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Effect of Mg substitution on microstructure and electrical properties of Mn Ni Co Mg O (0 ≤ x ≤ 1) NTC ceramics

Journal of Materials Science: Materials in Electronics, ISSN: 0957-4522, Vol: 23, Issue: 4, Page: 851-857
2012
  • 24
    Citations
  • 0
    Usage
  • 9
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    24
    • Citation Indexes
      24
  • Captures
    9

Article Description

The NTC thermistors based on spinel-type semiconducting electroceramics with compositions Mn Ni Co Mg O (0 ≤ x ≤ 1) were synthesized by solid-state method. The influences of Mg content on the Mn Ni Co Mg O materials were investigated by laser particle size analyzer, XRD, SEM, EDS and electrical measurements, respectively. The experiment results show that the substituted Mg suppresses the separation of NiO phase. Both the grain size and density decrease as the amount of Mg content in Mn Ni Co Mg O samples increases. In particular, the substituted Mg leads to a decrease in the resistance drift of the Mn Ni Co Mg O NTC ceramics after aging test. This indicates that the Mg substituted Mn Ni Co Mg O NTC ceramics display high electrical stability in comparison with the Mg-free Mn Ni Co1.0O ceramics. © Springer Science+Business Media, LLC 2011.

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