کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1296814 1498360 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxygen vacancy-induced aging of Mn-doped Ba0.8Sr0.2TiO3 ceramics in paraelectric and ferroelectric state
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Oxygen vacancy-induced aging of Mn-doped Ba0.8Sr0.2TiO3 ceramics in paraelectric and ferroelectric state
چکیده انگلیسی

The aging properties of 0.01 mol% Mn-doped Ba0.8Sr0.2TiO3 ceramics have been investigated from 30 °C to 400 °C at various frequencies. Decreases in ε′(T) of the aged sample compared to the fresh one around the tetragonal–cubic transition and in the regime of diffusion have been observed. The activation energy Ea = 1.25 eV obtained from the J–T loop at zero electric field indicates that oxygen vacancies dominate in the aging. The symmetry-conforming principle of point defects was employed to explain the time and temperature dependence of aging in the dielectric constant and double/constricted P–E loops of the samples aged in the paraelectric and ferroelectric state.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 180, Issues 20–22, 17 August 2009, Pages 1139–1142
نویسندگان
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