氧化碲单晶热膨胀行为的实验研究  

EXPERIMENTAL STUDIES ON THE THERMAL EXPANSION BEHAVIOUR OF SINGLE CRYSTAL TELLURIUM DIOXIDE LU CHANGWEI XI TONGGENG

作　　者：陆昌伟[1] 奚同庚[1] 陈云仙[1] 杨雪华[1] 徐一斌 浦志芬 

机构地区：[1]中国科学院上海硅酸盐研究所

出　　处：《应用科学学报》1994年第2期95-100,共6页Journal of Applied Sciences

基　　金：国家自然科学基金

摘　　要：用热膨胀仪（Ｄｉｌａｔｏｍｅｔｅｒ）、热综合分析仪（Ｔｇ－ＤＴＡ）、Ｘ射线衍射仪（ＸＲＤ）对ＴｅＯ＿２单晶的热膨胀行为进行了实验研究。首次报道了用顶杆法测定３７０～５００℃、沿α和ｃ轴向的ＴｅＯ＿２单晶热膨胀系数α＿α和α＿ｃ；用Ｔｇ－ＤＴＡ法测定ＴｅＯ＿２的熔点并对其热膨胀系数和熔点的关系作了讨论；还从ＴｅＯ＿２单晶的晶体结构和解理特性以及α轴和ｃ轴的化学键键强比较对其热膨胀的各向异性行为作了进一步探讨。In this paper,the thermal expansion behaviour of the TeO_2 single erystal isstudied experimentally by the push-rod dilatometery Tg-DTA and X-Ray diffrac-tion methods.It is the first time to measure the thermal expension coefficient ofthe TeO_2 single crystal along a and c axes in the temperature region of 370～500℃by the push-rod dilatometer method.Furthermore,the anisotropy of the thermalexpansion of the TeO_2 single crystal is studied according to the structure and thecharacteristic of cleavage as well as the comparison of the chemical bonding stre-ngth of a and c axes.

关 键 词：单晶 热膨胀 晶体结构 熔点 氧化碲 

分 类 号：O613.53[理学—无机化学]