Black alumina ceramics, manufacturing method thereof, alumina ceramic device

A technology of black alumina and ceramics, applied in the field of ceramic materials, can solve the problems of large differences in thermal expansion coefficients of glass products, large differences in thermal expansion coefficients, uneven color, etc., to improve sealing quality and stability, dimensional stability, uniform color effect

Active Publication Date: 2019-04-05
SHENZHEN SUNTECH ADVANCED CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a black alumina ceramic and its preparation method to solve the problem of high sintering temperature, uneven color and difference in thermal expansion coefficient between the existing black alumina ceramics and glass products larger technical issues
[0009] Another purpose of the embodiments of the present invention is to provide a black alumina ceramic device to solve the technical problems of uneven color and large difference in thermal expansion coefficient between the existing black alumina ceramic device and glass products

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  • Black alumina ceramics, manufacturing method thereof, alumina ceramic device

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preparation example Construction

[0033] On the other hand, the embodiment of the present invention also provides a preparation method of the above-mentioned black alumina ceramic of the embodiment of the present invention. In one embodiment, the method for preparing black alumina ceramics according to the embodiment of the present invention includes the following steps:

[0034] Step S01: Weigh the raw materials of each component according to the following components contained in the black alumina ceramics:

[0035] Al 2 o 3 90%-95%, black toner 2.5%-9%, sintering aid 1%-2.5%;

[0036] Step S02: performing ball milling on each component raw material weighed in step S01, followed by drying and sieving;

[0037]Step S03: pre-sintering and pulverizing the mixed raw materials that have been sieved in step S02, and then molding them, and performing pressure sintering in a protective atmosphere to obtain black alumina ceramics.

[0038] Specifically, in the above step S01, the black toner is used to impart blac...

Embodiment 1

[0051] This embodiment 1 provides a black alumina ceramic and its preparation method. The black alumina ceramic contains the following components by mass percentage:

[0052] 90%Al 2 o 3 , 3% Fe 2 o 3 , 3% NiO, 3% Ti 4 o 7 , 0.5%Na 2 O and 0.5% K 2 O.

[0053] The preparation method of the black alumina ceramics is as follows:

[0054] S11: Weigh the raw materials of each component according to the above-mentioned mass percentages contained in the black alumina ceramics in Example 1;

[0055] S12: Perform ball milling on the weighed raw materials of each component, and then perform drying and sieving; wherein, the ball milling process is to mix the weighed raw materials of each component on a planetary ball mill for 4 hours, and the speed of the ball mill is 200 rpm min, the drying process is to dry in a vacuum drying oven for 10 hours, and the sieving process is to sieve powder with a 100-mesh stainless steel screen;

[0056] S13: Put the sieved mixed raw material ...

Embodiment 2

[0058] This embodiment 2 provides a black alumina ceramic and its preparation method. The black alumina ceramic contains the following components by mass percentage:

[0059] 93% Al 2 o 3 , 2% Fe 2 o 3 , 2% NiO, 0.5% Ti 4 o 7 , 1.25% Na 2 O and 1.25% K 2 O.

[0060] The preparation method of the black alumina ceramics is as follows:

[0061] S11: Weigh the raw materials of each component according to the above-mentioned mass percentages contained in the black alumina ceramics in Example 2;

[0062] S12: Perform ball milling on the weighed raw materials of each component, and then perform drying and sieving; wherein, the ball milling process is to mix the weighed raw materials of each component on a planetary ball mill for 8 hours, and the speed of the ball mill is 300 rpm min, the drying process is to dry in a vacuum drying oven for 18 hours, and the sieving process is to sieve powder with a 100-mesh stainless steel screen;

[0063] S13: Put the sieved mixed raw mat...

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Abstract

The invention discloses a black alumina ceramic, a preparation method thereof and an alumina ceramic device. The black alumina ceramic comprises components in percentage by mass as follows: 90%-95% of Al2O3, 2.5%-9% of a black toner and 1%-2.5% of a sintering aid. The heat expansion coefficient of the black alumina ceramic is close to that of a glass device, wettability for the black alumina ceramic and the glass device is improved, the difference of the heat expansion coefficients is reduced, the yield of sealing between the black alumina ceramic and a glass sealing piece in an application process is increased, and the black alumina ceramic has a uniform pure black color; according to the preparation method, the sintering temperature is low, the dimensional stability is realized, and the finished product ratio is high. The black alumina ceramic device is prepared from the black alumina ceramic.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a black alumina ceramic, a manufacturing method thereof, and an alumina ceramic device. Background technique [0002] Alumina ceramics have high strength (mechanical strength up to 150MPa), high hardness (Mohs hardness up to 9), wear resistance, corrosion resistance, high temperature resistance, good thermal conductivity, high insulation, low dielectric loss, stable electrical properties, etc. features. It can be made into integrated circuit substrates, cutting tools, acid and alkali resistant parts, artificial bones, abrasive materials, advanced refractory materials and phosphor carriers, etc., and is widely used in electronics, machinery, chemicals, medicine, optoelectronics, aerospace and other industries. [0003] Among them, black alumina ceramics have a series of superior properties such as shading, good air tightness, strong radiation resistance, hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/64C04B35/626
CPCC04B35/10C04B35/62615C04B35/62645C04B35/64C04B2235/3201C04B2235/3232C04B2235/3274C04B2235/3279C04B2235/602
Inventor 向其军谭毅成林勇钊
Owner SHENZHEN SUNTECH ADVANCED CERAMICS
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