• Jeyalakshmi.C

Copper improves the performance of the iron and chromium-based catalysts towards the HTS reaction, by increasing the intrinsic activity. This effect increases with the amount of this dopant in solids. It favors sintering leading to solids with low surface areas but in the presence of chromium sintering is delayed and this results in catalysts with higher activity.Solution combustion synthesis (SCS) is a versatile, simple and rapid process, which allows effective synthesis of a variety of nanosize materials. This process involves a self- sustained reaction in homogeneous solution of different oxidizers (e.g., metal nitrates) and fuels (e.g., urea, glycine, hexamine). Depending on the type of the precursors, as well as on conditions used for the process organization, the SCS may occur as either volume or layer- by-layer propagating combustion modes. This process not only yields nanosize oxide materials but also allows uniform (homogeneous) doping of trace amounts of rare-earth impurity ions in a single step. Among the gamut of papers published in recent years on SCS, synthesis of luminescent materials and catalysts occupy the lion share. The latest developments in SCS technique are discussed based on the materials applications. The synthesis of nanophosphors is currently a hot topic in the field of CS. From the work, it is evident that urea continues to be the preferred fuel for phosphor materials synthesis. It is well recognized that the fuel is an important component for the preparation of oxides by SCS. Urea and glycine are the most popular and attractive fuels for producing highly uniform, complex oxide ceramic powders with precisely controlled stoichiometry. The glycine nitrate process (GNP) has been billed as ‘environmentally compatible’

combustion synthesis, nanoclusters, prosthetics, glycine, synergy.

"SOLUTION COMBUSTION SYNTHESIS OF MIXED METAL OXIDES- EFFECT OF VARIOUS FUELS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.10-15, May-2019, Available :http://www.jetir.org/papers/JETIR1905H02.pdf

"SOLUTION COMBUSTION SYNTHESIS OF MIXED METAL OXIDES- EFFECT OF VARIOUS FUELS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp10-15, May-2019, Available at : http://www.jetir.org/papers/JETIR1905H02.pdf