CN101250057B - CaO-Al2O3-MgO-ZrO2-SiO2 series aluminum oxide electronic ceramics - Google Patents
CaO-Al2O3-MgO-ZrO2-SiO2 series aluminum oxide electronic ceramics Download PDFInfo
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- CN101250057B CN101250057B CN2007100324369A CN200710032436A CN101250057B CN 101250057 B CN101250057 B CN 101250057B CN 2007100324369 A CN2007100324369 A CN 2007100324369A CN 200710032436 A CN200710032436 A CN 200710032436A CN 101250057 B CN101250057 B CN 101250057B
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- cao
- mgo
- sio
- zro
- electronic ceramics
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- 239000000919 ceramic Substances 0.000 title claims abstract description 28
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 25
- 239000002994 raw material Substances 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 16
- 239000003513 alkali Substances 0.000 abstract description 7
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 238000001465 metallisation Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 2
- 241001391944 Commicarpus scandens Species 0.000 abstract 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 19
- 230000001458 anti-acid effect Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000004018 waxing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000000462 isostatic pressing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses an aluminum oxide electronic ceramic of CaO-AI<2>O<3>-MgO-ZrO<2>-SiO<2> system, which is composed of 93-94 wt% of AI<2>O<3>, 3-4 wt% of SiO<2>, 0.2-0.6 wt% of ZrO<2>, 0.2-0.4 wt% of CaO, 0.8-1 wt% of MgO, 0.2-0.6 wt% of BaO and 0.01-0.05 wt% of Fe<2>O<3>, while the left is foreign material. The invention adds zirconium material into the prior ceramic materials to satisfy the glazing demand of user at expansion factor, grain phase and granularity and eliminate yellow brown spot at metallization sealing process, to improve the pass percentage of metal sealing quality of at least 96%, improve tensile strength and acid and alkali resistant degrees, and improve all quality indexes. The inventive product has better compressive performance, high air tightness, high flexural strength, high acid and alkali resistance, high direct current breakdown strength and non yellow brown spot, which is not easy to break.
Description
Technical field
The present invention relates to electronic ceramics manufacturing technology field, is a kind of CaO-Al specifically
2O
3-MgO-ZrO-SiO
2It is the aluminium sesquioxide electronic ceramics.
Background technology
At present, for the electronic ceramics that switching tube power electronics shell is adopted, all be to adopt Al both at home and abroad
2O
3Porcelain, this is because Al
2O
3The good combination property of porcelain, for example mechanical degree height, good insulation preformance, heat shock resistance is good, matched coefficients of thermal expansion or the like advantage, it is convenient, inexpensive, the manufacturing process simple possible of raw material sources particularly, thereby is a kind of structured material that present vacuum electronic industry purposes is the widest, consumption is maximum, kind is maximum.
Al
2O
3The exploitation of porcelain process many decades, research are still with CaO-Al at present both at home and abroad so that industrialization is quite ripe
2O
3-SiO
2, MgO-Al
2O
3-SiO
2, CaO-Al
2O
3-MgO-SiO
2Three kinds of systems are main body, and the manufacturing process of three kinds of systems is similar, but also difference to some extent of its performance.
CaO-Al
2O
3-SiO
2System is because of containing certain CaO, and the high temperature viscosity of CaO (near metallizing temperature) is lower, and the macroscopic performance is that adaptability is relatively good, thereby many producers all adopt CaO-Al
2O
3-SiO
2System, but relevant practical experience proves: CaO-Al
2O
3-SiO
2The crystal grain of system's pottery is bigger, and the lath-shaped crystal habit is in the majority, burns till the back and forms yellow greyness phenomenon easily, and is very not attractive in appearance.
Thereby to stop that pottery yellow greyness phenomenon occurs and improve ceramic over-all properties be the problem that industry technician will inquire into.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, provide that a kind of good combination property, resistance to air loss height, folding strength height, anti acid alkali performance are strong, dc breakdown intensity height, not easily broken and the electronic ceramics of yellow greyness phenomenon can not occur.
