負(fu)(fu)溫(wen)(wen)(wen)(wen)度(du)(du)系(xi)(xi)數(shu)(shu)熱(re)(re)敏(min)(min)(min)電(dian)(dian)阻(zu)(zu)的工(gong)(gong)作原理：NTC泛指負(fu)(fu)溫(wen)(wen)(wen)(wen)度(du)(du)系(xi)(xi)數(shu)(shu)很大的半(ban)導體(ti)材料(liao)或元器件,所謂NTC熱(re)(re)敏(min)(min)(min)電(dian)(dian)阻(zu)(zu)就是負(fu)(fu)溫(wen)(wen)(wen)(wen)度(du)(du)系(xi)(xi)數(shu)(shu)熱(re)(re)敏(min)(min)(min)電(dian)(dian)阻(zu)(zu)。負(fu)(fu)溫(wen)(wen)(wen)(wen)度(du)(du)系(xi)(xi)數(shu)(shu)熱(re)(re)敏(min)(min)(min)電(dian)(dian)阻(zu)(zu)是以(yi)氧化(hua)錳、氧化(hua)鉆、氧化(hua)鎳、氧化(hua)銅(tong)和(he)氧化(hua)鋁等(deng)金屬氧化(hua)物(wu)為(wei)主要原料(liao),采(cai)用陶瓷(ci)工(gong)(gong)藝制造而成的。這些金屬氧化(hua)物(wu)材料(liao)都具(ju)有半(ban)導體(ti)性(xing)質,完全類(lei)似于儲(chu)、硅晶體(ti)材料(liao),體(ti)內(nei)的載流(liu)子(電(dian)(dian)子和(he)空穴)數(shu)(shu)目少,電(dian)(dian)阻(zu)(zu)較(jiao)高;溫(wen)(wen)(wen)(wen)度(du)(du)升高,體(ti)內(nei)載流(liu)子數(shu)(shu)目增加(jia),自然電(dian)(dian)阻(zu)(zu)值降(jiang)低。NTC熱(re)(re)敏(min)(min)(min)電(dian)(dian)阻(zu)(zu)在室溫(wen)(wen)(wen)(wen)下(xia)的變化(hua)范(fan)圍在100~100000,Ω溫(wen)(wen)(wen)(wen)度(du)(du)系(xi)(xi)數(shu)(shu)為(wei)一(yi)2%6.5%。負(fu)(fu)溫(wen)(wen)(wen)(wen)度(du)(du)系(xi)(xi)數(shu)(shu)熱(re)(re)敏(min)(min)(min)電(dian)(dian)阻(zu)(zu)類(lei)型(xing)很多,按溫(wen)(wen)(wen)(wen)度(du)(du)范(fan)圍分(fen)為(wei)低溫(wen)(wen)(wen)(wen)(-60~300℃)、中溫(wen)(wen)(wen)(wen)(300-600℃、高溫(wen)(wen)(wen)(wen)(>600℃)三種,有靈敏(min)(min)(min)度(du)(du)高、穩(wen)定性(xing)好、響應快、壽命長、價格低等(deng)優(you)點(dian),普遍應用于需要定點(dian)測溫(wen)(wen)(wen)(wen)的溫(wen)(wen)(wen)(wen)度(du)(du)自動(dong)控制電(dian)(dian)路,如(ru)冰(bing)箱、空調、溫(wen)(wen)(wen)(wen)室等(deng)的溫(wen)(wen)(wen)(wen)控系(xi)(xi)統。熱(re)(re)敏(min)(min)(min)電(dian)(dian)阻(zu)(zu)的響應速度(du)(du)相對較(jiao)慢。南(nan)京(jing)電(dian)(dian)飯鍋熱(re)(re)敏(min)(min)(min)電(dian)(dian)阻(zu)(zu)訂制廠家

