Synthesis of nanocrystalline Ni1Co0.2Mn1.8O4 powders for NTC thermistor by a gel auto-combustion process

Weimin Wang; Xiangchun Liu; Feng Gao; Changsheng Tian

doi:10.1016/j.ceramint.2005.10.010

Synthesis of nanocrystalline Ni₁Co_0.2Mn_1.8O₄ powders for NTC thermistor by a gel auto-combustion process

Weimin Wang, Xiangchun Liu, Feng Gao, Changsheng Tian

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

38 Scopus citations

Abstract

Nanocrystalline Ni₁Co_0.2Mn_1.8O₄ powders were synthesized via a gel auto-combustion process of nitrate-citrate gels. The investigation on the gels by XRD shows that a stable sol-gel can be formed by adding ethylene glycol (EG) and adjusting the pH values. The dried gels exhibit auto-catalytic combustion behavior. The reaction mechanism has been given by detailed studies based on DTA-DSC and XRD techniques. After being sintered at about 1150 °C, well-densified NTC ceramics with B values higher than 3600 k were obtained. It is demonstrated that the synthesized powder is high sinter active, and can be used for NTC thermistor application.

Original language	English
Pages (from-to)	459-462
Number of pages	4
Journal	Ceramics International
Volume	33
Issue number	3
DOIs	https://doi.org/10.1016/j.ceramint.2005.10.010
State	Published - Apr 2007

Keywords

A. Sol-gel process
B. Nanocomposition
NTC thermistors

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10.1016/j.ceramint.2005.10.010

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title = "Synthesis of nanocrystalline Ni1Co0.2Mn1.8O4 powders for NTC thermistor by a gel auto-combustion process",

abstract = "Nanocrystalline Ni1Co0.2Mn1.8O4 powders were synthesized via a gel auto-combustion process of nitrate-citrate gels. The investigation on the gels by XRD shows that a stable sol-gel can be formed by adding ethylene glycol (EG) and adjusting the pH values. The dried gels exhibit auto-catalytic combustion behavior. The reaction mechanism has been given by detailed studies based on DTA-DSC and XRD techniques. After being sintered at about 1150 °C, well-densified NTC ceramics with B values higher than 3600 k were obtained. It is demonstrated that the synthesized powder is high sinter active, and can be used for NTC thermistor application.",

keywords = "A. Sol-gel process, B. Nanocomposition, NTC thermistors",

author = "Weimin Wang and Xiangchun Liu and Feng Gao and Changsheng Tian",

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T1 - Synthesis of nanocrystalline Ni1Co0.2Mn1.8O4 powders for NTC thermistor by a gel auto-combustion process

AU - Wang, Weimin

AU - Liu, Xiangchun

AU - Gao, Feng

AU - Tian, Changsheng

PY - 2007/4

Y1 - 2007/4

N2 - Nanocrystalline Ni1Co0.2Mn1.8O4 powders were synthesized via a gel auto-combustion process of nitrate-citrate gels. The investigation on the gels by XRD shows that a stable sol-gel can be formed by adding ethylene glycol (EG) and adjusting the pH values. The dried gels exhibit auto-catalytic combustion behavior. The reaction mechanism has been given by detailed studies based on DTA-DSC and XRD techniques. After being sintered at about 1150 °C, well-densified NTC ceramics with B values higher than 3600 k were obtained. It is demonstrated that the synthesized powder is high sinter active, and can be used for NTC thermistor application.

AB - Nanocrystalline Ni1Co0.2Mn1.8O4 powders were synthesized via a gel auto-combustion process of nitrate-citrate gels. The investigation on the gels by XRD shows that a stable sol-gel can be formed by adding ethylene glycol (EG) and adjusting the pH values. The dried gels exhibit auto-catalytic combustion behavior. The reaction mechanism has been given by detailed studies based on DTA-DSC and XRD techniques. After being sintered at about 1150 °C, well-densified NTC ceramics with B values higher than 3600 k were obtained. It is demonstrated that the synthesized powder is high sinter active, and can be used for NTC thermistor application.

KW - A. Sol-gel process

KW - B. Nanocomposition

KW - NTC thermistors

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U2 - 10.1016/j.ceramint.2005.10.010

DO - 10.1016/j.ceramint.2005.10.010

M3 - 文章

AN - SCOPUS:33846195490

SN - 0272-8842

VL - 33

SP - 459

EP - 462

JO - Ceramics International

JF - Ceramics International

IS - 3

ER -

Synthesis of nanocrystalline Ni₁Co_0.2Mn_1.8O₄ powders for NTC thermistor by a gel auto-combustion process

Abstract

Keywords

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