負(fu)溫度(du)(du)(du)(du)(du)(du)系(xi)數(shu)(shu)熱(re)(re)(re)敏(min)(min)(min)(min)電(dian)(dian)(dian)阻(zu)(zu)的(de)(de)工作原理：NTC泛指(zhi)負(fu)溫度(du)(du)(du)(du)(du)(du)系(xi)數(shu)(shu)很大的(de)(de)半導體(ti)(ti)(ti)材(cai)(cai)料或元器件,所謂NTC熱(re)(re)(re)敏(min)(min)(min)(min)電(dian)(dian)(dian)阻(zu)(zu)就(jiu)是負(fu)溫度(du)(du)(du)(du)(du)(du)系(xi)數(shu)(shu)熱(re)(re)(re)敏(min)(min)(min)(min)電(dian)(dian)(dian)阻(zu)(zu)。負(fu)溫度(du)(du)(du)(du)(du)(du)系(xi)數(shu)(shu)熱(re)(re)(re)敏(min)(min)(min)(min)電(dian)(dian)(dian)阻(zu)(zu)是以氧(yang)(yang)化(hua)(hua)錳(meng)、氧(yang)(yang)化(hua)(hua)鉆、氧(yang)(yang)化(hua)(hua)鎳、氧(yang)(yang)化(hua)(hua)銅和氧(yang)(yang)化(hua)(hua)鋁等(deng)金屬氧(yang)(yang)化(hua)(hua)物為(wei)主要(yao)原料,采用(yong)(yong)陶瓷工藝制造而成(cheng)的(de)(de)。這些金屬氧(yang)(yang)化(hua)(hua)物材(cai)(cai)料都具有(you)半導體(ti)(ti)(ti)性質,完全類似于儲、硅晶體(ti)(ti)(ti)材(cai)(cai)料,體(ti)(ti)(ti)內(nei)的(de)(de)載(zai)流(liu)子(zi)(電(dian)(dian)(dian)子(zi)和空(kong)穴)數(shu)(shu)目少,電(dian)(dian)(dian)阻(zu)(zu)較高(gao);溫度(du)(du)(du)(du)(du)(du)升高(gao),體(ti)(ti)(ti)內(nei)載(zai)流(liu)子(zi)數(shu)(shu)目增加,自然(ran)電(dian)(dian)(dian)阻(zu)(zu)值降(jiang)低。NTC熱(re)(re)(re)敏(min)(min)(min)(min)電(dian)(dian)(dian)阻(zu)(zu)在室溫下的(de)(de)變化(hua)(hua)范圍在100~100000,Ω溫度(du)(du)(du)(du)(du)(du)系(xi)數(shu)(shu)為(wei)一2%6.5%。負(fu)溫度(du)(du)(du)(du)(du)(du)系(xi)數(shu)(shu)熱(re)(re)(re)敏(min)(min)(min)(min)電(dian)(dian)(dian)阻(zu)(zu)類型(xing)很多(duo),按溫度(du)(du)(du)(du)(du)(du)范圍分為(wei)低溫(-60~300℃)、中溫(300-600℃、高(gao)溫(>600℃)三種,有(you)靈敏(min)(min)(min)(min)度(du)(du)(du)(du)(du)(du)高(gao)、穩定(ding)性好、響應快(kuai)、壽命長(chang)、價(jia)格低等(deng)優點(dian),普遍應用(yong)(yong)于需(xu)要(yao)定(ding)點(dian)測溫的(de)(de)溫度(du)(du)(du)(du)(du)(du)自動控(kong)制電(dian)(dian)(dian)路,如冰(bing)箱、空(kong)調、溫室等(deng)的(de)(de)溫控(kong)系(xi)統。熱(re)(re)(re)敏(min)(min)(min)(min)電(dian)(dian)(dian)阻(zu)(zu)的(de)(de)響應速(su)度(du)(du)(du)(du)(du)(du)相對較慢(man)。南京電(dian)(dian)(dian)飯鍋熱(re)(re)(re)敏(min)(min)(min)(min)電(dian)(dian)(dian)阻(zu)(zu)訂制廠家

熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)器正(zheng)是利用半(ban)導體(ti)的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)值(zhi)隨溫(wen)(wen)度明(ming)顯(xian)變化(hua)這一特(te)性制(zhi)成的(de)(de)熱(re)(re)敏(min)(min)元件。它是由(you)某些(xie)金屬氧化(hua)物按不同的(de)(de)配方制(zhi)成的(de)(de)。在(zai)(zai)(zai)(zai)一定的(de)(de)溫(wen)(wen)度范(fan)圍(wei)內(nei)，根據測量熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)阻(zu)(zu)(zu)值(zhi)的(de)(de)變化(hua)，便可(ke)知被測介質的(de)(de)溫(wen)(wen)度變化(hua)。將熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)安裝在(zai)(zai)(zai)(zai)電(dian)(dian)(dian)(dian)(dian)路中(zhong)使(shi)用時(shi)(shi)，熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)在(zai)(zai)(zai)(zai)環境溫(wen)(wen)度相同時(shi)(shi)，動(dong)作時(shi)(shi)間隨著電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)增加而急劇縮短;熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)在(zai)(zai)(zai)(zai)環境溫(wen)(wen)度相對較高(gao)時(shi)(shi)具(ju)有更(geng)短的(de)(de)動(dong)作時(shi)(shi)間和較小(xiao)的(de)(de)維持電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)及動(dong)作電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。當電(dian)(dian)(dian)(dian)(dian)路正(zheng)常工作時(shi)(shi)，熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)溫(wen)(wen)度與室溫(wen)(wen)相近、電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)很小(xiao)，串聯在(zai)(zai)(zai)(zai)電(dian)(dian)(dian)(dian)(dian)路中(zhong)不會阻(zu)(zu)(zu)礙電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)通(tong)(tong)過;而當電(dian)(dian)(dian)(dian)(dian)路因故(gu)障而出現過電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)時(shi)(shi)，熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)由(you)于發熱(re)(re)功率增加導致溫(wen)(wen)度上升，當溫(wen)(wen)度超過開關(guan)溫(wen)(wen)度時(shi)(shi)，電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)瞬間會劇增，回路中(zhong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)迅速減(jian)小(xiao)到安全值(zhi)。常州(zhou)負溫(wen)(wen)度系(xi)數熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)報價表熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)的(de)(de)特(te)性曲線(xian)通(tong)(tong)常可(ke)以通(tong)(tong)過計算機仿(fang)真進行模(mo)擬(ni)和優(you)化(hua)。

