Preparation and characterization of the strontium stannates SrSnO_(3) and Sr_(2)SnO_(4)

摘要

The strontium stannates SrSnO_(3) and Sr_(2)SnO_(4) can be synthesized by the wet chemical peroxide route. The first step of the preparation is the precipitation of stoichiometric peroxo precursors which can be transformed into the corresponding stannates by thermal degradation. The resulting very fine, single-phase strontium stannate powders have extremely small impurity contents. They show a very fast densification behaviour during sintering at temperatures above 1200℃. A phase Sr_(3)Sn_(2)O_(7) could not be prepared using the peroxide route.