CN103102144A - Method for firing 95 ceramic component by use of microwave high-temperature pushed slab kiln - Google Patents
Method for firing 95 ceramic component by use of microwave high-temperature pushed slab kiln Download PDFInfo
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- CN103102144A CN103102144A CN2013100408571A CN201310040857A CN103102144A CN 103102144 A CN103102144 A CN 103102144A CN 2013100408571 A CN2013100408571 A CN 2013100408571A CN 201310040857 A CN201310040857 A CN 201310040857A CN 103102144 A CN103102144 A CN 103102144A
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Abstract
The invention discloses a method for industrially producing a 95 ceramic component through microwave firing. The method comprises a process of quick heating and heat preservation of materials. In an air atmosphere, the materials are heated and fired by use of a microwave pushed slab kiln containing a certain number of microwave sources, and the microwave firing of the materials is finished by controlling the kiln temperature and the firing time. The method disclosed by the invention finishes quick firing of a 95 ceramic component through the microwave technology, obviously reduces energy consumption and improves efficiency.
Description
Technical field
The present invention relates to a kind of process for calcining of 95 ceramic components, be specifically related to a kind of method of utilizing microwave high-temperature pushed slab kiln to burn till 95 ceramic components.
Background technology
95 ceramic components refer to alumina composition content in porcelain piece between 93-97%, and main raw material used is that (mineral composition is mainly α-Al to industrial oxidation aluminium
2O
3, the powdery spheroid that is white in color is trigonal system).95 ceramic components have that physical strength is high, hardness is large, the high-frequency dielectric loss is little, high-temperature insulation resistance is high, resistance to chemical attack and the comprehensive premium properties such as heat-shock resistance is better, add that cost ratio zirconium white, silicon oxide are cheap, therefore obtain to use very widely, sales volume accounts for the first place in fine ceramics, domestic production enterprise reaches more than hundreds of families.Yet the firing temperature of general 95 ceramic components is up to 1650-1700 ℃, coal, electricity, gas, oily kiln loss are large especially, and energy consumption is high, significantly increased production cost, again because common kiln type of heating is thermal conduction, cause porcelain piece to be heated inequality and be out of shape, more having limited its production on a large scale.
The microwave firing technology is through the development of decades, and it has advantages of that routine techniques is incomparable.After penetrating into material internal, the high-temperature electric magnetic wave can cause repeatedly intensifying and strenuous exercise of material (as dielectric medium) internal freedom or bound charge (corner is son, ion and electronics etc. extremely), in intermolecular generation collision, friction and in-fighting, change micro-wave energy into heat energy, thereby generation high temperature reaches the purpose of burning till.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of porcelain piece and is heated evenly the microwave high-temperature pushed slab kiln that utilizes indeformable, that energy consumption is low, efficient is high and burns till the method for 95 ceramic components.
In order to solve the problems of the technologies described above, the method for microwave firing suitability for industrialized production 95 ceramic components provided by the invention, below step:
(1), with industrial Al
2O
3Through 1390 ℃～1410 ℃ calcinings of microwave high-temperature kiln, impel unsettled crystal formation to stable α-Al
2O
3Crystal conversion, gained target compound A;
(2) target compound A, calcium oxide, magnesium oxide, ferric oxide are mixed by the mass ratio of 0.95:0.01-0.05:0.03-0.04:0.02-0.04, adding mass ratio during mixing is 0.4% oleic acid, and oleic acid is grinding aid, obtains mixture B;
(3), gained mixture B is crossed 100 mesh sieves, take paraffin as wedding agent, carrying out slime vacuum in vacuum barrel processes: paraffin is crossed 80 mesh sieves after through the temperature fusing of 95 ℃～105 ℃, pour into after weighing with the wax bucket in, design temperature is 85 ℃～95 ℃, take in proportion mixture B, wax: the mass ratio of mixture B is 12:90～110, fully after mix and blend 1h～3h, change over to and carry out the slime vacuum processing in vacuum barrel, the pressure vacuum meter indicator value is-0.10Mpa～-0.06MPa, the time is 3h～5h, the gained mixture C;
(4), with the moulding of gained mixture C hot die-casting method, forming pressure is 0.3MPa～0.4MPa, is work in-process D after moulding;
(5), gained work in-process D is positioned over enters in non-metallic vessel in the microwave high-temperature kiln, speed with 0.8 ℃～1.2 ℃ of per minutes is warming up to 290 ℃～310 ℃, speed with 2 ℃～5 ℃ of per minutes is warming up to 590 ℃～610 ℃, and keep 30min～60min in this temperature, carry out the low temperature binder removal;
(6), binder removal carries out high temperature after complete and burns till the stage, is warming up to 1650 ℃～1700 ℃ with the speed of 5 ℃～10 ℃ of per minutes, and keeps 20min～40min in this temperature, mother prepares 95 ceramic components.
