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Aluminum oxide powder, aluminum oxide ceramic and preparation method of aluminum oxide ceramic

An alumina ceramic powder and alumina technology, which is applied in the field of sewage treatment, can solve problems such as affecting the mechanical quality and optoelectronic properties of alumina ceramics, limiting the wide application of alumina ceramics, and easily breaking alumina ceramic rods. The effect of product compactness, stress dispersion, and strength enhancement

Inactive Publication Date: 2021-01-22
ZHENGZHOU HICER HIGH TECH CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, microscopically, alumina ceramic material is a material combined with covalent bonds and ionic bonds. Fracture occurs under the strain value, which greatly limits the wide application of alumina ceramics
[0003] At present, the bending strength of alumina ceramic rods used for precision resistors is not high, and alumina ceramic rods of this strength are easy to break under force
In addition, during the production process of alumina ceramics, high temperature will lead to the rapid growth of alumina crystals. This result will cause the gas inside the ceramics to be trapped in the ceramics to form bubbles, which will affect the mechanical quality and quality of alumina ceramics. Photoelectric properties

Method used

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  • Aluminum oxide powder, aluminum oxide ceramic and preparation method of aluminum oxide ceramic
  • Aluminum oxide powder, aluminum oxide ceramic and preparation method of aluminum oxide ceramic
  • Aluminum oxide powder, aluminum oxide ceramic and preparation method of aluminum oxide ceramic

Examples

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Effect test

Embodiment 1

[0020] Preparation of alumina ceramics

[0021] An alumina ceramic powder, comprising the following components according to the weight fraction: 100-115 parts of alumina, 23-28 parts of aluminum hydroxide, 5-6 parts of magnesium oxide, 6-7 parts of titanium dioxide powder, and magnesium silicon nitride powder 1-5 parts and 10-15 parts of silane coupling agent, 3-4 parts of binder, 15-20 parts of zirconia, 2-6 parts of aluminum nitride powder, 1-2 parts of defoaming agent and AlF 3 5-8 servings.

[0022] Wherein, the binder is at least one of paraffin wax, stearic acid, polyethylene and polypropylene.

[0023] The alumina powder includes 10%-30% of alumina powder with particle diameter of 0.5-0.6 micron, 10%-30% of alumina powder of 1-1.8 micron and 40%-80% of alumina powder of 2-3 micron.

[0024] Alumina ceramics prepared by using the above powder,

[0025] A method for preparing alumina ceramics, comprising the steps of:

[0026] (1) Mix and grind alumina, aluminum hydro...

Embodiment 3

[0034] The alumina powder in Example 3 includes 20% of the alumina powder with a particle size of 0.5-0.6 microns, 20% of the alumina powder of 1-1.8 microns and 60% of the alumina powder of 2-3 microns.

Embodiment 4

[0035] The alumina powder in Example 4 includes 10% of the alumina powder with a particle size of 0.5-0.6 microns, 30% of the alumina powder of 1-1.8 microns and 60% of the alumina powder of 2-3 microns.

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Abstract

The invention relates to aluminum oxide powder, and an aluminum oxide ceramic and a preparation method thereof, and provides aluminum oxide ceramic powder, which comprises the following components inparts by weight: 100-115 parts of aluminum oxide, 23-28 parts of aluminum hydroxide, 5-6 parts of magnesium oxide, 6-7 parts of titanium dioxide powder, 1-5 parts of magnesium silicon nitride powder,10-15 parts of a silane coupling agent, 3-4 parts of a binder, 15-20 parts of zirconium oxide, 2-6 parts of aluminum nitride powder, 1-2 parts of a defoaming agent and 5-8 parts of AlF3. According tothe invention, the raw material components of the aluminum oxide ceramic are reasonably matched, so that the use quality of the aluminum oxide ceramic powder is optimized; and the green body is kept in a certain shape and has high density and compactness by virtue of the interaction force among aluminum nitride, aluminum oxide, zirconium oxide and magnesium oxide, so that ceramic sintering is facilitated, the sintering temperature can be reduced, and the ceramic density is improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an alumina ceramic and a preparation method thereof. Background technique [0002] Alumina ceramics have the characteristics of high temperature resistance, wear resistance, electrical insulation, oxidation resistance, corrosion resistance and high mechanical strength. The above excellent physical and chemical properties make them widely used in many fields such as national defense, construction, chemical industry and smelting. As we all know, microscopically, alumina ceramic material is a material combined with covalent bonds and ionic bonds. Fracture occurs under the strain value, which greatly limits the wide application of alumina ceramics. [0003] At present, the bending strength of alumina ceramic rods used for precision resistors is not high, and alumina ceramic rods of this strength are easily broken by force. In addition, during the production process of alum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/63C04B35/632
CPCC04B35/10C04B35/622C04B35/6303C04B35/632C04B2235/3218C04B2235/3206C04B2235/3232C04B2235/38C04B2235/483C04B2235/3244C04B2235/3865C04B2235/445C04B2235/5445C04B2235/5436C04B2235/6022C04B2235/656C04B2235/6567C04B2235/96
Inventor 孟德安
Owner ZHENGZHOU HICER HIGH TECH CERAMICS
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