- 學位論文
加入8YSZ(8mol%Y2O3 and 92mol%ZrO2)改善Ni0.3Cu0.3Co0.06Mn2.34O4 NTC 熱敏電阻 時效穩定性
Add 8YSZ(8mol%Y2O3 and 92mol%ZrO2) to improve aging of Ni0.3Cu0.3Co0.06Mn2.34O4 NTC thermistor
摘要
中 文 摘 要 具有尖晶石結構之(Mn,Ni)3O4氧化物陶瓷體。其電阻會隨著溫度上升而急速下降，此特性被運用於負溫度係數(Negative Temperature Coefficience,NTC)熱敏電阻元件；(Mn,Ni)3O4之NTC材料屬於高阻值電阻體，在工業應用範圍上有其限制，故業界致力於開發低阻值NTC以期增加應用性。業界的作法是在以(Mn,Ni)3O4為主之材料上添加Cu取代部份Ni以達到降低阻值之效果，但由文獻得知雖然Cu的加入的確能降低阻值，不過卻造成在高溫環境下使用時其阻值穩定性變差的問題；故本實驗採用加入與(Mn,Ni,Cu)3O4同為cubic相之8YSZ（8mol％Y2O3與92mol％ZrO2），使得8YSZ固溶於(Mn,Ni,Cu)3O4晶體結構中，進而改變晶體結構增加其在高溫環境下使用之穩定性，由實驗結果得知當添加量在1％與3％的確使得(Mn,Ni)3O4添加Cu之問題明顯獲得改善。
並列摘要
Abstract The (Mn,Ni)3O4 oxide ceramic body has spinel structure. Its resistance will drop rapidly as temperature rises; this characteristic is applied to NTC (Negative Temperature Coefficience) thermal sensitive thermistor device. The (Mn,Ni)3O4 NTC material belongs to the high value resistance of thermistor, that is limited on the range of application of industry. Therefore, industries make efforts in developing low value resistance NTC to increase its application. The way of industries use is add Cu and replace some Ni to the main material, (Mn,Ni)3O4, in order to get the result of reducing the value of resistance. Learned by documents though Cu is it can reduce the value of resistance, the problem is its stability become poor under the high-temperature environment. This experiment is adopted and joined with (Mn,Ni,Cu)3O4 is all 8YSZ ( 8mol% Y2O3 and 92mol% ZrO2) the same of cubic phase, to make the solid solution of 8YSZ dissolve into (Mn,Ni,Cu)3O4; and then change its crystal structure and increase its stability used under high-temperature environment. The experimental result leads to the conclusion that acts as the adding amount of 3% and 1% 8YSZ really make the problem of adding Cu to (Mn,Ni)3O4 is being improved obviously.