JPH06176636A - Manufacture of bi oxide superconductor - Google Patents
Manufacture of bi oxide superconductorInfo
- Publication number
- JPH06176636A JPH06176636A JP4325629A JP32562992A JPH06176636A JP H06176636 A JPH06176636 A JP H06176636A JP 4325629 A JP4325629 A JP 4325629A JP 32562992 A JP32562992 A JP 32562992A JP H06176636 A JPH06176636 A JP H06176636A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- phase
- manufacture
- mixed
- oxide superconductor
- 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.)
- Withdrawn
Links
- 239000002887 superconductor Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 50
- 239000002245 particle Substances 0.000 claims description 11
- 239000011812 mixed powder Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229910004247 CaCu Inorganic materials 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 229910052712 strontium Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910002480 Cu-O Inorganic materials 0.000 claims description 2
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- 229910052745 lead Inorganic materials 0.000 claims description 2
- 239000004482 other powder Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 6
- 238000005096 rolling process Methods 0.000 abstract description 4
- 238000005491 wire drawing Methods 0.000 abstract description 4
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N CuO Inorganic materials [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 abstract 1
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Inorganic materials [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 25
- 238000000034 method Methods 0.000 description 12
- 238000002156 mixing Methods 0.000 description 12
- 238000010304 firing Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- -1 (S r Substances 0.000 description 1
- 229910015901 Bi-Sr-Ca-Cu-O Inorganic materials 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は超電導体の製造方法に係
り、特に超電導特性の優れたＢｉ系酸化物超電導体の製
造方法の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a superconductor, and more particularly to improvement of a method for producing a Bi-based oxide superconductor having excellent superconducting properties.
【０００２】[0002]
【従来の技術】Ｂｉ−Ｓｒ−Ｃａ−Ｃｕ−Ｏ系（Ｂｉ
系）の超電導体は、その臨界温度（Ｔｃ）が高く、Ｙ−
Ｂａ−Ｃｕ−Ｏ系（Ｙ系）の超電導体に比較して安定性
および加工性に優れるため、酸化物超電導体の実用材料
として期待されている。このＢｉ系の超電導体には、そ
の組成により３種のＴｃを有する相が存在するが、特に
８０Ｋ級の（２２１２）相（Ｂｉ：Ｓｒ：Ｃａ：Ｃｕの
モル比＝２：２：１：２、以下同じ）と、１１０Ｋ級の
（２２２３）相（Ｂｉ：Ｓｒ：Ｃａ：Ｃｕのモル比＝
２：２：２：３、以下同じ。但し、Ｂｉの一部をＰｂに
置換した組成も含む）は、そのＴｃが液体窒素温度より
高く、かつ機械的な圧縮加工等により結晶粒の方向が制
御し得る点から長尺の線材等の製造に適した材料といえ
る。2. Description of the Related Art Bi-Sr-Ca-Cu-O system (Bi
System) has a high critical temperature (Tc), Y-
It is expected to be a practical material for oxide superconductors because it is superior in stability and workability to Ba—Cu—O (Y) superconductors. In this Bi-based superconductor, there are phases having three kinds of Tc depending on the composition, and in particular, an 80K-class (2212) phase (Bi: Sr: Ca: Cu molar ratio = 2: 2: 1: 2 and the same below) and 110K class (2223) phase (Bi: Sr: Ca: Cu molar ratio =
2: 2: 2: 3, and so on. However, a composition in which a part of Bi is replaced with Pb) has a Tc higher than the liquid nitrogen temperature, and the direction of crystal grains can be controlled by mechanical compression processing or the like. It can be said to be a material suitable for manufacturing.
【０００３】長尺の線材を製造する方法の一つとして、
金属シース法が知られており、この方法は、原料粉末を
金属管中に充填し、これに線引加工や圧延加工等の減面
加工を施した後、焼結することにより内部の原料粉末を
超電導体に成長させて超電導線を製造するもので、金属
管で被覆されているために非常に加工が容易である上、
板状組織を有するＢｉ系の超電導体は、上記の減面加工
により結晶面が同方向に揃い結晶の配向性が向上するた
め、高い臨界電流密度（Ｊｃ）を有する線材が得られ
る。As one of the methods for producing a long wire,
The metal sheath method is known. In this method, the raw material powder is filled in a metal tube, subjected to surface-reduction processing such as wire drawing or rolling, and then sintered to sinter the raw material powder inside. Is a superconducting wire produced by growing a superconducting material, which is very easy to process because it is covered with a metal tube.
