火花塞陶瓷绝缘体高温分流电阻的研究

火花塞陶瓷绝缘体的高温分流电阻会影响火花塞的使用性能和寿命,笔者研究了氧化铝中Na2O含量、配方组成和烧结温度对火花塞陶瓷绝缘体高温分流电阻的影响。结果表明:随着氧化铝原材料中Na2O含量的增加,试样的高温分流电阻逐渐降低;在配方组成中,当CaO的含量由33%增加至40%,氧化铝原材料中Na2O含量为0.1%时,试样在500℃时的分流电阻由517MΩ提升至1 192MΩ;烧结温度低于1 580℃时,试样的高温分流电阻较低。

Research of Shunt Resistance of Spark Plug Ceramic Insulator at High Temperature

The performance and life of the spark plug was influenced by shunt resistance of ceramic insulator at high temper-ature .In the present work ,the effect of Na2 O content in the alumina ,formula composition and sinter - ing temperature on shunt resistance of ceramic insulator at high temperature was studied .The results indicate that ,the shunt resistance of ce-ramic insulator at high temperature decreased with the increase content of Na 2 O in the alumina raw material ;the shunt re-sistor at 500 ℃ increased from 517 MΩ up to 1 192 MΩ when the CaO content of formula increased from 33% to 40% with alumina contained 0 .1% Na2O ;the shunt resistance at high temperature was low when the sintering temperature of ceramic insulator was below 1 580 ℃ .