کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5460651 | 1516197 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrical properties and thermal stability of Ce-modified Ca0.80(Li0.5Bi0.5)0.20Bi2Nb2O9 ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electrical properties and thermal stability of Ce-modified Ca0.80(Li0.5Bi0.5)0.20Bi2Nb2O9 ceramics Electrical properties and thermal stability of Ce-modified Ca0.80(Li0.5Bi0.5)0.20Bi2Nb2O9 ceramics](/preview/png/5460651.png)
چکیده انگلیسی
Ce-modified Ca0.80(Li0.5Bi0.5)0.20Bi2Nb2O9 ceramics (Ca0.80(Li0.5CexBi0.5-x)0.20Bi2Nb2O9) were synthesized by conventional solid state sintering method. The effects of Ce additives on the electrical properties were studied. With the increase of Ce content, the piezoelectricity of the ceramics was significantly enhanced, and the Curie temperature (TC) decreased from 941 °C to 917 °C, leading to the relatively poor thermal stability in the ceramics. The Ca0.80(Li0.5Ce0.15Bi0.35)0.20Bi2Nb2O9 (CBNLB-C15) ceramics possessed the optimum properties, and the d33 value was found to be â¼17.2 pC/N, together with a high TC (â¼928 °C). In addition, a good performance of thermal stability that remained 89.5% of its d33 (â¼15.4 pC/N) was obtained when annealing temperature was 900 °C. The detailed electrical properties of samples in high temperature region were determined by using electrochemical impedance spectra. The results revealed that the degradation of resistance may be attributed to the substitution of Nb5+ ions by Ce4+ ions, and oxygen vacancies make a major contribution to electrical conduction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 697, 15 March 2017, Pages 380-387
Journal: Journal of Alloys and Compounds - Volume 697, 15 March 2017, Pages 380-387
نویسندگان
Gang Liu, Jing Yuan, Rui Nie, Laiming Jiang, Zhi Tan, Jianguo Zhu, Qiang Chen,