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Series of (Bi 2 O 3 ) x (ZnO) 60−x (B 2 O 3 ) 40 glasses were prepared from pure oxides. The dilatometric glass transition temperature decreased from 484 to 382 °C and the coefficient of thermal expansion increased from 5.3 to 9.5 ppm °C −1 for 10 ≤ x ≤ 50. From Raman scattering spectra and far infrared spectra it is suggested that the...
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