Temperature dependence of piezoelectric, elastic and dielectric coefficients at radial resonance of piezoceramics with an Aurivillius-type structure
Temperature dependence of piezoelectric, elastic and dielectric coefficients at radial resonance of piezoceramics with an Aurivillius-type structure
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DOI：
10.1109/tuffc.2005.1428038
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发表时间：
2005-05
期刊：
影响因子：
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通讯作者：
Alberto Moure;C. Alemany;Lorena Pardo
中科院分区：
文献类型：
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作者：
Alberto Moure;C. Alemany;Lorena Pardo
Aurivillius型结构化合物由于具有较高的铁电-顺电相变温度而被认为是高温压电材料的理想候选者。尽管如此，很少有论文发表在预期的工作温度下的压电性能的研究。本文采用自动迭代法研究了（SrBi/sub 2/Nb/sub 2/O/sub 9/）/sub 0.35/（Bi/sub 3/TiNbO/sub 9/）/sub 0.65/[SBN/BTN 35/65]陶瓷薄片从室温到铁电-顺电相变的压电、机电和弹性性能。通过烧结或通过机械活化的前体的热压后的再结晶来制备陶瓷。通过这种新的方法，获得了具有可控织构和显微结构的陶瓷。讨论了在整个压电活性温度范围内，工艺路线对陶瓷性能的影响。在500/spl deg/C下，d/sub 31/=2.1 pC/N和k/sub p/=2.9%的值得以实现。
Aurivillius-type structure compounds are considered good candidates for piezoelectric materials at high temperature, due to their high ferro-paraelectric phase transition temperature. Despite this fact, very few papers have been published on the study of piezoelectric properties at the expected working temperatures. An iterative automatic method has been used in this work to characterize the piezoelectric, electromechanical, and elastic properties at radial resonance of thin ceramic disks with composition (SrBi/sub 2/Nb/sub 2/O/sub 9/)/sub 0.35/(Bi/sub 3/TiNbO/sub 9/)/sub 0.65/[SBN/BTN 35/65], from room temperature up to the ferro-paraelectric phase transition. Ceramics were prepared by sintering or by recrystallization after hot-pressing of mechanically activated precursors. By this new method, ceramics with controlled texture and microstructure are obtained. The influence of the processing route in the properties of the ceramics, over the whole temperature range of piezoelectric activity, is discussed. Values of d/sub 31/=2.1 pC/N and k/sub p/=2.9% at 500/spl deg/C are achieved.