Preparation of zero-thermal-expansion materials by hybridization of oxides

Abstract

Material with zero-thermal-expansion is required for development and improvement of high temperature devices, electronic package and so on. One possible method to obtain zero-thermal expansion material is co-sntering of material with positive thermal expansion and one with negative thermal expansion. We have clarified that co-sintering of ZrO₂ and ZrW₂O₈ is possible below 1200 °C. Also, we have succeeded in preparation of zero-thermal-expansion material by cofiring the mixture of ZrO₂ and ZrW₂O₈ with weight ratio of 2/1.