کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1476696 1510147 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Processing and dielectric characterization of Ba0.3Sr0.7TiO3 thin films on alumina substrates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Processing and dielectric characterization of Ba0.3Sr0.7TiO3 thin films on alumina substrates
چکیده انگلیسی

Ba0.3Sr0.7TiO3 (BST) thin films were prepared from the sols based on alkaline earth acetates and titanium propoxide in 2-methoxyethanol–acetic acid solvents and deposited on polished alumina substrates by spin coating. The perovskite phase crystallizes upon heating at/above 700 °C. By increasing the annealing temperature from 700 to 900 °C the grain size increases from 40 to 80 nm, due to the increased driving force for crystallization. The annealing time has got only a minor influence on grain size as a consequence of constrained conditions of the film. The dielectric permittivity and tunability (ɛ0 V/ɛ200 V) of BST films, measured at 1 MHz, strongly depend on the grain size, exhibiting the values of 345 and 1.47, and 722 and 1.93 for the films with 40 and 80 nm-sized grains, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 27, Issues 8–9, 2007, Pages 2945–2948
نویسندگان
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