Preparation, characterization and electrical properties of spinel-type environment friendly thick film NTC thermistors

Jagtap, Shweta; Rane, Sunit; Gosavi, Suresh; Amalnerkar, Dinesh

doi:10.1016/j.jeurceramsoc.2008.03.027

Cited by 67 publications

(23 citation statements)

References 16 publications

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“…It is also observed that the oxide particles are homogeneously dispersed in glassy matrix and the grain growth in the film confirms the sintering of the film. However, as expected, some small pores are also seen on the surfaces of the film which are occurred due to the evolution of trapped gases while burning of organic binders existed in thick film paste during firing process [9][10][12][13][14][15].…”

Section: Microstructure Analysissupporting

confidence: 63%

“…Therefore the recent RoHS (Restriction of Hazardous Substances) guidelines restricted such hazardous substances from the electronic products forced the electronic industry toward environmental friendly manufacturing solutions resulting the production of selected 'green' electronic materials such as conductors and solders. On the other hand till toady, 'green' thick film resistors are not available commercially in the market but only limited academic research in particular to resistors [6][7][8][9][10][11] and thermistors [12][13][14][15][16] towards the formulation of 'green' resistors and thermistors have been carried out at laboratory scale.…”

Section: Introduction mentioning

confidence: 99%

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Synthesis, Characterization and Fabrication of NTC Thick Film Thermistor Using Lead Free Glass Frit

Jagtap¹,

Rane²,

Gosavi³

2016

JMSE-A

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Thermistors are important and attractive in microelectronic and opto-electronic systems due to their unique thermoelectric properties and their applications in air flow sensor, IR detectors, temperature sensors etc. In the present study, mixed transition manganite semiconducting ceramics with spinel structures are used for the preparation of negative temperature co-efficient (NTC) ceramic thermistor. Here, we report the preparation of NTC powders by co-precipitation of chlorides of Mn, Co, Ni and its lead free thick film thermistors. The synthesized NTC powders as well as its thick films were characterized by TGA, XRD, and SEM. The prepared thick film thermistors showed thermistor constant () in the range 3,562-4,334 K over the temperature range of 25-250 ºC.

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Section: Microstructure Analysissupporting

confidence: 63%

Section: Introduction mentioning

confidence: 99%

Synthesis, Characterization and Fabrication of NTC Thick Film Thermistor Using Lead Free Glass Frit

Jagtap¹,

Rane²,

Gosavi³

2016

JMSE-A

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“…The experimental data show NTCR property. The dependence of resistance on temperature approximately follows an exponential [11][12][13][14][15][16][17][18]. Hence the experimental data match with the Steinhart-Hart equation, revealing the significance of nano crystalline CaTiO 3 as a promising environment friendly material for high temperature thermistor application.…”

Section: Electrical Characteristicsmentioning

confidence: 70%

“…The first aspect is to prepare nanosize material for modern electronic applications, and the other is replacing traditional compositions that are based on toxic elements. Considering the importance of the above noted issues, we have initiated the development of lead free thermistor [12,13]. CaTiO 3 is low cost, and if we use this material in devices, the device cost will be decreased.…”

Section: Introductionmentioning

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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“…Broadly, these are of two types, NTC-negative temperature coefficient thermistors and PTC-positive temperature coefficient thermistors. NTC are used mostly in temperature sensing [18][19][20], while PTC used mostly in electric current control [21][22][23].…”

Section: Thermistorsmentioning

confidence: 99%