熱(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)器正是利用(yong)半導體的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)值隨溫(wen)度(du)(du)明(ming)顯變化(hua)這(zhe)一特性制成的(de)(de)(de)熱(re)敏(min)(min)元(yuan)件(jian)。它是由某些金屬氧化(hua)物(wu)按不(bu)同(tong)的(de)(de)(de)配方(fang)制成的(de)(de)(de)。在(zai)一定(ding)的(de)(de)(de)溫(wen)度(du)(du)范圍(wei)內，根據測量(liang)熱(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)阻(zu)(zu)(zu)(zu)(zu)值的(de)(de)(de)變化(hua)，便可知被測介質(zhi)的(de)(de)(de)溫(wen)度(du)(du)變化(hua)。將熱(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)安裝在(zai)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中使用(yong)時，熱(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)在(zai)環(huan)境(jing)溫(wen)度(du)(du)相(xiang)(xiang)同(tong)時，動(dong)作(zuo)時間(jian)隨著電(dian)(dian)(dian)(dian)(dian)流的(de)(de)(de)增加(jia)而急劇(ju)縮(suo)短(duan);熱(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)在(zai)環(huan)境(jing)溫(wen)度(du)(du)相(xiang)(xiang)對較(jiao)高時具有更短(duan)的(de)(de)(de)動(dong)作(zuo)時間(jian)和較(jiao)小(xiao)的(de)(de)(de)維持電(dian)(dian)(dian)(dian)(dian)流及動(dong)作(zuo)電(dian)(dian)(dian)(dian)(dian)流。當(dang)(dang)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)正常工作(zuo)時，熱(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)溫(wen)度(du)(du)與室溫(wen)相(xiang)(xiang)近、電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)很小(xiao)，串聯(lian)在(zai)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中不(bu)會阻(zu)(zu)(zu)(zu)(zu)礙電(dian)(dian)(dian)(dian)(dian)流通(tong)過(guo);而當(dang)(dang)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)因故障而出現過(guo)電(dian)(dian)(dian)(dian)(dian)流時，熱(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)由于發熱(re)功率增加(jia)導致溫(wen)度(du)(du)上升，當(dang)(dang)溫(wen)度(du)(du)超過(guo)開關(guan)溫(wen)度(du)(du)時，電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)瞬間(jian)會劇(ju)增，回路(lu)(lu)中的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流迅(xun)速減小(xiao)到(dao)安全值。常州負溫(wen)度(du)(du)系數(shu)熱(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)報(bao)價(jia)表熱(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)的(de)(de)(de)特性曲(qu)線通(tong)常可以通(tong)過(guo)計算機仿真進行(xing)模擬和優化(hua)。

熱(re)敏(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)在(zai)(zai)實際的(de)(de)應用(yong)中(zhong)還(huan)是經常(chang)會(hui)(hui)發(fa)(fa)生一些安全(quan)事(shi)故(gu)的(de)(de)，引起(qi)這種事(shi)故(gu)的(de)(de)原因主要有兩個(ge)：（1）熱(re)敏(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)自身的(de)(de)老化(hua)使它失(shi)(shi)去功效(xiao)。PTC熱(re)敏(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)主要是用(yong)來阻(zu)(zu)(zu)攔電(dian)(dian)(dian)(dian)流(liu)的(de)(de)，如果它失(shi)(shi)去了(le)這個(ge)功效(xiao)造成(cheng)電(dian)(dian)(dian)(dian)流(liu)的(de)(de)突然爆發(fa)(fa)就會(hui)(hui)釀(niang)成(cheng)危險(xian)(xian)事(shi)故(gu)。由于電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)是一種元器件(jian)，在(zai)(zai)使用(yong)久了(le)就會(hui)(hui)老化(hua)，不(bu)(bu)注意檢(jian)查的(de)(de)話就會(hui)(hui)造成(cheng)事(shi)故(gu)的(de)(de)發(fa)(fa)生。所以(yi)說(shuo)熱(re)敏(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)在(zai)(zai)使用(yong)的(de)(de)過程中(zhong)一定要經常(chang)性地(di)進(jin)行(xing)檢(jian)查。（2）超高電(dian)(dian)(dian)(dian)壓使電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)遭到破壞。在(zai)(zai)運行(xing)的(de)(de)過程中(zhong)，時常(chang)會(hui)(hui)有超高電(dian)(dian)(dian)(dian)壓出(chu)現，這時由于電(dian)(dian)(dian)(dian)壓的(de)(de)突然升高造成(cheng)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)的(de)(de)破壞，使電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)燒(shao)毀而失(shi)(shi)效(xiao)，不(bu)(bu)能進(jin)行(xing)電(dian)(dian)(dian)(dian)流(liu)的(de)(de)阻(zu)(zu)(zu)擋就會(hui)(hui)發(fa)(fa)生安全(quan)事(shi)故(gu)了(le)。所以(yi)平時在(zai)(zai)使用(yong)熱(re)敏(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)的(de)(de)時候一定要注意檢(jian)查，較好(hao)還(huan)是要裝上具有防范作用(yong)的(de)(de)保險(xian)(xian)絲，這樣就可以(yi)很大程度的(de)(de)降低安全(quan)事(shi)故(gu)發(fa)(fa)生的(de)(de)危險(xian)(xian)。

