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Ceramic alumina connection method

A connection method and technology of alumina ceramics, which are applied in the microwave connection of alumina ceramics and the connection of ceramic aluminas, can solve the problems of difficult firing process, small critical cracks, increase the difficulty of processing ceramic components, etc., and achieve a simple process. , The effect of improving wettability and improving reliability

Inactive Publication Date: 2017-06-20
TIANJIN CITY CENTSTAGE TECH INCUBATOR COMPANY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

A disadvantage of alumina ceramics is that the increase of alumina content is accompanied by the increase of firing temperature, which brings difficulties to the firing process, and its inherent brittleness leads to extremely small critical cracks, which increases the difficulty of processing ceramic components.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] A kind of microwave connection method of alumina ceramics of the present invention, concrete steps are as follows:

[0018] (7) Preparation of intermediate phase: the original and its mass percentage content are 20.55-22.55wt% of Al-Si alloy powder, Al 2 o 3 28.63-30.80wt%, ZrO 2 25-30wt%, SiO 2 19.32-20.80wt%, Y 2 o 3 1.25-1.5wt%;

[0019] (8) After ball milling and mixing, dry and grind the ingredients, pass through a 200-mesh sieve, add ethanol to make a paste, and the solid phase content is 30%-50% of the paste mesophase;

[0020] (9) Apply the paste-like mesophase in step (2) evenly on the surface to be connected of alumina ceramics, connect the two connected surfaces and apply pressure, and dry in the air;

[0021] (10) Place the dried alumina ceramics in a mullite crucible, bury and burn them with alumina powder, and apply pressure to it;

[0022] (11) Microwave treatment, 1000W power treatment for 30min, and natural cooling to room temperature;

[0023] ...

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PUM

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Abstract

The invention provides a microwave connection method for alumina ceramics, which provides a low-melting point, fully wet ceramic surface, uses microwaves to realize local heating, and low-temperature rapid connection that connects first and then reacts in an oxidizing atmosphere, and forms a high-temperature resistant, A ceramic joining method for wear-resistant and corrosion-resistant joints. The method has simple procedures, can improve the wettability of the active intermediate layer and the oxide ceramics, and improves the reliability of the connection.

Description

technical field [0001] The invention relates to a connection method of alumina ceramics, in particular to a microwave connection method of alumina ceramics, which belongs to the field of ceramic connections. Background technique [0002] Alumina ceramics are currently the largest amount of ceramic and metal sealing materials at home and abroad. Its small dielectric constant, high specific volume resistance, low dielectric consumption and high thermal shock resistance can replace all other structural ceramics. The alumina porcelain currently produced in my country has 75% porcelain (75% mass fraction Al 2 o 3 , the same below), 95 porcelain, 97 porcelain and 99 porcelain, etc. One disadvantage of alumina ceramics is that the increase of alumina content is accompanied by the increase of firing temperature, which brings difficulties to the firing process, and its inherent brittleness leads to extremely small critical cracks, which increases the processing difficulty of ceram...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 王振华
Owner TIANJIN CITY CENTSTAGE TECH INCUBATOR COMPANY
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