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Novel synthesis of high phase-purity Mg2SnO4 from metallic precursors via powder metallurgy route

Summary: Novel synthesis of high phase-purity Mg2SnO4 from
metallic precursors via powder metallurgy route
Abdul-Majeed Azad1,
Advanced Materials Research Center, SIRIM Berhad, PO Box 7035, 40911 Shah Alam, Selangor, Malaysia
Received 24 July 2000; accepted 7 September 2000
A novel yet simple technique of synthesizing oxide ceramics from metallic precursors has been
described. Magnesium orthostannate, Mg2SnO4, a potential candidate for applications in high tem-
perature-high frequency domain as a ceramic capacitor element, was synthesized from metallic tin and
magnesium powders. An alloy of composition Mg2Sn was prepared by the conventional powder
metallurgy route. This up on heating in air under carefully designed ordinary and mild experimental
conditions, yielded single-phase inverse spinel type Mg2SnO4. The systematic evolution of phase(s)
and powder morphology of the target oxide is discussed and compared with those in powders obtained
by other techniques. The present method totally obviates the use of resilient oxides and of carbonate
and nitrates precursors, which are invariably the source of environmental pollutants such as CO2 and
NOx. In addition, the difficulties normally encountered in ceramic syntheses from the significant
difference in particle size of the starting powders are also eliminated. The technique offers an
environmental-friendly viable solution to making dense ceramics in thin multilayer formats (MLFs)


Source: Azad, Abdul-Majeed - Department of Chemical and Environmental Engineering, University of Toledo


Collections: Materials Science; Energy Storage, Conversion and Utilization