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Fabrication and Electrical Properties of Mn–Ni–Co–Cu–Si Oxides Negative Temperature Coefficient Thermistors
Author(s) -
Park K.
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.00170.x
Subject(s) - thermistor , temperature coefficient , electrical resistivity and conductivity , spinel , materials science , analytical chemistry (journal) , microstructure , ceramic , metallurgy , mineralogy , chemistry , composite material , electrical engineering , chromatography , engineering
The microstructure and electrical properties of Mn–Ni–Co–Cu–Si oxides negative temperature coefficient (NTC) thermistors were studied. The as‐sintered (Mn 1.62 Ni 0.72 Co 0.57− x Cu x Si 0.09 )O 4 (0≤ x ≤0.12) and (Mn 1.2 Ni 0.78 Co 0.87− x Cu 0.15 Si x )O 4 (0≤ x ≤ 0.15) ceramics showed the solid solutions of Mn–Ni–Co–Cu–Si oxides with a cubic spinel structure. The addition of SiO 2 led to an increase in the temperature coefficient of resistivity. This demonstrates that the SiO 2 addition is desirable for developing highly sensitive NTC thermistors. In addition, the resistivity and the temperature coefficient of resistivity for (Mn 1.62 Ni 0.72 Co 0.57− x Cu x Si 0.09 )O 4 and (Mn 1.2 Ni 0.78 Co 0.87− x Cu 0.15 Si x )O 4 NTC thermistors were controlled by changing the composition.