Inkjet Printed Interdigitated Conductivity Cells with Low Cell Constant

In this paper, the design and fabrication of a liquid conductivity sensor based on AgPd paste will be described. The device was designed in a four-electrode configuration on a 10 x 25 mm2 96% Al2O3 substrate. The distance between the two driving electrodes was 4 mm, whereas the distance between the two measuring electrodes was 2 mm.The device was also integrated with a Ruthenium based temperature sensor printed on the backside of the substrate. Initial characterisation showed that the conductivity sensor has a measured sensitivity and cell constant of 1.67 cm and 0.51 cm-1, respectively, when a frequency of 1 kHz square wave input was appliedto the driving electrodes. Sensor’s respond variation against temperature was measured around 27.89 μS/°C, corresponding to 2.22 temperature compensation value for salt solution. The results showed a stable response over 5 days measurement cycle, indicating the sensor’s potential for field water quality monitoring application.

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Measuring Electrical Conductivity of Al-Sc Alloy by Application of Continuously Varying Cell Constant Technique

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.531-532.329 ◽

2012 ◽

Vol 531-532 ◽

pp. 329-332 ◽

Cited By ~ 1

Author(s):

Rui Guo ◽

Bing Zhang ◽

Wen Xi Zhang

Keyword(s):

Electrical Conductivity ◽

Lithium Fluoride ◽

Molten Salts ◽

Relevant Literature ◽

Influence Factors ◽

Conductivity Measurement ◽

Cell Constant ◽

Electrical Conductivity Measurement ◽

Different Temperatures ◽

Main Influence

The electrical conductivity of the molten salts of Na3AlF6-LiF-Sc2O3 system with different compositions was measured at different temperatures by the continuously varying cell constant technique. The main influence factors on electrical conductivity were analyzed. Experiment results showed that the technique of the electrical conductivity measurement is accurate and reliable and the result’s relative error is just 0.67% in comparison with those in relevant literature. With temperature rising, electrolyte conductivity increases at a rate of about 0.03S/cm for 1°C. And we also found that the conductivity increases slightly with the addition of lithium fluoride and adding scandium oxide makes the conductivity decrease slightly and more addition doesn’t cause significant effect. It was proved that the technique can measure accurately the electrical conductivity of aluminium electrolyte and other high-temperature molten salts.

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cell constant of a conductivity cell

IUPAC Compendium of Chemical Terminology ◽

10.1351/goldbook.c00918 ◽

2008 ◽

Keyword(s):

Cell Constant ◽

Conductivity Cell

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Geometric part of uncertainties in the calculation constant of the primary four electrode conductivity cell.

ACTA IMEKO ◽

10.21014/acta_imeko.v4i2.188 ◽

2015 ◽

Vol 4 (2) ◽

pp. 18 ◽

Cited By ~ 4

Author(s):

Alexander Mikhal ◽

Zygmunt Warsza

Keyword(s):

Standard Deviation ◽

Electric Field ◽

Linear Interpolation ◽

Electrolytic Conductivity ◽

Measuring Instruments ◽

Cell Constant ◽

Error Budget ◽

Accuracy Of Measurement ◽

Manufacturing Techniques ◽

Conductivity Cell

The paper presents the construction of a primary four electrode conductivity cell with calculated constant for the Ukrainian primaryÂ standard of electrolytic conductivity (EC). The equations for calculating the cell constant and the error budget for calculating uncertainty are presented. The components of the budget are: errors due to the non-uniformity of the force lines of the electric field; errorsÂ due to the accuracy of measurement standards and measuring instruments for determining length and diameter of the tube; andÂ errors due to manufacturing techniques of tubes and their assemblage. The article considers in detail the errors due to the non-ideal profile of the central part of the tube. Two methods to reduce the standard deviation are given: the method of linear interpolation forÂ compensation of the concave form which occurs along the axis of the tube and the method of equivalent triangles to compensate forÂ deviations from a circle that occur across the axis of the tube.

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A Study of the Effect of Sintering Conditions of Mg0.95Ni0.05Ti3 on Its Physical and Dielectric Properties

Molecules ◽

10.3390/molecules25245988 ◽

2020 ◽

Vol 25 (24) ◽

pp. 5988

Author(s):

Chun-Hsu Shen ◽

Chung-Long Pan ◽

Shih-Hung Lin

Keyword(s):

Dielectric Properties ◽

Temperature Coefficient ◽

Unit Cell ◽

Holding Time ◽

Q Factor ◽

Cell Constant ◽

Two Phase ◽

Solid State Route ◽

Sintering Conditions ◽

Unit Cell Constant

Mg0.95Ni0.05TiO3 ceramics were prepared by traditional solid-state route using sintering temperatures between 1300 and 1425 °C and holding time of 2–8 h. The sintered samples were characterized for their phase composition, micro-crystalline structure, unit–cell constant, and dielectric properties. A two-phase combination region was identified over the entire compositional range. The effect of sintering conditions was analyzed for various properties. Both permittivity (εr) and Q factor (Qf) were sensitive to sintering temperatures and holding times, and the optimum performance was found at 1350 °C withholding time of 4 h. The temperature coefficient of resonant frequency (τf) in a range from −45.2 to −52 (ppm/°C) and unit–cell constant were not sensitive to both the sintering temperature and holding time. An optimized Q factor of 192,000 (GHz) related with a permittivity (εr) of 17.35 and a temperature coefficient (τf) of −47 (ppm/°C) was realized for the specimen sintered at 1350 °C withholding time of 4 h. For applications of 5G communication device (filter, antennas, etc.), Mg0.95Ni0.05TiO3 is considered to be a suitable candidate for substrate materials.

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