作　　者： ; ;

机构地区： 华南理工大学材料科学与工程学院无机材料科学与工程系

出　　处： 《工程热物理学报》 1996年第S1期86-89,共4页

摘　　要： 铌锑酸铅系压电陶瓷材料的导温和导热性能研究吴清仁，刘振群（华南理工大学无机材料科学与工程系广州５１０６４１）关键词导温系数，导热系数，相变，压电陶瓷，闪光法１引言压电陶瓷材料的发现尽管只有几十年，但从ＢａＴｉＯ３（ＢＴ）系到ＰｂＺｒＯ。－ＰｂＴＩＯ。... The thermophysical properties of piezoelectric ceramic are of much practical and theoretical interest. Many of the physical properties of these materials have been widely studied. However, their thermal diffusities and conductivities at high temperature, which are very important in many applications, have scarcely been measured. In this paper, the measurement of thermal diffusivity and conductivity of Pb(Sb 1/2Nb1/2)O3-PbZrO3-PbTiO3 by using the laser flash method is described, and the effect of the temperature, phase transition and polarization treatment on the thermophysical properties is studied. By' the experimental results, it can be seen from the curves that there are sudden changes in the thermophysical properties due to phase transitions, and its thermal diffusivity and conductivity decrease with the increase of polarization voltage. The phase transition temperatures (Cuire points)determined from the discontinuity on the thermophysical properties curves have been found to be in good agreement with the values measured by the electric method.

关 键 词： 导温系数 导热系数 相变 压电陶瓷 闪光法

领　　域： [一般工业技术]