The present invention can be achieved through the following technical solutions:
CaO-Al of the present invention
2O
3-MgO-ZrO
2-SiO
2Be the aluminium sesquioxide electronic ceramics, this electronic ceramics is made up of following each raw material weight per-cent:
Al
2O
3?93～94％ SiO
2 3～4％ ZrO
2?0.2～0.6％
CaO 0.2～0.4％ MgO 0.8～1％ BaO 0.2～0.6％
Fe
2O
30.01～0.05% all the other be impurity.
This is that the aluminium sesquioxide electronic ceramics is made up of following each raw material weight per-cent:
Al
2O
3?94％ SiO
2 4％ ZrO
2 0.3％
CaO 0.2％ MgO?0.8％ BaO 0.5％
Fe
2O
30.02% all the other be impurity.
Its manufacturing process is probably as follows:
1, with raw material A l
2O
3, SiO
2, ZrO
2, CaO, MgO etc. pulverize;
2, add paraffin liquid and join slurry;
3, raw material is joined the slurry aftershaping;
4, carry out the de-waxing operation, the needed temperature of this de-waxing operation is about 1100 ℃;
5, carry out sintering circuit at the twin tunnel kiln, about 1650 ℃ of the required temperature of sintering circuit;
6, processing grinding is modified;
7, finished product packing.
In step 3, this moulding process can adopt isostatic pressing technology or hot die-casting molding technology to carry out moulding, and the above-mentioned type production technique is not described in detail at this for the production technique of existing pottery.
Fe
2O
3Be the incidental natural Fe of each raw material
2O
3, unnecessary this composition of extra interpolation, its content are micro-.
ZrO
2(zirconium dioxide) is a kind of novel toughening ceramic material, and it has characteristics such as wear-resistant, corrosion-resistant, high temperature resistant, has good ion-exchange performance simultaneously, is ideal polyfunctional catalyst and support of the catalyst.
The present invention contains the zirconium ceramic oxide, not only have at the coefficient of expansion, crystalline phase globule size etc. can adapt to user's glazing specification of quality, can eliminate in metallization sealing-in operation especially and yellow greyness phenomenon occur, the up-to-standard rate of metal sealing is increased to more than 96% by original 80%, product tensile strength, antiacid basicity is improved largely, and each quality index all is greatly improved, the manufacturing process of product of the present invention is adapted to the production technique of traditional ceramics product again, that is to say the prescription that under the prerequisite that does not change original production technique, changes pottery, make product have better advantage, as good combination property, the resistance to air loss height, the folding strength height, anti acid alkali performance is strong, dc breakdown intensity height, not easily broken and advantages such as yellow greyness phenomenon can not occur.
The present invention has broken through at present and has been still with CaO-Al both at home and abroad
2O
3-SiO
2, MgO-Al
2O
3-SiO
2, CaO-Al
2O
3-MgO-SiO
2Three kinds of systems are the situation of main body, become new ceramic systems, i.e. a CaO-Al
2O
3-MgO-ZrO
2-SiO
2System.
The present invention compared with prior art has following advantage:
The present invention adopts at original ceramic raw material increases an amount of zirconium raw material, because zirconium has wear-resistant, corrosion-resistant, characteristics such as high temperature resistant, make the ceramic product have that has zirconium at the coefficient of expansion, crystalline phase globule size etc. can adapt to user's glazing specification of quality, can eliminate in metallization sealing-in operation especially and yellow greyness phenomenon occur, the up-to-standard rate of metal sealing is increased to more than 96% by original 80%, product tensile strength, antiacid basicity is improved largely, and each quality index all is greatly improved, its good combination property, the resistance to air loss height, the folding strength height, anti acid alkali performance is strong, dc breakdown intensity height, not easily broken and yellow greyness phenomenon can not occur.
Description of drawings
Accompanying drawing 1 detects the results of property table for electronic ceramics product of the present invention;
Accompanying drawing 2 is the microstructure synoptic diagram of the pottery of product of the present invention and prior art.
