| Thermal Stability and Humidity Resistance of ScTaO4 Modified （K0.5Na0.5）NbO3 Ceramics |
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| 引用本文： | 郑立梅,王矜奉,王春明,吴清早,臧国忠.Thermal Stability and Humidity Resistance of ScTaO4 Modified （K0.5Na0.5）NbO3 Ceramics[J].中国物理快报,2009(12):232-235. |
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| 作者姓名： | 郑立梅 王矜奉 王春明 吴清早 臧国忠 |
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| 作者单位： | [1]School of Physics, Shandong University, Jinan 250100 [2]China Shipbuilding Industry Corporation, No. 726 Institution, Shanghai 201108 [3]School of Material Science and Engineering, Liaocheng University, Liaocheng 252059 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 50802038 and 50902087, the Specialized Research Fund for the Doctoral Program of Higher Education of China under Grant Nos 20070422059 and 20080422003, the Outstanding Youth Scientist Research Foundation of Shandong Province under Grant No 2008BS04002, and the China Postdoctoral Science Foundation under Grant No 20080431199. |
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| 摘 要： | Lead-free （Na0.5K0.5）NbO3-xmol% ScTaO4 （x=0-1.5） ceramics are prepared using the conventional solid-state reaction method and their properties are investigated in detail. The results indicate that the piezoelectric properties and density are improved by the introduction of ScTaO4. Due to the high orthorhombic-tetragonal phase transition temperature TO-T （around 200°C）, stable piezoelectric properties against temperature are obtained. In a wide temperature range of 15-160°C, kp of the （Na0.5K0.5）NbO3-0.5mol% ScTaO4 ceramic remains almost unchanged and d31 increases slightly from 59pC/N to 71pC/N. The deliquescent problem is effectively solved by the addition of ScTaO4. The piezoelectric properties of ScTaO4 modified （Na0.5K0.5）NbO3 ceramics show no obvious reduction and dielectric loss increases slightly after 120h of immersion. From the analysis, it is suggested that the density is an important factor that improves the humidity resistance of the specimens.
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| 关 键 词： | 陶瓷电阻 热稳定性 改性 湿度 压电性能 固相反应 相变温度 温度稳定 |
Thermal Stability and Humidity Resistance of ScTaO4 Modified （K0.5Na0.5）NbO3 Ceramics |
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| ZHENG Li-Mei,WANG Jin-Feng,WANG Chun-Ming,WU Qing-Zao,ZANG Guo-Zhong.Thermal Stability and Humidity Resistance of ScTaO4 Modified （K0.5Na0.5）NbO3 Ceramics[J].Chinese Physics Letters,2009(12):232-235. |
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| Authors: | ZHENG Li-Mei WANG Jin-Feng WANG Chun-Ming WU Qing-Zao ZANG Guo-Zhong |
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| Affiliation: | 1School of Physics, Shandong University, Jinan 250100;2China Shipbuilding Industry Corporation, No. 726 Institution, Shanghai 201108;3School of Material Science and Engineering, Liaocheng University, Liaocheng 252059) |
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