镧掺杂Sr_(0.4)Ba_(0.6)TiO_3材料的导热性能

Preparation and thermal conduction performance of Sr_(0.4)Ba_(0.6)TiO_3 materials

研究了不同镧掺杂浓度下Sr0.4Ba0.6TiO3材料的导热性能,研究镧元素对其导热性能的影响,得到了不同掺杂量下钛酸锶钡材料的热导率,材料密度随烧结温度与成型压力的增加而增大;同时发现少量镧元素的掺杂,可以增加钛酸锶钡材料的热导率;当镧元素掺杂量较大时,降低了材料的热导率。钛酸锶钡材料的电子热导率随材料烧结温度的升高基本不变,声子热导率随材料烧结温度的升高而增加。

The effect of lanthanum doped on thermal conduction and thermal performance of Sr0.4Ba0.6TiO3 materials were studied in this paper.The thermal conductivities of barium strontium titanate(SBTi) materials were obtained at different lanthanum doped.The density of SBTi increased with the increasing of pressures,sintering temperature and lanthanum doped.It was shown that the lanthanum doped of small quantity(less 2.0%mol) resulted in increasing of thermal conductivities,the lanthanum doped of greater quantity(greater 2.0%mol) resulted in decreasing of thermal conductivities.The electron thermal conductivity of SBTi is a constant with sintering temperature increasing,and the phonon thermal conductivity increased with sintering temperature increasing.