Sintering behavior and thermal property of Mg₂SnO₄

Abstract

The sintering behavior of Magnesium Orthostannate (Mg₂SnO₄) by Magnesium oxide (MgO) and tin oxide (SnO₂) was investigated. Mg₂SnO₄ compound was formed by traditional solid state reaction (SSR) at elevated temperatures over a range of 600 ^∘C–1300 ^∘C. X-ray studies have revealed that the resulting, as-fired, compound is polycrystalline composed of an inverse spinel-structure grains separated partially by porosity. However it failed to detect any phase change as a result of annealing. Scanning electron microscope (SEM) was employed to follow-up any change in the morphology throughout the sintering and reduction processes. Thermal property Differential Scanning Calorimetry (DSC) revealed that reduction takes place at a temperature between 400 and 600 ^∘C, depending on the concentration of H₂ in the atmosphere in accordance with the X-ray studies. The technique employed has also demonstrated the stability of reduced species in typical atmospheres and working conditions.