Solid solution Pb1−xSrxTiO3 and its thermal expansion
Solid solution Pb1−xSrxTiO3 and its thermal expansion
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DOI：
10.1016/s0925-8388(03)00345-1
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发表时间：
2003-10
影响因子：
6.2
通讯作者：
X. Xing;Jun Chen;J. Deng;Gui-rong Liu
中科院分区：
文献类型：
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作者：
X. Xing;Jun Chen;J. Deng;Gui-rong Liu
在室温（RT）下，在0≤x≤1.0的组成范围内确定了Pb1−xSrxTiO3的固溶极限。这些相被分离并索引为四方晶系（x<0.5）和立方晶系（x≥0.5）。 Pb1−xSrxTiO3 的晶胞参数随溶解度 x 连续但非线性地变化。通过高温X射线粉末衍射获得了固溶体化合物Pb1−xSrxTiO3(x=0, 0.15, 0.20, 0.50, 0.90, 1.0)在RT至1173 K温度范围内的本征热膨胀。在居里点以下发现 Pb1−xSrxTiO3(x=0, 0.15, 0.20) 的负热膨胀系数。这些钛酸盐陶瓷的热膨胀与固溶体 Pb1−xSrxTiO3 中的溶解度高度相关。
The solid solution limit of Pb1−xSrxTiO3was determined in the composition range of 0≤x≤1.0 at room temperature (RT). The phases were isolated and indexed in a tetragonal system with x<0.5 and in a cubic one with x≥0.5. The cell parameters of Pb1−xSrxTiO3continuously, but nonlinearly, change with solubility x. The intrinsic thermal expansions of the solid solution compounds Pb1−xSrxTiO3(x=0, 0.15, 0.20, 0.50, 0.90, 1.0) were obtained in the temperature range from RT to 1173 K with high-temperature X-ray powder diffraction. Negative thermal expansion coefficients of Pb1−xSrxTiO3(x=0, 0.15, 0.20) were found below the Curie points. The thermal expansions of these titanate ceramics were highly correlated with the solubility in the solid solution Pb1−xSrxTiO3.