کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1462705 989636 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric properties of CaCu3Ti4O12 improved by chromium/lanthanum co-doping
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Dielectric properties of CaCu3Ti4O12 improved by chromium/lanthanum co-doping
چکیده انگلیسی

The dielectric properties of Cr + La co-doped CaCu3Ti4O12 ceramics prepared by a solid-state reaction method were evaluated and compared to Cr-doped, La-doped, and parent CaCu3Ti4O12 (CCTO). Their structure and grain size were evaluated by X-ray diffraction and scanning electron microscopy, respectively. No secondary phase was detected based on the XRD analysis. The results show that, the room temperature dielectric loss of the co-doped samples is reduced to 43% compared to CCTO and their dielectric permittivity is higher than the un-doped, Cr-doped, and La-doped samples at frequencies over 325 kHz, 30 kHz, and 12 Hz, respectively. Furthermore, the temperature stability of the co-doped sample is significantly more convenient than that of CCTO, and its dielectric loss is three times lower. The results also indicated that the co-doping method is effective in reducing the dielectric loss, still maintaining the high dielectric permittivity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 38, Issue 5, July 2012, Pages 4217–4220
نویسندگان
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