Charge nonstoichiometric 0.94Bi_(0.5+x)Na_(0.5-x)TiO_(3)-0.06BaTiO_(3)(BNT-BT)(x=-0.02,-0.01,0,0.01,0.02)ceramics were pre-pared and investigated.The depolarization temperature was dependent on composition and the fer...Charge nonstoichiometric 0.94Bi_(0.5+x)Na_(0.5-x)TiO_(3)-0.06BaTiO_(3)(BNT-BT)(x=-0.02,-0.01,0,0.01,0.02)ceramics were pre-pared and investigated.The depolarization temperature was dependent on composition and the ferroelectric property of x>0 was suppressed more significantly than the x<0,indicating the composition-sensitive electrical properties.Furthermore,the x=-0.02 was close to the insulator/conductor composition boundary while the x=0.02 was close to the ferroelectrics/relaxor boundary.These results were attributed to the complex effect of donor doping and acceptor doping on depolarization field.This work provides robust clues to tune and/or design electrical property and conductivity of Bi_(0.5)Na_(0.5)TiO_(3)-based materials.展开更多
基金supported by the State Key Program for Basic Research of China(2015CB921203)the National Nature Science Foundation of China(11674156,51721001,11804150)the“Deng Feng B”of Nanjing University.
文摘Charge nonstoichiometric 0.94Bi_(0.5+x)Na_(0.5-x)TiO_(3)-0.06BaTiO_(3)(BNT-BT)(x=-0.02,-0.01,0,0.01,0.02)ceramics were pre-pared and investigated.The depolarization temperature was dependent on composition and the ferroelectric property of x>0 was suppressed more significantly than the x<0,indicating the composition-sensitive electrical properties.Furthermore,the x=-0.02 was close to the insulator/conductor composition boundary while the x=0.02 was close to the ferroelectrics/relaxor boundary.These results were attributed to the complex effect of donor doping and acceptor doping on depolarization field.This work provides robust clues to tune and/or design electrical property and conductivity of Bi_(0.5)Na_(0.5)TiO_(3)-based materials.