Described microwave high-temperature kiln is microwave high-temperature pushed slab kiln.
In above-mentioned steps (2), target compound A, calcium oxide, magnesium oxide, ferric oxide are mixed in mixer or ball mill.
Non-metallic vessel described in above-mentioned steps (5) is that crucible is 95 porcelain crucibles or 99 porcelain crucibles.
Adopt the microwave high-temperature pushed slab kiln that utilizes of technique scheme to burn till the method for 95 ceramic components, comprise that material is rapidly heated and insulating process, under air atmosphere, the microwave pushed bat kiln that use contains the some amount microwave source heats material and burns till, by controlling kiln temperature and firing time, complete the microwave firing to material, cause porcelain piece to be heated evenly and indeformable, complete the burning till fast of 95 ceramic components by microwave technology, significantly reduced energy consumption, improved efficient.
In sum, the present invention is that a kind of porcelain piece is heated evenly the microwave high-temperature pushed slab kiln that utilizes indeformable, that energy consumption is low, efficient is high burns till the method for 95 ceramic components.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
A kind of method of microwave firing suitability for industrialized production 95 ceramic components, concrete enforcement comprises the following steps:
(1) with industrial Al
2O
3Through 1400 ℃ of calcinings of microwave high-temperature pushed slab kiln, impel unsettled crystal formation to stable α-Al
2O
3Crystal conversion, gained target compound A;
(2) target compound A, calcium oxide, magnesium oxide, ferric oxide are mixed in mixer or ball mill by the mass ratio of 0.95:0.03:0.03:0.03, adding mass ratio during mixing is 0.4% oleic acid, and oleic acid is grinding aid, obtains mixture B;
(3) gained mixture B is crossed 100 mesh sieves, take paraffin as wedding agent, carry out slime vacuum and process in vacuum barrel.Paraffin is crossed 80 mesh sieves after through the temperature of 100 ℃ fusing, pour into after weighing with the wax bucket in, design temperature is 90 ℃, simultaneously take in proportion mixture B, wax: the mass ratio of mixture B is 12:100, fully after mix and blend 2h, change over to and carry out the slime vacuum processing in vacuum barrel, the pressure vacuum meter indicator value is-0.06MPa that the time is 4h, the gained mixture C;
(4) with the moulding of gained mixture C hot die-casting method, forming pressure is 0.3MPa, is work in-process D after moulding;
(5) gained work in-process D is positioned in 95 porcelain crucibles enters in microwave high-temperature pushed slab kiln, be warming up to 300 ℃ with the speed of 1 ℃ of per minute, be warming up to 600 ℃ with the speed of 2 ℃ of per minutes, and keep 30min in this temperature, carry out the low temperature binder removal;
(6) binder removal carries out high temperature after complete and burns till the stage, is warming up to 1650 ℃ with the speed of 5 ℃ of per minutes, and keeps 40min in this temperature, namely prepares 95 ceramic components.
Product performance detect:
1, its volume density of 95 ceramic components that makes by present method is tested by GB2413, greater than 3.72g/cm
3The HRA Rockwell hardness is about 80; Its crystal mean particle size of the aobvious number of section is about 6um;
2, its bending strength of 95 ceramic components that makes by present method is tested by the GB/T5533 method, more than or equal to 320MPa; Ultimate compression strength is pressed the test of GB/T5593 method, more than or equal to 2000MPa;
3, its thermal conductivity of the 95 ceramic components GB5593 method test that makes by present method, more than or equal to 24W/mK, the coefficient of expansion is pressed the test of GB5594.3 method, between 7.6-8.0;
4, its dielectric strength of 95 ceramic components that makes by present method is tested by the GB775.2 method, more than or equal to 18ac/kV/mm; Specific inductivity is pressed the test of GB5597 method, between 9-10; Dielectric loss is pressed the test of GB5594.4 method, less than or equal to 2.4 * 10
-4
5, its body resistance of 95 ceramic components that make by present method is than by the test of GB5594.5 method, at 25 ℃, 500 ℃, 1000 ℃ three temperature respectively more than or equal to 10
14, 10
9, 10
6
Embodiment 2:
A kind of method of microwave firing suitability for industrialized production 95 ceramic components, concrete enforcement comprises the following steps:
(1) with industrial Al
2O
3Through 1390 ℃ of calcinings of microwave high-temperature pushed slab kiln, impel unsettled crystal formation to stable α-Al
