Abstract
The research reports the results of an investigation into the effects of processing temperature and concentration of nano-sized WO 3 addition on phase formation, densification and grain size of PZT ceramics. Increasing the content of WO 3 addition and sintering temperature showed a complementary effect on tetragonal-to-rhombohedral phase formation. An addition of only 0.5 vol% of WO 3 was found to help increase the densities as well as dramatically reduced the grain size of the PZT/WO 3 ceramics regardless of sintering temperature used. Based on these results, optimum processing temperature is about 1200°C where high-density, high-purity PZT/WO 3 ceramics were obtained.
Acknowledgments
This work is supported by the Thailand Research Fund (TRF), the Faculty of Science and the Graduate School, Chiang Mai University.