Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10625612 | Ceramics International | 2013 | 5 Pages |
Abstract
(1âx)BaTiO3-xBi0.5Na0.5TiO3 (BT-BNT) ceramics were prepared by the solid-state reaction method. With an increase of BNT content, both the Curie temperature and the room temperature resistivity increased. At 1 mol% BNT addition, the sample was not semiconducting, due to Bi2O3 volatilization resulting from the decomposition of pre-calcined BNT during sintering. Appropriate extra Nb2O5 doping in the raw materials could offset Bi2O3 volatilization and neutralize the redundant acceptor Na+ ions. When the extra Nb2O5 content was 0.6 mg, the sample room-temperature resistivity was 6.3Ã103 Ω cm, with the Curie point about 135 °C and a high PTC effect of â¼3 orders of magnitude.
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Authors
Hailong Li, Jianning Kang, Feng Guo, Yuanfang Qu, De'an Yang,