摘要
本文研究了热处理工艺过程对SiO2-Al2O3-MgO-F系玻璃陶瓷析出晶体的影响。结果表明:随着过渡相析出时间的延长,云母晶体数量逐渐减少,而所占体积百分数却逐渐增高;析晶温度的提高有利于云母晶体的形核和生长;随着析晶时间的延长,云母晶体逐渐长成片状,云母晶体的长度、厚度及体积百分数逐渐增大,但时间过长这种趋势变化不大。对第二相粒子而言,热处理过程对形核有较大的影响,而对最终的尺寸影响不大。
The influences of crystallization temperatures,crystallization times and transient phases’precipitation times on the microstructures of glass-ceramics in the SiO 2 -MgO-Al 2 O 3 -F glass system were investigated.The results showed that the prolonging of transient phases’precipitation time decreased the number of mica,but increased the crystal’s volume fraction;the higher temperature was benefited to nuclei and crystallization of mica;with the prolonging of crystallization holding time,the length and depth and volume fraction of mica crystalline gradually increased.However,the processes have much less influences on second phase than that of mica.
出处
《中国陶瓷》
CAS
CSCD
2003年第5期5-7,4,共4页
China Ceramics