熱(re)(re)敏電(dian)(dian)阻在(zai)實(shi)際的(de)應用中還是(shi)(shi)(shi)經(jing)常(chang)會(hui)發(fa)生(sheng)一些安全事故的(de)，引(yin)起這種事故的(de)原(yuan)因主要有(you)兩(liang)個(ge)(ge)：（1）熱(re)(re)敏電(dian)(dian)阻自身的(de)老化使(shi)(shi)它(ta)失(shi)(shi)去(qu)功(gong)效。PTC熱(re)(re)敏電(dian)(dian)阻主要是(shi)(shi)(shi)用來阻攔電(dian)(dian)流的(de)，如(ru)果它(ta)失(shi)(shi)去(qu)了這個(ge)(ge)功(gong)效造(zao)成(cheng)電(dian)(dian)流的(de)突(tu)然(ran)爆(bao)發(fa)就會(hui)釀成(cheng)危險事故。由(you)于(yu)電(dian)(dian)阻是(shi)(shi)(shi)一種元器件，在(zai)使(shi)(shi)用久了就會(hui)老化，不注(zhu)意(yi)檢(jian)查(cha)的(de)話就會(hui)造(zao)成(cheng)事故的(de)發(fa)生(sheng)。所以(yi)說熱(re)(re)敏電(dian)(dian)阻在(zai)使(shi)(shi)用的(de)過程(cheng)中一定要經(jing)常(chang)性地進行(xing)檢(jian)查(cha)。（2）超(chao)高(gao)電(dian)(dian)壓使(shi)(shi)電(dian)(dian)阻遭到(dao)破壞。在(zai)運行(xing)的(de)過程(cheng)中，時常(chang)會(hui)有(you)超(chao)高(gao)電(dian)(dian)壓出(chu)現，這時由(you)于(yu)電(dian)(dian)壓的(de)突(tu)然(ran)升(sheng)高(gao)造(zao)成(cheng)電(dian)(dian)阻的(de)破壞，使(shi)(shi)電(dian)(dian)阻燒毀而失(shi)(shi)效，不能進行(xing)電(dian)(dian)流的(de)阻擋就會(hui)發(fa)生(sheng)安全事故了。所以(yi)平時在(zai)使(shi)(shi)用熱(re)(re)敏電(dian)(dian)阻的(de)時候一定要注(zhu)意(yi)檢(jian)查(cha)，較(jiao)好還是(shi)(shi)(shi)要裝(zhuang)上(shang)具(ju)有(you)防范作用的(de)保險絲，這樣就可以(yi)很大程(cheng)度的(de)降(jiang)低安全事故發(fa)生(sheng)的(de)危險。

熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)是(shi)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)溫(wen)(wen)度(du)計，或(huo)(huo)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)取(qu)(qu)決(jue)(jue)于溫(wen)(wen)度(du)的(de)(de)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)。該術(shu)語是(shi)“熱(re)(re)”和“電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)”的(de)(de)組合(he)。它由(you)金屬氧(yang)化物(wu)制(zhi)成，壓成珠子，圓(yuan)盤或(huo)(huo)圓(yuan)柱形，然后用(yong)(yong)(yong)不透氣(qi)的(de)(de)材料如環氧(yang)樹脂或(huo)(huo)玻璃(li)封裝。熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)的(de)(de)類(lei)型有兩種(zhong)：負(fu)溫(wen)(wen)度(du)系數(shu)（NTC）和正溫(wen)(wen)度(du)系數(shu)（PTC）。使(shi)用(yong)(yong)(yong)NTC熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)，當(dang)溫(wen)(wen)度(du)升(sheng)高時(shi)，電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)會降低。相反(fan)，當(dang)溫(wen)(wen)度(du)降低時(shi)，電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)增加。這(zhe)類(lei)熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)使(shi)用(yong)(yong)(yong)量較(jiao)多(duo)。PTC熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)的(de)(de)工作方式略(lve)有不同。當(dang)溫(wen)(wen)度(du)升(sheng)高時(shi)，電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)增加，而當(dang)溫(wen)(wen)度(du)降低時(shi)，電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)降低。這(zhe)種(zhong)類(lei)型的(de)(de)熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)通常用(yong)(yong)(yong)作保險(xian)絲。通常，熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)在目(mu)標溫(wen)(wen)度(du)附近約50C的(de)(de)有限溫(wen)(wen)度(du)范圍(wei)內(nei)實(shi)現高精度(du)。該范圍(wei)取(qu)(qu)決(jue)(jue)于基極電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)。熱(re)(re)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)(zu)(zu)可(ke)通過多(duo)種(zhong)方式用(yong)(yong)(yong)于溫(wen)(wen)度(du)控(kong)制(zhi)和測量。

