Dependence of depolarization temperature on cation vacancies and lattice distortion for lead-free 74(Bi(1/2)Na(1/2))TiO(3)-20.8(Bi(1/2)K(1/2))TiO(3)-5.2BaTiO(3) ferroelectric ceramics

作者：Zhu Mankang^*; Hu Hancheng; Lei Na; Hou Yudong; Yan Hui

来源：Applied Physics Letters, 2009, 94(18): 182901.

DOI：10.1063/1.3130736

• barium compounds
• bismuth compounds
• dielectric depolarisation
• ferroelectric ceramics
• ferroelectric transitions
• permittivity
• potassium compounds
• sintering
• sodium compounds
• vacancies (crystal)

In this paper, the off-morphotropic-phase-boundary 74(Bi(1/2)Na(1/2))TiO(3)-20.8(Bi(1/2)K(1/2))TiO(3)-5.2BaTiO(3) ceramics were fabricated at different sintering temperatures. It was found out that as the sintering temperature increases, the volatilization of the A-site elements is aggravated, thus generating the oxygen vacancies; meanwhile, the tetragonality of the perovskite lattice reduces gradually. Besides, the temperature-dependent dielectric responses revealed that as the sintering temperature increases, the depolarization temperature T(d) decrea

• 出版日期2009-5-4
• 单位北京工业大学