不同施主掺杂对(Sr_(0.3)Ba_(0.7))TiO_3系热敏LPTC电阻率的影响

The Effects of Different Donor-doping on (Sr_(1-x)Ba_x)TiO_3 LPTC Thermal Resistor

本文研究了 Nb2 O5、Y2 O3 或 Sb2 O3 不同施主掺杂对 Sr0 .3 Ba0 .7) Ti O3 热敏陶瓷 LPTCR的影响 ,并讨论了不同施主掺杂的不同半导化机理。发现在本实验条件下掺 Nb的 (Sr0 .3 Ba0 .7) Ti O3 热敏陶瓷为缓变形 LPTC,掺 Sb和 Y的 (Sr0 .3 Ba0 .7) Ti O3 热敏陶瓷为突变型 LPTC,且掺 Sb的 LPTC线性度最好 ,线性温区较宽。

In this paper, the effects of different donor doping (Nb\-2O\-5?Y\-2O\-3 or Sb\-2O\-3) on the properties of (Sr\-\{0.3\}Ba\-\{0.7\})TiO\-3 LPTC thermal ceramics have been studied, and the semi conductivity mechanisms of different donor doping have been discussed as well. It is found that on this experimental condition, (Sr\-\{0.3\}Ba\-\{0.7\})TiO\-3 thermal ceramic doped with Nb is the slow change model, but it turns to the sudden change model doped with Sb and Y. It is also found that the linearity of LPTC doped with Sb is the best and the linear temperature range is wider than others.