节点文献
Sr1.95Ca0.05NaNb5O15晶体的介电、热电和热学性质
DIELECTRIC,PYROELECTRIC AND THERMAL PROPERTIES OF Sr1.95 Ca0.05 NaNb5O15 CRYSTALS
【摘要】 用差示扫描量热法研究了Sr1.95Ca0.05NaNb5O15(SCNN)晶体的热学性质,测得其铁电-顺电相变的转变热△Q=3.68×103J/mol.DSC分析表明,晶体的铁电。铁弹相变不会引起比热反常.介电和热电测量结果证实了SCNN晶体存在低温铁电-铁电相变,其相变温度在85K以上。
【Abstract】 Thermal properties of SCNN have been investigated by using differential scanning calorimetery. The heat of ferroelectric-paraelectric transition △Q=3.68×10~3J/mol. The DSC curve indicates that the ferroelectric-ferroelastic phase transition will not lead to specific heat anomaly. Dielectric and pyroelectric measurements reveal that SCNN crystal has a low temperature ferroelectric-ferroelectric phase transition and the temperature range of the transition is above 85K.
【关键词】 Sr1.95Ca0.05NaNb5O15晶体;
相变;
转变热;
热电性;
【Key words】 Sr1.95Ca0.05NaNb5O15 crystal; phase transition; heat of transition; pyroelectricity;
【Key words】 Sr1.95Ca0.05NaNb5O15 crystal; phase transition; heat of transition; pyroelectricity;
- 【文献出处】 山东大学学报(自然科学版) ,Journal of Shandong University , 编辑部邮箱 ,1993年03期
- 【被引频次】4
- 【下载频次】51