In the Bi-based superconductor having a plate-like structure, the crystal planes are aligned in the same direction and the crystal orientation is improved by the above-described surface-reduction processing, and thus a wire having a high critical current density (Jc) can be obtained.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
（２２２３）相はこれを単相で得ることが困難で、その
構成元素のモル比を化学量論組成に配合して焼成する
と、不純物相を同時に生成してその特性が低下するとい
う問題がある。本発明は上記の問題を解決するためにな
されたもので、（２２２３）相の生成量を増加させると
同時に不純物相の生成を減少させ、特性の優れたＢｉ系
の酸化物超電導体を製造する方法を提供することをその
目的とする。However, it is difficult to obtain the above (2223) phase as a single phase, and if the molar ratio of its constituent elements is mixed in a stoichiometric composition and fired, the impurity phase is formed. There is a problem that they are generated at the same time and their characteristics deteriorate. The present invention has been made to solve the above problems, and increases the production amount of the (2223) phase and at the same time reduces the production of the impurity phase to produce a Bi-based oxide superconductor having excellent characteristics. Its purpose is to provide a method.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明のＢｉ系酸化物超電導体の製造方法は、Ｂ
ｉ、Ｐｂ、Ｓｒ、ＣａまたはＣｕからなる各金属元素の
１種以上を含む複数の化合物粉末を、（Ｂｉ＋Ｐｂ）：
Ｓｒ：Ｃａ：Ｃｕ＝２：２：２：３の概略モル比に混合
し、この混合粉末を成型した後、熱処理を施して酸化物
超電導体を製造する際に、混合粉末として（イ）Ｂｉ2
Ｓｒ2 ＣａＣｕ2 Ｏy 粉末を主成分とし、これに（ロ）
Ｃａ2 ＰｂＯ4 粉末、および（ハ）（Ｓｒ、Ｃａ）−Ｃ
ｕ−Ｏ系粉末、ＣａＣｕ2 Ｏ3 粉末またはＣｕＯ粉末の
いずれか１種以上の粉末を添加した混合物を用いるもの
である。In order to achieve the above object, the method for producing a Bi-based oxide superconductor according to the present invention comprises:
(Bi + Pb): a plurality of compound powders containing at least one metal element of i, Pb, Sr, Ca, or Cu.
Sr: Ca: Cu = 2: 2: 2: 3 is mixed at an approximate molar ratio, the mixed powder is molded, and then heat treated to produce an oxide superconductor. 2
Sr 2 CaCu 2 O y powder as the main component,
Ca 2 PbO 4 powder, and (C) (Sr, Ca) -C
A mixture obtained by adding one or more kinds of powder of u-O powder, CaCu 2 O 3 powder and CuO powder is used.
【０００６】本発明における出発原料としては、Ｂｉ、
Ｓｒ、Ｃａ、Ｃｕの各金属元素を含む酸化物、炭酸塩、
硝酸塩等の粉末が用いられる。上記の混合粉末中に配合
される（２２１２）相の粉末は、化学量論組成に配合し
たＢｉ、Ｓｒ、Ｃａ、Ｃｕを含む原料粉末を混合した
後、７００〜８８０℃の温度範囲で１０〜２００時間焼
成することにより合成される。これらの化合物粉末とし
ては固相粉の他、溶液から沈降させた共沈粉を用いるこ
ともできる。As the starting material in the present invention, Bi,
Oxides, carbonates containing metal elements of Sr, Ca, Cu,
Powder such as nitrate is used. The powder of the phase (2212) blended in the above mixed powder is 10 to 10 in the temperature range of 700 to 880 ° C. after mixing the raw material powders containing Bi, Sr, Ca and Cu blended in the stoichiometric composition. It is synthesized by firing for 200 hours. As these compound powders, in addition to solid phase powder, coprecipitated powder precipitated from a solution can be used.
