some alkoxide compounds that are suitable according to the invention are listed as examples.
- Metal alkoxide boiling point Aluminum isopropylate 128 ° C / 5 mbar Chromium (IV) tert-butoxide 66 ° C / 3.6 mbar Gallium ethylate 185 ° C / 0.7 mbar Niobium methylate 153 ° C / 0.13 mbar Niobium ethylate 156 ° C / 0.07 mbar Tantalum methylate 130 ° C / 0.3 mbar Tantalum ethylate 146 ° C / 0.2 mbar Titanium ethylate 104 ° C / 1.3 mbar Tungsten methylate 90 ° C / 0.5 mbar
- the reaction gas in the reaction according to the invention is preferably hydrogen.
- the reaction gas can also be mixed with an inert carrier gas, in particular argon be diluted.
- the method according to the invention is preferably at a temperature between 400 ° C and 1400 ° C carried out.
- the most preferred reaction temperature lies between 600 ° C and 1200 ° C.
- WF 6 is converted into W (OCH 3 ) 6 in an equilibrium reaction with volatile Si (OCH 3 ) 4 as ligand transfer agent.
- OCH 3 volatile Si
- Complete methoxylation is only possible by treating the partially fluorinated product with a methanolic NaOCH 3 solution.
- Suitable reactors for carrying out the process according to the invention can Furnaces with an adjustable atmosphere or gas phase reactors. Since the metal alkoxide compounds according to the invention all in a simple manner in the gas phase to be brought is also a gas phase reactor according to DE-A 4 214 720 suitable. The choice of reactor is determined by the particular requirements regarding fine particle size and particle size distribution of the metal powder.
- a 0.5 molar solution of LiCl in methanol was electrolysed under argon protective gas in a flat ground reaction vessel which was provided with a steel cathode, an anode made of tungsten and a reflux condenser. It was electrolyzed with direct current and a current density of 200 mA / cm 2 . The electrolyte solution turned yellow-orange and began to boil shortly after the start of electrolysis.
- a solution of 50 g of NH 4 Cl in 2000 ml of methanol was electrolysed under argon protective gas in a flat-ended reaction vessel which was provided with a steel cathode, an anode made of tantalum and a reflux condenser. It was electrolyzed with direct current and a current density of 200 mA / cm 2 .
- the electrolytic solution turned yellowish and began to boil shortly after the start of the electrolysis.
- Electrochemically produced tungsten ethoxide is purified by sublimation in a glass apparatus and then reacted with hydrogen in a tube furnace at 1000 ° C., equation (2).
- the tungsten metal powder was analyzed for impurities using GDMS (glow-discharge mass spectroscopy). Analysis of the tungsten metal powder, values in ppm.
- Al 1 B ⁇ 0.05 Ba 0.09 Bi ⁇ 0.02 Approx 0.34 CD ⁇ 0.05 Co 0.08 Cr 0.26 Cu 0.06 Fe 0.31 K ⁇ 0.05 Mg 5 Mn 0.015 Mon 6 N / A 0.2 Ni 0.12 P 0.19 Pb 0.03 Sb ⁇ 0.05 Si 9 Sn ⁇ 0.05 Sr. ⁇ 0.02 Th ⁇ 0.0005 Ti 0.48 U ⁇ 0.0005 V ⁇ 0.02 Zn ⁇ 0.02 Zr ⁇ 0.05
- Electrochemically produced tantalum methoxide is purified by distillation at 130 ° C. in a vacuum (0.3 mbar) in a glass apparatus and then reacted with hydrogen in a tube furnace at 1000 ° C., equation (3).
- Ta (OCH 3 ) 5 + 21 ⁇ 2 H 2 ⁇ Ta + 5 CH 3 OH The tantalum metal powder was analyzed for impurities using GDMS (glow-discharge mass spectroscopy). Analysis of the tantalum metal powder, values in ppm.
- Electrochemically produced titanium ethoxide is purified by distillation at 104 ° C. in a vacuum (0.3 mbar) in a glass apparatus and then reacted with hydrogen in a tube furnace at 1000 ° C., equation (4).
