耐压视窗玻璃材料体系及性能研究OA

The performance and physical tempering effect of pressure resistant window glass are significantly different due to different material systems.This study investigated four types of glass for pressure resistant window glass:sodium calcium silicate glass,alkali-free aluminosilicate glass,3.3 borosilicate glass,and 4.0 borosilicate glass.Their fundamental thermal and mechanical properties were tested.The structural reasons for the differences in the properties of four types of glass were explained by Raman spectroscopy and nuclear magnetic resonance spectroscopy.The physical tempering mechanism for increasing strength of four types of glass was studied based on the viscosity temperature characteristics,thermal and mechanical properties.The study finds that:in terms of composition,sodium calcium silicate glass forms bond breaking network due to its high content of alkali metal and alkaline earth metal oxides.In terms of structure,alkali-free aluminosilicate glass appears[AlO4]and[AlO5]structures,and borosilicate glass appeares[BO3]and[BO4]structures.The common factors of composition and structure lead to the differences in the three-dimensional network structure of the four types of glass,which affect their performance.In terms of performance,the viscosity of sodium calcium silicate glass and alkali-free aluminosilicate glass changes more violently from tempering temperature to transition temperature,and have higher elastic modulus and thermal expansion coefficient,so they can form higher surface compressive stress and significantly improve strength.The research results have guiding significance for the research and development of pressure resistant window glass.