热处理时间对阳极键合用微晶玻璃性能的影响

Effects of Heat-treatment Time on Performance of Glass-ceramics Used as Anodic Bonding Materials

实验采用Li2O-ZnO-SiO2(LZS)系统微晶玻璃代替传统的耐热玻璃,在前期工作的基础上对该微晶玻璃的热处理时间进行了系统研究,通过相关的测试手段,分析讨论了热处理时间对主晶相、晶粒尺寸大小、析晶程度及其相关性能的影响。实验结果表明:样品的主晶相为Li2SiO3,热处理时间控制在4—9 h,能获得较好的性能,最佳热处理时间为9 h,即核化时间4.5 h,晶化时间4.5 h。样品的热膨胀系数随热处理时间的增加而增大,最大可达131.6×10-7/℃。样品具有良好的抗酸碱腐蚀性能,其最大抗折强度为95.91 MPa。

Glass-ceramics had the characteristics of low cost, high strength, good acid and alkali resistant capability and the coefficient of thermal expedition could be adjusted widely. It could be used as bonding material. Now, the glass-ceramics of Li2O-ZnO-SiO2（LZS）system was chose to replace the traditional hot-resistant glass. On the basis of previous work, nucleation time and crystallization time of the Glass-ceramics were researched. XRD, SEM and other test methods were used to measure the performances of the Glass-ceramics. The results showed that a main crystalline phase was Li2SiO3, the suitable heat - treatment time was 4 hours to 9 hours. Following the increasing of temperature, the coefficient of thermal expedition was increased, The tiptop of it was 131.6 × 10^-7/℃ and the most bending strength was 95.38 MPa.