- the titanium metal powder was analyzed for impurities using GDMS (glow-discharge mass sprectroscopy). Analysis of the titanium metal powder, values in ppm.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Carbon And Carbon Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
| Metallalkoxid | Siedepunkt |
| Aluminiumisopropylat | 128°C/5 mbar |
| Chrom(IV)-tert.-butylat | 66°C/3,6 mbar |
| Galliumethylat | 185°C/0,7 mbar |
| Niobmethylat | 153°C/0,13 mbar |
| Niobethylat | 156°C/0,07 mbar |
| Tantalmethylat | 130°C/0,3 mbar |
| Tantalethylat | 146°C/0,2 mbar |
| Titanethylat | 104°C/1,3 mbar |
| Wolframmethylat | 90°C/0,5 mbar |
| Analyse des Wolframmetallpulvers, Werte in ppm. | |||||||||
| Al | 1 | B | <0,05 | Ba | 0,09 | Bi | <0,02 | Ca | 0,34 |
| Cd | <0,05 | Co | 0,08 | Cr | 0,26 | Cu | 0,06 | Fe | 0,31 |
| K | <0,05 | Mg | 5 | Mn | 0,015 | Mo | 6 | Na | 0,2 |
| Ni | 0,12 | P | 0,19 | Pb | 0,03 | Sb | <0,05 | Si | 9 |
| Sn | <0,05 | Sr | <0,02 | Th | <0,0005 | Ti | 0,48 | U | <0,0005 |
| V | <0,02 | Zn | <0,02 | Zr | <0,05 |
| Analyse des Tantalmetallpulvers, Werte in ppm. | |||||||||
| Al | 0,5 | B | <0,05 | Ba | 0,09 | Bi | <0,02 | Ca | 0,4 |
| Cd | <0,05 | Co | 0,05 | Cr | 0,04 | Cu | 0,06 | Fe | 0,2 |
| K | <0,05 | Mg | 3 | Mn | 0,015 | Mo | 0,9 | Na | 0,4 |
| Nb | 8 | Ni | 0,15 | P | 0,1 | Pb | 0,03 | Sb | <0,05 |
| Si | 7 | Sn | <0,05 | Sr | <0,02 | Th | <0,0005 | Ti | 0,6 |
| U | <0,0005 | V | <0,02 | Zn | <0,02 | Zr | <0,05 |
| Analyse des Titanmetallpulvers, Werte in ppm. | |||||||||
| Al | 2 | B | <0,05 | Ba | 0,5 | Bi | <0,02 | Ca | 0,2 |
| Cd | <0,05 | Co | 0,25 | Cr | 0,15 | Cu | 0,06 | Fe | 0,4 |
| K | <0,05 | Mg | 3 | Mn | 0,01 | Mo | 0,4 | Na | 0,3 |
| Nb | 0,25 | Ni | 0,15 | P | 0,2 | Pb | 0,02 | Sb | <0,05 |
| Si | 6,5 | Sn | <0,05 | Sr | <0,02 | Th | <0,000 5 | U | <0,0005 |
| V | <0,02 | Zn | <0,02 | Zr | 6 |
Claims (8)
- Verfahren zur Herstellung von hochreinem Metallpulver, dadurch gekennzeichnet, daß die Herstellung durch Reaktion einer oder von mehreren flüchtigen Metallalkoxidverbindungen mit einem Reduktionsgas erfolgt.
- Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, daß als Reduktionsgas Wasserstoff eingesetzt wird.
- Verfahren gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß das Reduktionsgas mit einem inerten Trägergas aus der Gruppe der Edelgase verdünnt ist.
- Verfahren gemäß Anspruch 3, dadurch gekennzeichnet, daß das Trägergas Argon ist.
- Verfahren gemäß einem oder mehreren der Ansrüche 1 bis 4, dadurch gekennzeichnet, daß das Metallalkoxid ein Alkoxid eines Elementes der Gruppe 3 bis 14 des Periodensystems der Elemente ist.
- Verfahren gemäß einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Alkoxidverbindungen bevorzugt Methoxide sind.
- Verfahren gemäß einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Alkoxidverbindung Wolframmethoxid und/oder Tantalmethoxid sind.
