介紹了汽車用氧傳感器的原理、結(jié)構(gòu)、發(fā)展情況及國內(nèi)外研究新動向,并簡要分析了其發(fā)
展趨勢。汽車尾氣中的有害物造成的污染,給人類賴以生存的大氣環(huán)境帶來了越來越嚴(yán)重的危害。發(fā)達(dá)國家從六、七十年代就開始探索汽車尾氣凈化的途徑,并取得了非常滿意的凈化效果。在我國,無鉛汽油已經(jīng)開始推廣使用,但還只是汽車尾氣凈化工程的一個開端,相關(guān)的研究工作還需要全面展開。汽車用氧傳感器在控制汽車尾氣排放、節(jié)省燃料、凈化空氣中起著重要的作用。經(jīng)摻雜穩(wěn)定的立方相氧化鋯(ZrO2) 固體電解質(zhì)材料,具有良好的高溫氧離子導(dǎo)電性,是制造汽車用氧傳感器的關(guān)鍵部件。氧傳感器有氧濃差型和極限電流型類型,國內(nèi)汽車用氧傳感器的研究和制造已達(dá)到一定的規(guī)模,國外新近還研究出了一種化學(xué)擴散障型氧傳感器。
關(guān)鍵詞:ZrO2 ;氧傳感器;濃差電池型;極限電流型;氧離子電導(dǎo)性
Abstract :The theory ,structure and the development status of oxygen sensors are introduced ,also with the novel di2 rection of studies in home and abrad. The developping trend is discussed assumably in the end. The pollution of automobile epilogue has been doing bad harm to our living space step by step. The developed countries began to explore the route of automobile epilogue cleanse from 1960s and they have got satisfactory result . In China ,gasoline without lead has been used.But it’s just an outset and in - depth studies must be outspreaded. The oxygen sensors are currently utilized in auto2 mobiles to monitorthe exhaust gas composition and control the air - to - fuel ratio ,thus reducing harmful emission compo2 nents and improving fuel economy. Cubic phase zirconia solid electroyte stabilized by yttrium(etc) has favorable oxygen ionic conductance in high temperautre circumstance ,so it has been produced into oxygen sensors used in auto widely. Oxy2 gen sensors used in auto has two types :oxygenic concentratin difference cell sensors and limiting current sensors. The study and production of home - made oxygen sensors has had a certain extent scale. And a new type oxygen sensors with chemi2 cal diffusencess barrier manufactured in other nation is introduced also.
Key Words :Zirconia Oxygen Sensor ;Oxygenic Concentration Diference Cell Sensors ;Limiting Current Sensors ;Oxygen Ionic Conductance