Effect of Fe addition on microstructure and electrical properties of Co 1.5 Mn 1.5−x Fe x O 4 (0.2 ≤ x ≤ 1.0) NTC thermistors
作者： Xu Liu , Junhua Wang , Zhenhua Hu , Jincheng Yao , Aimin Chang
DOI: 10.1007/S10854-017-6405-9
关键词: Aging test 、 Fe content 、 Microstructure 、 Thermistor 、 Crystal structure 、 Materials science 、 Metallurgy 、 Ceramic 、 Analytical chemistry 、 Relative resistance 、 Spinel
摘要: In this work, the effect of Fe addition on microstructure and electrical properties Co1.5Mn1.5−xFexO4 (0.2 ≤ x ≤ 1.0) NTC thermistors was studied. The added did not affect crystalline structure formed a single cubic spinel phases. density samples decreased significantly with increasing content. values ρ25, ρ50, B25/50, Ea ceramic were in range 2283–14273 Ω cm, 730–5157 Ω cm, 3701–3991 K, 0.3196–0.3445 eV, respectively. This means that can be adjusted to desired values, depending relative resistance drift ΔR/R0 had minimum value when x = 0.4, after aging test for 500 h.
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