کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1518596 | 1511606 | 2008 | 6 صفحه PDF | دانلود رایگان |
Studies of structural and electrical properties have been carried out on a number of glasses with wide ranging compositions in the glass systems Li2O·MO·Bi2O3·B2O3 (where M=Zn or Cd), in order to understand the effect of transition metal (TM) ions on the structure of these glasses. The density and molar volume measurements have also been made to understand the structural changes occurring in these glasses. The dc conductivity measured in the temperature range 423–623 K obeys Arrhenius law. It increases with increase in Li2O/MO ratio. The results of infrared spectra indicate that TM ions (Zn2+ or Cd2+) behave as network former in the present system. Boron exists in both tri- and tetra-hedral units in these glasses and no boroxol ring formation takes place in the glass structure. Values of theoretical optical basicity have also been reported.
Journal: Journal of Physics and Chemistry of Solids - Volume 69, Issue 7, July 2008, Pages 1855–1860