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Formulation of microcrystal wear-resisting alumina ceramic

An alumina ceramic and formula technology, applied in the field of ceramic materials, can solve the problems of high sintering temperature and large grain size, and achieve the effect of improving bending strength and hardness and reducing grain size

Inactive Publication Date: 2009-09-09
JINGANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the usual alumina ceramic formula has a high sintering temperature, a large grain size, and the finished ceramic has micropores.
And ceramic products have defects in wear resistance and impact resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The microcrystalline wear-resistant alumina ceramic of the present invention preferably has the following components, all in parts by weight: Al 2 o 3 Powder 89000 parts kaolin 7500 parts, calcined talc 1500 parts, barium carbonate 500 parts, magnesium oxide 500 parts, dolomite 1000 parts, green body reinforcing agent 500 parts, polyvinyl alcohol 250 parts, sodium tripolyphosphate 250 parts, Germany Sima company 250 parts of 9300 doses produced, the ratio of water to material is 1:2. The microcrystalline wear-resistant alumina ceramic of this formula has a bending resistance of 410Pa, and its hardness Hv is as high as 1457.72MPa.

[0015] The steps of preparing the microcrystalline wear-resistant alumina ceramics from the raw materials in the above parts by weight are: (1) adding the powder into a ball mill, and ball milling until the particle size of the ball mill is 1.8 microns; (2) detecting the fineness of the slurry with a laser strength analyzer, and measuring th...

Embodiment 2

[0017] The microcrystalline wear-resistant alumina ceramic of the present invention preferably has the following components, all in parts by weight: Al 2 o 3 89200 parts of powder, 7480 parts of kaolin, 1510 parts of calcined talc, 490 parts of barium carbonate, 500 parts of magnesium oxide, 1000 parts of dolomite, 100 parts of green body strengthening agent, 249 parts of polyvinyl alcohol, 250 parts of sodium tripolyphosphate, Germany Sima The 5040 agent produced by the company is 250 parts, and the ratio of water to material is 1:2. The microcrystalline wear-resistant alumina ceramic with this formula has a bending resistance of 415Pa, and its hardness Hv is as high as 1456.85MPa.

[0018] The steps of preparing the microcrystalline wear-resistant alumina ceramics from the raw materials in the above parts by weight are: (1) adding the powder into a ball mill, and ball milling until the particle size of the ball mill is 1.8 microns; (2) detecting the fineness of the slurry w...

Embodiment 3

[0020] The microcrystalline wear-resistant alumina ceramic of the present invention preferably has the following components, all in parts by weight: Al 2 o 3 88800 parts of powder, 7510 parts of kaolin, 1510 parts of calcined talc, 500 parts of barium carbonate, 510 parts of magnesium oxide, 98 parts of dolomite, 100 parts of green body strengthening agent, 250 parts of polyvinyl alcohol, 250 parts of sodium tripolyphosphate, Germany Sima company 252 parts of 9300 doses were produced, and the ratio of water to material was 1:2. The microcrystalline wear-resistant alumina ceramic with this formula has a bending resistance of 413Pa, and its hardness Hv is as high as 1456.80MPa.

[0021] The steps of preparing the microcrystalline wear-resistant alumina ceramics from the raw materials in the above parts by weight are: (1) adding the powder into a ball mill, and ball milling until the particle size of the ball mill is 1.8 microns; (2) detecting the fineness of the slurry with a l...

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Abstract

The invention belongs to the field of ceramic materials, and in particular relates to a formulation of a microcrystal wear-resisting alumina ceramic. The formulation of the microcrystal wear-resisting alumina ceramic consists of the following components: Al2O3 powder, kaolin, burnt talc, barium carbonate, magnesium oxide, dolomite, blank enhancing powder and complex additive, wherein the complex additive consist of polyvinyl alcohol, sodium tripolyphosphate and liquefacients, and the liquefacients are agents of code 9300 and code 5040 produced by Germany Schwarz Corporation. The formulation has the following advantages: the formulation is added with a proper amount of the complex additive which is advantageous for reducing the grain size of the Al2O3; simultaneously, with the addition of the complex additive, the formulation is advantageous for improving the bending strength and the hardness of the Al2O3 complex phase ceramic; and when the added amount of the complex additive is 10 percent, the bending strength of the Al2O3 microcrystal wear-resisting ceramic is more than 400 Pa, and the hardness Hv of the Al2O3 microcrystal wear-resisting ceramic is also up to 1,456 MPa.

Description

technical field [0001] The invention belongs to the field of ceramic materials. In particular, it relates to a formula of microcrystalline wear-resistant alumina ceramics. Background technique [0002] Alumina ceramics are the most detailed and widely used ceramics in modern ceramics, with a density of 3.98g / cm 3 , the molecular weight of stoichiometric alumina is 101.96, and the most commonly used crystal type is α-Al with corundum structure 2 o 3 It belongs to the R3c space group, and each cell is composed of 10 molecules. The aluminum ions occupy two-thirds of the octahedral gaps by making the oxygen atoms close-packed approximately hexagonally. Al 2 o 3 Ceramic materials have been more and more widely used because of their excellent wear resistance, especially in the powder or fluid delivery systems of thermal power, steel, smelting, mining and other industries, and are gradually being used to replace traditional metal and organic materials. . Thanks Al 2 o 3 T...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/117C04B35/622
Inventor 赵友谊崔洪于冬镇
Owner JINGANG NEW MATERIALS
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