Solid state mixed oxides synthesis under microwave heating (JMSL10627-04)
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During the last 10 years the use of microwaves in chemistry has found many applications. This comes from the possibility of obtaining particular operative conditions not available through traditional synthetic methodologies. This is in fact an alternative heating tool for solid state synthesis is promising due to the increase of synthesis rate, the reduction of grinding steps during the synthesis process and for the peculiar property of the microwaves to heat a system “from the inside” . Here we report on some microwave assisted solid state synthesis of inorganic solids of technological interest such as chromites, ferrites, spinels and garnets. The syntheses have been performed following conventional reaction scheme: oxide–oxide and oxide–decomposing intermediate. The oxide–metal in oxygen current and double salt thermal decomposition reactions have been reported already . Domestic multimode microwave ovens (Whirlpool, Talent, 3D System 2.45 GHz) and alumina crucibles were used...
KeywordsMicrowave Heating PbO2 Yttrium Iron Garnet Sodium Tungstate Sodium Aluminate
This work was supported by a grant of MIUR (PRIN 1999–2001 “Applicazioni della tecnologia a microonde nei processi chimico-fisici in presenza di solidi”).
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