کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1478608 | 991226 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
X-ray diffraction and infrared spectra studies of FexMn2.34−xNi0.66O4 (0 < x < 1) NTC ceramics
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Series of FexMn2.34−xNi0.66O4 (0 < x < 1) NTC ceramics were prepared by the Pechini method. Resistivity, thermal constant (B) and aging values were measured. It was found that the resistivity increased with increasing iron content x. The B value however first decreased with increasing x in the range of x < 0.6 and then increased with further increase in x. Aging reached a maximum in the middle range (x = 0.4–0.6) of iron content. X-ray diffraction (XRD) and infrared analysis were used to determine the distribution of Fe3+ ions. The Fe3+ ions were found to occupy both A- and B-site when x < 0.6 and then go to B-site when x > 0.6. An redistribution of the Fe3+ ions between A- and B-site was related to the aging of the NTC thermistor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 26, Issue 13, 2006, Pages 2833–2837
Journal: Journal of the European Ceramic Society - Volume 26, Issue 13, 2006, Pages 2833–2837
نویسندگان
Zhongbing Wang, Chunhua Zhao, Pinghua Yang, A.J.A. Winnubst, Chusheng Chen,