Negative Temperature Coefficient Material with Low Thermal Constant and High Resistivity for Low‐Temperature Thermistor Applications

Luo, Wei; Yao, H. J.; Yang, Pinghua; Chen, Chusheng

doi:10.1111/j.1551-2916.2009.03289.x

Cited by 56 publications

(20 citation statements)

References 26 publications

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“…Besides Ni and Mn present in the cubic nickel manganite spinel oxide, different elements such as Cu, Zn, Fe, Co, Mg, Si have been added in varied amounts and combinations while retaining the cubic spinel structure [1,3,8,14,15]. Addition of other metal elements influences the three basic thermistor parameters -25 , B-value and stability in different ways [17][18][19][20][21][22][23][24][25]. These parameters are also strongly influenced by the manufacturing conditions that include the powder preparation procedure and processing conditions such as the sintering temperature, rate of cooling and sintering duration.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors

Aleksić

Nikolić

Luković

et al. 2013

Materials Science and Engineering: B

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors

Aleksić

Nikolić

Luković

et al. 2013

Materials Science and Engineering: B

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“…This graph shows the relationship between natural logarithm of resistivity and reciprocal temperature 1/T . The plots of all the samples can be described by Arrhenius relationship [19][20][21][22]:…”

Section: Electrical Characteristicsmentioning

confidence: 99%

CaTiO3 nano ceramic for NTCR thermistor based sensor application

2014

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Abstract:It is possible to fabricate highly sensitive NTCR (negative temperature coefficient of resistance) thermistor using nano crystalline CaTiO 3 synthesized by high energy ball milling. Disc shaped green pellets were prepared and effects of sintering on the disc pellets were studied as thermistor by sintering the samples at 1000 ℃, 1100 ℃ and 1200 ℃. The as-prepared samples were characterized by X-ray diffraction (XRD), impedance analysis and electrical measurement. The resistivity of the prepared samples varies predictably with temperature: this makes them promising material for temperature sensor. The experimental results prove that nano crystalline CaTiO 3 ceramic is one kind of thermistor with exponential negative temperature coefficient of resistance in the temperature range of 300-500 ℃. The samples have the advantages of rapid response, high sensitivity and capability to withstand thermal surges over the temperature range of 300-500 ℃. Resistance-temperature characteristics are described by thermistor equation with thermistor constant around 4003 K to 10795 K and thermal coefficient of resistance α around 1%/℃ to 13%/℃. The activation energy is in the range of 0.34-0.93 eV. The observed thermistor parameters are found to be comparable with many of the known thermistor materials. This suggests that the electrical properties can be adjusted to desirable values by controlling the temperature parameter. The influence of fabrication process of disc thermistor and electrical properties are discussed. The study shows the potential of nano crystalline CaTiO 3 to act as an NTCR material for thermistor applications.

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“…Manganese-based, transition metal, spinel oxide ceramics, with the general formula AB 2 O 4 , have generated much interest as negative temperature coefficient (NTC) thermistors in various domestic and industrial applications owing to their high temperature sensitivity, fast response, convenience in use, and low cost [1][2][3]. In the spinel structure, the oxygen anions are arranged in a cubic close-packed configuration with cations occupying one-eighth of the tetrahedral interstices (A sites) and half of the octahedral interstices (B sites) [4,5].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of NiMn2O4 negative temperature coefficient ceramics by solid-state coordination reaction

Gao

Sun³

2014

J Mater Sci: Mater Electron

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The influence of synthesis parameters, such as calcination temperature and sintering temperature, on the microstructure, phase composition, and electrical properties of NiMn 2 O 4 negative temperature coefficient (NTC) ceramics was systematically investigated. The NiMn 2 O 4 NTC ceramics were synthesized via solid-state coordination reaction. With increasing sintering temperatures, the relative density increased, whereas the porosity decreased. Single-phase, cubic spinel ceramic was obtained following sintering at 900 and 1,050°C, whereas a secondary phase, i.e., NiO, was detected when the sintering temperature was higher than 1,100°C. High-density ceramics were obtained when the sintering temperature was higher than 1,100°C, and featured the lowest room temperature resistivity of 2,924 X cm and thermal constant B of 3,429 K. The latter parameter reflects the temperature sensitivity of the NTC ceramics. Variations of the electrical property were because of increases in density and onset of decomposition.

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Negative Temperature Coefficient Material with Low Thermal Constant and High Resistivity for Low‐Temperature Thermistor Applications

Cited by 56 publications

References 26 publications

Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors

Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors

CaTiO3 nano ceramic for NTCR thermistor based sensor application

Preparation and characterization of NiMn2O4 negative temperature coefficient ceramics by solid-state coordination reaction

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