CN106623900A - Aluminum oxide ceramic and preparation method thereof - Google Patents
Aluminum oxide ceramic and preparation method thereof Download PDFInfo
- Publication number
- CN106623900A CN106623900A CN201611178916.1A CN201611178916A CN106623900A CN 106623900 A CN106623900 A CN 106623900A CN 201611178916 A CN201611178916 A CN 201611178916A CN 106623900 A CN106623900 A CN 106623900A
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- CN
- China
- Prior art keywords
- parts
- oxide
- aluminium
- aluminum oxide
- manganese dioxide
- 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.)
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000011224 oxide ceramic Substances 0.000 title abstract 4
- 229910052574 oxide ceramic Inorganic materials 0.000 title abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 32
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims abstract description 31
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 19
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 17
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 16
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000292 calcium oxide Substances 0.000 claims abstract description 16
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 16
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 15
- 239000004323 potassium nitrate Substances 0.000 claims abstract description 15
- 235000010333 potassium nitrate Nutrition 0.000 claims abstract description 15
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000005011 phenolic resin Substances 0.000 claims abstract description 14
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 14
- 229910000480 nickel oxide Inorganic materials 0.000 claims abstract description 13
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims abstract description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 51
- 239000000919 ceramic Substances 0.000 claims description 19
- 239000004411 aluminium Substances 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- 229940088417 precipitated calcium carbonate Drugs 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 235000011837 pasties Nutrition 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005563 spheronization Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010146 3D printing Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- 238000005457 optimization Methods 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- -1 phenolic aldehyde Chemical class 0.000 description 2
- 238000012913 prioritisation Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- 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
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses aluminum oxide ceramic and a preparation method thereof. The aluminum oxide ceramic consists of the following formula components in parts by weight: 6-8 parts of calcium oxide, 6-8 parts of potassium nitrate, 3-5 parts of magnesium oxide, 3-5 parts of nickel oxide, 7-9 parts of silicon dioxide, 10-12 parts of aluminum powder, 6-8 parts of special-grade crude alloys, 2-6 parts of iron trioxide, 4-6 parts of manganese dioxide, 6-8 parts of aluminum oxide, 20-30 parts of phenolic resin and 6-8 parts of light calcium carbonate. The aluminum oxide ceramic improves product quality while reducing energy consumption, and provides an optimization scheme for a 3D printing material for a supporting rod for a loaded soft creep furnace, and the like.
Description
Technical field
The present invention relates to ceramic material field, in particular to a kind of aluminium oxide ceramics and preparation method thereof.
Background technology
In the past, as receiving the light-emitting components such as light emitting diode (LED), the semiconductor laser (LD) of high brightness
Package for light emitting element accommodation (is also only called below packaging body), using the packaging body of ceramics system.
The packaging body of conventional ceramics system possesses the matrix of element mounted and is arranged on matrix and with through hole
Framework.It is provided with matrix for from the outside distribution conductors being powered, light-emitting component to be with the distribution conductors by closing line
Electrical connection.And, light-emitting component is lighted via distribution conductors and closing line by outside energization, and the light that it sends directly is discharged
To outside, or outside is discharged into the inner peripheral surface reflection of the surface of matrix or the through hole of framework.Therefore, the surface of matrix with
And the shape of the through hole inner peripheral surface of framework and composition have a great impact to the luminous efficiency of light-emitting device.
The content of the invention
The invention provides a kind of aluminium oxide ceramics and preparation method thereof, of the invention while energy resource consumption is reduced,
Product quality is improve, is that soft creep stove support stick 3D printing material of lotus etc. provides a prioritization scheme.
For achieving the above object, the present invention provides following technical scheme：
A kind of aluminium oxide ceramics and preparation method thereof, is made up of following mass fraction formula components：Calcium oxide 6-8 parts, nitre
Sour potassium 6-8 parts, magnesia 3-5 parts, nickel oxide 3-5 parts, silica 7-9 parts, aluminium powder 10-12 parts, superfine thick alloy 6-8 parts,
Di-iron trioxide 2-6 parts, manganese dioxide 4-6 parts, aluminum oxide 6-8 parts, phenolic resin 20-30 parts, precipitated calcium carbonate 6-8 parts.
