Synthesis and thermal expansion property of Cr2W3O12 doped with WO3

Cr2W3O12, one of the members negative thermal expansion family A2M3O12, is reported to be prepared by solid-state method with Cr2O3 and WO3, which was impossible before. Here, synthesis Cr2W3O12 carried out sintering. The powder mixture WO3 obtained using Zn(CH3COO)2 · 2H2O as catalyst. When (0–25 mol. %) added 15 20 % excess much formed especially because addition 10 2H2O. For comparison, commercial ZnO used an addition, but its catalytic role lower than that roles are ascribed compensate volatility speed up reaction + 3WO3 → action 2H2O, respectively. samples show positive due influence WO3.