NTC熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)是什么？NTC意(yi)思是負(fu)溫(wen)度(du)(du)系(xi)(xi)數(shu)(shu)。一般指負(fu)溫(wen)度(du)(du)系(xi)(xi)數(shu)(shu)大的(de)(de)半導體材料(liao)(liao)或(huo)元件(jian)。所謂(wei)NTC熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)就是負(fu)溫(wen)度(du)(du)系(xi)(xi)數(shu)(shu)。它(ta)由錳、鈷(gu)、鎳和銅等金屬(shu)制(zhi)成(cheng)。氧(yang)化(hua)物為主要研究材料(liao)(liao)，采用傳統陶瓷生產工(gong)藝設(she)計(ji)制(zhi)造而成(cheng)的(de)(de)。NTC熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)根(gen)據(ju)結(jie)構和形(xing)狀的(de)(de)分類(lei)-圓片(片)、圓筒(tong)(柱)、圓環(墊片)和其他熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)；根(gen)據(ju)對溫(wen)度(du)(du)變化(hua)的(de)(de)敏(min)感度(du)(du)分類(lei)——高敏(min)感度(du)(du)型(xing)(突變型(xing))、低敏(min)感度(du)(du)型(xing)型(xing)（緩變型(xing)）熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)器(qi)(qi)；根(gen)據(ju)受熱(re)處理(li)方式(shi)進(jin)行分類(lei)——直熱(re)式(shi)熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)器(qi)(qi)、旁熱(re)式(shi)熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)器(qi)(qi)；根(gen)據(ju)溫(wen)變（溫(wen)度(du)(du)環境變化(hua)）特性(xing)以及分類(lei)——正溫(wen)度(du)(du)影響系(xi)(xi)數(shu)(shu)（PTC）、負(fu)正溫(wen)度(du)(du)相關系(xi)(xi)數(shu)(shu)（NTC）熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)器(qi)(qi)。熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)在環境溫(wen)度(du)(du)相對較高時具有更(geng)短(duan)的(de)(de)動作(zuo)時間和較小的(de)(de)維(wei)持電(dian)流及動作(zuo)電(dian)流。常州負(fu)溫(wen)度(du)(du)系(xi)(xi)數(shu)(shu)熱(re)敏(min)電(dian)阻(zu)(zu)(zu)(zu)報價表

熱敏(min)電(dian)阻(zu)的響應時間(jian)與其靈敏(min)度和溫度系數有關。南京電(dian)飯鍋熱敏(min)電(dian)阻(zu)訂制廠家(jia)

正溫(wen)度(du)系數熱(re)敏(min)電阻：鈦(tai)酸(suan)鋇半(ban)導(dao)瓷(ci)的PTC效(xiao)應起因(yin)于(yu)粒(li)界（晶粒(li)間界）。對于(yu)導(dao)電電子來說，晶粒(li)間界面相當(dang)于(yu)一個勢(shi)(shi)壘(lei)。當(dang)溫(wen)度(du)低時(shi)(shi)，由于(yu)鈦(tai)酸(suan)鋇內電場的作(zuo)用，導(dao)致(zhi)電子極容易越過勢(shi)(shi)壘(lei)，則電阻值較小。當(dang)溫(wen)度(du)升高到居里溫(wen)度(du)（即臨界溫(wen)度(du)）附(fu)近(jin)時(shi)(shi)，內電場受(shou)到破(po)壞，它不能幫助(zhu)導(dao)電電子越過勢(shi)(shi)壘(lei)。這(zhe)相當(dang)于(yu)勢(shi)(shi)壘(lei)升高，電阻值突然增大，產生PTC效(xiao)應。鈦(tai)酸(suan)鋇半(ban)導(dao)瓷(ci)的PTC效(xiao)應的物理(li)模(mo)型(xing)有海望表面勢(shi)(shi)壘(lei)模(mo)型(xing)、丹(dan)尼爾斯等人的鋇缺位模(mo)型(xing)和疊加勢(shi)(shi)壘(lei)模(mo)型(xing)，它們(men)分別(bie)從不同(tong)方(fang)面對PTC效(xiao)應作(zuo)出了合理(li)解釋(shi)。南(nan)京電飯(fan)鍋(guo)熱(re)敏(min)電阻訂制廠(chang)家

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