TY - JOUR
T1 - Effects of 2-methyl-1, 3-propanediol in boric acid solution on the anodizing behavior and electrical properties of ZrO2-coated Al foil
AU - Zhang, Kaiqiang
AU - Park, Sang Shik
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/1/25
Y1 - 2017/1/25
N2 - Zr-Al2O3 composite oxide films are promising dielectric materials for future use in aluminum (Al) electrolytic capacitors. The films were prepared on etched Al foil samples by ZrO2 sol-gel coating and anodizing. To inhibit O2 evolution during anodization, 2-methyl-1, 3-propanediol (MPD) was used with boric acid solution as an electrolyte. In this study, we investigated the effects of the ratio of MPD in boric acid solution on the anodizing behaviors and electrical properties of ZrO2-coated Al foil. The thickness of the Al2O3 layer decreased as the MPD ratio increased. The MPD-boric acid solution effectively inhibited O2 evolution. The samples anodized in MPD-boric acid electrolyte with a ratio of 3:10 (volume %) exhibited the highest specific capacitance. Relative to those of samples anodized in boric acid solution, the specific capacitances of samples analyzed in the MPD-boric acid electrolyte increased by 45.5% at 700 V, 40.0% at 800 V, and 66.7% at 900 V.
AB - Zr-Al2O3 composite oxide films are promising dielectric materials for future use in aluminum (Al) electrolytic capacitors. The films were prepared on etched Al foil samples by ZrO2 sol-gel coating and anodizing. To inhibit O2 evolution during anodization, 2-methyl-1, 3-propanediol (MPD) was used with boric acid solution as an electrolyte. In this study, we investigated the effects of the ratio of MPD in boric acid solution on the anodizing behaviors and electrical properties of ZrO2-coated Al foil. The thickness of the Al2O3 layer decreased as the MPD ratio increased. The MPD-boric acid solution effectively inhibited O2 evolution. The samples anodized in MPD-boric acid electrolyte with a ratio of 3:10 (volume %) exhibited the highest specific capacitance. Relative to those of samples anodized in boric acid solution, the specific capacitances of samples analyzed in the MPD-boric acid electrolyte increased by 45.5% at 700 V, 40.0% at 800 V, and 66.7% at 900 V.
KW - AlO layer
KW - O evolution
KW - Specific capacitance
KW - Withstanding voltage
KW - Zr-AlO composite layer
UR - http://www.scopus.com/inward/record.url?scp=85007268720&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2016.12.081
DO - 10.1016/j.surfcoat.2016.12.081
M3 - Article
AN - SCOPUS:85007268720
SN - 0257-8972
VL - 310
SP - 143
EP - 147
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -