کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1490875 992335 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and DC electrical conductivity of spinel nickel ferrite sintered in air and nitrogen atmospheres
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Microstructure and DC electrical conductivity of spinel nickel ferrite sintered in air and nitrogen atmospheres
چکیده انگلیسی

In recent years, the development of inert anode materials has gained considerable attention because such materials are capable of producing only environment-friendly O2 and saving energy during aluminum electrolysis. Nickel ferrite was prepared by a solid-state reaction as the inert anode in this study and its microstructures and direct current conductivities were analyzed in detail regarding the effects of different sintering atmospheres. A single-phase spinel structure was confirmed for all samples by X-ray powder diffraction. The grain sizes and the relative densities of the samples sintered in nitrogen increased by over 7 μm and 10.8%, respectively, compared to those sintered in air. The direct current conductivities of the samples sintered in nitrogen showed a drastic increase compared to those sintered in air, believed to be due to the effects of increased Fe2+ ion concentration at octahedral sites and the increase of the relative density.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 45, Issue 11, November 2010, Pages 1668–1671
نویسندگان
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