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Preparation and electrical properties of nickel manganite Ni0.79Mn2.21O4 ceramics for NTC thermistors
- Issue Date
- May-2017
- Publisher
- KOREAN ASSOC CRYSTAL GROWTH, INC
- Keywords
- Ni-Mn oxide; Sintering temperature; Structural properties; Electrical properties
- Citation
- JOURNAL OF CERAMIC PROCESSING RESEARCH, v.18, no.5, pp 357 - 360
- Pages
- 4
- Indexed
- SCI
SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF CERAMIC PROCESSING RESEARCH
- Volume
- 18
- Number
- 5
- Start Page
- 357
- End Page
- 360
- ISSN
- 1229-9162
2672-152X
- Abstract
- Ni0.79Mn2.21O4 ceramics were prepared using the mixed-oxide method. All specimens displayed the typical XRD patterns of a single-phase cubic polycrystalline structure. The average grain size of the specimen sintered at 1200 degrees C was approximately 6.65 mu m. All specimens exhibited the typical NTC thermistor characteristic where the electrical resistance exponentially decreases with an increase in temperature. The conduction process can be explained well by the nearest neighbor hopping (NNH) mechanism. The NTC property, activation energy, B-25/50 constant and resistivity at room temperature of the Ni0.79Mn2.21O4 specimen sintered at 1150 degrees C were -4.2%/degrees C, 4024 K, 0.329 eV and 3360 Omega.cm, respectively. These values are good enough to be applied to NTC thermistor devices.
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Collections - 공학계열 > Dept.of Materials Engineering and Convergence Technology > Journal Articles
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