服務熱線
服務熱線
作者:點擊數(shu):發布時間:2020-05-20
與(yu)其他電解(jie)電容(rong)器-樣,貼片鉭電容(rong)由陽極(ji)(ji)(ji)(ji)(ji)-一些電解(jie)質(zhi)和陰(yin)極(ji)(ji)(ji)(ji)(ji)組成(cheng),陽極(ji)(ji)(ji)(ji)(ji)與(yu)陰(yin)極(ji)(ji)(ji)(ji)(ji)隔離,因此只有(you)非常(chang)小的泄漏(lou)DC電流可以流過電容(rong)器。陽極(ji)(ji)(ji)(ji)(ji)由純鉭金屬(shu)制成(cheng)。將金屬(shu)研(yan)磨成(cheng)細(xi)粉(fen),并在高(gao)溫下燒結成(cheng)顆(ke)粒。這(zhe)形成(cheng)了具有(you)高(gao)表面積的非常(chang)多孔的陽極(ji)(ji)(ji)(ji)(ji)。高(gao)表面積直接轉換為(wei)增加的電容(rong)值(zhi)。
然后用一(yi)-層絕(jue)緣氧(yang)化物(wu)覆蓋陽極(ji),該絕(jue)緣氧(yang)化物(wu)用作(zuo)電介(jie)質(zhi)。該過程(cheng)稱(cheng)為陽極(ji)氧(yang)化。必須精確控制該步驟(zou)以減小(xiao)公差并確保(bao)正確的電容(rong)值,因為氧(yang)化物(wu)生長的程(cheng)度(du)決定了(le)電介(jie)質(zhi)厚(hou)度(du)。
在固體(ti)(ti)貼(tie)片(pian)(pian)鉭(tan)(tan)電(dian)(dian)容的(de)(de)情況下(xia),通過(guo)熱解(jie)將電(dian)(dian)解(jie)質(zhi)(zhi)添加到陽極(ji)(ji)中。然后(hou)將固體(ti)(ti)貼(tie)片(pian)(pian)鉭(tan)(tan)電(dian)(dian)容浸(jin)入特殊(shu)溶液(ye)中并(bing)在烘(hong)箱(xiang)中烘(hong)烤以產生二氧(yang)化(hua)錳涂層(ceng)(ceng)。重復該過(guo)程,直到在顆(ke)粒的(de)(de)所有內表面和外表面上存在厚(hou)涂層(ceng)(ceng)。最后(hou),將固體(ti)(ti)貼(tie)片(pian)(pian)鉭(tan)(tan)電(dian)(dian)容中使(shi)用(yong)(yong)的(de)(de)顆(ke)粒浸(jin)入石墨和銀中,以提供良好的(de)(de)陰極(ji)(ji)連接。與固體(ti)(ti)貼(tie)片(pian)(pian)鉭(tan)(tan)電(dian)(dian)容相(xiang)比,濕(shi)式(shi)(shi)貼(tie)片(pian)(pian)鉭(tan)(tan)電(dian)(dian)容使(shi)用(yong)(yong)液(ye)體(ti)(ti)電(dian)(dian)解(jie)質(zhi)(zhi)。在生長介電(dian)(dian)層(ceng)(ceng)之后(hou),將其浸(jin)入外殼(ke)內的(de)(de)液(ye)體(ti)(ti)電(dian)(dian)解(jie)質(zhi)(zhi)中。外殼(ke)和電(dian)(dian)解(jie)質(zhi)(zhi)一起用(yong)(yong)作濕(shi)式(shi)(shi)貼(tie)片(pian)(pian)鉭(tan)(tan)電(dian)(dian)容中的(de)(de)陰極(ji)(ji)
使(shi)用(yong)(yong)(yong)貼(tie)片鉭(tan)電(dian)(dian)(dian)容(rong)的(de)(de)應用(yong)(yong)(yong)利用(yong)(yong)(yong)它(ta)的(de)(de)低(di)漏(lou)電(dian)(dian)(dian)流,高(gao)容(rong)量和長期穩(wen)定性和可靠性。例如,它(ta)們(men)(men)用(yong)(yong)(yong)于采樣和保持電(dian)(dian)(dian)路,其依賴于低(di)泄漏(lou)電(dian)(dian)(dian)流以(yi)實現長保持持續時間(jian)。它(ta)們(men)(men)還(huan)通(tong)常用(yong)(yong)(yong)于計算機(ji)主板(ban)和手機(ji)上(shang)的(de)(de)電(dian)(dian)(dian)源過濾,因(yin)為(wei)它(ta)們(men)(men)尺寸小且(qie)長期穩(wen)定,通(tong)常以(yi)表面安裝形(xing)式。貼(tie)片鉭(tan)電(dian)(dian)(dian)容(rong)也(ye)(ye)有軍用(yong)(yong)(yong)規(gui)格(ge)(ge)版(ban)本可提供更嚴格(ge)(ge)的(de)(de)公差和更寬的(de)(de)工作溫度范圍。它(ta)們(men)(men)是軍事應用(yong)(yong)(yong)中鋁電(dian)(dian)(dian)解質的(de)(de)流行(xing)替(ti)代品,因(yin)為(wei)它(ta)們(men)(men)不會隨著時間(jian)的(de)(de)推(tui)移而變干并(bing)改變電(dian)(dian)(dian)容(rong)。醫療電(dian)(dian)(dian)子產品也(ye)(ye)因(yin)其高(gao)穩(wen)定性而依賴于貼(tie)片鉭(tan)電(dian)(dian)(dian)容(rong)。
貼(tie)片(pian)鉭(tan)(tan)電(dian)容(rong)是屬于(yu)有極性電(dian)容(rong),所以(yi)必(bi)須要(yao)識別其方(fang)向(xiang)(xiang),不可隨意安(an)裝,否則很(hen)容(rong)易造成爆(bao)炸現象(xiang)。那么究(jiu)竟貼(tie)片(pian)鉭(tan)(tan)電(dian)容(rong)方(fang)向(xiang)(xiang)識別有怎(zen)樣(yang)的方(fang)法呢?
