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材料工程  2008 

Y2O3掺杂(Bi0.5Na0.5)0.94Ba0.06TiO3无铅压电陶瓷的研究

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Keywords: 无铅压电陶瓷,掺杂,介电性能,弛豫特性

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Abstract:

采用固相合成法制备了Y2O3掺杂(Bi0.5Na0.5)0.94Ba0.06TiO3无铅压电陶瓷。研究了Y2O3掺杂对(Bi0.5Na0.5)0.94Ba0.06TiO3陶瓷晶体结构、介电与压电性能的影响。XRD分析表明,在所研究的组成范围内陶瓷均能够形成纯钙钛矿固溶体。介电常数-温度曲线显示陶瓷具有弛豫铁电体特征,陶瓷的弛豫特征随掺杂的增加更为明显。在Y2O3掺杂量为0.5%时陶瓷的压电常数d33分别为137pC/N,为所研究组成中的最大值,掺杂量为0.1%时,机电耦合系数kp与kt最大值为0.30,0.47。

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