Sintering behavior and thermal property of Mg_(2)SnO_(4)

摘要

The sintering behavior of Magnesium Orthostannate (Mg_(2)SnO_(4)) by Magnesium oxide (MgO) and tin oxide (SnO_(2)) was investigated. Mg_(2)SnO_(4) compound was formed by traditional solid state reaction (SSR) at elevated temperatures over a range of 600℃-1300℃. 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℃, depending on the concentration of H_(2) 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.