Preparation method of low-resistivity zinc oxide ceramic material

A technology of ceramic materials and zinc oxide, which is applied in the field of preparation of zinc oxide ceramic materials, can solve problems such as application limitations, poor reliability, and low resistivity, and achieve the effects of improving surface integrity, increasing yield, and low resistivity

Inactive Publication Date: 2014-01-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0002] In recent years, due to the low resistivity and poor reliability of the general-purpose metal wire resistance elements in the past, the application in high power has been increasingly limited.

Method used

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  • Preparation method of low-resistivity zinc oxide ceramic material

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Embodiment Construction

[0015] The following table shows 7 low-resistance zinc oxide ceramic material samples obtained according to the technical solution of the present invention, and each sample corresponds to a specific embodiment.

[0016] In the table below, as in Example 2, the low-resistance ZnO ceramics prepared have a resistivity of 1Ω·cm and an energy density of 500-600J / cm 3 , the temperature resistance coefficient is 1.5×10 -2 Ω / ℃, the nonlinear coefficient is 1.07, and the relative density is 90% to 97%. As in Example 3, the prepared low-resistance ZnO ceramics have a resistivity of 5Ω cm and an energy density of 600-700J / cm 3 , the temperature resistance coefficient is 2×10 -2 Ω / ℃, the nonlinear coefficient is 1.02, and the relative density is 90% to 97%.

[0017]

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Abstract

The invention relates to a preparation method of a low-resistivity zinc oxide ceramic material, belonging to the technical field of electronic materials. The preparation method provided by the invention comprises the steps of taking four powder materials of ZnO, Al2O3, MgO and TiO2 as raw materials (CaO, SiO2, NaOH or KOH can also be added), and performing ball milling, granulation, forming and sintering to obtain the low-resistivity zinc oxide ceramic material, wherein the weight mixture ratio of the raw material components is that ZnO: Al2O3: MgO: TiO2 = (65-98): (1-15): (0-10): (0-10), and a sectional type sintering process under the condition of isolating an oxygen atmosphere is adopted during sintering. The process flow provided by the invention is simple and feasible, and is suitable for industrial production; the prepared low-resistivity zinc oxide ceramic material has the characteristics of low resistivity (which can achieve 10<-1> omega.cm), high energy density (which is higher than 500J / cm<3>), and good stability (the resistance temperature coefficient can achieve 10<-3> omega / DEG C, and the relative density is as high as 97%).

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and relates to a zinc oxide ceramic material, especially a preparation method of the zinc oxide ceramic material. Background technique [0002] In recent years, due to the low resistivity and poor reliability of the conventional metal wire resistance elements, the application in high power has been increasingly limited. Therefore, there is an urgent need for linear resistors that are small in size, light in weight, simple to manufacture, and capable of enduring high energy. ZnO conductive ceramic resistors came into being under this background. High-energy zinc oxide conductive ceramic resistor is a newly developed electrical component. It gives full play to the characteristics of easy manufacture and easy control of resistivity of zinc oxide ceramics. It can obtain a wide adjustable range of resistivity, high energy density and good linearity. Components, and its temperature coeff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622
Inventor 邓宏杨胜辉韦敏杨帆
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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