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Microstructure and Nonohmic Properties of ZnO-V 2 O 5 Ceramics
The microstructure and nonohmic characteristics of polycrystalline ZnO-V 2 O 5 ceramics with V 2 O 5 as the only additive ranging from 0 to 2 mol% were investigated. An abnormal grain growth was observed for ZnO doped with V 2 O 5 and sintered at 900° C. However, the non-uniformity of the grain stru...
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| Published in: | Japanese Journal of Applied Physics 1995-12, Vol.34 (12R), p.6452 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
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| Summary: | The microstructure and nonohmic characteristics of polycrystalline ZnO-V
2
O
5
ceramics with V
2
O
5
as the only additive ranging from 0 to 2 mol% were investigated. An abnormal grain growth was observed for ZnO doped with V
2
O
5
and sintered at 900° C. However, the non-uniformity of the grain structure alleviated with increasing the V
2
O
5
content or sintering temperature. The ZnO-V
2
O
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
2
O
5
ceramics depended strongly on the processing conditions and V
2
O
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. |
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| ISSN: | 0021-4922 1347-4065 |
| DOI: | 10.1143/JJAP.34.6452 |