Preparation of Zr(Mo,W)O with a larger negative thermal expansion by controlling the thermal decomposition of Zr(Mo,W)(OH,Cl)∙2HO.

Solid solutions of Zr(Mo,W)O(OH,Cl)∙2HO with a preset ratio of components were prepared by a hydrothermal method. The chemical composition of the solutions was determined by energy dispersive X-ray spectroscopy (EDX). For all the samples of ZrMoWO(OH,Cl)∙2HO (x = 0.