A cikin labarin da ya gabata mun mayar da hankali kan ɗaya daga cikin hanyoyi guda biyu daban-daban na warkar da kai a cikin na'urorin ɗaukar fim ɗin ƙarfe: warkar da kai, wanda aka fi sani da warkar da kai mai ƙarfin lantarki. A cikin wannan labarin za mu duba wani nau'in warkar da kai, warkar da kai ta lantarki, wanda kuma galibi ana kiransa da warkar da kai mai ƙarancin ƙarfin lantarki.

Warkar da Kai ta hanyar amfani da na'urar lantarki

Irin wannan warkarwa ta kai-tsaye yakan faru ne a cikin capacitors na aluminum metalized film capacitor a ƙananan ƙarfin lantarki. Tsarin wannan warkarwa ta kai-tsaye shine kamar haka: idan akwai lahani a cikin fim ɗin dielectric na metalized film capacitor, bayan an ƙara ƙarfin lantarki zuwa capacitor (ko da ƙarfin lantarki yana da ƙasa sosai), za a sami babban malalar ɗigowa ta hanyar lahani, wanda aka bayyana yayin da juriyar kariya ta capacitor ta yi ƙasa da ƙimar da aka ƙayyade a cikin yanayin fasaha. Babu shakka, akwai malalar ionic da wataƙila malalar lantarki a cikin malalar ɗigowa. Saboda kowane nau'in fina-finan halitta suna da takamaiman adadin sha ruwa (0.01% zuwa 0.4%) kuma saboda capacitors na iya fuskantar danshi yayin ƙera su, adanawa da amfani da su, wani muhimmin ɓangare na malalar ionic zai kasance malalar O2- da H-ion da ke fitowa daga ruwa da aka kunna ta hanyar lantarki. Bayan O2-ion ya kai ga anode na ƙarfe na AL, yana haɗuwa da AL don samar da AL2O3, wanda a hankali ke samar da wani Layer na kariya daga AL2O3 akan lokaci don rufewa da kuma ware lahani, don haka yana ƙara juriyar kariya daga capacitor da kuma cimma nasarar warkar da kansa.

A bayyane yake cewa ana buƙatar wani adadin kuzari don kammala warkar da kansa na wani ƙarfe mai ƙarfin fim ɗin halitta. Akwai hanyoyi guda biyu na makamashi, ɗaya daga wutar lantarki ne ɗayan kuma daga iskar oxygen da nitriding exothermic reaction na ƙarfe a cikin ɓangaren lahani, makamashin da ake buƙata don warkar da kansa sau da yawa ana kiransa makamashin warkar da kansa.

 
Warkar da kai shine mafi mahimmancin fasalin capacitors na fim ɗin ƙarfe kuma fa'idodin da yake kawowa suna da yawa. Duk da haka, akwai wasu rashin amfani, kamar raguwar ƙarfin capacitor da ake amfani da shi a hankali. Idan ƙarfin yana aiki tare da yawan warkar da kansa, zai haifar da raguwar ƙarfinsa da juriyar kariya, ƙaruwa mai yawa a kusurwar asara da kuma gazawar capacitor cikin sauri.

Idan kuna da wasu bayanai game da wasu fannoni na halayen warkar da kai na ƙarfin ƙarfe na capacitors, da fatan za ku tattauna da mu.