CN102863213B - High-density magnesium-stabilized zirconia ceramic - Google Patents
High-density magnesium-stabilized zirconia ceramic Download PDFInfo
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- CN102863213B CN102863213B CN201210345193.5A CN201210345193A CN102863213B CN 102863213 B CN102863213 B CN 102863213B CN 201210345193 A CN201210345193 A CN 201210345193A CN 102863213 B CN102863213 B CN 102863213B
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Abstract
The invention relates to a high-density magnesium-stabilized zirconia ceramic which is prepared from the following raw materials: 80-99 mol% of ZrO2, 0.1-10 mol% of MgO, 0.1-0.5 mol% of Y2O3, 0.1-0.5 mol% of CaO and 0.1-5 wt% of sintering accelerator. The preparation technique comprises the following steps: A. preparing powder; and B. preparing ceramic: a. preparing a mixture, b. granulating, c. making a blank, d. discharging adhesive, and e. sintering at high temperature. According to the invention, the firing temperature of the ceramic material is greatly lowered, and the high-density ceramic material can be obtained only at 1600-1690 DEG C; and the relative density is up to 97% or so. The material has the advantages of high bending strength, favorable thermal shock resistance and high ionic conductivity.
Description
Technical field
This invention relates to zirconia ceramics field.
Technical background
Magnesium partial stabilization zirconium oxide ceramic has very good heat-shock resistance, therefore with it, manufactures oxygen concentration cell, is widely used in metallurgy industry, and the oxygen activity of molten metal is measured, and realizes the online detection in smelting process.Produce the oxygen cell of determining of excellent property, require magnesium stabilization zirconium oxide ceramic to have compared with high density; Very high mechanical bending strength; Very good heat-shock resistance and higher high temperature ionic conductivity.For obtaining the magnesium partial stabilization zirconium oxide ceramic material of this premium properties, conventionally by chemical precipitation method, produce powder at present, must at the temperature higher than 1700 ℃, burn till, or adopt isostatic pressing, complex process, production cost is high.
Summary of the invention
The present invention produces powder by chemical precipitation method conventionally for current magnesium partial stabilization zirconium oxide ceramic material exactly, must at the temperature higher than 1700 ℃, burn till, or employing isostatic pressing, complex process, the deficiency of production cost height, and a kind of high-density magnesium stabilization zirconium oxide ceramic and preparation technology are provided.
High-density magnesium stabilization zirconium oxide ceramic, its proportioning raw materials is:
ZrO
2 80～99mol％ MgO 0.1～10mol％
Y
2O
3 0.1～0.5mol％ CaO 0.1～0.5mol％
Sintering aids 0.1～5wt%
Sintering aids is by Al
2o
3, SiO
2, TiO
2, Fe
2o
3form, its proportioning is:
Al
2O
3 10～40mol％ SiO
2 30～60mol％
TiO
2 20～50mol％ Fe
2O
3 0.5～20mol％。
Preparation technology is:
B, preparation: the raw material preparing by above proportioning is carried out to ball milling, adopt planetary mills wet grinding 5-7 hour, dry, then fill alms bowl, through 1000～1300 ℃ of calcinings, cross 100～200 mesh sieves, make powder;
The preparation of B, pottery:
A, batch mixing processed: by weight powder 70～88, paraffin 1～10, polyethylene or polypropylene 10～30, oleic acid 1～10 are mixed, make batch mixing;
B, granulation: batch mixing is passed through to tablets press granulation, ∮ 3～5mm;
C, base: by particle injection moulding machine injection moulding, make base substrate;
D, binder removal: base substrate is inserted in box-type furnace, temperature 100-500 ℃ binder removal 48～72 hours,
E, high temperature sintering: the base substrate after binder removal is put in corundum crucible, through 1600～1690 ℃ of sintering, obtained highdensity zircite product.
Advantage of the present invention is: the present invention adopts one package stabilizer MgO, Y
2o
3, CaO and add a certain amount of sintering aids: Al
2o
3, SiO
2, TiO
2, Fe
2o
3deng, use solid reaction process powder process.Stupalith firing temperature is reduced greatly, at 1600～1690 ℃, just can obtain high density ceramic material, its relative density reaches 97% left and right.The bending strength of material is high, good thermal shock, and ionic conductivity is high.With this material, can produce the high performance oxygen cell of determining.