2O
3Crystal conversion, gained target compound A;
(2) target compound A, calcium oxide, magnesium oxide, ferric oxide are mixed in mixer or ball mill by the mass ratio of 0.95:0.01:0.03:0.02, adding mass ratio during mixing is 0.4% oleic acid, and oleic acid is grinding aid, obtains mixture B;
(3) gained mixture B is crossed 100 mesh sieves, take paraffin as wedding agent, carry out slime vacuum and process in vacuum barrel.Paraffin is crossed 80 mesh sieves after through the temperature of 95 ℃ fusing, pour into after weighing with the wax bucket in, design temperature is 85 ℃, simultaneously take in proportion mixture B, wax: the mass ratio of mixture B is 12:90, fully after mix and blend 1h, change over to and carry out the slime vacuum processing in vacuum barrel, the pressure vacuum meter indicator value is-0.08MPa that the time is 3h, the gained mixture C;
(4) with the moulding of gained mixture C hot die-casting method, forming pressure is 0.4MPa, is work in-process D after moulding;
(5) gained work in-process D is positioned in 99 porcelain crucibles enters in microwave high-temperature pushed slab kiln, be warming up to 290 ℃ with the speed of 0.8 ℃ of per minute, be warming up to 590 ℃ with the speed of 3 ℃ of per minutes, and keep 40min in this temperature, carry out the low temperature binder removal;
(6) binder removal carries out high temperature after complete and burns till the stage, is warming up to 1680 ℃ with the speed of 8 ℃ of per minutes, and keeps 30min in this temperature, namely prepares 95 ceramic components.
Product performance detect:
1, its volume density of 95 ceramic components that makes by present method is tested by GB2413, greater than 3.72g/cm
3The HRA Rockwell hardness is about 80; Its crystal mean particle size of the aobvious number of section is about 6um;
2, its bending strength of 95 ceramic components that makes by present method is tested by the GB/T5533 method, more than or equal to 320MPa; Ultimate compression strength is pressed the test of GB/T5593 method, more than or equal to 2000MPa;
3, its thermal conductivity of the 95 ceramic components GB5593 method test that makes by present method, more than or equal to 24W/mK, the coefficient of expansion is pressed the test of GB5594.3 method, between 7.6-8.0;
4, its dielectric strength of 95 ceramic components that makes by present method is tested by the GB775.2 method, more than or equal to 18ac/kV/mm; Specific inductivity is pressed the test of GB5597 method, between 9-10; Dielectric loss is pressed the test of GB5594.4 method, less than or equal to 2.4 * 10
-4
5, its body resistance of 95 ceramic components that make by present method is than by the test of GB5594.5 method, at 25 ℃, 500 ℃, 1000 ℃ three temperature respectively more than or equal to 10
14, 10
9, 10
6
Embodiment 3:
A kind of method of microwave firing suitability for industrialized production 95 ceramic components, concrete enforcement comprises the following steps:
(1) with industrial Al
2O
3Through 1410 ℃ of calcinings of microwave high-temperature pushed slab kiln, impel unsettled crystal formation to stable α-Al
2O
3Crystal conversion, gained target compound A;
(2) target compound A, calcium oxide, magnesium oxide, ferric oxide are mixed in mixer or ball mill by the mass ratio of 0.95:0.05:0.04:0.04, adding mass ratio during mixing is 0.4% oleic acid, and oleic acid is grinding aid, obtains mixture B;
(3) gained mixture B is crossed 100 mesh sieves, take paraffin as wedding agent, carry out slime vacuum and process in vacuum barrel.Paraffin is crossed 80 mesh sieves after through the temperature of 105 ℃ fusing, pour into after weighing with the wax bucket in, design temperature is 95 ℃, simultaneously take in proportion mixture B, wax: the mass ratio of mixture B is 12:110, fully after mix and blend 3h, change over to and carry out the slime vacuum processing in vacuum barrel, the pressure vacuum meter indicator value is-0.10MPa that the time is 5h, the gained mixture C;
(4) with the moulding of gained mixture C hot die-casting method, forming pressure is 0.4MPa, is work in-process D after moulding;
(5) gained work in-process D is positioned in 95 porcelain crucibles enters in microwave high-temperature pushed slab kiln, be warming up to 310 ℃ with the speed of 1.2 ℃ of per minutes, be warming up to 610 ℃ with the speed of 5 ℃ of per minutes, and keep 60min in this temperature, carry out the low temperature binder removal;
(6) binder removal complete after between carry out high temperature and burn till the stage, be warming up to 1700 ℃ with the speed of 10 ℃ of per minutes, and keep 20min in this temperature, namely prepare 95 ceramic components.
