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Zirconia-doped alumina ceramic and preparation method thereof

A technology of alumina ceramics and zirconia, applied in the field of alumina ceramics doped with zirconia and its preparation, to achieve the effects of increasing density, increasing densification, and improving production technology

Active Publication Date: 2021-06-11
FUJIAN HUAQING ELECTRONICS MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, in view of the above content, the present invention provides a zirconia-doped alumina ceramic, which uses zirconia and aluminum borate whiskers to synergistically toughen the alumina ceramic material, further improves the toughening effect, and overcomes the single toughening method in the prior art Insufficiency

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  • Zirconia-doped alumina ceramic and preparation method thereof
  • Zirconia-doped alumina ceramic and preparation method thereof

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Embodiment 1

[0036]A zirconia-doped alumina ceramic, which is made of the following raw materials in parts by weight: 75 parts of α-alumina, 5 parts of yttria-stabilized zirconia, 2 parts of aluminum borate whiskers, titanium dioxide 2.4 parts, 3.6 parts of alkali-free aluminosilicate glass, 0.8 part of sodium polyacrylate, 2.1 parts of polyvinyl alcohol, 18 parts of isopropanol, 1.5 parts of dimethyl phthalate, and the alkali-free aluminosilicate glass consists of the following mass percentages The raw material composition: 20wt.% alumina, 56wt.% silicon dioxide, 24wt.% zinc oxide.

[0037] A method for preparing alumina ceramics doped with zirconia, comprising the following steps:

[0038] (1) Take each raw material according to the formula ratio, and set aside;

[0039] (2) The coupling agent and ethanol are formulated into a solution at a mass ratio of 1:20, and the yttria-stabilized zirconia is added to the solution, and the mass ratio of the yttria-stabilized zirconia to the couplin...

Embodiment 2

[0046] A zirconia-doped alumina ceramic, which is made of the following raw materials in parts by weight: 85 parts of α-alumina, 10 parts of yttria-stabilized zirconia, 4 parts of aluminum borate whiskers, titanium dioxide 5 parts, 4 parts of alkali-free aluminosilicate glass, 1.5 parts of naphthenic oil, 5 parts of polyvinyl butyral, 27 parts of butyl acetate, 4 parts of diethyl phthalate, the alkali-free aluminosilicate glass is composed of The following raw material composition by mass percentage: 22wt.% alumina, 60wt.% silicon dioxide, 18wt.% zinc oxide.

[0047] A method for preparing alumina ceramics doped with zirconia, comprising the following steps:

[0048] (1) Take each raw material according to the formula ratio, and set aside;

[0049] (2) The coupling agent and ethanol are formulated into a solution at a mass ratio of 1:20, and the yttria-stabilized zirconia is added to the solution, and the mass ratio of the yttria-stabilized zirconia to the coupling agent is 8...

Embodiment 3

[0056] A zirconia-doped alumina ceramic, which is made of the following raw materials in parts by weight: 95 parts of α-alumina, 15 parts of yttria-stabilized zirconia, 6 parts of aluminum borate whiskers, titanium dioxide 4 parts, 8 parts of alkali-free aluminosilicate glass, 2 parts of polyethylene glycol, 8.4 parts of carboxypropyl methylcellulose, 36 parts of ethanol, 6 parts of trioctyl phosphate, the alkali-free aluminosilicate glass consists of the following mass percentages The raw material composition: 25wt.% alumina, 64wt.% silicon dioxide, 11wt.% zinc oxide.

[0057] A method for preparing alumina ceramics doped with zirconia, comprising the following steps:

[0058] (1) Take each raw material according to the formula ratio, and set aside;

[0059] (2) The coupling agent and ethanol are formulated into a solution in a mass ratio of 1:20, and the yttria-stabilized zirconia is added to the solution, and the mass ratio of the yttria-stabilized zirconia to the coupling...

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Abstract

The invention relates to the field of ceramic materials, and provides zirconia-doped alumina ceramic and a preparation method thereof. The alumina ceramic is prepared from the following raw materials in parts by weight: 75-95 parts of alumina powder, 5-15 parts of zirconia, 2-6 parts of aluminum borate whiskers, 6-12 parts of a sintering aid, 0.8-2 parts of a dispersing agent, 2.1-8.4 parts of a binder and 18-36 parts of a solvent, wherein the sintering aid is a mixture of titanium dioxide and alkali-free aluminosilicate glass. The problem that the requirement of a high-quality ceramic material cannot be met by adopting a single toughening mode in the prior art is solved.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a zirconia-doped alumina ceramic and a preparation method thereof. Background technique [0002] Structural ceramic materials are favored by medical, aerospace, new energy, engines, cutting tools, electronic information and many other fields due to their excellent properties such as high hardness, high strength, high temperature resistance, corrosion resistance, wear resistance and good chemical stability. It has become an indispensable key material in the field of industrial technology and human daily life. However, structural ceramics have the disadvantage of high brittleness, which can cause brittle fracture without warning, which greatly limits the application of ceramic materials, especially the large-scale application in important components. Alumina ceramics are currently the most researched and widely used type of oxide ceramics among new materials. Improving the fractur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/64C04B35/80
CPCC04B35/10C04B35/622C04B35/64C04B2235/3244C04B2235/5216C04B2235/6025C04B2235/6562C04B2235/6567C04B2235/661C04B2235/96
Inventor 杨大胜施纯锡冯家伟
Owner FUJIAN HUAQING ELECTRONICS MATERIAL TECH
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