Further：It is made up of following mass fraction formula components：6 parts of calcium oxide, 6 parts of potassium nitrate, 3 parts of magnesia, oxidation
3 parts of nickel, 7 parts of silica, 10 parts of aluminium powder, superfine thick 6 parts of alloy, 2 parts of di-iron trioxide, 4 parts of manganese dioxide, 6 parts of aluminum oxide,
20 parts of phenolic resin, 6 parts of precipitated calcium carbonate.
Further：It is made up of following mass fraction formula components：7 parts of calcium oxide, 7 parts of potassium nitrate, 4 parts of magnesia, oxidation
4 parts of nickel, 8 parts of silica, 11 parts of aluminium powder, superfine thick 7 parts of alloy, 4 parts of di-iron trioxide, 5 parts of manganese dioxide, 7 parts of aluminum oxide,
25 parts of phenolic resin, 7 parts of precipitated calcium carbonate.
Further：It is made up of following mass fraction formula components：8 parts of calcium oxide, 8 parts of potassium nitrate, 5 parts of magnesia, oxidation
5 parts of nickel, 9 parts of silica, 12 parts of aluminium powder, superfine thick 8 parts of alloy, 6 parts of di-iron trioxide, 6 parts of manganese dioxide, 8 parts of aluminum oxide,
30 parts of phenolic resin, 8 parts of precipitated calcium carbonate.
Further：Preparation method comprises the steps：
Step one, calcium oxide, potassium nitrate, magnesia, nickel oxide, silica, aluminium powder are ground respectively so as to grain
Footpath is no more than 60 mesh；
Step 2, the raw material in step one is added into superfine thick alloy, di-iron trioxide, manganese dioxide, aluminum oxide, phenolic aldehyde tree
Fat is mixed and made into pasty state, is granulated using spheronization or extrusion molding, during granulation, is equipped with Jing after nitrification processing in each particle
Cotton thread；
Step 3, step 2 gained is mixed with precipitated calcium carbonate and dried under vacuum, obtain aluminium oxide ceramics.
The invention has the beneficial effects as follows：The present invention improves product quality while energy resource consumption is reduced, and is that lotus is soft
Creep stove support stick provides a prioritization scheme with 3D printing material etc..
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
Embodiment one：
A kind of aluminium oxide ceramics is made up of following mass fraction formula components：Calcium oxide 6-8 parts, potassium nitrate 6-8 parts, oxidation
Magnesium 3-5 parts, nickel oxide 3-5 parts, silica 7-9 parts, aluminium powder 10-12 parts, superfine thick alloy 6-8 parts, di-iron trioxide 2-6
Part, manganese dioxide 4-6 parts, aluminum oxide 6-8 parts, phenolic resin 20-30 parts, precipitated calcium carbonate 6-8 parts.
Embodiment two：
A kind of aluminium oxide ceramics is made up of following mass fraction formula components：6 parts of calcium oxide, 6 parts of potassium nitrate, magnesia 3
Part, 3 parts of nickel oxide, 7 parts of silica, 10 parts of aluminium powder, superfine thick 6 parts of alloy, 2 parts of di-iron trioxide, 4 parts of manganese dioxide, oxygen
Change 6 parts of aluminium, 20 parts of phenolic resin, 6 parts of precipitated calcium carbonate.
Embodiment three：
A kind of aluminium oxide ceramics is made up of following mass fraction formula components：7 parts of calcium oxide, 7 parts of potassium nitrate, magnesia 4
Part, 4 parts of nickel oxide, 8 parts of silica, 11 parts of aluminium powder, superfine thick 7 parts of alloy, 4 parts of di-iron trioxide, 5 parts of manganese dioxide, oxygen
Change 7 parts of aluminium, 25 parts of phenolic resin, 7 parts of precipitated calcium carbonate.