Product performance detect:
1, its volume density of 95 ceramic components that makes by present method is tested by GB2413, greater than 3.72g/cm
3The HRA Rockwell hardness is about 80; Its crystal mean particle size of the aobvious number of section is about 6um;
2, its bending strength of 95 ceramic components that makes by present method is tested by the GB/T5533 method, more than or equal to 320MPa; Ultimate compression strength is pressed the test of GB/T5593 method, more than or equal to 2000MPa;
3, its thermal conductivity of the 95 ceramic components GB5593 method test that makes by present method, more than or equal to 24W/mK, the coefficient of expansion is pressed the test of GB5594.3 method, between 7.6-8.0;
4, its dielectric strength of 95 ceramic components that makes by present method is tested by the GB775.2 method, more than or equal to 18ac/kV/mm; Specific inductivity is pressed the test of GB5597 method, between 9-10; Dielectric loss is pressed the test of GB5594.4 method, less than or equal to 2.4 * 10
-4
5, its body resistance of 95 ceramic components that make by present method is than by the test of GB5594.5 method, at 25 ℃, 500 ℃, 1000 ℃ three temperature respectively more than or equal to 10
14, 10
9, 10
6
Claims (4)
1. the method for microwave firing suitability for industrialized production 95 ceramic components is characterized in that: below step:
(1), with industrial Al
2O
3Through 1390 ℃～1410 ℃ calcinings of microwave high-temperature kiln, impel unsettled crystal formation to stable α-Al
2O
3Crystal conversion, gained target compound A;
(2) target compound A, calcium oxide, magnesium oxide, ferric oxide are mixed by the mass ratio of 0.95:0.01-0.05:0.03-0.04:0.02-0.04, adding mass ratio during mixing is 0.4% oleic acid, and oleic acid is grinding aid, obtains mixture B;
(3), gained mixture B is crossed 100 mesh sieves, take paraffin as wedding agent, carrying out slime vacuum in vacuum barrel processes: paraffin is crossed 80 mesh sieves after through the temperature fusing of 95 ℃～105 ℃, pour into after weighing with the wax bucket in, design temperature is 85 ℃～95 ℃, take in proportion mixture B, wax: the mass ratio of mixture B is 12:90～110, fully after mix and blend 1h～3h, change over to and carry out the slime vacuum processing in vacuum barrel, the pressure vacuum meter indicator value is-0.10Mpa～-0.06MPa, the time is 3h～5h, the gained mixture C;
(4), with the moulding of gained mixture C hot die-casting method, forming pressure is 0.3MPa～0.4MPa, is work in-process D after moulding;
(5), gained work in-process D is positioned over enters in non-metallic vessel in the microwave high-temperature kiln, speed with 0.8 ℃～1.2 ℃ of per minutes is warming up to 290 ℃～310 ℃, speed with 2 ℃～5 ℃ of per minutes is warming up to 590 ℃～610 ℃, and keep 30min～60min in this temperature, carry out the low temperature binder removal;
(6), binder removal carries out high temperature after complete and burns till the stage, is warming up to 1650 ℃～1700 ℃ with the speed of 5 ℃～10 ℃ of per minutes, and keeps 20min～40min in this temperature, mother prepares 95 ceramic components.
2. the method for microwave firing suitability for industrialized production 95 ceramic components according to claim 1, is characterized in that: in above-mentioned steps (2), target compound A, calcium oxide, magnesium oxide, ferric oxide are mixed in mixer or ball mill.
3. the method for microwave firing suitability for industrialized production 95 ceramic components according to claim 1 and 2, it is characterized in that: described microwave high-temperature kiln is microwave high-temperature pushed slab kiln.
4. the method for microwave firing suitability for industrialized production 95 ceramic components according to claim 1 and 2, it is characterized in that: the non-metallic vessel described in above-mentioned steps (5) is that crucible is 95 porcelain crucibles or 99 porcelain crucibles.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274709A (en) * | 2013-06-13 | 2013-09-04 | 常熟市塔帕工业陶瓷有限公司 | Ceramic load bearing board |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353255A (en) * | 2011-08-05 | 2012-02-15 | 湖南省中晟热能科技有限公司 | Microwave high-temperature pushed slab kiln |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353255A (en) * | 2011-08-05 | 2012-02-15 | 湖南省中晟热能科技有限公司 | Microwave high-temperature pushed slab kiln |
Non-Patent Citations (1)
| Title |
|---|
| 张承学: "95瓷的生产工艺及其控制", 《佛山陶瓷》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274709A (en) * | 2013-06-13 | 2013-09-04 | 常熟市塔帕工业陶瓷有限公司 | Ceramic load bearing board |
| CN103274709B (en) * | 2013-06-13 | 2014-05-28 | 常熟市塔帕工业陶瓷有限公司 | Ceramic load bearing board |
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Application publication date: 20130515 |