Abstract: The ZnO-B2O3-SiO2 glass is an important sort of the low-melting glass which has important applications in deep processing field of glass.In the ZnO-B2O3-SiO2 glass,the ZnO content have a significant influence on the structure and properties of the glass.The influence of ZnO on the structure and properties of ZnO-B2O3-SiO2 low-melting glass was studied by DSC,FTIR,CTE test,chemical stability test and he coating application.It was found out that the increase of ZnO could reduce the characteristic temperature of ZnO-B2O3-SiO2 low-melting glass,and increase the CTE and chemical stability.The results showed that Zn2+ with a form of [ZnO4] entered the network structure of glass,and there was a transition [BO4] tetrahedral structure to [BO3] trihedral structure with the increase of ZnO.The optimum amount of ZnO was 32%.In this situation,ZnO-B2O3-SiO2 low-melting glass had the lowest Tg (495 ℃) and Ts (529 ℃),and the CTE was 8.96×10-6 /K.The chemical stability was A level.In the coating application of low-melting glass,the glass in that ZnO content is 32% present the best hardness which is 648.9 Hv.

Key words: low-melting glass;thermal property;chemical stability;the network structure of glass