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A kind of preparation method of toughened alumina ceramics

An alumina ceramic and toughening technology is applied in the field of preparation of toughened alumina ceramics to achieve the effects of reducing production costs, promoting coagulation, and improving induction effects.

Active Publication Date: 2019-08-20
无锡特科精细陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Then there is a common weakness in alumina ceramics - brittleness, which is the main reason for limiting the continued expansion of its practical application range and its excellent performance.

Method used

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  • A kind of preparation method of toughened alumina ceramics
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  • A kind of preparation method of toughened alumina ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for preparing toughened alumina ceramics, characterized in that: the preparation steps are as follows:

[0047] Step 1, put the sludge from the aluminum profile factory into the reaction kettle, slowly stir and add hydrochloric acid dropwise until the pH is 3, let it stand for 1 hour, collect the mixed filtrate after filtering and washing;

[0048] Step 2, passing ammonia gas into the mixed filtrate, stirring evenly until no flocculation precipitate occurs, and obtaining the precipitated mixture after suction filtration;

[0049] Step 3, adding polyvinylpyrrolidone to the aqueous ethanol solution, and then slowly adding the precipitation mixture to obtain a stable suspension;

[0050] Step 4, adding nano-aluminum powder into the suspension, aeration and reflux reaction for 2 hours, adding a curing agent after the reaction to form a mixed suspension;

[0051] Step 5, putting the mixed suspension into a vacuum distillation device for vacuum distillation for 2 ho...

Embodiment 2

[0062] A method for preparing toughened alumina ceramics, characterized in that: the preparation steps are as follows:

[0063] Step 1, put the sludge from the aluminum profile factory into the reaction kettle, slowly stir and add hydrochloric acid dropwise until the pH is 5, let it stand for 3 hours, and collect the mixed filtrate after filtering and washing;

[0064] Step 2, passing ammonia gas into the mixed filtrate, stirring evenly until no flocculation precipitate occurs, and obtaining the precipitated mixture after suction filtration;

[0065] Step 3, adding polyvinylpyrrolidone to the aqueous ethanol solution, and then slowly adding the precipitation mixture to obtain a stable suspension;

[0066] Step 4, adding nano-aluminum powder into the suspension, aeration and reflux reaction for 4 hours, adding a curing agent after the reaction to form a mixed suspension;

[0067] Step 5, put the mixed suspension into a vacuum distillation device for vacuum distillation for 4 h...

Embodiment 3

[0078] A method for preparing toughened alumina ceramics, characterized in that: the preparation steps are as follows:

[0079] Step 1, put the sludge from the aluminum profile factory into the reaction kettle, slowly stir and add hydrochloric acid dropwise until the pH is 4, let it stand for 2 hours, and collect the mixed filtrate after filtering and washing;

[0080] Step 2, passing ammonia gas into the mixed filtrate, stirring evenly until no flocculation precipitate occurs, and obtaining the precipitated mixture after suction filtration;

[0081] Step 3, adding polyvinylpyrrolidone to the aqueous ethanol solution, and then slowly adding the precipitation mixture to obtain a stable suspension;

[0082] Step 4, adding nano-aluminum powder to the suspension, aeration and reflux reaction for 3 hours, adding a curing agent after the reaction to form a mixed suspension;

[0083] Step 5, put the mixed suspension into a vacuum distillation device for vacuum distillation for 3 hou...

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Abstract

The invention belongs to the technical field of preparation of ceramic materials, and particularly relates to a preparation method of toughened aluminum oxide ceramic. The preparation method comprisesthe following steps: by taking sludge of an aluminum profile factory as an aluminum source and taking an impurity in the sludge as a first additive, performing acid and alkali treatment and then suction filtration, thus obtaining additive impurity-containing aluminum sediments, adding the aluminum sediments into an ethyl alcohol aqueous solution, adding nano aluminum powder serving as a second additive, and performing aeration reaction and reduced pressure distillation, thus obtaining slurry; finally, performing grouting solidification in a microwave reaction manner, and after solidification,performing sintering, thus obtaining the toughened aluminum oxide ceramic. According to the preparation method, the sludge of the aluminum profile factory is used as the aluminum source, and the impurity in the sludge is used as a toughening additive and a stabilizer, so that the problem on environmental protection treatment of the sludge of the aluminum profile factory is solved, and the production cost of the aluminum oxide ceramic is also reduced.

Description

technical field [0001] The invention belongs to the technical field of ceramic material preparation, and in particular relates to a preparation method of toughened alumina ceramics. Background technique [0002] With the development of science and technology, applications in the fields of computers, electronic information, lasers, new energy, aerospace, marine and biological engineering have increasingly stringent requirements on the performance of materials such as high temperature resistance, corrosion resistance and wear resistance. Ceramic materials have excellent high strength, high hardness, high wear resistance and corrosion resistance, as well as low expansion coefficient and light weight, which are unmatched by metal materials. They are widely used in various material science fields, and various transparent ceramics, The development and application of cermets, conductive ceramics, etc. have made ceramic materials play an increasingly important role, and have broad a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/63C04B35/645
Inventor 刘名剑王征
Owner 无锡特科精细陶瓷有限公司
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