کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8022243 | 1517282 | 2013 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Extreme effects of Na doping on microstructure, giant dielectric response and dielectric relaxation behavior in CaCu3Ti4O12 ceramics
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Giant dielectric response of CaCu3Ti4O12 ceramics prepared using a solid state reaction method was extremely enhanced by doping with Na ions. Doping CaCu3Ti4O12 with 2.0 at% and sintering at a relatively low temperature of 1030 °C can cause an increase in the mean grain size by a factor of â¼25. The large grained Ca0.98Na0.02Cu3Ti4O12 ceramic exhibits a very high dielectric constant, εâ²â¼105, at room temperature and over the frequency range of 102-105 Hz. Very high εⲠvalues with temperature coefficient less than ±15% were observed in Ca0.98Na0.02Cu3Ti4O12 ceramics in the range of â70-100 °C. The effect of Na doping on the giant dielectric relaxation behavior can be well explained by the Maxwell-Wagner polarization relaxation model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 106, 1 September 2013, Pages 129-132
Journal: Materials Letters - Volume 106, 1 September 2013, Pages 129-132
نویسندگان
Prasit Thongbai, Keerati Meeporn, Teerapon Yamwong, Santi Maensiri,