Py. Shih et al., THE EFFECT OF SNO AND PBCL2 ON PROPERTIES OF STANNOUS CHLOROPHOSPHATES GLASSES, Materials chemistry and physics, 50(1), 1997, pp. 63-69
The effect of PbCl2 or SnO addition on properties of stannous chloroph
osphate glasses has been studied. Either SnO or PbCl2 addition improve
s chemical durability of these glasses in deionized water. Density, ha
rdness, glass transition temperature and softening temperature of the
glasses increase with increasing PbCl2 or SnO content. Crystallization
of a 40P(2)O(5)-50SnCl(2)-10PbCl(2) glass appears at a temperature ar
ound 440 degrees C with an activation energy of 271 kJ mol(-1). Fourie
r transform IR spectra indicate the presence of Pb-O-P linkages and P-
Cl bonds in the short-range glass structure, -[PClO3]-tetrahedron. A p
ossible structural model of Sn-Pb-P-O-Cl glasses is proposed and used
to explain the property change due to composition variation. The effec
t of prolonged melting for 30-60 min on the properties and spectroscop
y of Sn-Pb-P-O-Cl glasses is subtle.