کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898154 | 1510132 | 2018 | 37 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sintering temperature effect on microstructure, electrical properties and temperature stability of MnO-modified KNN-based ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Lead-free 0.955K0.5Na0.5NbO3-0.045Bi0.5Na0.5ZrO3â¯+â¯0.6%MnO (KNN-0.045BNZâ¯+â¯Mn0.6) ceramics have been prepared by a conventional solid-state sintering method in air. All the samples sintered at different temperatures possess a coexisting phase boundary (CPB) between rhombohedral (R) phase and tetragonal (T) phase. The increase of sintering temperature (Ts) increases the phase fraction of T phase in CPB region. Mn2+, Mn3+ and Mn4+ ions coexist in all the KNN-0.045BNZâ¯+â¯Mn0.6 ceramics sintered at 1110â¯Â°C to 1190â¯Â°C. High sintering temperature can induce a transformation from MnNb'' defects to MnNb' defects. The samples with fine grain show stable octahedral structure. The KNN-0.045BNZâ¯+â¯Mn0.6 ceramics with fine grain possess excellent temperature stability of d33* due to the wide phase transition region. The increase of sintering temperature induces the (R-T) phase transition temperature to move to room temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 9, August 2018, Pages 3136-3146
Journal: Journal of the European Ceramic Society - Volume 38, Issue 9, August 2018, Pages 3136-3146
نویسندگان
Zhenyong Cen, Yichao Zhen, Wei Feng, Peiyao Zhao, Lingling Chen, Xiaohui Wang, Longtu Li,