玻璃-陶瓷基支撑点对真空玻璃力学性能及热导的影响

Effect of Glass-Ceramic Based Support Pillars on Mechanical Properties and Thermal Conductivity of Vacuum Glass

近几年真空玻璃产业发展迅速,而支撑物作为真空腔体的支撑材料直接影响真空玻璃的透明度、受力、热导等性能。本文制备了一种弹性模量适中、热变形可调的玻璃-陶瓷基真空玻璃支撑点,研究了其制备工艺以及工艺对玻璃力学性能及热导的影响。结果表明:制备的支撑物材料粉体粒径分布范围集中在0.5~10μm之间,采用点胶工艺可制备高度在0.2~0.35 mm之间,直径在0.5~1.0 mm之间,尺寸可控的支撑点矩阵;支撑点在经过物理钢化后有晶体析出,为玻璃-陶瓷结构,提高了支撑点的强度;支撑点由“点接触”改为“面接触”可以有效避免支撑点的破碎和玻璃微裂纹的产生;适当调整支撑点的尺寸和间距可以在保证力学性能的基础上使玻璃同时具有低的热导。

In recent years,the vacuum glass industry has developed rapidly,and the support pillars in vacuum cavity directly affect the transparency,stress,thermal conductivity and other properties of the vacuum glass.In this paper,a glass-ceramic based vacuum glass support pillars with moderate elastic modulus and adjustable thermal deformation were prepared.The preparation technology and its influence on the mechanical properties and thermal conductivity of glass were studied.The results show that the support pillar material powder with particle size distribution between 0.5-10μm is concentrated.The matrix of support pillars with controllable size between 0.2-0.35 mm in height and 0.5-1.0 mm in diameter are prepared by dispensing process.After thermal tempering,the support pillars are precipitated into a glass-ceramic structure to improve the strength.Support pillars change from"point contact"to"surface contact"can effectively avoid the crushing of the support pillars and the glass micro-crack,and appropriate adjustment of the size and the spacing of the support pillars can make the glass have low thermal conductivity on the basis of ensuring the mechanical properties.