添加剂对铅硼低温封接玻璃性能影响的研究

发布时间：2018-03-19 18:18

  本文选题：添加剂　切入点：封接玻璃　出处：《天津大学》2015年硕士论文　论文类型：学位论文

【摘要】：封接玻璃是一种新兴封接材料,因其具有良好的封接性能、化学稳定性及高的机械强度,使其应用范围很广泛。低温封接玻璃较普通的封接玻璃具有更低的熔点,能够在较低的温度环境下产生液相,提高封接质量。含铅封接玻璃作为最成功的低温封接玻璃被应用于许多领域。本文选用了具有较低软化点的PbOB_2O_3体系做为封接玻璃的基础体系,并探索了不同种添加剂对铅硼玻璃性能的影响。实验最终得到了熔点较低,综合性能良好的铅硼基封接玻璃。对于铅硼玻璃基体,当PbO含量为77wt.%时,玻璃的初始熔化温度达到最低点,为465℃,热膨胀系数为11.41×10-6K-1,碱腐蚀质量损失为7.31%。实验又分别通过引入Sn,Bi_2O_3,ZnO,MgO以及CaF_2等添加剂及其符合添加探索了添加剂对铅硼低熔玻璃性能的影响。通过实验发现,单质Sn和CaF_2降低玻璃初始熔化温度的作用十分明显,使玻璃的初始熔化温度分别降到了425℃和410℃,但玻璃的稳定性不够好,有SnO_2和CaF_2晶体析出。Bi_2O_3的加入没有明显的降低初始熔化温度的效果,玻璃的初始熔化温度为445℃。但是Bi_2O_3可以有效提高玻璃的流动性,在流动性测试中,熔化后玻璃“纽扣”的直径增长百分比达到107.9%,同时,玻璃的耐腐蚀性得到极大提高,质量损失为0.92%。ZnO和MgO的复合添加使得玻璃的初始熔化温度降低到400℃,流动性测试直径增长比为80.77%,耐腐蚀质量损失为2.4%,玻璃的综合性能良好。复合添加实验得到初始熔化温度最低的玻璃体系为PbOB_2O_3-ZnO-MgO-CaF_2体系,初始熔化温度为395℃,热膨胀系数为11.76×10-6K-1,耐腐蚀性为1.42%。玻璃的综合性能十分优异,是一种十分理想的低温封接玻璃材料。
[Abstract]:Sealing glass is a new kind of sealing material, because of its good sealing performance, chemical stability and high mechanical strength, it has a wide range of applications. Low temperature sealing glass has lower melting point than ordinary sealing glass. Can produce liquid phase at a lower temperature, As the most successful low temperature sealing glass, the leaded sealing glass is used in many fields. In this paper, the PbOB_2O_3 system with low softening point is selected as the basic system for sealing glass. The effects of different additives on the properties of lead-boron glass were investigated. Finally, the low melting point and good comprehensive properties of lead-boron based sealing glass were obtained. For lead-boron glass matrix, when the content of PbO was 77wt.%, The initial melting temperature of the glass reached its lowest point, 465 鈩，

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