Embodiment
To be further described the present invention below:
Embodiment one
The described CaO-Al of the embodiment of the invention
2O
3-MgO-ZrO
2-SiO
2Be the aluminium sesquioxide electronic ceramics, this electronic ceramics is made up of following each raw material weight per-cent:
Al
2O
3?94％ SiO
2 4％ ZrO
2 0.3％
CaO 0.2％ MgO?0.8％ BaO 0.5％
Fe
2O
30.02% all the other be impurity.
Its manufacturing process is probably as follows:
1, with raw material A l
2O
3, SiO
2, ZrO
2, CaO, MgO etc. pulverize;
2, add paraffin liquid and join slurry;
3, raw material is joined the slurry aftershaping;
4, carry out the de-waxing operation, the needed temperature of this de-waxing operation is about 1100 ℃;
5, carry out sintering circuit at the twin tunnel kiln, about 1650 ℃ of the required temperature of sintering circuit;
6, processing grinding is modified;
7, finished product packing.
In step 3, this moulding process can adopt isostatic pressing technology or hot die-casting molding technology to carry out moulding, and the above-mentioned type production technique is not described in detail at this for the production technique of existing pottery.
The present embodiment product has good combination property, volume density is big, the resistance to air loss height, anti acid alkali performance is strong, folding strength is high, Heat stability is good, not easily broken and yellow greyness phenomenon can not occur, its coefficient of expansion, crystalline phase globule size etc. can adapt to user's glazing specification of quality, it is big to have volume specific resistance simultaneously, advantage that chemical stability is good or the like is shown in accompanying drawing 1, accompanying drawing 2.
Embodiment two
The described CaO-Al of the embodiment of the invention
2O
3-MgO-ZrO
2-SiO
2Be the aluminium sesquioxide electronic ceramics, this electronic ceramics is made up of following each raw material weight per-cent:
Al
2O
3?93.6％ SiO
2 3.6％ ZrO
2 0.2％
CaO 0.3％ MgO 0.9％ BaO 0.6％
Fe
2O
30.05% all the other be impurity.
The production technique of the production technique of present embodiment and embodiment one all is the complete processing that tradition is made pottery, is not described in detail at this.
The present embodiment product has at the coefficient of expansion, crystalline phase globule size etc. can adapt to user's glazing specification of quality, can eliminate in metallization sealing-in operation especially and yellow greyness phenomenon occur, the up-to-standard rate of metal sealing is increased to more than 96% by original 80%, product tensile strength, antiacid basicity is improved largely, and each quality index all is greatly improved, the manufacturing process of product of the present invention is adapted to the production technique of traditional ceramics product again, that is to say the prescription that under the prerequisite that does not change original production technique, changes pottery, make product have better advantage, as good combination property, the resistance to air loss height, the folding strength height, anti acid alkali performance is strong, dc breakdown intensity height, not easily broken and advantages such as yellow greyness phenomenon can not occur, as accompanying drawing 1, shown in the accompanying drawing 2.
Embodiment three
The described CaO-Al of the embodiment of the invention
2O
3-MgO-ZrO
2-SiO
2Be the aluminium sesquioxide electronic ceramics, this electronic ceramics is made up of following each raw material weight per-cent:
Al
2O
3?93％ SiO
2 3％ ZrO
2 0.6％
CaO 0.4％ MgO 1％ BaO 0.2％
Fe
2O
30.01% all the other be impurity.
The production technique of the production technique of present embodiment and embodiment one all is the complete processing that tradition is made pottery, is not described in detail at this.
The present embodiment product has good combination property, volume density is big, and resistance to air loss height, folding strength height, Heat stability is good are not easily broken and advantages such as yellow greyness phenomenon can not occur, shown in accompanying drawing 1, accompanying drawing 2.
ZrO
2(zirconium dioxide) is a kind of novel toughening ceramic material, and it has characteristics such as wear-resistant, corrosion-resistant, high temperature resistant, has good ion-exchange performance simultaneously, is ideal polyfunctional catalyst and support of the catalyst.
