Characterization of negative thermal expansion material Zr2-xTixWP2O12 with MgO

Abstract

In this study, it is executed to obtain [Formula: see text] ([Formula: see text], 0.10, 0.15, 0.20) ceramics with high relative density, 0–0.9 wt% MgO was added as a sintering aid. The influence of MgO amount and relative density on the coefficient of thermal expansion for [Formula: see text] was also investigated. Pure and monophase of Zr[Formula: see text]Ti[Formula: see text]WP2O[Formula: see text] with MgO has been obtained and MgO used sintering aid was doped in the crystal. The coefficients of thermal expansion of the 0.9 wt% MgO-doped sample and MgO-free sample were [Formula: see text] ppm/K and [Formula: see text] ppm/K, respectively. This result suggests that doping of MgO does not have an influence on the coefficient of thermal expansion. In other words, adding MgO increases sintering properties without change in the coefficient of thermal expansion.