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Composite ceramics

A technology of composite ceramics and weight, which is applied in the field of composite ceramics of alumina and zirconia, which can solve the problems of low performance index of alumina ceramics, large shrinkage rate of hardness and wear resistance, low batch repeatability of product size, etc. , to achieve high industrial production value, small shrinkage, and reduce the amount of paraffin used

Active Publication Date: 2018-11-30
湖南福美来电子陶瓷有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the various performance indicators of alumina ceramics produced by the existing technology are not high, and there are many problems such as hardness, wear resistance, and excessive shrinkage. For example, the published patent (application number 201510687711.5) adds 12% wax water; the greater the amount of wax water added, the larger the space occupied, the greater the shrinkage during the dewaxing and sintering process, and the lower the batch repeatability of the product size

Method used

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Embodiment

[0019]Embodiment: A kind of composite ceramics is made of the following components by weight: aluminum oxide 97%±0.1%, talc 3%±0.2%, zirconium dioxide 3.5%±0.1% and vanadium zirconium yellow 1%±0.1%. Using a high weight ratio of alumina, assisted by zirconia, talc and vanadium zirconium yellow, changes the hardness, wear resistance and toughness of alumina, which not only achieves higher hardness than other alumina ceramics, but also has other Alumina ceramics have better toughness, its hardness has reached 1100-1150 Vickers hardness, and its wear resistance has reached 30 million times, so it has a wide application prospect in the new energy automobile industry, especially for automotive seals and valves .

[0020] Zirconium dioxide is a polycrystalline refractory material. Due to the high melting point, non-oxidation and other high-temperature excellent properties of zirconia itself, zirconia has a higher service temperature than other refractory materials such as alumina, ...

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Abstract

The invention discloses composite ceramics prepared from the following components by weight: 97%+ / -0.1% of alumina, 3%+ / -0.2% of talc, 3.5%+ / -0.1% of zirconium dioxide and 1%+ / -0.1% of vanadium zirconium yellow. The hardness, wear resistance and toughness of alumina are changed by using high-weight-ratio alumina proportioning and supplement of zirconia, talc and vanadium zirconium yellow, the hardness higher than that of other alumina ceramics is achieved, the toughness better than that of other alumina ceramics is achieved, the hardness reaches 1100-1150 Vickers hardness, and the wear resistance also reaches 30 million times. Therefore, the composite ceramics have wide application prospects in new energy vehicle industry, and especially are applied in automotive seal parts and valves.

Description

technical field [0001] The invention relates to the field of metal oxide materials, in particular to a composite ceramic of alumina and zirconia. Background technique [0002] At present, the various performance indicators of alumina ceramics produced by the existing technology are not high, and there are many problems such as hardness, wear resistance, and excessive shrinkage. For example, the published patent (application number 201510687711.5) adds 12% wax water; the greater the amount of wax water added, the larger the space occupied, the greater the shrinkage during the dewaxing and sintering process, and the lower the batch repeatability of the product size. Contents of the invention [0003] The purpose of the present invention is just to provide a kind of composite ceramics in order to solve the above-mentioned problem, is made of the composition of following weight ratio: aluminum oxide 97% ± 0.1%, talc 3% ± 0.2%, zirconium dioxide 3.5% ± 0.1% and Vanadium Zircon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B2235/3248C04B2235/3244C04B2235/349
Inventor 陆挺
Owner 湖南福美来电子陶瓷有限公司
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