The effect of addition of small quantities of Al2O3 and B2O3 to Ag2O-P2O5 glasses with a composition close to that of AgPO3 glass has been studied. Very small amounts drastically reduce the tendency to form AgPO3 crystals. The glass transformation temperature, T(g) and electrical conductivities-sigma are strongly affected: an increase of T(g) up to 150-degrees-C and a one order of magnitude increase of sigma have been recorded with respect to the binary Ag2O-P2O5 glasses. On the basis of the T(g) versus composition curves, structural hypotheses have been developed. The experimental data suggest a network former role for B2O3 and a network modifier role for Al2O3.
Thermal and Electrical-properties of Ag2o-m2o3-p2o5 Glasses (0.65-less-than-or-equal-to-ag2o/p2o5-less-than-or-equal-to-1.5, M=al, B, M2o3/p2o5-less-than-or-equal-to-0.36) / Branda, Francesco; Costantini, Aniello; A., Buri. - In: THERMOCHIMICA ACTA. - ISSN 0040-6031. - ELETTRONICO. - 199:(1992), pp. 57-62. [10.1016/0040-6031(92)80250-Z]
Thermal and Electrical-properties of Ag2o-m2o3-p2o5 Glasses (0.65-less-than-or-equal-to-ag2o/p2o5-less-than-or-equal-to-1.5, M=al, B, M2o3/p2o5-less-than-or-equal-to-0.36)
BRANDA, FRANCESCO;COSTANTINI, ANIELLO;
1992
Abstract
The effect of addition of small quantities of Al2O3 and B2O3 to Ag2O-P2O5 glasses with a composition close to that of AgPO3 glass has been studied. Very small amounts drastically reduce the tendency to form AgPO3 crystals. The glass transformation temperature, T(g) and electrical conductivities-sigma are strongly affected: an increase of T(g) up to 150-degrees-C and a one order of magnitude increase of sigma have been recorded with respect to the binary Ag2O-P2O5 glasses. On the basis of the T(g) versus composition curves, structural hypotheses have been developed. The experimental data suggest a network former role for B2O3 and a network modifier role for Al2O3.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
