Zn2+ Substitution by Pb2+ in Alkaline-boro-aluminosilicate Glass-ceramics: Microstructural Aspects

Mrinmoy Garai; Basudeb Karmakar

Volume 3, Issue 4 , 2018, , Pages 206-212


  This study exemplifies the effects of 5 wt.% Pb2+ addition replacing the same Zn2+ content on crystallization and microstructure of 10B2O3-16Al2O3-39SiO2-12MgO-12MgF2-4K2O-1Li2O-1AlPO4 (wt.%) glass-ceramic composite. Increase of linear thermal-expansion (6.93 to 7.18×10-6/K at 50-600°C) in ...  Read More

Modeling shape and size dependence of thermal expansion and Debye temperature of nanocrystals

Madan Singh; Spirit Tlali; Krishna Chandra

Volume 2, Issue 2 , 2017, , Pages 72-75


  A simple theoretical model is developed to explore the size and shape dependence of thermal expansion and Debye temperature of nanomaterials. The model theory is based on cohesive energy and surface area change of the nanocrystals compared to the bulk crystals. It is found that the Debye temperature ...  Read More