瓷(ci)片電容有沒有正負(fu)極之分呢？

是屬于無極(ji)性(xing)電(dian)(dian)(dian)容，因此這種(zhong)電(dian)(dian)(dian)容在安裝過(guo)程中不需(xu)要區(qu)分(fen)正(zheng)(zheng)(zheng)負(fu)極(ji)。而對于普通常見級性(xing)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容器來(lai)說，則可(ke)(ke)以(yi)看其(qi)(qi)(qi)兩個腳長(chang)短，長(chang)的(de)(de)(de)是+，200度高溫(wen)高壓電(dian)(dian)(dian)容型號，短的(de)(de)(de)是-。貼片式鉭電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容器一般是可(ke)(ke)以(yi)根據(ju)其(qi)(qi)(qi)外觀來(lai)判斷，有色(se)帶的(de)(de)(de)一邊是正(zheng)(zheng)(zheng)極(ji)。其(qi)(qi)(qi)它無極(ji)性(xing)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容器、滌淪電(dian)(dian)(dian)容器、瓷片電(dian)(dian)(dian)容器、可(ke)(ke)變和微調電(dian)(dian)(dian)容器都(dou)沒有正(zheng)(zheng)(zheng)負(fu)極(ji)之分(fen)。

高(gao)頻陶瓷電(dian)(dian)容(rong)(rong)(rong)：它具有比較小的正電(dian)(dian)容(rong)(rong)(rong)溫度系數，260度高(gao)溫高(gao)壓電(dian)(dian)容(rong)(rong)(rong)型(xing)號，一(yi)般(ban)是應用于高(gao)穩定的震蕩回(hui)路(lu)中，并(bing)且充當回(hui)路(lu)電(dian)(dian)容(rong)(rong)(rong)和墊整電(dian)(dian)容(rong)(rong)(rong)的作(zuo)用。

低(di)頻陶瓷電容：它的使用(yong)范圍比(bi)較有限(xian)制，一般都是限(xian)于在(zai)工作頻率比(bi)較低(di)的回路中(zhong)使用(yong)，或者是在(zai)對穩(wen)定(ding)性要求(qiu)不(bu)高的回路中(zhong)使用(yong)。

陶瓷電容膨脹和變形

陶瓷電容在使(shi)用過程中，如果受到不當的外(wai)力作(zuo)用，如過度(du)擠壓、撞擊(ji)或振(zhen)動，可(ke)能會(hui)導(dao)致其(qi)內部(bu)結構受損(sun)，進而引發膨脹或變(bian)形。

陶瓷電容(rong)(rong)在工作過程中如果遭(zao)受(shou)過高的(de)電壓(ya)(ya)沖(chong)擊時，其內(nei)部介質可能會發生(sheng)擊穿現(xian)象。擊穿會導致電容(rong)(rong)器內(nei)部產生(sheng)熱量和氣體(ti)，從而使內(nei)部壓(ya)(ya)力(li)急劇增大，引(yin)發外殼膨脹或變形。嚴重的(de)過電壓(ya)(ya)沖(chong)擊，還可能導致電容(rong)(rong)器壞了。