人工晶体学报2017，Vol.46Issue(11)：2107-2114,8.
CaO对MgO-Al2O3-SiO2系微晶玻璃结构与性能的影响
Effect of CaO on Structure and Properties of MgO-Al2O3-SiO2 System Glass Ceramics
摘要
Abstract
MgO-Al2O3-SiO2 (MAS)-based glass ceramics were prepared by melting method with pure chemical reagents.The effects of CaO content on crystallization behavior、phase composition、microstructure、physical and chemical properties of glass ceramics were investigated by DSC,XRD,SEM,and performance testing methods.The results show that a certain content of CaO could reduce the activation energy of crystallization,which as a result can promote the glass crystallization;On the other hand,with the increase of CaO,the main crystal phase transfers from sapphirine to α-cordierite,crystal morphology from rod like crystal into dendrite,the grain size decreases at first and then increases;with the addition of 3wt％ CaO,the thermal expansion coefficient and the relative dielectric (εr) of glass ceramics show the lowest value,are 3.89 × 10-6℃-1 and 10.09 (1 MHz),respectively;the Vickershardness of samples reach the maximum when no CaO is added,is 10.52 GPa.关键词
CaO/α-堇青石/热膨胀系数/介电性能Key words
calcium oxide/α-cordierite/thermal expansion coefficient/dielectric property分类
化学化工引用本文复制引用
殷哲一,张雪峰,邓磊波..CaO对MgO-Al2O3-SiO2系微晶玻璃结构与性能的影响[J].人工晶体学报,2017,46(11):2107-2114,8.基金项目
内蒙古创新引导奖励资金项目(4140300501) （4140300501）
