Improvement in the electrical stability of Mn-Ni-Co-O NTC thermistors by substituting Cr2O3 for Co3O4

K. Park; J. K. Lee; J. G. Kim; S. Nahm

doi:10.1016/j.jallcom.2006.07.070

Improvement in the electrical stability of Mn-Ni-Co-O NTC thermistors by substituting Cr₂O₃ for Co₃O₄

K. Park, J. K. Lee, J. G. Kim, S. Nahm

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

The as-sintered Mn_1.1Ni_1.4Co_0.5-xCr_xO₄ (0 ≤ x ≤ 0.35) samples were crystallized in a cubic spinel Mn- and Ni-rich oxides. The substituted Cr led to a significant decrease in the resistivity change of the Mn_1.1Ni_1.4Co_0.5-xCr_xO₄ negative temperature coefficient (NTC) thermistors after the thermal constraint. This indicates that the Cr-substituted Mn_1.1Ni_1.4Co_0.5-xCr_xO₄ NTC thermistors have good electrical stability in comparison to the Cr-free Mn_1.1Ni_1.4Co_0.5O₄ thermistors. We strongly propose that the Cr substitution is highly desirable for the fabrication of stable high-performance NTC thermistors.

Original language	English
Pages (from-to)	211-214
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	437
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2006.07.070
Publication status	Published - 2007 Jun 28

Keywords

CrO
Electrical resistivity
Electrical stability
Microstructure
Mn-Ni-Co-O
NTC thermistors

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2006.07.070

Cite this

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title = "Improvement in the electrical stability of Mn-Ni-Co-O NTC thermistors by substituting Cr2O3 for Co3O4",

abstract = "The as-sintered Mn1.1Ni1.4Co0.5-xCrxO4 (0 ≤ x ≤ 0.35) samples were crystallized in a cubic spinel Mn- and Ni-rich oxides. The substituted Cr led to a significant decrease in the resistivity change of the Mn1.1Ni1.4Co0.5-xCrxO4 negative temperature coefficient (NTC) thermistors after the thermal constraint. This indicates that the Cr-substituted Mn1.1Ni1.4Co0.5-xCrxO4 NTC thermistors have good electrical stability in comparison to the Cr-free Mn1.1Ni1.4Co0.5O4 thermistors. We strongly propose that the Cr substitution is highly desirable for the fabrication of stable high-performance NTC thermistors.",

keywords = "CrO, Electrical resistivity, Electrical stability, Microstructure, Mn-Ni-Co-O, NTC thermistors",

author = "K. Park and Lee, {J. K.} and Kim, {J. G.} and S. Nahm",

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T1 - Improvement in the electrical stability of Mn-Ni-Co-O NTC thermistors by substituting Cr2O3 for Co3O4

AU - Park, K.

AU - Lee, J. K.

AU - Kim, J. G.

AU - Nahm, S.

PY - 2007/6/28

Y1 - 2007/6/28

N2 - The as-sintered Mn1.1Ni1.4Co0.5-xCrxO4 (0 ≤ x ≤ 0.35) samples were crystallized in a cubic spinel Mn- and Ni-rich oxides. The substituted Cr led to a significant decrease in the resistivity change of the Mn1.1Ni1.4Co0.5-xCrxO4 negative temperature coefficient (NTC) thermistors after the thermal constraint. This indicates that the Cr-substituted Mn1.1Ni1.4Co0.5-xCrxO4 NTC thermistors have good electrical stability in comparison to the Cr-free Mn1.1Ni1.4Co0.5O4 thermistors. We strongly propose that the Cr substitution is highly desirable for the fabrication of stable high-performance NTC thermistors.

AB - The as-sintered Mn1.1Ni1.4Co0.5-xCrxO4 (0 ≤ x ≤ 0.35) samples were crystallized in a cubic spinel Mn- and Ni-rich oxides. The substituted Cr led to a significant decrease in the resistivity change of the Mn1.1Ni1.4Co0.5-xCrxO4 negative temperature coefficient (NTC) thermistors after the thermal constraint. This indicates that the Cr-substituted Mn1.1Ni1.4Co0.5-xCrxO4 NTC thermistors have good electrical stability in comparison to the Cr-free Mn1.1Ni1.4Co0.5O4 thermistors. We strongly propose that the Cr substitution is highly desirable for the fabrication of stable high-performance NTC thermistors.

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KW - Electrical resistivity

KW - Electrical stability

KW - Microstructure

KW - Mn-Ni-Co-O

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