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High conductivity zinc oxide ceramic and preparation method thereof

A high-conductivity, zinc oxide technology, applied in the field of inorganic non-metallic materials, can solve the problems of easy escape, instability, and low mechanical strength of products, and achieve the effect of solving excessive sintering temperature and improving electrical conductivity.

Inactive Publication Date: 2014-04-02
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the easy escape of Zn and O in ZnO at high temperature, the mechanical strength of the sintered product is not high and unstable

Method used

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  • High conductivity zinc oxide ceramic and preparation method thereof
  • High conductivity zinc oxide ceramic and preparation method thereof

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Embodiment 1

[0021] ZnO+x wt%Al 2 o 3 , into the oxygen atmosphere pressure of 20 atmospheres for sintering, using the van der Pauw four-electrode method to measure the resistivity, mobility and carrier concentration of the film. in Al 2 o 3 In the case of a content of 2%, the pressure of the oxygen atmosphere is 20 atmospheres for sintering, and the resistivity, mobility and carrier concentration of the film are measured by the van der Pauw four-electrode method again. The electrical properties after sintering are shown in Table 1.

[0022] Table 1 Electrical properties of zinc oxide ceramics

[0023]

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Abstract

The invention relates to a method for preparing high conductivity zinc oxide ceramic through sintering in high pressure oxygen. The zinc oxide ceramic is prepared by taking zinc oxide as the main component added with aluminum oxide and gallium oxide through the steps of dispersing, grinding, smashing, pressing and sintering, wherein the sintering temperature is 700-900 DEG C, the carrier concentration of the sintered ceramic is 1.137*10<19>cm<-3>, the resistivity is 0.063(ohm?cm), the carrier mobility is 8.712cm<2>?V<-1>?s<-1>, and the heat conductivity is 32.171W / (m*K).

Description

technical field [0001] The invention relates to a method for preparing high-conductivity zinc oxide ceramics by sintering under a high-pressure oxygen atmosphere, belonging to the field of inorganic non-metallic materials. Background technique [0002] Conductive ceramic material refers to a new type of functional material with ion conduction and electron / hole conduction in ceramic materials. ZnO conductive ceramics have linear V-I characteristics and adjustable resistivity, and can be used as high-power linear resistors for neutral point grounding resistors in power transmission lines, which can pass considerable currents and withstand high energy. [1] Due to the intrinsic defects of ZnO, such as Zn occupying O sites (ZnO), interstitial zinc atoms (Zn I ) or oxygen vacancies (V O ) makes it deviate from the ideal stoichiometric ratio, and ZnO exhibits n-type conductivity at room temperature. In order to improve the conductivity of conductive ceramics, zinc oxide is often...

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/622
Inventor 黄瑾黄丰丁凯颜峰坡黄嘉魁吕佩文林钟潮
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI