A large glassforming region exists in the potassium niobium silicate system, extending to as little as 20 mol% silica. Addition of niobium oxide to potassium silicate glasses regults in increases in density, refractive index and glass transformation temperatures, and a decrease in thermal expansion coefficients.
Origin
Alfred University, Usa
Journal Title
Phys & Chem Of Glasses 35 4 1994 153-159
Sector
Special Glass
Class
S 813