Effects of Cu and Zn co-doping on the electrical properties of Ni0.5Mn2.5O4 NTC ceramics

Zhao, Chunhua; Wang, Biyun; Yang, Pinghua; Winnubst, Louis; Chen, Chusheng

doi:10.1016/j.jeurceramsoc.2007.06.007

Cited by 106 publications

(68 citation statements)

References 13 publications

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“…[8][9][10][11] For such applications, different NMO film types or bulk devices with a wide range of dopants are commonly used in order to tune the device performance to the application's requirements. [12][13][14] Nevertheless, the pure NMO compound is still the subject of recent research efforts in order to establish new and more efficient synthesis routes [15][16][17][18][19][20][21] and thin and thick film production techniques. [22][23][24][25][26][27][28][29][30][31] Furthermore, the interplay between the physical properties and the Ni and Mn cation distribution on the tetrahedral and octahedral sublattices is still a matter of debate.…”

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In-plane impedance spectroscopy in aerosol deposited NiMn2O4 negative temperature coefficient thermistor films

Ryu

Park

Schmidt

2011

Journal of Applied Physics

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Temperature dependent in-plane impedance spectroscopy measurements were carried out in order to analyze the charge transport properties of functional oxide NiMn2O4 negative temperature coefficient thermistor films deposited via aerosol deposition techniques onto glass and Al2O3 substrates. The in-plane resistivity (ρ) versus temperature (T) curves of all films were uniform over a large temperature range (180 K to 500 K) and showed the typical exponential power-law behavior associated with variable-range hopping. The ρ-T dependences of annealed and as-deposited films exhibited power-law exponents p of about 0.6 and thermistor constants B in the range of 3500 K to 5000 K. As-deposited films showed higher p values as compared to annealed films. As-deposited films exhibited also increased B values, leading to increased sensitivity of the resistance to temperature changes, whereas annealed films deposited on Al2O3 showed the lowest scatter in differentiated ρ-T data and might display superior reliability for temperature sensing applications.

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confidence: 99%

In-plane impedance spectroscopy in aerosol deposited NiMn2O4 negative temperature coefficient thermistor films

Ryu

Park

Schmidt

2011

Journal of Applied Physics

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“…In order to further decrease the resistivity, Cu is doped into nickel manganites, e.g., the resistivity of Cu 0.2 Ni 0.5 Mn 2.3 O 4  decreases to 70 Ω·cm. However, the doping of Cu will cause a harmful consequence, i.e., the resistivity drift rate is 14.9% after ageing at 150 ℃ for 500 h in air [9]. For improving the ageing characteristic, much work has been done by cation doping and microstructure modification [9][10][11].…”

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confidence: 99%

“…However, the doping of Cu will cause a harmful consequence, i.e., the resistivity drift rate is 14.9% after ageing at 150 ℃ for 500 h in air [9]. For improving the ageing characteristic, much work has been done by cation doping and microstructure modification [9][10][11]. For instance, Ma et al [12] reported that the resistivity drift for Ni 0.…”

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confidence: 99%

Characterization of new negative temperature coefficient thermistors based on Zn–Ni–O system

Sun

Zhang

et al. 2016

J Adv Ceram

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Y 2 O 3 -doped Zn 1x Ni x O (x = 0, 0.3, 0.4, 0.5, 0.6, 0.7, and 0.9) powders were prepared by a wet chemical synthesis method, and the related ceramics were obtained by the traditional ceramic sintering technology. The phases and related electrical properties of the ceramics were investigated. The analysis of X-ray diffraction (XRD) indicates that the prepared ceramics with Ni substitution have a cubic crystalline structure. The resistance-temperature feature indicates that all the ceramics show a typical effect of negative temperature coefficient (NTC) of resistivity with the thermal constants between 3998 and 5464 K, and have high cyclical stability in a temperature range from 25 to 300 ℃. The impedance analysis reveals that both grain effect and grain boundary effect contribute collectively to the NTC effect. The electron hopping and band conduction models are proposed for the grain (bulk) conduction, and the thermally activated charge carrier transport overcoming the energy barrier is suggested for the grain boundary conduction.

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“…Various bulk ceramics and thin/thick films with a wide range of adjustable thermistor parameters can be used in order to satisfy the market needs in the different industrial field and tune the device performance to the specific requirements [1][2][3][4]. In general, the bulk ceramics can easily achieve low room-temperature resistivity (q 25 ) and high thermistor constant (b) by tuning the compositions and dopants [5,6]. For the thermistor thick/thin films, it is very difficult to obtain the low q 25 and high b.…”

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confidence: 99%

Microstructures and electrical properties of Sr0.6Bi0.4Fe0.6Sn0.4O3–BaCoII 0.02CoIII 0.04Bi0.94O3 thick-film thermistors with low room-temperature resistivity

Yuan

Yang

Luo

et al. 2014

J Mater Sci: Mater Electron

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The thick film NTC thermistor of compositions Sr 0.6 Bi 0.4 Fe 0.6 Sn 0.4 O 3 ? BaCo II 0.02 Co III 0.04 Bi 0.94 O 3 , synthesized by solid state reaction, were prepared by screen-printing on alumina substrate. The microstructures, composition dependent, impedance characteristics, self-heating behaviours and thermistor properties were investigated. The relation between logarithm of resistivity and reciprocal of absolute temperature for the thick film thermistor was almost linear for all the compositions studied. The room-temperature resistivity, thermistor constant and activation energy of the films decreased with increasing BaCo II 0.02 Co III 0.04 Bi 0.94 O 3 content and were in the range of 18.2-945.7 X cm, 1,753-2,649 K and 0.151-0.228 eV, respectively. The thick films showed the nearest-neighbor hopping or variable-range hopping model depended on the compositions. Impedance analysis indicated that the resistivity value of the thick films was mainly ascribed to the contribution of grains. At higher BaCo II 0.02 Co III 0.04 Bi 0.94 O 3 content, a good self-heating effect of one thermistor film was observed.

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Effects of Cu and Zn co-doping on the electrical properties of Ni0.5Mn2.5O4 NTC ceramics

Cited by 106 publications

References 13 publications

In-plane impedance spectroscopy in aerosol deposited NiMn2O4 negative temperature coefficient thermistor films

In-plane impedance spectroscopy in aerosol deposited NiMn2O4 negative temperature coefficient thermistor films

Characterization of new negative temperature coefficient thermistors based on Zn–Ni–O system

Microstructures and electrical properties of Sr0.6Bi0.4Fe0.6Sn0.4O3–BaCoII 0.02CoIII 0.04Bi0.94O3 thick-film thermistors with low room-temperature resistivity

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