Ceramic material and preparation method thereof

A technology of ceramic materials and ceramic powders, applied in the field of ceramic materials, can solve the problems of limiting the application of alumina ceramic materials, affecting product quality, and large capacity loss, achieving the advantages of small porosity, improved mechanical properties, and reduced abrasive wear. Effect

Inactive Publication Date: 2012-07-25
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the friction coefficient of alumina ceramics in the prior art is relatively high, and the capacity loss in engineering applications is relatively large, which affects the quality of products and limits the further application of alumina ceramic materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh raw materials according to the following formula: (kg)

[0034] Aluminum oxide powder 93.6, zirconia powder 6, yttrium oxide powder 0.4.

[0035] Preparation:

[0036] (1) Accurately weigh the alumina powder, zirconia powder, and yttrium oxide powder according to the above formula for later use. Among them, the alumina powder had an average particle diameter of 0.26 μm and a purity of 99.8%. And a binder solution is configured, and the binder solution is a polyvinyl alcohol solution with a concentration of 7%. Among them, the following method can be used to prepare the polyvinyl alcohol solution: mix the polyvinyl alcohol powder and water in proportion, put it into a constant temperature water bath and heat it, the heating temperature is 100°C, and the holding time is 8 hours.

[0037] (2) Put the weighed powder and binder solution in a ball mill jar, and mill for 12 hours to obtain a uniformly mixed solution; wherein, the quality of the added binder solution ...

Embodiment 2

[0043] Weigh raw materials according to the following formula: (kg)

[0044] Aluminum oxide powder 89.2, zirconia powder 10, yttrium oxide powder 0.8.

[0045] The preparation method is as in Example 1.

Embodiment 3

[0047] Weigh raw materials according to the following formula: (kg)

[0048] Aluminum oxide powder 92.4, zirconia powder 7, yttrium oxide powder 0.6.

[0049] The preparation method is as in Example 1.

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Abstract

The invention discloses a ceramic material and a preparation method thereof, which belong to the technical field of ceramic materials. The ceramic material is made of, by weight, 89.2-93.6% of alumina powder, 6-10% of zirconia powder and 0.4-0.8% of yttria powder. By adding the yttria into the ceramic material, dynamic performance of the ceramic material is improved, voidage of the ceramic material is decreased, and high fatigue limit can be achieved in stress alternative circulation. Further, owning to adding of the zirconia, the alumina ceramic material is reinforced, the fracture way of the ceramic material turns to be transcrystalline rupture with no crystalline grain pulled out, and accordingly abrasive wear is reduced, the ceramic material which is high in wear resistance, high in toughness and low in friction is obtained, and application range of the ceramic material in engineering is widened.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a ceramic material and a preparation method thereof. Background technique [0002] Ceramic materials are a kind of inorganic non-metallic materials made of natural or synthetic compounds after forming and high-temperature sintering. The ceramic materials manufactured by utilizing the special functions of ceramics on sound, light, electricity, magnetism, heat and other physical properties are called functional ceramics. There are many types of functional ceramics with different uses. Among them, alumina ceramics have become one of the most popular ceramic materials due to their excellent physical and mechanical properties, such as high hardness, high melting point, and good wear resistance, and are widely used in cutting tools, wear-resistant parts, high-temperature parts, etc. . [0003] However, the friction coefficient of alumina ceramics in the prior art is relati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 童幸生郎静袁耀华万宇杰江明王汉林
Owner JIANGHAN UNIVERSITY
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