- Verfahren gemäß einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Reaktion bei einer Temperatur zwischen 400°C und 1400°C, besonders bevorzugt zwischen 600°C und 1200°C, durchgeführt werden.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4404747A DE4404747C2 (de) | 1994-02-15 | 1994-02-15 | Herstellung von Reinstmetallpulver aus Metallalkoxiden |
| DE4404747 | 1994-02-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0667200A1 EP0667200A1 (de) | 1995-08-16 |
| EP0667200B1 true EP0667200B1 (de) | 1998-08-26 |
Family
ID=6510268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95101419A Expired - Lifetime EP0667200B1 (de) | 1994-02-15 | 1995-02-02 | Herstellung von Reinstmetallpulver aus Metallalkoxiden |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5711783A (de) |
| EP (1) | EP0667200B1 (de) |
| JP (1) | JPH07252511A (de) |
| KR (1) | KR950031331A (de) |
| CN (1) | CN1112467A (de) |
| AT (1) | ATE170116T1 (de) |
| CA (1) | CA2142254A1 (de) |
| DE (2) | DE4404747C2 (de) |
| IL (1) | IL112620A (de) |
| RU (1) | RU2126735C1 (de) |
| TW (1) | TW257706B (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10231777A1 (de) * | 2002-07-13 | 2004-02-05 | Diehl Munitionssysteme Gmbh & Co. Kg | Verfahren zur Herstellung eines Wolfram-Basismaterials und Verwendung desselben |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6100415A (en) * | 1998-03-16 | 2000-08-08 | Japan Pionics Co., Ltd. | Purified alkoxide and process for purifying crude alkoxide |
| WO2000067936A1 (en) * | 1998-05-06 | 2000-11-16 | H.C. Starck, Inc. | Metal powders produced by the reduction of the oxides with gaseous magnesium |
| US5997612A (en) * | 1998-07-24 | 1999-12-07 | The Boc Group, Inc. | Pressure swing adsorption process and apparatus |
| RU2164194C2 (ru) * | 1999-05-11 | 2001-03-20 | Институт химии и технологии редких элементов и минерального сырья им. И.В. Тананаева Кольского научного центра РАН | Способ получения порошка вентильного металла |
| US6375704B1 (en) * | 1999-05-12 | 2002-04-23 | Cabot Corporation | High capacitance niobium powders and electrolytic capacitor anodes |
| DE10030387A1 (de) * | 2000-06-21 | 2002-01-03 | Starck H C Gmbh Co Kg | Kondensatorpulver |
| RU2170647C1 (ru) * | 2000-11-02 | 2001-07-20 | Закрытое акционерное общество "ИНВЕСТ-Технологии" | Способ получения ультрадисперсного металлического порошка |
| US7187396B2 (en) | 2003-11-07 | 2007-03-06 | Engelhard Corporation | Low visibility laser marking additive |
| CN1954042B (zh) | 2004-09-23 | 2011-03-23 | 六号元素(控股)公司 | 多晶磨料及其制备方法 |
| US7399335B2 (en) * | 2005-03-22 | 2008-07-15 | H.C. Starck Inc. | Method of preparing primary refractory metal |
| US7758668B1 (en) | 2006-04-18 | 2010-07-20 | Chemnano, Inc. | Process of manufacturing metallic nano-scale powders |
| RU2413011C1 (ru) * | 2009-12-01 | 2011-02-27 | Государственное образовательное учреждение высшего профессионального образования "Ангарская государственная техническая академия" (ГОУ ВПО "АГТА") | Плазмохимический реактор для обработки минеральных руд |
| RU2410446C1 (ru) * | 2009-12-01 | 2011-01-27 | Государственное образовательное учреждение высшего профессионального образования Ангарская государственная техническая академия (ГОУВПО АГТА) | Способ обработки минеральных руд |
| US9856569B2 (en) * | 2012-07-03 | 2018-01-02 | Field Upgrading Limited | Apparatus and method of producing metal in a nasicon electrolytic cell |