熱(re)(re)(re)敏(min)電(dian)(dian)阻(zu)是電(dian)(dian)阻(zu)溫(wen)(wen)(wen)度(du)(du)(du)計，或(huo)(huo)電(dian)(dian)阻(zu)取(qu)決于溫(wen)(wen)(wen)度(du)(du)(du)的(de)電(dian)(dian)阻(zu)。該(gai)術語是“熱(re)(re)(re)”和(he)“電(dian)(dian)阻(zu)”的(de)組合(he)。它由金屬氧化(hua)物制成(cheng)，壓(ya)成(cheng)珠子，圓(yuan)盤或(huo)(huo)圓(yuan)柱形(xing)，然后用(yong)不(bu)透氣(qi)的(de)材料如環(huan)氧樹(shu)脂(zhi)或(huo)(huo)玻璃(li)封(feng)裝。熱(re)(re)(re)敏(min)電(dian)(dian)阻(zu)的(de)類(lei)型有(you)(you)兩種：負溫(wen)(wen)(wen)度(du)(du)(du)系數（NTC）和(he)正溫(wen)(wen)(wen)度(du)(du)(du)系數（PTC）。使用(yong)NTC熱(re)(re)(re)敏(min)電(dian)(dian)阻(zu)，當溫(wen)(wen)(wen)度(du)(du)(du)升(sheng)高時(shi)，電(dian)(dian)阻(zu)會(hui)降(jiang)低(di)。相反(fan)，當溫(wen)(wen)(wen)度(du)(du)(du)降(jiang)低(di)時(shi)，電(dian)(dian)阻(zu)增加。這類(lei)熱(re)(re)(re)敏(min)電(dian)(dian)阻(zu)使用(yong)量(liang)較(jiao)多(duo)。PTC熱(re)(re)(re)敏(min)電(dian)(dian)阻(zu)的(de)工作(zuo)方式略有(you)(you)不(bu)同。當溫(wen)(wen)(wen)度(du)(du)(du)升(sheng)高時(shi)，電(dian)(dian)阻(zu)增加，而(er)當溫(wen)(wen)(wen)度(du)(du)(du)降(jiang)低(di)時(shi)，電(dian)(dian)阻(zu)降(jiang)低(di)。這種類(lei)型的(de)熱(re)(re)(re)敏(min)電(dian)(dian)阻(zu)通(tong)常用(yong)作(zuo)保(bao)險絲(si)。通(tong)常，熱(re)(re)(re)敏(min)電(dian)(dian)阻(zu)在目標溫(wen)(wen)(wen)度(du)(du)(du)附近約50C的(de)有(you)(you)限溫(wen)(wen)(wen)度(du)(du)(du)范(fan)圍內實現高精(jing)度(du)(du)(du)。該(gai)范(fan)圍取(qu)決于基極電(dian)(dian)阻(zu)。熱(re)(re)(re)敏(min)電(dian)(dian)阻(zu)可通(tong)過(guo)多(duo)種方式用(yong)于溫(wen)(wen)(wen)度(du)(du)(du)控(kong)制和(he)測量(liang)。

