Details

Autor(en) / Beteiligte

• ANGEL, PAUL W.
• RAY, CHANDRA S.
• DAY, DELBERT E.

Titel

Glass Formation and Properties in the System Calcia-Gallia-Germania

Ist Teil von

• Journal of the American Ceramic Society, 1985-11, Vol.68 (11), p.637-640

Ort / Verlag

Oxford, UK: Blackwell Publishing Ltd

Erscheinungsjahr

1985

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• The critical cooling rate for glass formation, R sub c was measured for four compositions in the system calcia-gallia-germania. The activation energy, E, and frequency factor, nu, for the crystallization process were determined by reheating the glasses at varied constant heating rates and measuring the temperature of crystallization. Both E and nu increased, with increasing germania content of the glass, whereas R sub c decreased. The density, refractive index, and Abbe number were also measured; all decreased with increasing GeO2 content. These results are compared with those for calcia-gallia-silica glasses of comparable compositions.