SiO_(2)-B_(2)O_(3)-Bi_(2)O_(3)-CuO系统玻璃非等温析晶动力学  

Kinetic Behaviour of Non-isothermal Crystallization of SiO_(2)-B_(2)O_(3)-Bi_(2)O_(3)-CuO Glass

作　　者：郭宏伟[1] 刘磊 池龙兴 刘帅 李荣悦 白赟 童强 GUO Hongwei;LIU Lei;CHI Longxing;LIU Shuai;LI Rongyue;BAI Yun;TONG Qiang(College of Materials Science and Engineering,Shaanxi University of Science&Technology,Xi'an 710021,China;Department of Materials Science and Engineering,McMaster University,Hamilton L8S4L8,Canada)

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021 [2]麦克玛斯特大学材料科学与工程系,汉密尔顿L8S4L8

出　　处：《中国陶瓷》2021年第7期18-23,共6页China Ceramics

基　　金：国家“十三五”重点研发计划项目(2017YFB0310201-02);陕西省重点研发计划项目(2018KW-030)

摘　　要：采用高温熔体冷却法制备了Bi_(2)O_(3)-B_(2)O_(3)-SiO_(2)-CuO(SBBC)系统玻璃,利用X射线衍射仪,差示扫描量热仪,扫描电镜等,并借助Kissinger方程和Augis-Bennett方程研究SBBC系统玻璃的非等温析晶动力学和析晶热力学。结果表明:在热处理过程中玻璃产生了两种晶相:CuO和Bi_(12)SiO_(20);对应的活化能E_(P1)=50.1 kJ/mol,E_(P2)=116.4 kJ/mol;两种晶体的平均析晶指数p_(1)=3.7,p_(2)=3.2,表明所产生晶体均为体积成核,二维空间生长;其中当温度达到773.15 K时CuO晶体的析出可以自发进行,当温度达到793.15 K时Bi_(12)SiO_(20)晶体的析出可以自发进行。The Bi2O3-B2O3-SiO2-CuO(SBBC) system glasses were prepared via cooing the high temperature melt. The glasses were analyzed by X ray diffractometer, differential scanning calorimetry and scanning electron microscope. The non-isothermal crystallization kinetics and crystallization thermodynamics of glass were studied by using Kissinger equation and Augis-Bennett equation.The results showed that the glass of this component produced two main crystal phases in the process of heat treatment. There are CuO and Bi12 SiO20. The corresponding crystallizing activation energy EP1=50.1 kJ/mol and EP2=116.4 kJ/mol. The average crystal exponent of the two kinds of crystals is p1=3.7 and p2=3.2. The crystals produced are volume nucleation and grow in two-dimensional space.The precipitation of CuO crystal can be spontaneous at 773.15 K, and that of Bi12 Si O20 crystal can be spontaneous at 793.15 K.

关 键 词：差示扫描量热法 微晶玻璃 非等温析晶动力学 

分 类 号：TQ174.14[化学工程—陶瓷工业]