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Preparation and properties of spinel-type Zn-Co-Mn oxide negative temperature coefficient ceramic thermistors
- Authors
- Kim, Kyeong-Min; Lee, Sung-Gap; Lee, Dong-Jin; Park, Mi-Ri
- Issue Date
- Apr-2017
- Publisher
- KOREAN ASSOC CRYSTAL GROWTH, INC
- Keywords
- Temperature sensors; Zn-Co-Mn oxide; Structural properties; Electrical properties
- Citation
- JOURNAL OF CERAMIC PROCESSING RESEARCH, v.18, no.4, pp 320 - 323
- Pages
- 4
- Indexed
- SCI
SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF CERAMIC PROCESSING RESEARCH
- Volume
- 18
- Number
- 4
- Start Page
- 320
- End Page
- 323
- ISSN
- 1229-9162
2672-152X
- Abstract
- The effects of the addition of Co ions on the structural and electrical properties of Zn1.10CoxMn1.90-xO4 NTC thermistor composition has been studied. All specimens exhibited a very dense microstructure without any porosities, and the average grain size decreased from 5.21 mu m to 4.86 mu m with an increase in Co content x from 0 to 0.25. All specimens exhibited the sintered density characteristic of at least approximately 96% of the theoretical values and displayed a good NTCR characteristic of less than -4.7%/degrees C. The electrical resistance at room temperature of the Zn1.10Co0.25Mn1.65O4 specimen is 7.2 k Omega. The Zn1.10Co0.15Mn1.75O4 specimen exhibited a minimum activation energy of 0.373 eV.
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