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Structural and Thermophysical Properties of (PbO) 0.5 (SiO 2 ) 0.5 Glasses: Effect of SnO 2 Incorporation
Author(s) -
Goswami Madhumita,
Sudarsan Vasanthakumaran,
Shrikhande Vilas K.,
Kothiyal Govind P.,
Kulshreshtha Shailendra K.
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.02209.x
Subject(s) - tin , materials science , thermal expansion , silicate glass , silicon , mineralogy , silicate , indentation hardness , glass transition , analytical chemistry (journal) , metallurgy , composite material , chemical engineering , chemistry , microstructure , engineering , polymer , chromatography
119 Sn and 29 Si solid‐state nuclear magnetic resonance studies on lead silicate glasses containing different amounts of SnO 2 confirmed that tin exists in the glass as distorted SnO 6 polyhedra and there is no direct interaction between tin and silicon structural units. Transmission electron microscopic studies have established that tin structural units are uniformly distributed in the glass. Significant changes in the values of glass transition temperature, microhardness, and thermal expansion coefficient with SnO 2 incorporation into the glass have been attributed to the increased rigidity of the glass network brought about by the replacement of weaker Pb–O linkages with stronger Sn–O linkages.