八种新功能晶体的比热及其与相变掺杂物关系的实验研究  

Experimental Research on Specific Heat of Eight New Functional Crystals and Relations to Phase Transition and Dopant

作　　者：徐一斌 奚同庚[1] 段炼[1] 陆昌伟[1] 李明华[1] 费扬[1] 蔡忠龙[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,香港中文大学物理系

出　　处：《无机材料学报》1994年第1期15-21,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金

摘　　要：本文对八种新型功能晶体Ｌｉ２Ｂ４Ｏ７、Ｂｉ１２ＴｉＯ２０、Ｂｉ１２ＧｅＯ２０、Ｂ１４Ｇｅ３Ｏ１２、Ｓｒ１－ｘＢａｘＮｂ２Ｏ６（ｘ＝０．３３，０．４８）、ＬｉＴａＯ３等在１３０～９７３Ｋ范围内的比热行为及其与相变、组分之间的关系进行了实验研究，给出了比热的多项式拟合方程，并与用纽曼－卡普定律及用Ｗｉｋｅｌｍａｎｎ经验方程的比热计算值作了对比，为晶体比热的估算提供了依据和方法．In this paper, we report the specific heat of eight new functional crystals: Li2B4O7, Bi12SiO20,Bi12TiO20, Bi12GeO20, Bi4Ge3O20, Sr1-xBaxNb2O6(x=0.33, 0.48), LiTaO3 in the temperature range of 130～973K, together with the relations to phase transition and chemical components. The polynomial fitting equations of sp. heat are given. The results are also compared with the calculated values from Kopp- Neumann law and Winkelmann's empirio equation. This has provided a method and evidence for the estimation of crystal's specific heat.

关 键 词：比热 晶体 相变 

分 类 号：O792[理学—晶体学]