Preparation of Cristobalite and It’s Thermal Characteristics  

作　　者：YAN Yin ZHOU Yongheng 

机构地区：[1]Laboratory of Nanophotonic Functional Materials and Devices,South China Normal University

出　　处：《矿物学报》2013年第S1期122-122,共1页Acta Mineralogica Sinica

基　　金：Project supported by the State Key Program of National Natural Science of China(No. 41130746)

摘　　要：The thermal characteristic of cristobalite plays an important role in the application of casting industry. Because the phase transition of silica glass and cristobalite has low volume change, the block cristobalite had been manufactured by calcining fused silica ceramic, the XRD, SEM and thermal characteristics of the cristobalite had been tested. The result shows the formation of porous structure in the block cristobalite, and thermal expansion rate of the phase transition of β/αcristobalite reaches 1.5% at the temperature range of 250-290 ℃.The thermal characteristic of cristobalite plays an important role in the application of casting industry. Because the phase transition of silica glass and cristobalite has low volume change, the block cristobalite had been manufactured by calcining fused silica ceramic, the XRD, SEM and thermal characteristics of the cristobalite had been tested. The result shows the formation of porous structure in the block cristobalite, and thermal expansion rate of the phase transition of β/αcristobalite reaches 1.5% at the temperature range of 250-290 ℃.

关 键 词：CRISTOBALITE THERMAL EXPANSION FUSED SILICA CERAMIC 

分 类 号：TD985[矿业工程—选矿]