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Korean Chemical Engineering Research,
Vol.42, No.2, 257-261, 2004
Vol.42, No.2, 257-261, 2004
졸-겔 공정으로 제조한 Al/Nb2O5 캐패시터의 특성 분석
The Characterization of Al/Nb2O5 Capacitors Prepared by Sol-Gel Process
졸-겔 공정을 통하여 기존의 Al2O3 대비 유전율이 높으면서 알루미늄의 융점 이하 온도에서 결정화가 가능한 Nb2O5를 알루미늄 에칭박 위에 코팅하여 Al/Nb2O5 전극을 제조하였다. 니오븀에톡시드, 에탄올, 초산, 디에탄올아민, 증류수의 몰비율이 1 : 80 : 0.5 : 1.5 : 1.5일 때 안정하고 균질한 졸을 얻을 수 있었다. Al/Nb2O5 전극의 물리적 및 전기적 특성을 측정하였으며, 동일한 내전압을 기준으로 전기화학적 양극산화로 제조한 Al/Al2O3 전극과 그 특성을 비교하였다. Al/Nb2O5 전극의 특성은 열처리 온도, 열처리 시간, 코팅횟수에 의존하였다. 16 V 내전압을 기준으로 Al/Nb2O5박이 Al/Al2O3박에 비하여 28.3% 정도 우수한 CV적을 나타냈으나 누설전류는 다소 열등하였다.
Al/Nb2O5 electrode was prepared by sol-gel process using dip-coating method. Nb2O5 being higher dielectric constance than Al2O3 and being able to be crystallized below the melting point of aluminum was coated on aluminum etched foil. A stable and uniform sol solution was obtained with the mole ratio of 1 : 80 : 0.5 : 1.5 : 1.5-niobium ethoxide : ethyl alcohol : acetic acid : diethanol amine : distilled water. The physical and electrical characteristics of the Al/Nb2O5 electrode were evaluated and then were compared with those of Al/Al2O3 electrode anodized electrochemically. The characteristics of Al/Nb2O5 electrode depended on a calcination temperature, a calcination time and the number of coating times. On the basis of 16 V withstanding voltage, Al/Nb2O5 electrode was 28.3% higher C·V product than that of Al/Al2O3 but was inferior leakage current to the Al/Al2O3 electrode.
Keywords:
Al/Nb2O5 Electrode; Sol-Gel Process; Niobium Ethoxide; Al/Al2O3 Electrode; Aluminum Electrolytic Capacitor
[References]
- JCC, Aluminum Electrolytic Condenser, JCC, 1996
- Munshi MZA, Handbook of Solid State Batteries & Capacitors, World Scientific, Singapore, 1995
- Kudoh Y, Nishino A, Electrochemistry, 69(6), 397, 2001
- GTP, The Latest Condenser Technology and Material-86, GTP, Tokyo, 1985
- Kim J, Cho S, Min H, Choi J, Hwang K, J. Korean Ind. Eng. Chem., 11(5), 535, 2000
- Watanabe K, Hirai S, Electrochemistry, 69(6), 407, 2001
- Lai GC, Preparation of Thin Film Having High Capacitance and its Electric Characteristics, Tokyo Aluminium, 1997
- Lai GC, J. Ceram. Soc. Jpn., 107(12), 1221, 1999
- Shikanai M, Sakairi M, Takahashi H, Seo M, Takahiro K, Nagata S, Yamaguchi S, J. Electrochem. Soc., 144(8), 2756, 1997
- Davis GD, Moshier WC, Fritz TL, Cote GO, J. Electrochem. Soc., 137(2), 422, 1990
- Kukli K, Ritala M, Leskela M, J. Electrochem. Soc., 148(2), F35, 2001
- Brinker CJ, Sol-Gel Science, Academic Press, Inc., 1990
- Pierre AC, Introduction to Sol-Gel Processing, Kluwer Academic Publishers, 1998
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