Microcalorimetry studies of phase transitions in (BaxSr1−x)TiO3
作者:M. Radecka、M. Rekas
DOI:10.1007/s10973-006-8131-z
日期:2007.6
Both temperatures, T C, (T C —Curie temperature) and heat of the phase transition: ferroelectric-paraelectric, ΔH, in the BaxSr1−xTiO3 materials have been studied by means of the microcalorimetric method. The determined parameters were verified by either temperature dependence of the dielectric permittivity (Curie-Weiss law) or thermodynamic method. The effect of strontium content on T C has been discussed. It was found that microcalorimetry is useful tool studying phase transition phenomena in ferroelectric perovskites.
通过微量热法研究了 BaxSr1-xTiO3 材料中的温度 T C(T C - 居里温度)和相变热量:铁电-准电 ΔH。所确定的参数通过介电常数的温度依赖性(居里-魏斯定律)或热力学方法进行了验证。讨论了锶含量对 T C 的影响。研究发现,微量热法是研究铁电包晶石相变现象的有用工具。
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