【０００７】一方、（２２２３）相の配合に対して、
（２２１２）相の粉末と混合される不足分の粉末として
は、Ｃａ2 ＰｂＯ4 粉末と、さらに（Ｓｒ、Ｃａ）−Ｃ
ｕ−Ｏ系粉末、ＣａＣｕ2 Ｏ3 粉末またはＣｕＯ粉末の
いずれか１種以上の粉末が用いられる。混合方法は、い
ずれの方法を用いてもよいが、混合により粒度の低下を
引き起こさない条件で行うことが好ましい。混合後の粉
末は圧縮成型するか、あるいは金属管中に充填して伸線
加工や圧延加工した後、熱処理を施して焼成する。On the other hand, for the formulation of the (2223) phase,
The shortage powder to be mixed with the (2212) phase powder includes Ca 2 PbO 4 powder and (Sr, Ca) -C.
u-O-based powder, any one or more powders of CaCu 2 O 3 powder or CuO powder is used. Any mixing method may be used, but it is preferable to carry out the mixing under the condition that the particle size is not reduced by mixing. The powder after mixing is compression-molded, or filled in a metal tube and subjected to wire drawing or rolling, followed by heat treatment and firing.
【０００８】以上の混合粉末中の（２２１２）相の粉末
は、０．１〜５０μｍの粒径を有するものを用いること
が好ましい。これは、粒径が０．１μｍ未満であると、
粉末化の破砕時の応力により結晶粒が損傷してその特性
が低下し易く、また、粒径が５０μｍを越えると、混合
粉末中で構成元素の十分な拡散に時間を要し、合成時間
が長くなるためである。The powder of the (2212) phase in the above mixed powder preferably has a particle size of 0.1 to 50 μm. This means that if the particle size is less than 0.1 μm,
The crystal grains are easily damaged by the stress at the time of pulverization and the characteristics are deteriorated. Further, if the grain size exceeds 50 μm, it takes time for the constituent elements to sufficiently diffuse in the mixed powder, and the synthesis time is long. Because it will be long.
【０００９】一方、この（２２１２）相以外の粉末の粒
径βは、０．１〜１０μｍの粒径で、かつ（２２１２）
相粉末の粒径αに対してα＞βの関係を有するものを用
いることが好ましい。これは、α＜βであると（２２１
２）相中への元素の拡散が不十分となり、不純物相が残
存して特性が低下するためである。On the other hand, the particle size β of the powder other than the (2212) phase is 0.1 to 10 μm and (2212)
It is preferable to use one having a relationship of α> β with respect to the particle diameter α of the phase powder. This means that if α <β (221
2) This is because the diffusion of the element into the phase becomes insufficient, the impurity phase remains, and the characteristics deteriorate.
【００１０】[0010]
【作用】本発明の方法においては、混合粉末中に比較的
単相化が容易な（２２１２）相を配合するため、これを
核として容易に（２２２３）相が生成し、不純物相の生
成による特性の低下を防止することができる。また、混
合粉末の粒径を規定することにより、この（２２２３）
相の生成に必要な拡散が容易になる。In the method of the present invention, since the (2212) phase, which is relatively easy to be made into a single phase, is mixed in the mixed powder, the (2223) phase is easily formed with this as a core, and the impurity phase is generated. It is possible to prevent deterioration of characteristics. Also, by defining the particle size of the mixed powder, this (2223)
It facilitates the diffusion needed to create the phase.
【００１１】[0011]
【実施例】以下本発明の実施例および比較例について説
明する。 実施例 Ｂｉ2 Ｏ3 、Ｓｒ（ＮＯ3 ）2 、ＣａＯ、ＣｕＯおよび
ＰｂＯの各粉末を出発原料として、Ｂｉ：Ｓｒ：Ｃａ：
Ｃｕ＝２：１．９：１：２のモル比で配合し、エタノー
ルを用いた湿式混合法により混合した後、大気中で８４
０℃×５０時間の焼成を２回繰り返し、これを破砕して
（２２１２）相粉末を作製した。EXAMPLES Examples and comparative examples of the present invention will be described below. Example Using each powder of Bi 2 O 3 , Sr (NO 3 ) 2 , CaO, CuO and PbO as a starting material, Bi: Sr: Ca:
Cu was mixed at a molar ratio of 2: 1.9: 1.2 and mixed by a wet mixing method using ethanol.
