Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

2ZrO₂·P₂O₅ powder, which is not synthesized by solid reaction method, was successfully synthesized through PVA solution method. In this process, the firing temperature and the PVA content strongly affected the crystallization behavior and final particle size. A stable α-phase 2ZrO₂·P₂O₅ was synthesized at a firing temperature of 1200 °C and holding time of 4 h. β-phase 2ZrO₂·P₂O₅ was observed, with un-reacted ZrO₂ phases, for firing temperatures lower than 1200 °C. In terms of the PVA content effect, the powder prepared with a PVA mixing ratio of 12:1 showed stable α-phase 2ZrO₂·P₂O₅; however, the β-phase was found to co-exist at relatively higher PVA content. The synthesized α-phase 2ZrO₂·P₂O₅ powder showed an average particle size of 100~250 nm and an average thermal expansion coefficient of −2.5 × 10⁻⁶/°C in the range of room temp. ~800 oC.