【摘要】 通过固相法制备了施主掺杂的（Ba,Pb）TiO₃半导体陶瓷,研究了掺杂对（Ba,Pb）TiO₃陶瓷的物理性能、显微结构、电畴结构及半导化机理的影响。结果表明,掺加一定量的施主Sb³⁺,Nb⁵⁺及复合施主(Sb³⁺,Nb⁵⁺)均可以实现陶瓷的半导化,而且杂质种类的不同材料的显微结构、电畴结构及半导化机理也存在显著的差别,复合施主掺杂可以进一步降低材料的室温电阻率,并且制得结构致密、高耐压值的（Ba,Pb）TiO₃陶瓷。结合不同施主掺杂对显微结构、电畴结构的影响及缺陷化学理论,对（Ba,Pb）TiO₃陶瓷的半导化机理给出了定性的解释。更多还原

【Abstract】 (Ba,Pb)TiO₃ semiconductor ceramic samples were synthesized by solid-phase reaction,and the effects of different donor-doping on the physical properties,microstructure,domain structures,and the semiconduction mechanism of the（Ba,Pb）TiO₃ ceramics were discussed.The semi-conductive ceramics was obtained by donor-doping of Sb³⁺or Nb⁵⁺,or composite- donor-doping of(Sb³⁺,Nb⁵⁺),and their properties changed by the dope.The donor-doped composite exhibited a low room temperature resistivity,dense structure and high pressure endurance.The semiconduction mechanism of the ceramics was explained based on defect chemistry,and the role of the different donor-doping on the microstructure,domain structures of the materials.更多还原