کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1478972 991241 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of lead iron tantalate thick films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Preparation and characterization of lead iron tantalate thick films
چکیده انگلیسی

Thick film compositions based on solid solutions of relaxor ferroelectric Pb(Fe1/2Ta1/2)O3 and normal ferroelectric PbTiO3 were prepared and applied for class II capacitors. The dielectric layers were fired at 870 °C. In order to shift the temperature of ferroelectric–paraelectric transition upwards the addition of 10, 15 and 20 mol% of PbTiO3 was used. Introduction of 0.1–0.5 mol% of MnO2 or Co3O4 to the pastes resulted in an increase in their resistivity. The electric permittivity and dissipation factor of the layers were determined in the temperature range from −55 to 180 °C and in the frequency range 10 Hz–1 MHz. Resistivities of the thick films were measured in the temperature range 20–500 °C. Microstructure of the layers was characterized by a scanning electron microscope. The advantageous features of the developed thick films were: lack of any nonferroelectric fluxes, dense microstructure, relatively high dielectric permittivity (300–1900), high resistivity (about 1012 Ωcm), low temperature coefficient of capacitance and low electrical field dependence of capacitance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 25, Issue 12, 2005, Pages 2133–2136
نویسندگان
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