입방정 집합조직을 가진 고순도 알루미늄의 염산용액 중 전해에칭 연구

Abstract

입방정 (100)<001> 집합조직을 가진 고순도 알루미늄 포일을 묽은 염산에 에칭함으로서 직경 1~2㎛ 인 관통형 터널피트를 단위면적당 약 10^{7}개 이상 형성하여 알루미늄 전해캐퍼씨터의 정전용량을 극대화시키는 연구를 수행하였다.

고순도 알루미늄 포일을 이용하여 전류밀도 및 통전량의 변화에 따라 포일에 형성된 에치피트의 관찰과 정전용량의 변화를 측정하여 내전압 265V_{f}에서는 전류밀도가 150mA/cm²에서 최대의 정전용량값(1.70μF/cm²)을 얻었으며, 내전압 540V_{f}에서는 전류밀도가 200mA/cm²에서 정전용량이 최대값(0.60μF/cm²)이었고, 내전압 600V_{f}에서는 전류밀도가 200mA/cm²에서 최대의 정전용량의 값(0.58μF/cm²)을 얻었다. 또한, 내전압 265V_{f}에서는 통전량 60 Coulomb/cm², 540V_{f}및 600V_{f}에서 68 Coulomb/cm²이 최적 전해에칭 조건이었다.

A Study on capacitance gain of high voltage aluminium electrolytic capacitor has been conducted by etching cubic textured aluminium foil in hydrochloric acid. Capacitance obtained by etching and anodizing of aluminium of was decreased with the increase of anodizing voltage. Maximum capacitance obtained by anodizing at 260V was 1.70μF/cm², however, maximum capacitance obtained by anodizing at 600V was 0.58μF/cm².

Optimum electrochemical etching conditions for obtaining maximum capacitance was varied according to anodizing voltage of etched aluminium foil.

A Study on capacitance gain of high voltage aluminium electrolytic capacitor has been conducted by etching cubic textured aluminium foil in hydrochloric acid. Capacitance obtained by etching and anodizing of aluminium of was decreased with the increase of anodizing voltage. Maximum capacitance obtained by anodizing at 260V was 1.70μF/cm², however, maximum capacitance obtained by anodizing at 600V was 0.58μF/cm².

Optimum electrochemical etching conditions for obtaining maximum capacitance was varied according to anodizing voltage of etched aluminium foil.