热膨胀法测定玻璃热性能的应用评估  

Application Evaluation of Thermal Expansion Method for Measuring Glass Thermal Properties

作　　者：柏晓强 曹国荣 邢文忠 章林 洪秀成 赵刚 BAI Xiaoqiang;CAO Guorong;XING Wenzhong;ZHANG Lin;HONG Xiucheng;ZHAO Gang(Jushi Group Co.,Ltd.,Tongxiang 314500,China)

机构地区：[1]巨石集团有限公司,桐乡314500

出　　处：《玻璃》2024年第1期19-23,共5页Glass

摘　　要：热膨胀法可以测定玻璃的热性能,包括:热膨胀系数α与应变点T_(st)、转变点T_(g)、退火点T_(a)、膨胀软化点T_(d)等特征温度点。对热膨胀法测定玻璃热性能的应用进行评估,评估结果表明:(1)玻璃的热膨胀系数α会随着温度段变化而变化,同时在一定范围内,升温速率越大,热膨胀系数越小;(2)热膨胀法测定玻璃特征温度点的重复性偏差在±10℃以内,一定范围内,升温速率越大,特征温度点温度越高;(3)热膨胀法测定玻璃热性能的升温速率优选3℃/min;(4)玻璃中B_(2)O_(3)含量越高,同时CaO含量越低,那么玻璃的热膨胀系数α越小,玻璃的应变点T_(st)与转变温度T_(g)越小,退火加工温度范围也就越大。Thermal expansion method can measure glass thermal properties,including coefficient of thermal expansionαand Characteristic temperature points such as strain point T_(st),transition point T_(g),annealing point Ta,expansion softening point T_(d),etc.The evaluation of the application in measuring glass thermal properties using thermal expansion method shows that:(1)Thermal expansion coefficient a of glass will change with temperature changes,and within a certain range,the larger the heating rate,the smaller the coefficient of thermal expansion;(2)The repeatability deviation of thermal expansion method for measuring the characteristic temperature points of glass is within±10℃.Within a certain range,the higher the heating rate,the higher the characteristic temperature point temperature;(3)The optimal heating rate for measuring thermal properties of glass using thermal expansion method is 3℃/min;(4)The higher the B_(2)O_(3)content and the lower the CaO content in glass,the higher the thermal expansion coefficientαof glass,the smaller the strain point T(st)and transition point Tg of glass,the larger the annealing temperature range.

关 键 词：玻璃 热膨胀系数 玻璃转变点 膨胀软化点 退火 

分 类 号：TQ171[化学工程—玻璃工业]