Stencil printing and sintering formation performance of tempered vacuum glazing support pillar

Abstract

PbO-TiO2-CaO-SiO2-RxOy glass powder slurry was printed on the surface of a tempered glass sheet by stencil and made into support pillars inside the vacuum glazing by sintering method. The molding parameters and microstructure of sintered formed support pillars(SFSP) were measured and observed, and the mechanical properties of SFSP were simulated by ANSYS. The forming results showed that the best forming parameters were obtained for the support pillars at a sintering temperature of 380 °C. The EDS results showed that the diffusion of Pb and Ti elements from the glass powder into the glass flakes occurred during sintering. The SEM results showed that the organizational structure of SFSP became more uniform and dense when the sintering temperature increased from 360 ℃ to 380 ℃. When the sintering temperature continued to increase, lots of crystalline material precipitated in SFSP and even produced holes. The analysis results of XRD showed that the crystal structure of SFSP was mainly composed of Pb0.6875Ca0.3125TiO3, which has the highest crystallinity and content at the sintering temperature of 380 ℃, and the structural strength and denseness of SFSP were good. The simulation results showed no significant difference between SFSP and stainless steel support pillars(SSSP) on the stress and deformation of tempered vacuum glazing(TVG). The SFSP could meet the safety requirement and optimize effects on reducing the stress on the support pillars.