Firing at 0 ° C. for 50 hours was repeated twice, and this was crushed to prepare (2212) phase powder.
【００１２】一方、上記の出発原料をＣａ：Ｐｂ＝２：
１、Ｓｒ：Ｃａ：Ｃｕ＝１：１：１およびＣａ：Ｃｕ＝
１：２のモル比で配合し、エタノールを用いた湿式混合
法により混合した後、酸素雰囲気中で８００℃×２４時
間焼成し、これを破砕してＣａ2 ＰｂＯ4 粉末、（Ｓ
ｒ、Ｃａ）2 ＣｕＯ3 粉末およびＣａＣｕ2 Ｏ3 粉末を
作製した。On the other hand, Ca: Pb = 2:
1, Sr: Ca: Cu = 1: 1: 1 and Ca: Cu =
After blending in a molar ratio of 1: 2 and mixing by a wet mixing method using ethanol, the mixture was calcined in an oxygen atmosphere at 800 ° C. for 24 hours and crushed to obtain Ca 2 PbO 4 powder, (S
r, Ca) 2 CuO 3 powder and CaCu 2 O 3 powder were prepared.
【００１３】このようにして作製した粉末をＢｉ：Ｐ
ｂ：Ｓｒ：Ｃａ：Ｃｕ＝１．８５：０．２５：１．９：
２：３のモル比に配合し、これを混合した後、外径φ
７．０ｍｍ、内径φ５．０ｍｍのＡｇ管中に充填し、次
いで伸線加工および圧延加工を施して厚さ０．１ｍｍ，
幅３ｍｍのテープを製造した。このテープを８３０℃×
１００時間焼成した後、１０ｔ／ｃｍ2 の圧力を１分間
加え、さらに８３０℃×５０時間焼成して超電導テープ
を製造した。尚、このＡｇ管中に充填された（２２１
２）相の粉末の粒径は約５〜１０μｍ、また他の粉末の
粒径は約０．５〜２μｍであつた。The powder produced in this manner was used as Bi: P.
b: Sr: Ca: Cu = 1.85: 0.25: 1.9:
After mixing it in a molar ratio of 2: 3 and mixing it, the outer diameter φ
It was filled in an Ag tube having a diameter of 7.0 mm and an inner diameter of 5.0 mm, and then subjected to wire drawing and rolling to a thickness of 0.1 mm,
A tape having a width of 3 mm was manufactured. This tape 830 ℃ ×
After firing for 100 hours, a pressure of 10 t / cm 2 was applied for 1 minute, and further firing at 830 ° C. for 50 hours to produce a superconducting tape. In addition, it was filled in this Ag tube (221
The particle size of the powder of phase 2) was about 5 to 10 μm, and the particle size of the other powders was about 0.5 to 2 μm.
【００１４】以上のようにして得られた超電導テープの
Ｊｃを測定した結果、７７Ｋで２．５×１０4 Ａ／ｃｍ
2 の値を示した。 比較例 平均粒径約５〜１０μｍのＢｉ2 Ｏ3 ，ＰｂＯ、Ｓｒ
（ＮＯ3 ）2 ，ＣａＯおよびＣｕＯの各粉末を（Ｂｉ＋
Ｐｂ）：Ｓｒ：Ｃａ：Ｃｕ＝２．１：２：２：３のモル
比に配合し、これを混合した後、以下実施例と同様の方
法により超電導テープを製造した。The Jc of the superconducting tape obtained as described above was measured and found to be 2.5 × 10 4 A / cm at 77K.
A value of 2 was shown. Comparative Example Bi 2 O 3 , PbO, Sr with an average particle size of about 5 to 10 μm
Each powder of (NO 3 ) 2 , CaO and CuO was added to (Bi +
Pb): Sr: Ca: Cu = 2.1: 2: 2: 3 in a molar ratio, and after mixing these, a superconducting tape was manufactured by the same method as in the following examples.
