Luminescence Studies of CaTiO3 Nano Powders

Download or read book Luminescence Studies of CaTiO3 Nano Powders written by Dr. B. M. Manohara, and published by Nitya Publications. This book was released on 2020-01-01 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesis of nanoparticles consisting of two major routes, namely physical and chemical routes. In physical route one may nsider ‘top-down’ approach which starts from solid and confining it to a limited size. On the other hand, one may consider ‘bottom-up’ approach which starts from molecular system and expands its size. In case of chemical route, the wet chemical technique for the synthesis of nanoparticles includes sol-gel, combustion, co- recipitation, hydrothermal, microwave etc. By conventional solid state route, it is not possible to obtain a nano sized powder because initial sizes of the reactants are much larger. A major challenge encountered in the synthesis of nanoparticles is the poor control over stoichiometry at the nano level. Although the solid state route is simple, this technique suffers from major drawbacks like weak reactivity of the startingmaterials and the poor homogeneity of the product.