PMN-PT单晶淬火处理对介电性能的影响

功能材料, 2004, 35(z1): 1461-1463.

1.北京工业大学,材料学院,薄膜材料与技术研究室,北京,100022;同济大学,功能材料研究所,上海,200092

2.同济大学,功能材料研究所,上海,200092

3.同济大学,功能材料研究所,上海,200092

4.北京工业大学,材料学院,薄膜材料与技术研究室,北京,100022

The influence of quenching process on the dielectric character in single crystal PMN-PT

通过淬火处理可以使弛豫型PMN-PT单晶中一些应力集中的区域产生应力场致相变,在Td处产生宏畴,从而在温谱上Td处的介电峰强化.研究表明,经淬火处理单晶谐振极化所对应的低温介电行为受到压制,主介电峰变窄,峰值变高并稍向高温方向移动;频率弥散减弱,弛豫性变小.

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