| CN109396456B (zh) * | 2018-12-28 | 2024-02-13 | 西安赛隆金属材料有限责任公司 | 一种球形钨粉末的制备装置及方法 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3117833A (en) * | 1958-09-25 | 1964-01-14 | Fansteel Metallurgical Corp | Process of purifying and separating columbium and tantalum values from each other |
| US3640093A (en) * | 1969-03-10 | 1972-02-08 | Owens Illinois Inc | Process of converting metalorganic compounds and high purity products obtained therefrom |
| GB1307581A (en) * | 1970-05-05 | 1973-02-21 | Monsanto Chemicals | Production of alkoxides |
| JPS5785943A (en) * | 1980-11-18 | 1982-05-28 | Nishimura Watanabe Chiyuushiyutsu Kenkyusho:Kk | Recovering method for metal from fluorine compound |
| EP0197271B1 (de) * | 1985-03-04 | 1989-04-19 | Kabushiki Kaisha Toshiba | Verfahren zur Herstellung hochreiner Molybdän- oder Wolframpulver in Form ihrer Metalle oder Oxide |
| US4582696A (en) * | 1985-04-15 | 1986-04-15 | Ford Motor Company | Method of making a special purity silicon nitride powder |
| US4615736A (en) * | 1985-05-01 | 1986-10-07 | Allied Corporation | Preparation of metal powders |
| US4755369A (en) * | 1985-05-22 | 1988-07-05 | Research Development Corporation Of Japan | Production of ultrafine particles |
| JPS61275108A (ja) * | 1985-05-30 | 1986-12-05 | Mitsubishi Mining & Cement Co Ltd | 誘電体粉末の製造方法 |
| JPS63184306A (ja) * | 1986-09-22 | 1988-07-29 | Mitsui Toatsu Chem Inc | 強磁性金属粉末の安定化方法 |
| JPH0230706A (ja) * | 1988-07-19 | 1990-02-01 | Central Glass Co Ltd | β−タングステン粉末の製造法 |
| US5455223A (en) * | 1993-02-24 | 1995-10-03 | American Superconductor Corporation | Coated precursor powder for oxide superdonductors |
-
1994
- 1994-02-15 DE DE4404747A patent/DE4404747C2/de not_active Expired - Fee Related
-
1995
- 1995-01-16 TW TW084100320A patent/TW257706B/zh active
- 1995-02-02 DE DE59503295T patent/DE59503295D1/de not_active Expired - Fee Related
- 1995-02-02 AT AT95101419T patent/ATE170116T1/de not_active IP Right Cessation
- 1995-02-02 EP EP95101419A patent/EP0667200B1/de not_active Expired - Lifetime
- 1995-02-10 JP JP7045098A patent/JPH07252511A/ja active Pending
- 1995-02-10 CA CA002142254A patent/CA2142254A1/en not_active Abandoned
- 1995-02-13 IL IL112620A patent/IL112620A/xx not_active IP Right Cessation
- 1995-02-14 KR KR1019950002665A patent/KR950031331A/ko not_active Ceased
- 1995-02-15 RU RU95101844A patent/RU2126735C1/ru active
- 1995-02-15 CN CN95101889A patent/CN1112467A/zh active Pending
-
1996
- 1996-07-11 US US08/678,095 patent/US5711783A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10231777A1 (de) * | 2002-07-13 | 2004-02-05 | Diehl Munitionssysteme Gmbh & Co. Kg | Verfahren zur Herstellung eines Wolfram-Basismaterials und Verwendung desselben |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07252511A (ja) | 1995-10-03 |
| TW257706B (de) | 1995-09-21 |
| US5711783A (en) | 1998-01-27 |
| EP0667200A1 (de) | 1995-08-16 |
| ATE170116T1 (de) | 1998-09-15 |
| DE59503295D1 (de) | 1998-10-01 |
| IL112620A (en) | 1997-09-30 |
| CA2142254A1 (en) | 1995-08-16 |
| CN1112467A (zh) | 1995-11-29 |
| RU2126735C1 (ru) | 1999-02-27 |
| KR950031331A (ko) | 1995-12-18 |
| DE4404747A1 (de) | 1995-08-17 |
| IL112620A0 (en) | 1995-05-26 |
| RU95101844A (ru) | 1997-03-10 |
| DE4404747C2 (de) | 1995-12-14 |
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