Example IV：
A kind of aluminium oxide ceramics is made up of following mass fraction formula components：8 parts of calcium oxide, 8 parts of potassium nitrate, magnesia 5
Part, 5 parts of nickel oxide, 9 parts of silica, 12 parts of aluminium powder, superfine thick 8 parts of alloy, 6 parts of di-iron trioxide, 6 parts of manganese dioxide, oxygen
Change 8 parts of aluminium, 30 parts of phenolic resin, 8 parts of precipitated calcium carbonate.
Embodiment five：
A kind of preparation method of aluminium oxide ceramics comprises the steps：
Step one, calcium oxide, potassium nitrate, magnesia, nickel oxide, silica, aluminium powder are ground respectively so as to grain
Footpath is no more than 60 mesh；
Step 2, the raw material in step one is added into superfine thick alloy, di-iron trioxide, manganese dioxide, aluminum oxide, phenolic aldehyde tree
Fat is mixed and made into pasty state, is granulated using spheronization or extrusion molding, during granulation, is equipped with Jing after nitrification processing in each particle
Cotton thread；
Step 3, step 2 gained is mixed with precipitated calcium carbonate and dried under vacuum, obtain aluminium oxide ceramics.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity those skilled in the art should
Using specification as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art
Understandable other embodiment.
Claims (5)
1. a kind of aluminium oxide ceramics, it is characterised in that：It is made up of following mass fraction formula components：
Calcium oxide 6-8 parts, potassium nitrate 6-8 parts, magnesia 3-5 parts, nickel oxide 3-5 parts, silica 7-9 parts, aluminium powder 10-12
Part, superfine thick alloy 6-8 parts, di-iron trioxide 2-6 parts, manganese dioxide 4-6 parts, aluminum oxide 6-8 parts, phenolic resin 20-30 parts,
Precipitated calcium carbonate 6-8 parts.
2. a kind of aluminium oxide ceramics according to claim 1, it is characterised in that：By following mass fraction formula components group
Into：
6 parts of calcium oxide, 6 parts of potassium nitrate, 3 parts of magnesia, 3 parts of nickel oxide, 7 parts of silica, 10 parts of aluminium powder, superfine thick alloy 6
Part, 2 parts of di-iron trioxide, 4 parts of manganese dioxide, 6 parts of aluminum oxide, 20 parts of phenolic resin, 6 parts of precipitated calcium carbonate.
3. a kind of aluminium oxide ceramics according to claim 1, it is characterised in that：By following mass fraction formula components group
Into：
7 parts of calcium oxide, 7 parts of potassium nitrate, 4 parts of magnesia, 4 parts of nickel oxide, 8 parts of silica, 11 parts of aluminium powder, superfine thick alloy 7
Part, 4 parts of di-iron trioxide, 5 parts of manganese dioxide, 7 parts of aluminum oxide, 25 parts of phenolic resin, 7 parts of precipitated calcium carbonate.
4. a kind of aluminium oxide ceramics according to claim 1, it is characterised in that：By following mass fraction formula components group
Into：
8 parts of calcium oxide, 8 parts of potassium nitrate, 5 parts of magnesia, 5 parts of nickel oxide, 9 parts of silica, 12 parts of aluminium powder, superfine thick alloy 8
Part, 6 parts of di-iron trioxide, 6 parts of manganese dioxide, 8 parts of aluminum oxide, 30 parts of phenolic resin, 8 parts of precipitated calcium carbonate.
