Microstructure and Nonohmic Properties of ZnO-V_2O_5 Ceramics
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概要
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The microstructure and nonohmic characteristics of polycrystalline ZnO-V_2O_5 ceramics with V_2O_5 as the only additive ranging from 0 to 2 mol% were investigated. An abnormal grain growth was observed for ZnO doped with V_2O_5 and sintered at 900℃. However, the non-uniformity of the grain structure alleviated with increasing the V_2O_5 content or sintering temperature. The ZnO-V_2O_5 ceramics have shown characteristics of nonohmic V-I behavior and large apparent dielectric constant with a relaxation peak of 0.36 eV at 300 kHz. The electrical properties of these ZnO-V_2O_5 ceramics depended strongly on the processing conditions and V_2O_5 content, and there seems a close relation between the nonlinear electric properties and the concentration of the deeply-trapped defects at 0.36 eV in ZnO.
- 社団法人応用物理学会の論文
- 1995-12-15
著者
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Wu Tai-bor
Department Of Material Science And Engineering National Tsing Hua University
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Tsai Jyh-kuang
Department Of Materials Science And Engineering National Tsing Hua University
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