Preparation of Sol-bonded Lead Zirconate Titanate Ceramics via Sol-gel and Mixed-oxide Methods

Abstract

PZT ceramics were prepared from a mixture of a mixed-oxide powder with the particles as large as 1 μ m, and a sol from a triol sol-gel method. The latter provided small particles of ∼ 20–100 nm after being calcined at 600°C. This mixture thus so called ‘sol-bonded PZT powder’. The powder was sintered at the temperature between 950-1200°C. X-ray diffraction results suggested that phases were changed from predominant rhombohedral to tetragonal with increasing the sintering temperature. The maximum room temperature dielectric constant of 1471 at 1 kHz could be achieved in the ceramic sintered at 1100°C, where the densification was optimized.

Keywords:

• PZT
• sol-gel
• mixed-oxide
• dielectric constant

Acknowledgments

This work is supported by the Thailand Research Fund (TRF) and the Thailand Toray Science Foundation (TTSF). CS would like to thank the Graduate School, Chiang Mai University and the Ministry of Education for financial support through Thaksin University, Thailand.