Thermal and structural role of additives in P sub(2)O sub(5)-ZnO-Sb sub(2)O sub(3) glass for low expansion sealing materials

A glass based on the P sub(2)O sub(5)-ZnO-Sb sub(2)O sub(3) ternary system was modified with various additives, such as RO (R=Ca, Ba and Mn), B sub(2)O sub(3) and V sub(2)O sub(5), for low temperature and low expansion sealing materials. The glass transition temperature (T sub(g)) and coefficient of thermal expansion (CTE) were monitored and reduced with additive compositions of RO. Additional incorporation of B sub(2)O sub(3) at the expense of RO also showed a similar result. Significant improvement was observed when the glass was modified with V sub(2)O sub(5.) A glass showing T sub(g)