5. a kind of a kind of preparation method of aluminium oxide ceramics according to claim 1, it is characterised in that：Including following step
Suddenly：
Step one, calcium oxide, potassium nitrate, magnesia, nickel oxide, silica, aluminium powder are ground respectively so as to which particle diameter is equal
No more than 60 mesh；
Step 2, the raw material in step one is added superfine thick alloy, di-iron trioxide, manganese dioxide, aluminum oxide, phenolic resin mix
Pasty state is made in conjunction, is granulated using spheronization or extrusion molding, during granulation, the cotton Jing after nitrification processing is equipped with each particle
Line；
Step 3, step 2 gained is mixed with precipitated calcium carbonate and dried under vacuum, obtain aluminium oxide ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611178916.1A CN106623900A (en) | 2016-12-19 | 2016-12-19 | Aluminum oxide ceramic and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611178916.1A CN106623900A (en) | 2016-12-19 | 2016-12-19 | Aluminum oxide ceramic and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106623900A true CN106623900A (en) | 2017-05-10 |
Family
ID=58833656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611178916.1A Withdrawn CN106623900A (en) | 2016-12-19 | 2016-12-19 | Aluminum oxide ceramic and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106623900A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306944A (en) * | 2008-06-24 | 2008-11-19 | 中国铝业股份有限公司 | Green alumina ceramic and method for preparing same |
| CN101759428A (en) * | 2009-04-10 | 2010-06-30 | 宁波大学 | Method for producing aluminium oxide ceramic composition containing novel four-component sintering additive |
| CN102432273A (en) * | 2011-09-21 | 2012-05-02 | 景德镇陶瓷学院 | Method for reducing sintering shrinkage of alumina ceramic material and product prepared by method |
| CN103086702A (en) * | 2011-11-18 | 2013-05-08 | 常熟市创新陶瓷有限公司 | Aluminum oxide ceramic and manufacturing method thereof |
| CN105198407A (en) * | 2015-09-24 | 2015-12-30 | 长沙鼎成新材料科技有限公司 | A kind of preparation method of composite ceramic terminal post for electric power |
| CN105254288A (en) * | 2015-09-28 | 2016-01-20 | 长沙鼎成新材料科技有限公司 | A kind of preparation method of organic composite ceramic terminal post for electric power |
| CN105330498A (en) * | 2015-11-19 | 2016-02-17 | 湖南环宇烟花鞭炮有限公司 | Colorful firework and preparation method thereof |
| US20160280603A1 (en) * | 2013-03-22 | 2016-09-29 | Refractory Intellectual Property Gmbh & Co. Kg | Fire-resistant ceramic mix and fire resistant ceramic product |
-
2016
- 2016-12-19 CN CN201611178916.1A patent/CN106623900A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306944A (en) * | 2008-06-24 | 2008-11-19 | 中国铝业股份有限公司 | Green alumina ceramic and method for preparing same |
| CN101759428A (en) * | 2009-04-10 | 2010-06-30 | 宁波大学 | Method for producing aluminium oxide ceramic composition containing novel four-component sintering additive |
| CN102432273A (en) * | 2011-09-21 | 2012-05-02 | 景德镇陶瓷学院 | Method for reducing sintering shrinkage of alumina ceramic material and product prepared by method |
| CN103086702A (en) * | 2011-11-18 | 2013-05-08 | 常熟市创新陶瓷有限公司 | Aluminum oxide ceramic and manufacturing method thereof |
| US20160280603A1 (en) * | 2013-03-22 | 2016-09-29 | Refractory Intellectual Property Gmbh & Co. Kg | Fire-resistant ceramic mix and fire resistant ceramic product |
| CN105198407A (en) * | 2015-09-24 | 2015-12-30 | 长沙鼎成新材料科技有限公司 | A kind of preparation method of composite ceramic terminal post for electric power |
| CN105254288A (en) * | 2015-09-28 | 2016-01-20 | 长沙鼎成新材料科技有限公司 | A kind of preparation method of organic composite ceramic terminal post for electric power |
| CN105330498A (en) * | 2015-11-19 | 2016-02-17 | 湖南环宇烟花鞭炮有限公司 | Colorful firework and preparation method thereof |
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Application publication date: 20170510 |