Study on BaTiO3 semiconducting ceramic materials with lower resistivity

In this paper, the semiconducting mechanism of BaTiO3 semiconducting ceramics with ABO3 perovskite structure was investigated. The PTCR characteristics of BaTiO3 semiconducting ceramic with lower resistivity have been studied by substituting in A position via doping with single donor Sb2O3, composite substituting in A and B position via doping with double donor Y2O3 + Nb2O5, and substituting in oxygen position via doping with CaF2 or TiCl3.The results obtained show that lower resistivity and good PTC effect of BaTiO3 semiconducting ceramics with room temperature resistivity (ρ 25) of 6.08 Ω cm, temperature coefficient (α T ) of 12.21 × 10−2 °C−1 and a lift–drag ratio (β) of 3.8 × 104 can be achieved.