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Nano porous alumina template with funnel pores structure | ||
| Journal of Interfaces, Thin Films, and Low dimensional systems | ||
| دوره 6، شماره 2، فروردین 2023، صفحه 631-636 اصل مقاله (841.34 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22051/jitl.2023.44113.1090 | ||
| نویسندگان | ||
| Sedigheh Dadras* ؛ Hadiye Cheraghpour؛ Fatemeh Mashhadi | ||
| Alzahra University | ||
| چکیده | ||
| In this research, we fabricated a porous alumina template with nano meter funnel pores, that using two anodizing steps with different voltages by the electrochemical method. FE-SEM analysis was used to determine the pores morphology of the templates, that shows the funnel pores which are formed as a result of voltage reduction in the second anodization. In this process, by creating funnel pores, we were able to increase the porosity and the specific surface area of the porous alumina template, which can increase the electrical capacitance of the template as a capacitor dielectric from 6 pF to 50 pF at a frequency of 50 kHz. Use of this template as a capacitor dielectric would be a more effective method to improve the capacitance of capacitors. Also, by measuring the electrical capacity and loss of the samples, the conductivity at different frequencies were calculated. | ||
| کلیدواژه‌ها | ||
| AAO template؛ Nano porosity؛ Electrical capacitance؛ Anodization؛ Electrochemical method | ||
| عنوان مقاله [English] | ||
| قالب آلومینای نانو متخلخل با حفره های قیفی شکل | ||
| نویسندگان [English] | ||
| صدیقه دادرس؛ هدیه چراغپور؛ فاطمه مشهدی | ||
| دانشگاه الزهرا | ||
| چکیده [English] | ||
| در این پژوهش قالب آلومینای متخلخل با حفره های نانومتری قیفی شکل با استفاده از آندایزاسیون دو مرحله ای با ولتاژ های مختلف به روش الکتروشیمیایی ساخته شد. با آنالیز FE-SEM مورفولوژی حفره های قالب تعیین شد که تشکیل حفره های قیفی شکل بر اثر کاهش ولتاژ در آندایزاسیون دوم را نشان می داد. در این فرآیند با ایجاد حفره های قیفی شکل، توانستیم تخلخل و سطح ویژه قالب آلومینای متخلخل را افزایش دهیم که می تواند ظرفیت الکتریکی قالب را به عنوان دی الکتریک خازن از 6 pF به 50 pF در فرکانس 50 kH افزایش دهد. استفاده از این قالب به عنوان دی الکتریک خازن روش موثری برای بهبود ظرفیت خازن ها خواهد بود. همچنین با اندازه گیری ظرفیت الکتریکی و اتلاف نمونه، رسانندگی در فرکانس های مختلف محاسبه شد. | ||
| کلیدواژه‌ها [English] | ||
| قالب AAO, نانو متخلخل, ظرفیت الکتریکی, آندیزاسیون, روش الکتروشیمیایی | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 139 تعداد دریافت فایل اصل مقاله: 140 |
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