CAJ | 학술논문

采用常规陶瓷工艺制备了Pb(Zn_(1/3)Nb_(2/3))_(0.5)(Zr_(0.5)Ti_(0.5))_(0.5)O_3 (0.5PZN-0.5PZT)铁电陶瓷,并在氧气氛下进行退火.运用XRD、直流电导率和介电温度谱测试氧气氛退火前后陶瓷相结构与电性能的变化,并对弛豫性与微结构的关系进行探讨.结果表明,氧气氛退火可有效补偿体系中的氧空位,降低四方相含量,材料的弛豫性显著增强.
채용상규도자공예제비료Pb(Zn_(1/3)Nb_(2/3))_(0.5)(Zr_(0.5)Ti_(0.5))_(0.5)O_3 (0.5PZN-0.5PZT)철전도자,병재양기분하진행퇴화.운용XRD、직류전도솔화개전온도보측시양기분퇴화전후도자상결구여전성능적변화,병대이예성여미결구적관계진행탐토.결과표명,양기분퇴화가유효보상체계중적양공위,강저사방상함량,재료적이예성현저증강.
Pb(Zn_(1/3)Nb_(2/3))_(0.5)(Zr_(0.5)Ti_(0.5))_(0.5)O_3(0.5PZN-0.5PZT) ferroelectrics were prepared by conventional mixed oxide method. The sintered ceramics were further annealed in oxygen ambient. Phase structure and electric property of specimens before and after thermal annealing had been characterized by X-ray diffraction patterns,DC conductivity and dielectric permittivity as functions of temperature.The relationship of relaxation with microstructure for the sintered and annealed ceramics had been discussed.The experimental results revealed after annealing in oxygen ambient, the oxygen vacancies and tetragonal phase were largely reduced,therefore an increased relaxation was observed in the 0.5PZN-0.5PZT ferroelectric ceramics.