Solution Synthesis of Cubic Spinel Mn–Ni–Cu–O Thermistor Powder

Le, Duc Thang; Ju, Heongkyu

doi:10.3390/ma14061389

Cited by 8 publications

(9 citation statements)

References 54 publications

(115 reference statements)

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“…Such a dependence is typical for thermistors with negative temperature coefficient, i.e., thermally sensitive resistors with negative dR/dT, which are generally made of ceramics or polymers. An important figure of merit for the thermometer layer material is the temperature coefficient of resistance α = (dR/dT)/R, whose typical values range from −3 to −6% • C −1 [22]. Another important characteristic of the thermistors is a so-called B value defined by Equation (1) (both temperatures are in Kelvin):…”

Section: Discussionmentioning

confidence: 99%

Large Negative Photoresistivity in Amorphous NdNiO3 Film

et al. 2021

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A significant decrease in resistivity by 55% under blue lighting with ~0.4 J·mm−2 energy density is demonstrated in amorphous film of metal-insulator NdNiO3 at room temperature. This large negative photoresistivity contrasts with a small positive photoresistivity of 8% in epitaxial NdNiO3 film under the same illumination conditions. The magnitude of the photoresistivity rises with the increasing power density or decreasing wavelength of light. By combining the analysis of the observed photoresistive effect with optical absorption and the resistivity of the films as a function of temperature, it is shown that photo-stimulated heating determines the photoresistivity in both types of films. Because amorphous films can be easily grown on a wide range of substrates, the demonstrated large photo(thermo)resistivity in such films is attractive for potential applications, e.g., thermal photodetectors and thermistors.

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Section: Discussionmentioning

confidence: 99%

Large Negative Photoresistivity in Amorphous NdNiO3 Film

et al. 2021

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“…Various ceramic materials have been employed towards fabrication of wide range temperature sensors, some having a sensing range as high as 1500 • C[28-31] using complex low and high temperature co-firing techniques (LTCC and HTCC). Transient metal oxides such as Ni x Mn 2−x O 4 [32], MnNiCuO [33], and BiFeO 3 [14] have been used to fabricate NTC thermistor. The fabrication of ceramic sensing devices usual employs ultra high sintering temperatures and inert environments which increases overall fabrication cost and complexity [34].…”

Section: Introductionmentioning

confidence: 99%

All Screen Printed and Flexible Silicon Carbide NTC Thermistors for Temperature Sensing Applications

Wadhwa,

Guerrero,

Gratuze

et al. 2024

Preprint

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In this study, Silicon Carbide (SiC) nano-particle based serigraphic printing inks were formulated to fabricate highly sensitive and wide temperature range SiC printed thermistors. Initially, commercial silver ink was screen printed to fabricate inter-digitated electrodes (IDE’s) onto flexible Kapton® substrate via screen printing. Thermistor inks with different weight ratios of SiC nano- particles dispersed in polyimide resin matrix were fabricated. The SiC-polyimide temperature sensing inks were screen printed atop the IDE structures to form fully printed thermistors and encapsulated with a adhesive backed polyimide film for humidity inhibition. The high temperature tolerance of the Kapton® allowed the the sensors to be tested over a wide temperature range form 25◦C to 170◦C. The printed SiC thermistors exhibit excellent repeatability and stability over 15 hours of continuous operation. Optimal device performance was achieved with 30 wt.% SiC-polyimide ink. We report highly sensitive devices with a temperature coefficient of Resistance (TCR) of -0.556 %/◦C, a thermal coefficient of 502 K (β-index) and an activation energy of 0.08 eV which are comparable with printed thermistors previous reported. Further, the thermistor demonstrates an accuracy of ±1.35◦C which is well within the range offered by commercially available high sensitivity thermistors. SiC thermistors exhibit a small 6.5% drift due to changes in relative humidity between 10-90 %RH and a 4.2 % drift in baseline resistance after 100 cycles of aggressive bend testing at a 40°angle. The use of commercially available low cost materials, simplicity of design and fabrication techniques coupled with the chemical inertness of the Kapton® substrate and SiC nanoparticles paves the way to use all-printed SiC thermistors towards a wide range of applications where temperature monitoring is vital for optimal system performance.

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“…Various ceramic materials have been employed toward the fabrication of wide-range temperature sensors, some having a sensing range as high as 1500 °C [ 28 , 29 , 30 ] using complex low and high-temperature co-firing techniques (LTCC and HTCC). Transient metal oxides such as

[ 31 ],

[ 32 ] and

[ 14 ] have been used to fabricate NTC thermistors. The fabrication of ceramic-sensing devices usual employs ultra high sintering temperatures and inert environments, which increases the overall fabrication cost and complexity [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

All Screen Printed and Flexible Silicon Carbide NTC Thermistors for Temperature Sensing Applications

Wadhwa,

Benavides-Guerrero,

Gratuze

et al. 2024

Materials

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In this study, Silicon Carbide (SiC) nanoparticle-based serigraphic printing inks were formulated to fabricate highly sensitive and wide temperature range printed thermistors. Inter-digitated electrodes (IDEs) were screen printed onto Kapton® substrate using commercially avaiable silver ink. Thermistor inks with different weight ratios of SiC nanoparticles were printed atop the IDE structures to form fully printed thermistors. The thermistors were tested over a wide temperature range form 25 °C to 170 °C, exhibiting excellent repeatability and stability over 15 h of continuous operation. Optimal device performance was achieved with 30 wt.% SiC-polyimide ink. We report highly sensitive devices with a TCR of −0.556%/°C, a thermal coefficient of 502 K (β-index) and an activation energy of 0.08 eV. Further, the thermistor demonstrates an accuracy of ±1.35 °C, which is well within the range offered by commercially available high sensitivity thermistors. SiC thermistors exhibit a small 6.5% drift due to changes in relative humidity between 10 and 90%RH and a 4.2% drift in baseline resistance after 100 cycles of aggressive bend testing at a 40° angle. The use of commercially available low-cost materials, simplicity of design and fabrication techniques coupled with the chemical inertness of the Kapton® substrate and SiC nanoparticles paves the way to use all-printed SiC thermistors towards a wide range of applications where temperature monitoring is vital for optimal system performance.

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Solution Synthesis of Cubic Spinel Mn–Ni–Cu–O Thermistor Powder

Cited by 8 publications

References 54 publications

Large Negative Photoresistivity in Amorphous NdNiO3 Film

Large Negative Photoresistivity in Amorphous NdNiO3 Film

All Screen Printed and Flexible Silicon Carbide NTC Thermistors for Temperature Sensing Applications

All Screen Printed and Flexible Silicon Carbide NTC Thermistors for Temperature Sensing Applications

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