کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5437261 | 1509798 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Orientation related electrocaloric effect and dielectric phase transitions of relaxor PMN-PT single crystals
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Orientation related electrocaloric effect and dielectric phase transitions of relaxor PMN-PT single crystals Orientation related electrocaloric effect and dielectric phase transitions of relaxor PMN-PT single crystals](/preview/png/5437261.png)
چکیده انگلیسی
Orientation related phase transitions of 0.76Pb(Mg1/3Nb2/3)O3-0.24PbTiO3 single crystals are studied. Values of the relaxation parameters (γ = 1.87-1.97) estimated from linear fits of the modified Curie-Weiss law indicate the relaxor nature. For (110) oriented single crystal, typical oxygen vacancies related high temperature dielectric relaxation behaviors are observed and analyzed. Orientations dependent electrocaloric effects of 0.76Pb(Mg1/3Nb2/3)O3-0.24PbTiO3 single crystals are first studied and reported, large reversible adiabatic temperature change (0.80 K) and isothermal entropy change (0.66 J Kâ1 kgâ1) are observed. Giant refrigeration efficiency (43.52) and high electrocaloric coefficient (0.041 K cm kVâ1) exceed the electrocaloric effect values in most bulk ferroelectrics in previous reports.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 18, 15 December 2017, Pages 16300-16305
Journal: Ceramics International - Volume 43, Issue 18, 15 December 2017, Pages 16300-16305
نویسندگان
Tian-Fu Zhang, Xin-Gui Tang, Peng-Zu Ge, Qiu-Xiang Liu, Yan-Ping Jiang,