Characterization of Lead Lanthanum Zirconate Titanate (PLZT) Ceramics Sintered at Various Temperatures

บทคัดย่อ

This article characterizes microstructure and electrical properties of lead zirconate titanate, PZT, ceramics doped with lanthanum oxide (La₂O₃). The Pb_1-xLa_x(Zr_0.54Ti_0.46)O3 (x =0.01, 0.03 and 0.05) ceramics were prepared by a conventional mixed-oxide method, three sintering temperatures were
performed: 1200°C, 1250°C and 1300°C. X-ray diffraction technique was employed to determine the lattice parameters of the ceramics, the tetragonal lattice parameters a and c were between 4.028 - 4.041 Å and 4.933 – 4.949 Å, respectively, the ratio of c/a = 1.22 was obtained. Dielectric, ferroelectric and piezoelectric properties of the ceramic system were largely controlled by the dopant content and sintering temperature.