中文摘要：

主要研究了Pr掺杂对Zn—Bi系压敏电阻的性能的影响。当Pr6O11掺杂量为5．49％（质量分数），烧成温度为1150℃时，压敏电压达到400V／mm；当Pr6O11。掺杂量为3．37％（质量分数），烧成温度为1200℃时，非线性系数达到48。研究还发现Pr—Y共掺杂能显著地提高Zn—Bi系压敏电阻的压敏电压，但会对体系的非线性系数和漏电流产生不利影响。

英文摘要：

In this article, we mainly studied the effects of Pr doping Zn-Bi system on its properties. The results show that when the sintering temperature was 1150 ℃ and the dopant of Pr6Oll was 5.49w%, the varistor voltage got 400 V/mm and when the temperature was 1200 ℃and 3.37wt Pr6Ol doping, the nonlinear co efficient got 48. Study also find that the codoping of Pr-Y can significantly improve the varistor voltage of Zn- Bi system, but it has the adverse effects on the nonlinear coefficient and leakage current.