Low temperature sintered 99 aluminium oxide ceramic and its production method and use

A technology of alumina ceramics and low temperature sintering, applied in electrical components, circuits, electrical solid devices, etc., can solve the problems of large sintering deformation, cracking, low yield, etc., to improve yield and qualified rate, avoid environmental pollution, The effect of stable product quality

Inactive Publication Date: 2004-10-06
珠海粤科京华电子陶瓷有限公司
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  • Application Information

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Problems solved by technology

This leads to a relatively low solid phase content (mainly inorganic material content) of the slurry, which eventually leads to a serious deterioration in the formability of the green body and the performance of the sintered ceramic body.
[0004] 2. The low solid phase content of the slurry will lead to severe cracking during the casting process, and it is very difficult to dry, and the green body is easy to curl and deform during drying.
At the same time, the sintering deformation is relatively large, the product size is difficult to control, and the yield is extremely low.
Therefore, it cannot adapt to the large-scale production of large-area ceramic substrates.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] Embodiment 1: 99 alumina ceramic substrate - tape casting method

[0025] The basic chemical composition of product of the present invention is: (by weight percentage composition meter)

[0026] AL 2 o 3 99%;

[0027] The balance is ZrO 2 , MgO, Y 2 o 3 A mixture of any two or three compounds.

Embodiment approach 2

[0028] Embodiment two: the preferred basic chemical composition of product of the present invention is: (by weight percentage composition meter)

[0029] AL 2 o 3 99%;

[0030] ZrO 2 0.1-0.5%;

[0031] MgO 0.1-0.5%;

[0032] margin is Y 2 o 3 .

Embodiment approach 3

[0033] Embodiment three: another kind of basic chemical composition of product of the present invention is: (by weight percentage composition meter)

[0034] AL 2 o 3 99.6%;

[0035] The balance is ZrO 2 , MgO, Y 2 o 3 A mixture of any two or three compounds.

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PUM

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Abstract

A low-temp sintered alumina ceramics having 99% or 99.6% of alumina is prepared from alumina particles (2.0-2.5 microns), and sintering aid chosen from Y2O5, ZrO2 and MgO throgh shaping by doctor blading process or die pressing, degumming, and sintering in tunnel kiln at temp C04B 35/10 C04B 35/119 C04B 35/622 C04B 35/64 C04B 35/63 H01L 23/15 0 5 3 2003/4/2 1533999 2004/10/6 000000000 Yueke Qinghua Electronic Ceramic Co., Ltd., Zhuhai Guangdong 519015 Zhou Heping Wu Chongjuan Dang Guibin

Description

technical field [0001] The invention relates to low-temperature sintered 99 alumina ceramics, a manufacturing method and application thereof, and belongs to the field of special ceramics and its manufacturing. Background technique [0002] Most of the usual 99 alumina ceramic substrates or 99 alumina ceramic structural parts use alumina powder with an average particle size of 2.0-2.5 μm as the raw material, which is sintered at a relatively high temperature (≥1750°C). Due to the extremely high temperature, the limit operating temperature of the general continuous electric heating tunnel kiln is (1680°C), which cannot meet the sintering requirements, so a batch hydrogen atmosphere furnace or traditional hot-press sintering must be used. These two sintering methods require high equipment, low output and high overall cost. At present, various alumina ceramic sintering kilns are mainly continuous electric heating tunnel kilns, and the temperature cannot meet the sintering tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/119C04B35/622C04B35/63C04B35/64H01L23/15
Inventor 周和平吴崇隽党桂彬段正平
Owner 珠海粤科京华电子陶瓷有限公司
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