NTC熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻是(shi)什么？NTC意思是(shi)負溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)系(xi)數(shu)。一般(ban)指負溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)系(xi)數(shu)大的(de)(de)(de)半導體材料或元件。所謂NTC熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻就是(shi)負溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)系(xi)數(shu)。它由(you)錳、鈷(gu)、鎳(nie)和銅等金屬制成。氧化(hua)物為主要研究材料，采用傳統陶瓷生產(chan)工(gong)藝設計制造而成的(de)(de)(de)。NTC熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻根據(ju)(ju)結構和形狀的(de)(de)(de)分(fen)類(lei)-圓片(片)、圓筒(柱)、圓環(墊片)和其他熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻；根據(ju)(ju)對溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)變(bian)(bian)化(hua)的(de)(de)(de)敏(min)(min)(min)(min)(min)(min)感度(du)(du)(du)分(fen)類(lei)——高敏(min)(min)(min)(min)(min)(min)感度(du)(du)(du)型(突變(bian)(bian)型)、低敏(min)(min)(min)(min)(min)(min)感度(du)(du)(du)型型（緩變(bian)(bian)型）熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻器(qi)；根據(ju)(ju)受熱(re)(re)(re)(re)處理(li)方式進行分(fen)類(lei)——直熱(re)(re)(re)(re)式熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻器(qi)、旁熱(re)(re)(re)(re)式熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻器(qi)；根據(ju)(ju)溫(wen)(wen)(wen)(wen)(wen)(wen)變(bian)(bian)（溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)環境變(bian)(bian)化(hua)）特性以及分(fen)類(lei)——正溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)影響系(xi)數(shu)（PTC）、負正溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)相關系(xi)數(shu)（NTC）熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻器(qi)。熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻在環境溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)相對較高時具有更短的(de)(de)(de)動(dong)作(zuo)(zuo)時間和較小的(de)(de)(de)維持電(dian)(dian)(dian)(dian)流及動(dong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)流。常州負溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)系(xi)數(shu)熱(re)(re)(re)(re)敏(min)(min)(min)(min)(min)(min)電(dian)(dian)(dian)(dian)阻報價表

熱敏電阻的響應時間與其(qi)靈敏度(du)和溫度(du)系數有(you)關。南(nan)京電飯鍋熱敏電阻訂制廠家(jia)

正溫(wen)(wen)(wen)度(du)(du)系(xi)數(shu)熱(re)敏(min)電(dian)(dian)(dian)(dian)(dian)阻：鈦(tai)(tai)酸(suan)(suan)鋇半導瓷的(de)(de)PTC效(xiao)應(ying)起因于粒(li)界（晶粒(li)間界）。對于導電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)子(zi)來說，晶粒(li)間界面相當(dang)于一個勢(shi)(shi)壘(lei)(lei)。當(dang)溫(wen)(wen)(wen)度(du)(du)低時，由(you)于鈦(tai)(tai)酸(suan)(suan)鋇內電(dian)(dian)(dian)(dian)(dian)場的(de)(de)作用，導致電(dian)(dian)(dian)(dian)(dian)子(zi)極容(rong)易越過勢(shi)(shi)壘(lei)(lei)，則電(dian)(dian)(dian)(dian)(dian)阻值較小(xiao)。當(dang)溫(wen)(wen)(wen)度(du)(du)升高(gao)到居(ju)里溫(wen)(wen)(wen)度(du)(du)（即臨界溫(wen)(wen)(wen)度(du)(du)）附近時，內電(dian)(dian)(dian)(dian)(dian)場受到破壞，它(ta)不能幫助導電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)子(zi)越過勢(shi)(shi)壘(lei)(lei)。這相當(dang)于勢(shi)(shi)壘(lei)(lei)升高(gao)，電(dian)(dian)(dian)(dian)(dian)阻值突(tu)然(ran)增大，產生PTC效(xiao)應(ying)。鈦(tai)(tai)酸(suan)(suan)鋇半導瓷的(de)(de)PTC效(xiao)應(ying)的(de)(de)物理模(mo)型(xing)(xing)(xing)有(you)海望表(biao)面勢(shi)(shi)壘(lei)(lei)模(mo)型(xing)(xing)(xing)、丹(dan)尼(ni)爾(er)斯等人的(de)(de)鋇缺位模(mo)型(xing)(xing)(xing)和疊(die)加勢(shi)(shi)壘(lei)(lei)模(mo)型(xing)(xing)(xing)，它(ta)們分別(bie)從(cong)不同(tong)方面對PTC效(xiao)應(ying)作出了合理解釋。南京電(dian)(dian)(dian)(dian)(dian)飯鍋熱(re)敏(min)電(dian)(dian)(dian)(dian)(dian)阻訂(ding)制廠家

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