【００１５】この超電導テープの臨界電流密度は、７７
Ｋで７．０×１０3 Ａ／ｃｍ2 であった。The critical current density of this superconducting tape is 77
The K value was 7.0 × 10 3 A / cm 2 .
【００１６】[0016]
【発明の効果】以上述べたように本発明の方法によれ
ば、（２２２３）相を構成する各元素を含む化合物の粉
末を混合して成型した後、熱処理を施して酸化物成型体
を製造する方法に比較して、不純物相の生成を抑制する
ことができ、特性の優れたＢｉ系の酸化物超電導体を容
易に製造することができる。As described above, according to the method of the present invention, a powder of a compound containing each element constituting the (2223) phase is mixed and molded, and then heat treated to produce an oxide molded body. Compared with the method described above, generation of an impurity phase can be suppressed, and a Bi-based oxide superconductor having excellent characteristics can be easily manufactured.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０１Ｌ 39/24 ＺＡＡ Ｚ 9276−4Ｍ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location H01L 39/24 ZAA Z 9276-4M
Claims (2)
る各金属元素の１種以上を含む複数の化合物粉末を、
（Ｂｉ＋Ｐｂ）：Ｓｒ：Ｃａ：Ｃｕ＝２：２：２：３の
概略モル比に混合し、この混合粉末を成型した後、熱処
理を施して酸化物超電導体を製造する方法において、前
記混合粉末として（イ）Ｂｉ2 Ｓｒ2 ＣａＣｕ2 Ｏy 粉
末を主成分とし、これに（ロ）Ｃａ2 ＰｂＯ4 粉末、お
よび（ハ）（Ｓｒ，Ｃａ）−Ｃｕ−Ｏ系粉末、ＣａＣｕ
2 Ｏ3 粉末またはＣｕＯ粉末のいずれか１種以上の粉末
を添加した混合物を用いることを特徴とするＢｉ系酸化
物超電導体の製造方法。1. A plurality of compound powders containing at least one metal element of Bi, Pb, Sr, Ca or Cu,
(Bi + Pb): Sr: Ca: Cu = mixed at an approximate molar ratio of 2: 2: 2: 3, molded into the mixed powder, and then heat treated to produce an oxide superconductor. (A) Bi 2 Sr 2 CaCu 2 O y powder as a main component, and (b) Ca 2 PbO 4 powder, and (c) (Sr, Ca) -Cu-O-based powder, CaCu
A method for producing a Bi-based oxide superconductor, which comprises using a mixture containing one or more powders of 2 O 3 powder and CuO powder.
の粉末の粒径αは０．１〜５０μｍの範囲にあり、他の
粉末の粒径βは０．１〜１０μｍの範囲で，かつβ＜α
であることを特徴とする請求項１記載のＢｉ系酸化物超
電導体の製造方法。2. Bi 2 Sr 2 CaCu 2 O y in the mixed powder.
Particle size α of the powder is in the range of 0.1 to 50 μm, particle size β of the other powder is in the range of 0.1 to 10 μm, and β <α
The method for producing a Bi-based oxide superconductor according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4325629A JPH06176636A (en) | 1992-12-04 | 1992-12-04 | Manufacture of bi oxide superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4325629A JPH06176636A (en) | 1992-12-04 | 1992-12-04 | Manufacture of bi oxide superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06176636A true JPH06176636A (en) | 1994-06-24 |
Family
ID=18178993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4325629A Withdrawn JPH06176636A (en) | 1992-12-04 | 1992-12-04 | Manufacture of bi oxide superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06176636A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011302A1 (en) * | 2004-07-29 | 2006-02-02 | Sumitomo Electric Industries, Ltd. | Method for producing superconducting wire |
-
1992
- 1992-12-04 JP JP4325629A patent/JPH06176636A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011302A1 (en) * | 2004-07-29 | 2006-02-02 | Sumitomo Electric Industries, Ltd. | Method for producing superconducting wire |
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