کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1624113 1516410 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of Zn on the microstructure and electrical properties of Mn1.17−xNi0.93Co0.9ZnxO4 (0 ≤ x ≤ 0.075) NTC thermistors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
The effect of Zn on the microstructure and electrical properties of Mn1.17−xNi0.93Co0.9ZnxO4 (0 ≤ x ≤ 0.075) NTC thermistors
چکیده انگلیسی

As-sintered Mn1.17−xNi0.93Co0.9ZnxO4 (0 ≤ x ≤ 0.075) bodies consisted of two phases: a major Mn-rich phase with a cubic spinel structure and a minor NiO phase with a cubic structure. The Mn1.17−xNi0.93Co0.9ZnxO4 ceramics were highly dense, ranging from 96 to 98% of the theoretical density and were microscopically homogeneous. The addition of Zn did not cause much change in the grain size and porosity. The obtained ρ25, B25/85 constant, and activation energy of the negative temperature coefficient (NTC) Mn1.17−xNi0.93Co0.9ZnxO4 thermistors were in the range 1145–3696 Ω cm, 3218–3550 K, and 0.277–0.306 eV, respectively. This means that the electrical properties can be adjusted to desired values, depending on their Zn content. In particular, the resistivity and sensitivity were substantially enhanced with increasing Zn content.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 467, Issues 1–2, 7 January 2009, Pages 310–316
نویسندگان
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