一、陶瓷電容是什么

陶瓷電容是指用(yong)(yong)高介電(dian)(dian)(dian)常數的電(dian)(dian)(dian)容(rong)器(qi)(qi)陶瓷(ci)(ci)(ci)鈦酸鋇(bei)一氧化(hua)鈦擠壓成(cheng)圓(yuan)(yuan)管(guan)、圓(yuan)(yuan)片或圓(yuan)(yuan)盤作(zuo)為(wei)介質，并(bing)用(yong)(yong)燒(shao)滲法將銀鍍在(zai)(zai)陶瓷(ci)(ci)(ci)上作(zuo)為(wei)電(dian)(dian)(dian)極制成(cheng)。它又分高頻(pin)瓷(ci)(ci)(ci)介和(he)低頻(pin)瓷(ci)(ci)(ci)介兩種(zhong)。具有(you)小的正電(dian)(dian)(dian)容(rong)溫度系數的電(dian)(dian)(dian)容(rong)器(qi)(qi)，用(yong)(yong)于高穩定振蕩回路(lu)中，作(zuo)為(wei)回路(lu)電(dian)(dian)(dian)容(rong)器(qi)(qi)及(ji)墊整電(dian)(dian)(dian)容(rong)器(qi)(qi)。低頻(pin)瓷(ci)(ci)(ci)介電(dian)(dian)(dian)容(rong)器(qi)(qi)限于在(zai)(zai)工(gong)作(zuo)頻(pin)率較低的回路(lu)中作(zuo)旁路(lu)或隔直流(liu)用(yong)(yong)，或對穩定性(xing)和(he)損耗要(yao)求(qiu)不高的場合(he)(包括高頻(pin)在(zai)(zai)內)。這種(zhong)電(dian)(dian)(dian)容(rong)器(qi)(qi)不宜使用(yong)(yong)在(zai)(zai)脈沖電(dian)(dian)(dian)路(lu)中，因為(wei)它們(men)易于被脈沖電(dian)(dian)(dian)壓擊穿。

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二、瓷片電容怎么分類

1、按介質材料(liao)可(ke)分為：高介電(dian)(dian)(dian)常數(shu)電(dian)(dian)(dian)容(rong)器(qi)和低(di)介電(dian)(dian)(dian)常數(shu)電(dian)(dian)(dian)容(rong)器(qi)。

2、按(an)工(gong)作頻率可(ke)分為：高(gao)頻瓷介電容器和低(di)頻瓷介電容器。

3、按工作電壓可分為：高壓瓷(ci)介(jie)電容器（1KVDC以(yi)(yi)上）和(he)低(di)壓瓷(ci)介(jie)電容器（500VDC以(yi)(yi)下）。

4、按外形(xing)(xing)(xing)結構可分為：圓片形(xing)(xing)(xing)、管形(xing)(xing)(xing)、穿心式(shi)、筒(tong)形(xing)(xing)(xing)以及疊片式(shi)等。

5、按瓷介(jie)電(dian)(dian)(dian)容電(dian)(dian)(dian)介(jie)質又分：I類(lei)瓷介(jie)電(dian)(dian)(dian)容、II類(lei)瓷介(jie)電(dian)(dian)(dian)容、III類(lei)瓷介(jie)電(dian)(dian)(dian)容。

I類瓷介(jie)(jie)電容(rong)(rong)：NP0，SL0，C0G。I類瓷介(jie)(jie)電容(rong)(rong)容(rong)(rong)量穩定(ding)性很好，基本不(bu)隨溫(wen)度，電壓(ya)，時間等變化而變化，但是一(yi)般容(rong)(rong)量都很小。

II類瓷(ci)(ci)介(jie)電容(rong)(rong)：X7R，X5R，Y5U，Y5V，2X1。II類瓷(ci)(ci)介(jie)電容(rong)(rong)容(rong)(rong)量穩定性很差(cha)，隨著溫(wen)度，電壓，時間變(bian)化(hua)幅度較大(da)，所以一般用在對容(rong)(rong)量穩定性要(yao)求(qiu)不高的場合，如濾波等。

III類瓷(ci)介電容(rong)：Y5V，2F4，瓷(ci)介電容(rong)器EIA RS-198。