Preparation and properties of LaPO4-contained machinable ZrSiO4 caramics

Abstract

Preparation of ZrSiO₄/LaPO₄ composites and its mechanical properties were studied. ZrSiO₄ powder was mixed with highly sinterable LaPO₄ powder by a wet precipitation method. The powder was pressed and sintered at 1550°C for 3hr. The XRD pattern of body sintered showed that two phases didn't react and decomposite. The relative density of ZrSiO₄/LaPO₄ composites was around 96 %. The more we added LaPO₄ to ZrSiO₄, the more fast drilling rate was. Thus we succeeded to prepare machinable ZrSiO₄/LaPO₄ composites.