CaO掺杂对钡硼硅系微晶玻璃性能的影响  

Effect of CaO Doping on Properties of BaO-B_2O_3-SiO_2 Glass-ceramics

作　　者：唐波[1] 李波[1] 徐明江[1] 

机构地区：[1]电子科技大学微电子与固体电子学院,成都610054

出　　处：《硅酸盐通报》2014年第8期2016-2020,共5页Bulletin of the Chinese Ceramic Society

基　　金：国防基础科研计划资助(A1420110097)

摘　　要：本文采用固相法制备了具有高热膨胀系数的BaO-B2O3-SiO2(BaBSi)系微晶玻璃。CaO部分替代BaO的掺杂方法制备BaBSi系微晶玻璃,研究CaO掺杂对微晶玻璃性能的影响。通过SEM、XRD和DSC对微晶玻璃材料的热、力和电学性能的分析表明:随着CaO掺杂含量的增加,微晶玻璃中方石英晶相含量显著减少,而石英晶相含量明显增加;随着CaO掺杂含量的增加,微晶玻璃的抗弯强度呈现减小的变化趋势,微晶玻璃的热膨胀系数也在一定范围内变小,同时微晶玻璃的热膨胀系数随温度的变化更趋于线性化,更加优化了微晶玻璃的热学性能。在950℃的烧结温度条件下,CaO掺杂量为8%(质量分数)时制备的微晶玻璃具有良好的综合性能,高热膨胀系数(12.51×10-6/℃),高抗弯强度(170 MPa),低介电常数(6.2)及低介电损耗(0.06%)。BaO-B203-SiO2 glass-ceramic with high thermal expansion behavior were prepared by a solid- state method. In this paper, preparation BaBSi System Glass by the doping methods of using CaO replacing part of BaO to research the effect of CaO doping on the properties of BaO-B203-SiO2 glass- ceramic. The glass-ceramic sample were analyzed by scanning electron microscope, X-ray diffractometer and differential scanning calorimetry. The results show that as the CaO doped content increases, the cristobalite phase of glass-ceramic content reduced significantly, the quartz crystal phase content increased significantly ; the thermal, mechanic, electric properties of glass-ceramic show than as the CaO doped content increases, the bending strength of the glass-ceramic gradually decrease, the thermal expansion coefficient gradually decrease slightly in certain range, the thermal expansion coefficient changes with temperature tend to be more linear, more optimized the thermal properties of glass-ceramic. When CaO doped content is 8%, BaO-B2O3-SiO2 glass ceramics sintered at 950℃ have very well performances： higher thermal expansion coefficient （ 12.51 ×10^-6/℃ ）, higher bending strength （ 170 MPa）, lower relative dielectric constant （6.2）, and lower dielectric loss （0.06%）.

关 键 词：钡硼硅 热膨胀系数 微晶玻璃 石英 方石英 

分 类 号：TQ173[化学工程—搪瓷工业]