Embodiment
Raw material is pressed mol proportioning:
ZrO
290mol% MgO 5mol% Y
2o
30.3mol% CaO 0.3mol% sintering aids 0.3wt%;
Sintering aids by mol proportioning is:
Al
2O
3 25mol％ SiO
2 40mol％
TiO
2 40mol％ Fe
2O
3 10mol％。
A, preparation: the raw material preparing by above proportioning is carried out to ball milling, adopt planetary mills wet grinding 5-7 hour, dry, then fill alms bowl, through 1000～1300 ℃ of calcinings, cross 100～200 mesh sieves, make powder;
The preparation of B, pottery:
A, batch mixing processed: powder 80kg, paraffin 5kg, polyethylene or polypropylene 20kg, oleic acid 5kg are mixed, make batch mixing;
B, granulation: batch mixing is passed through to tablets press granulation, ∮ 3～5mm;
C, base: by particle injection moulding machine injection molding, produce zirconium pipe body for oxygen cell;
D, binder removal: base substrate is inserted in box-type furnace, temperature 100-500 ℃ binder removal 48～72 hours,
E, high temperature sintering: the base substrate after binder removal is put in corundum crucible, through 1600～1690 ℃ of sintering, obtained highdensity oxygen cell zirconium tubing products.
Performance: measure the relative density of zirconium pipe by Archimedes's weighting method, its relative density can reach 97%.The bending strength of measuring zirconium pipe by mechanics measurement mechanical reaches 2000MPa.Heat-shock resistance, serviceability rate reaches more than 98%.Oxygen cell is light yellow with zirconium tube exterior.
Claims (1)
1. high-density magnesium stabilization zirconium oxide ceramic, is characterized in that its proportioning raw materials is:
ZrO
2 80～99mol％ M
gO 0.1～10mol％
Y
2O
3 0.1～0.5mol％ CaO 0.1～0.5mol％
Sintering aids 0.1～5wt%;
Sintering aids is by Al
2o
3, SiO
2, TiO
2, Fe
2o
3form, its proportioning is:
Al
2O
3 10～40mol％ SiO
2 30～60mol％
TiO
2 20～50mol％ Fe
2O
3 0.5～20mol％；
Its preparation technology is:
A, preparation: the raw material preparing by above proportioning is carried out to ball milling, adopt planetary mills wet grinding 5-7 hour, dry, then fill alms bowl, through 1000～1300 ℃ of calcinings, cross 100～200 mesh sieves, make powder;
The preparation of B, pottery:
A, batch mixing processed: by weight powder 70～88, paraffin 1～10, polyethylene or polypropylene 10～30, oleic acid 1～10 are mixed, make batch mixing;
B, granulation: batch mixing is passed through to tablets press granulation, ∮ 3～5mm;
C, base: by particle injection moulding machine injection moulding, make base substrate;
D, binder removal: base substrate is inserted in box-type furnace, temperature 100-500 ℃ binder removal 48～72 hours,
E, high temperature sintering: the base substrate after binder removal is put in corundum crucible, through 1600～1690 ℃ of sintering, obtained zircite product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210345193.5A CN102863213B (en) | 2012-09-14 | 2012-09-14 | High-density magnesium-stabilized zirconia ceramic |
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|---|---|---|---|
| CN201210345193.5A CN102863213B (en) | 2012-09-14 | 2012-09-14 | High-density magnesium-stabilized zirconia ceramic |
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| CN102863213A CN102863213A (en) | 2013-01-09 |
| CN102863213B true CN102863213B (en) | 2014-02-05 |
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Cited By (1)
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| RU2698880C1 (en) * | 2018-04-09 | 2019-08-30 | федеральное государственное бюджетное образовательное учреждение высшего образования "Тамбовский государственный университет имени Г.Р. Державина" | Method of making ceramics based on zirconium dioxide |
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| CN106588037A (en) * | 2016-11-02 | 2017-04-26 | 湖北扬攀冶金科技有限公司 | Zirconium oxide high temperature furnace being high temperature impact resistant |
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