کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1492261 | 992374 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of ultra-fine cobalt–nickel manganite powders and ceramics derived from mixed oxalate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Co0.30Ni0.66Mn2.04O4 negative temperature coefficient ceramics were derived from mixed oxalate Co0.30Ni0.66Mn2.04(C2O4)3·nH2O. The mixed oxalate was synthesized by milling a mixture of cobalt acetate, nickel acetate, manganese acetate, and oxalic acid at room temperature. An ultra-fine Co0.30Ni0.66Mn2.04O4 powder was obtained by calcining the mixed oxalate in air at 800 °C for 3 h. The oxide powder compact was sintered at a relatively low temperature of 1100 °C for 5 h, achieving a relative density of ∼98%. The specific resistivity ρ25 °C and the thermal constant B25/85 °C were 765.2 Ω cm and 3604 K, respectively. The resistance drift after aging at 150 °C for 500 h was 1.5%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 43, Issue 7, 1 July 2008, Pages 1877–1882
Journal: Materials Research Bulletin - Volume 43, Issue 7, 1 July 2008, Pages 1877–1882
نویسندگان
Cui-Hong Zheng, Dao-Lai Fang,