Thermal and optical properties of CuO–BaO–B2O3–P2O5 glasses

CuO-doped barium borophosphate glasses in a series of ΧCuO-(45- Χ)BaO-10B 2 O 3 -45P 2 O 5 in molar ratio with x = 0-15 mol% were prepared by a melt-quenching technique. All the glasses had excellent thermal stability against crystallization. Glass transition temperature, thermal expansion coefficient and molar volume decrease with increasing CuO concentration. The linear relationship between the absorption coefficient and CuO concentration exists for a peak wavelength in the transitions of 2 A 1g → 2 B 1g , 2 B 2g → 2 B 1g, 2 E g → 2 B 1g . The relationship between the properties and glass structure evaluated by Raman spectroscopy is discussed.