【摘要】 采用液氨分解制备的75%H2+25%N2混合气体形成还原性气氛,同时掺杂Nb2O5等添加剂使晶粒半导化,通过在空气中热处理使晶界绝缘,制得SrTiO3环型压敏电阻器,并在国内较早投入大规模商品化生产。笔者对产品进行了常规电性能测试,特殊试验及寿命试验,并与国内外同类产品进行了比较。结果表明:产品主要电气性能达到或接近国外同类产品水平,成品率达到90%以上。更多还原

【Abstract】 The SrTiO3 ring varistors have been successfully developed. To acquire the varistors, dope SrTiO3 with small amount of additives such as Nb2O5, and sintered in the atmosphere of 75%H2+25%N2, which is obtained by decomposing liquid ammonia, and then heat-treated in air. Normal electrical performance tests, special tests and life tests were carried out and the product was compared with other products. The results show that the main properties of the varistaors are close to those of the imported varistors of the same kind. The varistors have been put into commercial production in China and the yield reached 90% or over.更多还原