Influence of Composition and Construction Parameters on the Basic Properties of Thick Film Thermistors

Gołonka, Leszek; Kozłowski, J.; Licznerski, B.W.; Nitsch, K.; Seweryn, Artur

doi:10.1108/eb044568

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Both the resistivity and thermistor constant are weakly dependent on RuO 2 content up to 16 wt%. Both parameters change rapidly above this amount of modifier [9,10]. These results suggest the complete rearrangement of the conductive network in the film; RuO 2 becomes the predominant functional phase whereas spinel should be treated as the modifier in a RuO 2 -glass system.…”

Section: Thick-film Thermistorsmentioning

confidence: 88%

Thick-film resistive temperature sensors

Dziedzic

Gołonka

Kozłowski

et al. 1997

Meas. Sci. Technol.

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This paper discusses thick-film resistive temperature sensors investigated at the Technical University of Wroclaw. The technology and electrical properties of resistance temperature detectors, thermistors, low-temperature thermometers and heating elements are presented. The R(T) curve of chosen air-fireable Ni - P based films agrees with Ni wire. The initially aged thermistors from the system can operate in the range from room temperature up to 673 K. The commercial thick-film resistors modified by the negative TCR drivers (e.g. powder) are fully suitable for low-temperature measurements in the range from 20 to 100 K. The integrated gas sensors need heaters because temperature influences their sensitivity, selectivity and response time. The thick-film compatible system based on commercially available resistive and conductive inks allows continuous long-term electrical heating of the sensor up to 673 K. The admissible operating temperature is much higher for the heaters made from conductive inks; for example fritless platinum heaters are satisfactory up to 1073 K.

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Section: Thick-film Thermistorsmentioning

confidence: 88%

Thick-film resistive temperature sensors

Dziedzic

Gołonka

Kozłowski

et al. 1997

Meas. Sci. Technol.

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“…A simple and well‐known method for preparing NTC thermistor powder based on complex spinel (Mn, Ni, Co, Fe) 3 O 4 was used (Buchanan, 1986; Golonka, 1992). An oxide mixture containing MnO/NiO in the ratio 4:1 and 0.5 percent CoO and Fe 2 O 3 in the form of a fine aggregate was calcinated at 1050°C/1 h and ball milled for 2 h in an ultra fast ball mill until a nanometer particle size of 20‐30 nm was achieved.…”

Section: Ntc Thermistor Powder Compacts and Paste Preparation And Characterizationmentioning

confidence: 99%

Volume air flow sensors based on NTC thick film segmented thermistors

Obrad

Pantelija²,

Konstantinos³

2006

Microelectronics International

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PurposeThe aim of this paper is to investigate the behavior of a new nanometric particle NTC thermistor paste and thick films obtained by screen printing.Design/methodology/approachNanometric powder of NTC thermistors based on complex spinel was made by calcination of an oxide mixture and ultra fast ball milling. Characterization of the new powder was done on compacts sintered in different conditions. Segmented thermistors were screen printed on alumina substrata, dried and fired in a conveyor furnace at 850°C/10 min. Segmented thermistors were indirectly heated by a glass sealed heater placed between them in the middle. The system was put in a tube with a regulated air flow to serve as a volume thermistor sensor based on heat loss.FindingsThe sintered thick film samples and NTC powder compacts measurements could help in choosing the optimal technology conditions during the production of NTC devices. The NTC segmented thermistors were suitable both for heated sensors and self heated sensors.Practical implicationsLow temperature thick film thermistor pastes based on nanometer powder of complex spinel are of interest due to their importance in sensor applications.Originality/valueThis work predicts that high temperature pastes of the same material can be realized with characteristics superior to those of low temperature paste such as NTC 3K3 or similar.

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“…Thick film geometries were investigated not long after that, and custom design thermistors for miscellaneous sensors were introduced (Fu and Chiou, 1984; Arima, 1995). Our nanometric thermistor paste called NTC 3K3 95/2 was developed in the last decade using the complex spinel mentioned above (Ikegami, 1980; Golonka, 1992), than characterized and applied for printing of different types of thermistors such as sandwich, multilayer, segmented and interdigitated (Aleksić et al , 1999, 2002). Recently a few sensors applications, such as volume air flow sensor and 3D anemometer comprising segmented thermistors (Aleksić 2005), moved us to renew experiments with geometries and introduce modeling and simulation prior to printing.…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of NTC thick film thermistor geometries

Aleksić

Radojcić²,

Ramovic³

2007

Microelectronics International

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PurposeThe paper aims to focus on thick film planar thermistors.Design/methodology/approachThick film planar thermistors such as rectangular, sandwich, multilayer, segmented and interdigitated were printed of law temperature NTC paste called NTC 3K3 95/2 (Ei Iritel). Their resistivity was measured at room temperature as a function of volume resistivity variations due to electrode effect (diffusion of PdAg into NTC layer) and variation of geometrical parameters such as length l, width w, thickness d, number of segments n. The experimental data obtained were used in forming a model by the simple fitting procedure for counting diffusion effect on volume resistivity and resistivity dependence on geometrical parameters.FindingsThermal behavior of NTC thick films was measured in the range of −30‐120°C. Exponential factor B was fitted for measured values and included in the proposed thick film thermistors model. The agreement of measured and calculated data enables simulation of new thermistor geometries.Originality/valueThe paper focuses on the experiment which was the first step in forming a total physical/mathematical model proposed for thick film thermistor resistivity.

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Influence of Composition and Construction Parameters on the Basic Properties of Thick Film Thermistors

Cited by 6 publications

References 2 publications

Thick-film resistive temperature sensors

Thick-film resistive temperature sensors

Volume air flow sensors based on NTC thick film segmented thermistors

Modeling and simulation of NTC thick film thermistor geometries

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