Hazard and Precautionary Statements (GHS)

Magnesium orthostannate Chemical Properties,Usage,Production

Description

Magnesium orthostannate Mg2SnO4 has the CAS number of 12032-29-0 and a molecular weight of 191.0145 g/mol. It can be synthesized at 900°C with high purity using the peroxide route: MgO2 + SnO2 + heat?MgSnO4 The method involves mixed cation precursors, derived using magnesium chloride, tin tetrachloride and aqueous HCl. They are added to a basic solution of ammonia and hydrogen peroxide and the lightyellow precipitate is filtered, dried and calcined at relatively low temperatures of about 700–1200°C to form homogeneous crystalline MgSnO3 and Mg2SnO4. The powder produced shows a large specific surface area and small grain size, leading to a high sinterability. A peroxo-precursor is formed during the synthesis by a precipitation step from aqueous solution. The thermal decomposition of the X-ray amorphous precursor leads directly to Mg2SnO4. Magnesium metastannate, MgSnO3, is formed after thermal degradation of a corresponding peroxo-precursor at temperatures below 700°C. Further thermal treatment at temperatures above 700°C leads to the decomposition of MgSnO3 to Mg2SnO4 and SnO2.

Uses

Mg2SnO4 has recently been studied for use as a potential electronic ceramic for applications in the hightemperature and high-frequency domain such as thermally stable capacitors with low permittivity and small loss tangent.