کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8023970 | 1517541 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of ZrO2 sol concentration on microstructure and electrical properties of ZrO2-Al2O3 dielectrics formed on Al foils
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
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چکیده انگلیسی
The effects of ZrO2 sol concentration on the microstructure and electrical properties of ZrO2-Al2O3 dielectrics on etched Al foils are studied. The experiment is carried out by coating the surface of etched Al foils with ZrO2 sol with a series of concentrations and anodizing in the 2-methyl-1,3-propanediol (MPD)-boric acid electrolyte at 700, 800, and 900â¯V. The increase in the thickness of the ZrO2-coated layer with increasing ZrO2 sol concentration causes a reduction in the total thickness of dielectrics. The tetragonal-to-monoclinic ZrO2 phase change can be induced by anodization and the increase in the crystalline size of tetragonal ZrO2. The Zr-Al-O composite layer after anodization exhibits a microstructure that is a combination of the microstructures of separated high-permittivity crystalline ZrO2 and amorphous high-resistivity Al2O3. The optimal ZrO2 sol concentration is 1.3â¯M, and the specific capacitances increased by 38% for 700â¯V, 40% for 800â¯V, and 66% for 900â¯V compared with those of non-coated samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 342, 25 May 2018, Pages 159-166
Journal: Surface and Coatings Technology - Volume 342, 25 May 2018, Pages 159-166
نویسندگان
Kaiqiang Zhang, Sang-Shik Park,