Alumina ceramic and preparation method thereof

A technology of alumina ceramics and alumina, which is applied in the field of alumina ceramics and its preparation, can solve the problems of low flexural strength of 75 alumina ceramics, achieve the effects of reducing migration and relaxation, low sintering temperature, and improving surface finish

Inactive Publication Date: 2019-12-13
陕西澳华瓷业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flexural strength of 75 alumina ceramics prepared by the formula of the prior art is low, so it is necessary to develop a new formula of 75 alumina ceramics to improve the flexural strength while maintaining a low sintering temperature

Method used

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  • Alumina ceramic and preparation method thereof

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Effect test

Embodiment 1

[0026] The alumina ceramics of this embodiment is made of the following raw materials in parts by weight: 40 parts of alumina, 13 parts of calcined kaolin, 2 parts of bentonite, 2 parts of heavy magnesium carbonate, 2 parts of calcium carbonate, 2.3 parts of barium carbonate, 0.3 parts of glycerin 0.3 parts of emulsifying wax, 0.8 parts of titanium dioxide, 5 parts of zirconium dioxide and 0.5 parts of lanthanum oxide.

[0027] This embodiment also provides a method for preparing the above-mentioned alumina ceramics, the method comprising the following steps:

[0028] Step 1. Mix alumina, calcined kaolin, bentonite, heavy magnesium carbonate, calcium carbonate, barium carbonate, glycerin, emulsified wax, titanium dioxide, zirconium dioxide and lanthanum oxide to obtain a mixture, and add ball mill and water to the mixture After ball milling for 2.5 hours, adding a mass fraction of 10% polyvinyl alcohol aqueous solution, and then ball milling for 0.5 hours, passing through a 60...

Embodiment 2

[0037] The alumina ceramics of this embodiment is made of the following raw materials in parts by weight: 36 parts of alumina, 9 parts of calcined kaolin, 1 part of bentonite, 1 part of heavy magnesium carbonate, 1 part of calcium carbonate, 3 parts of barium carbonate, 0.5 parts of glycerin 0.5 parts of emulsifying wax, 1.0 parts of titanium dioxide, 8 parts of zirconium dioxide and 0.4 parts of lanthanum oxide.

[0038] This embodiment also provides a method for preparing the above-mentioned alumina ceramics, the method comprising the following steps:

[0039] Step 1. Mix alumina, calcined kaolin, bentonite, heavy magnesium carbonate, calcium carbonate, barium carbonate, glycerin, emulsified wax, titanium dioxide, zirconium dioxide and lanthanum oxide to obtain a mixture, and add ball mill and water to the mixture After ball milling for 3 hours, add a polyvinyl alcohol aqueous solution with a mass fraction of 10%, and then ball mill for 0.5 h, pass through a 60-mesh sieve to...

Embodiment 3

[0045] The alumina ceramics of this embodiment is made of the following raw materials in parts by weight: 46 parts of alumina, 16 parts of calcined kaolin, 3 parts of bentonite, 3 parts of heavy magnesium carbonate, 3 parts of calcium carbonate, 1 part of barium carbonate, 0.1 parts of glycerin 0.1 part of emulsifying wax, 0.5 part of titanium dioxide, 2 parts of zirconium dioxide and 0.6 part of lanthanum oxide.

[0046] This embodiment also provides a method for preparing the above-mentioned alumina ceramics, the method comprising the following steps:

[0047] Step 1. Mix alumina, calcined kaolin, bentonite, heavy magnesium carbonate, calcium carbonate, barium carbonate, glycerin, emulsified wax, titanium dioxide, zirconium dioxide and lanthanum oxide to obtain a mixture, and add ball mill and water to the mixture After ball milling for 2 hours, add a mass fraction of 10% polyvinyl alcohol aqueous solution, then ball mill for 0.5 h, pass through a 60-mesh sieve to obtain a s...

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Abstract

The invention provides an aluminum oxide ceramic. The aluminum oxide ceramic is prepared from aluminum oxide, calcined kaolin, bentonite, heavy magnesium carbonate, calcium carbonate, barium carbonate, glycerol, emulsified wax, titanium dioxide, zirconium dioxide and lanthanum oxide. The invention also provides a preparation method for the aluminum oxide ceramic. The preparation method comprises the following steps: mixing all the raw materials, adding water, carrying out ball milling, adding an aqueous polyvinyl alcohol solution with a mass fraction of 10%, continuing ball milling to obtain slurry, carrying out spray granulation to obtain a ceramic material, carrying out dry pressing molding, and performing roasting to obtain the aluminum oxide ceramic. According to the invention, Al2O3-SiO2-MgO-CaO composed of aluminum oxide, kaolin, bentonite, heavy magnesium carbonate and calcium carbonate is used as a basic system; barium carbonate, zirconium dioxide and lanthanum oxide are addedto serve as grain inhibitors; titanium dioxide serves as a solid solvent; glycerol and emulsified wax serve as dispersing agents; so the aluminum oxide ceramic with high bending strength is prepared.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to an alumina ceramic and a preparation method thereof. Background technique [0002] Alumina exists widely in nature and is one of the most practically used oxide materials. Alumina-based ceramic materials have excellent properties such as high strength, high hardness, wear resistance, high temperature resistance, corrosion resistance, high electrical insulation performance and low dielectric loss, so they have important application value in structural ceramics, electronic ceramics and bioceramics . Its raw materials have a wide range of sources and low prices. Cao Nanping and others used 60% alumina, 20% kaolin, 10% porcelain stone, and 10% alkaline earth metal mineral solvent as raw materials to prepare 75 alumina ceramics, and explored the effect of the amount of alkaline earth metal minerals on the ceramic properties. The experimental res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/626
CPCC04B35/10C04B35/622C04B35/62695C04B2235/3206C04B2235/3208C04B2235/3215C04B2235/3227C04B2235/3232C04B2235/3244C04B2235/349C04B2235/602C04B2235/6562C04B2235/6567C04B2235/661C04B2235/77C04B2235/96
Inventor 何舜姬军成刘见弟蒲忠敏高晓磊杨翊筠高帅
Owner 陕西澳华瓷业科技有限公司
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