貼(tie)片鉭電(dian)(dian)(dian)容(rong)(rong)是一種用金(jin)屬(shu)(shu)鉭(Ta)作為陽極材料而(er)制成的電(dian)(dian)(dian)解電(dian)(dian)(dian)容(rong)(rong)電(dian)(dian)(dian)解電(dian)(dian)(dian)容(rong)(rong)的供應商(shang)(shang)。使(shi)用金(jin)屬(shu)(shu)鉭做介質,不像普通電(dian)(dian)(dian)解電(dian)(dian)(dian)容(rong)(rong)那樣使(shi)用電(dian)(dian)(dian)解液,很適合在(zai)高溫下工作,是電(dian)(dian)(dian)容(rong)(rong)器電(dian)(dian)(dian)容(rong)(rong)器的供應商(shang)(shang)中體積(ji)小而(er)又能達到(dao)較大電(dian)(dian)(dian)容(rong)(rong)量的產品。
貼(tie)(tie)片鉭電容(rong)的(de)(de)(de)(de)封裝是分為A型(xing)(3216),B型(xing)(3528),C型(xing)(6032),D型(xing)(7343),E型(xing)(7845)。有斜角的(de)(de)(de)(de)是表示正極(ji),撥碼(ma)開關、晶振:等在市場都可(ke)(ke)(ke)以找(zhao)到不(bu)同規格的(de)(de)(de)(de)貼(tie)(tie)片封裝,其性能(neng)價(jia)格會根據(ju)他們(men)的(de)(de)(de)(de)引腳鍍(du)層、標稱頻率以及(ji)段位(wei)相(xiang)(xiang)關聯(lian)。電阻:和無極(ji)性電容(rong)相(xiang)(xiang)仿(fang),最為常見(jian)的(de)(de)(de)(de)有0805、0603兩類,不(bu)同的(de)(de)(de)(de)是,她可(ke)(ke)(ke)以以排阻的(de)(de)(de)(de)身(shen)份(fen)出(chu)現(xian),四位(wei)、八(ba)位(wei)都有,具體封裝樣式可(ke)(ke)(ke)參照(zhao)MD16仿(fang)真(zhen)版,也(ye)可(ke)(ke)(ke)以到設(she)計所(suo)內部PCB庫查(cha)詢。
貼片(pian)鉭電容具(ju)有單向導電性(xing)(xing),即(ji)所謂有“極(ji)性(xing)(xing)”,應用時應按電源(yuan)的正(zheng)、負(fu)方向接(jie)入電流(liu)(liu),電容器(qi)的陽極(ji)(正(zheng)極(ji))接(jie)電源(yuan)“+”極(ji),陰極(ji)(負(fu)極(ji))接(jie)電源(yuan)的“-”極(ji);如果接(jie)錯不僅電容器(qi)發(fa)(fa)揮不了作用,而且漏電流(liu)(liu)很大,短(duan)時間內芯子就會發(fa)(fa)熱,破壞氧化(hua)膜隨即(ji)失效。
貼片鉭電容方(fang)向(xiang)識別(bie)的(de)(de)(de)方(fang)法是比較簡單的(de)(de)(de)。但是對于沒有標志(zhi)的(de)(de)(de)則可(ke)以根據專用工具來進行(xing)檢測(ce),可(ke)以檢測(ce)出鉭電容的(de)(de)(de)正負(fu)極,確保正負(fu)極的(de)(de)(de)連(lian)接正確。避(bi)免因為正負(fu)極連(lian)接的(de)(de)(de)問題導致(zhi)出現(xian)大故障。