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首页> 外文期刊>CERAMICS INTERNATIONAL >Temperature dependence of macroscopic and microscopic PZT properties studied by thermo-mechanical analysis, dielectric measurements and X-ray diffraction
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Temperature dependence of macroscopic and microscopic PZT properties studied by thermo-mechanical analysis, dielectric measurements and X-ray diffraction

机译:通过热机械分析,介电测量和X射线衍射研究了宏观和微观PZT特性的温度依赖性

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摘要

The main objective of the paper is to point out the influence of composition and of poling state (poled and unpoled samples) on the evolution of various parameters (epsilon_r, dilatation coefficients, lattice parameters) at different scales (lattice, bulk) using X-ray diffraction (XRD), thermomechanical analysis (TMA) and dielectric methods. The transition temperatures have been determined from the above measurements and compared. The composition has an influence on the transition temperature and not on the dilatation coefficient value. The poling state influences only the macroscopic dilatation evolution and not the value of the transition temperature. A scale effect is only observed on majoritary tetragonal compositions which show different values of transition temperatures from microscopic and macroscopic methods.
机译:本文的主要目的是指出使用X-可以看出组成和极化状态(极化和非极化样本)对不同尺度(晶格,体积)各种参数(ε_r,膨胀系数,晶格参数)演变的影响。射线衍射(XRD),热机械分析(TMA)和介电方法。由上述测量确定了转变温度并进行了比较。组成对转变温度有影响,而对膨胀系数值没有影响。极化状态仅影响宏观膨胀演变,而不影响转变温度的值。仅在主要的四方组合物上观察到了尺度效应,该组合物从微观和宏观方法显示出不同的转变温度值。

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