摘要
用BaO-Al2O3-B2O3-SiO2玻璃与二氧化硅复合的方法制备了高膨胀系数低温共烧陶瓷。实验首先制备一组玻璃材料,通过热膨胀测试、DTA等方法研究了玻璃的热学性能,然后用玻璃与石英、方石英和鳞石英晶体按一定比例复合制得高膨胀低温共烧陶瓷。通过烧结试验、XRD等分析方法研究了复相陶瓷材料的烧结收缩性能、晶相组成、热膨胀系数和介电常数。结果表明:50%BaO-7.5%Al2O3-30%B2O3-12.5%SiO2玻璃具有较低的转变温度(520℃)。该玻璃与鳞石英晶体以1:1的比例复合,850℃/10min烧结可以获得热膨胀系数为12.18×10-6K-1、介电常数为5.37的低温共烧陶瓷。
Low temperature co -fired ceramics were fabricated by incorporation of BaO-Al2O3-B2O3-SiO2 glass with silica. The glasses were firstly prepared to study the thermal properties by thermal expansion test and differential thermal analysis. The results showed that the 50% BaO -7.5% Al2O3 - 30% B2O3 -12.5% SiO2 （in mole）glass represented the lowest transformation temperature （520℃）, which would effectively decrease the sintering temperature of glass/ceramic composites. The glass was further incorporated with silica to prepare glass/ceramic composites. The shrinkage behavior, crystalline phases, coefficient of thermal expansion and dielectric constant of the composite were investigated by sintering experiments, XRD and so on. The results revealed that the glass/tridymite composite at the ratio of 1：1 possessed the lower sintering temperature （at 850℃ for 10min） , higher coefficient of thermal expansion （12.18 × 10^-6K^-1） and lower dielectric constant （5.37）.
出处
《玻璃与搪瓷》
CAS
2011年第2期1-6,共6页
Glass & Enamel
