Aluminum oxide anti-static ceramic material and preparation method thereof

Abstract

The invention relates to a ceramic material and a preparation method. The ceramic material has the electrostatic dissipation characteristic of safe discharge of electrostatic charges. The aluminum oxide anti-static ceramic material comprises the following components: aluminum oxide, a nanometer second conductive phase and 3Y-zirconium oxide. Thus, the obtained aluminum oxide anti-static ceramic material has the characteristics of excellent antistatic performance, wear resistance, corrosion resistance, high toughness and high compactness. The invention also provides a simple, ageing-free and low-cost preparation method for the aluminum oxide anti-static ceramic material.

Description

technical field [0001] The invention relates to a ceramic material and a preparation method thereof. The ceramic material has static electricity dissipation characteristics for safe discharge of electrostatic charges. Background technique [0002] Static electricity is a static charge. Static electricity is formed when charges accumulate on an object or surface, and charges are divided into positive charges and negative charges, that is to say, static electricity is also divided into two types, namely positive static electricity and negative static electricity. Positive static electricity is formed when positive charges accumulate on an object, and negative static electricity is formed when negative charges accumulate on an object. object) or an object with a potential difference with it, charge transfer will occur, which is the phenomenon of spark electrostatic discharge that we see every day. [0003] In today's growing electronic industry era, various microelectronic an...

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Problems solved by technology

However, the defects in the current technology are also obvious: for example, the patent CN200480013963.X requires hot isostatic pressing to obtain an anti-static ceramic sintered body with good density and qualified resistivity, which is very expensive and not suitable for large-scale industrial production; Patent CN201010101876.7 uses a conventional air atmosphere for sintering, but in order to improve the compactness of the material, glass phases such as SiO2 are introduced, which greatly increases the brittleness of ceramics and reduces mechanical properties such as strength, hardness, and toughness; patent CN200710071983.8 is in The TiC conductive material is introduced into the zirconia ceramic matrix. Since TiC is easily oxidized in the air, it must be sintered in a vacuum atmosphere, which not only increases the cost, but is not conducive to large-scale production.

Moreover, zirconia ceramics have inherent defects of low-temperature aging. Although this defect can be compensated by various technical means, the cost is high, and the aging problem cannot be perfectly solved.

[0007] Since the current antistatic ceramic materials are prepared by introducing a micron-sized second conductive phase into the ceramic matrix, the content of the second phase required to form a conductive network is relatively large, and the second phase will be partially volatilized at high temperature, so it is necessary Adding more conductive phases (the general ratio is 20%-50% mass fraction) to the ceramic matrix raw materials can achieve the required volume resistivity, because the second phase will form a large amount of liquid phase when the ceramic is sintered, these liquid phases After the phase is cooled, a large number of glass phases are formed, and the mechanical properties of the glass phase itself are very poor, which greatly reduces the performance of the ceramic body itself

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