Luminescence Studies of CaTiO3 Nano Powders

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Editors : Dr. B. M. Manohara , M.Sc., M.Ed., M.Phil., Ph.D. , Assistant Professor and Head, Department of Physics, GOVRNAMENT FIRST GRADE COLLEGE MCC ‘B’ Block, Davangere, Karnataka, India Edition : 1 Book Size : 5*8 Pages 134 ISBN: 978-81-945504-6-4 Format : Paperback & Ebook

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Synthesis of nanoparticles consisting of two major routes, namely physical and chemical routes. In physical route one may consider ‘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-precipitation, 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 starting materials and the poor homogeneity of the product.
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