热力学家PbFe-= =SUB - 5-= -Nb-= =SUB - 5-= =SUB - 5-= =SUB -3-= =SUB

Физика твердого тела Pub Date : 2023-01-01 DOI:10.21883/ftt.2023.03.54754.562

С. Н. Каллаев, А. Г. Бакмаев, З. М. Омаров

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引用次数: 0

摘要

研究了铁电体PbFe0.5Nb0.5O3在300 ~ 800 K范围内的热物理性质。在弥漫性铁电跃迁Tc~380 K区、Burns温度Td~670 K区和中间温度T^*~470 K区发现了热容和热扩散的异常。具有纳米极结构的铁电体中主要声子传热机制。

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Теплофизические свойства и фазовые переходы сегнетоэлектрика PbFe-=SUB=-0.5-=/SUB=-Nb-=SUB=-0.5-=/SUB=-O-=SUB=-3-=/SUB=- в области высоких температур

The thermophysical properties of the ferroelectric PbFe0.5Nb0.5O3 in the temperature range 300–800 K are studied. Anomalies in the heat capacity and thermal diffusion are found in the region of the diffuse ferroelectric transition Tc~380 K, the Burns temperature Td~670 K, and the intermediate temperature T^*~470 K. The dominant phonon heat transfer mechanisms in a ferroelectric with a nanopolar structure.

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Физика твердого тела

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