The above is preferred embodiment of the present invention only, is not that the present invention is done any pro forma restriction; The those of ordinary skill of all industry, but all shown in the by specification and the above, and implement the present invention swimmingly; But, all those skilled in the art, in not breaking away from the technical solution of the present invention scope, when can utilizing the above technology contents that discloses, and the equivalent variations with differentiation are changed, modified to being permitted of making a bit, is equivalent embodiment of the present invention; Simultaneously, all foundations essence technology of the present invention all still belongs in the scope of technical scheme of the present invention change, modification and the differentiation etc. of any equivalent variations that above embodiment did.
Claims (2)
1.CaO-Al
2O
3-MgO-ZrO
2-SiO
2Be the aluminium sesquioxide electronic ceramics, it is characterized in that this electronic ceramics is made up of following each raw material weight per-cent:
Al
2O
3?93～94％?SiO
2?3～4％?ZrO
2?0.2～0.6％
CaO?0.2～0.4％?MgO?0.8～1％?BaO?0.2～0.6％
Fe
2O
30.01～0.05% all the other be impurity.
2. aluminium sesquioxide electronic ceramics according to claim 1 is characterized in that described this electronic ceramics is made up of following each raw material weight per-cent:
Al
2O
3?94％?SiO
2?4％?ZrO
2?0.3％
CaO?0.2％?MgO?0.8％?BaO?0.5％
Fe
2O
30.02% all the other be impurity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100324369A CN101250057B (en) | 2007-12-14 | 2007-12-14 | CaO-Al2O3-MgO-ZrO2-SiO2 series aluminum oxide electronic ceramics |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100324369A CN101250057B (en) | 2007-12-14 | 2007-12-14 | CaO-Al2O3-MgO-ZrO2-SiO2 series aluminum oxide electronic ceramics |
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|---|---|
| CN101250057A CN101250057A (en) | 2008-08-27 |
| CN101250057B true CN101250057B (en) | 2010-12-08 |
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| CN101830710B (en) * | 2009-03-10 | 2012-10-03 | 北京嘉邦环保工程技术有限责任公司 | Ceramic anchoring piece and method for preparing same |
| CN102167595B (en) * | 2010-12-04 | 2013-08-21 | 大埔县特陶科技有限公司 | Control method for dewaxing process of alumina ceramic vacuum tube product with shell wall thickness of over 15 millimeters |
| CN102086118B (en) * | 2010-12-10 | 2013-03-06 | 天津市中环电陶有限公司 | Aluminum oxide ceramic prone to Mo-Mn metallization and preparation method of aluminum oxide ceramic |
| CN102515723B (en) * | 2011-12-31 | 2013-10-16 | 中国电子科技集团公司第十三研究所 | Refined white ceramic material and preparation method thereof |
| CN102690104B (en) * | 2012-06-28 | 2014-05-14 | 江苏南瓷绝缘子股份有限公司 | Direct-current porcelain insulator and preparation method thereof |
| CN102875157A (en) * | 2012-11-07 | 2013-01-16 | 毕鹏云 | Preparation method of aluminum oxide ceramics |
| FR3058256B1 (en) * | 2016-11-02 | 2021-04-23 | Thales Sa | ELECTRICAL INSULATION BASED ON ALUMINA CERAMIC, PROCESS FOR REALIZING THE INSULATION AND VACUUM TUBE INCLUDING THE INSULATION |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1165124A (en) * | 1996-02-13 | 1997-11-19 | 尼卡特株式会社 | Abradability aluminium oxide ceramics and its manufacture method |
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2007
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1165124A (en) * | 1996-02-13 | 1997-11-19 | 尼卡特株式会社 | Abradability aluminium oxide ceramics and its manufacture method |
Non-Patent Citations (2)
| Title |
|---|
| 肖汉宁等.高耐磨氧化铝陶瓷的材料设计与性能研究.陶瓷学报25 2.2004,25(2),81-84. |
| 肖汉宁等.高耐磨氧化铝陶瓷的材料设计与性能研究.陶瓷学报25 2.2004,25(2),81-84. * |
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