کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9808636 | 1517353 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Non-stoichiometric NiZn ferrite by sol-gel processing
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Non-stoichiometric NiZn ferrite by sol-gel processing Non-stoichiometric NiZn ferrite by sol-gel processing](/preview/png/9808636.png)
چکیده انگلیسی
Non-stoichiometric Ni0.5Zn0.5Fe2âxO4â3/2x ferrites over a wide range of x = 0â¼0.8 are synthesized by a sol-gel processing. Phase evolution, crystal structure and crystallite size of spinel ferrites are dependent on annealing temperature and the amount of Fe deficiency. The crystallite size of spinel increases with annealing temperature and grows faster in stoichiometric ferrites than that of non-stoichiometric. Fe deficiency results in the partial reduction of spinel ferrite to zincite ZnO. XRD indicates that the crystallization temperature of ZnO is increased to about 700 °C. Zincite reduces the number of ferrite crystallites and disfavors the growth of spinel ferrites. The lattice parameters decrease with Fe deficiency and are insensitive to the variation in composition in the samples annealed at lower temperature due to the segregation of ZnO and lattice expansion in the ultrafine crystallites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 59, Issues 14â15, June 2005, Pages 1941-1944
Journal: Materials Letters - Volume 59, Issues 14â15, June 2005, Pages 1941-1944
نویسندگان
Xinhua He, Guosheng Song, Jianhong Zhu,