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

摘要

PZT ceramics were prepared from a mixture of a mixed-oxide powder with the particles as large as 1 mu m, and a sol from a triol sol-gel method. The latter provided small particles of approx 20-100 nm after being calcined at 600 deg C. This mixture thus so called 'sol-bonded PZT powder'. The powder was sintered at the temperature between 950-1200 deg 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 deg C, where the densification was optimized.