Influence of Elastic Deformations and Temperature on the Tensoresistive Properties of the Compound TlIn1-xCоxSe2 (0 ≤ X ≤ 0.5)
Umarov Salim Hallokovich,
Hallokov Farhod Karimovich,
Narzullaeva Zilola Mukhitdinovna
Issue:
Volume 11, Issue 4, July 2022
Pages:
67-70
Received:
18 February 2022
Accepted:
12 March 2022
Published:
26 July 2022
DOI:
10.11648/j.ajmp.20221104.11
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Abstract: The paper presents the results of studying the influence of various external physical factors, including elastic deformations and temperature, on the tensoresistive mechanisms of single crystals of solid solutions TlIn1-xCоxSe2 (0 ≤ х ≤ 0.5). The effect of temperature on the strain sensitivity of TlIn1-xCoxSe2 single crystals in the cobalt concentration range 0 ≤ x ≤ 0.5 was determined. A mode of synthesis and growth of single crystals of solid solutions TlIn1-xCoxSe2 (0 ≤ x ≤ 0.5) by the improved Bridgman-Stockbarger method with the use of electronic temperature controllers was developed to maintain the optimal thermal regime during crystallization. The directional crystallization rate was about 0.9 mm/h. TlIn1-xCoxSe2 single crystals had p-type conductivity. The samples for the study were made by cleaving single crystals in two mutually perpendicular planes of a natural cleavage and had the shape of a rectangular parallelepiped. The dimensions of the studied samples were 10x10x0.25 mm3. Ohmic contacts are obtained by spot welding of the corresponding wires (ø = 0.01 mm) by a capacitor discharge on the ends of samples heated in an inert gas flow. A technique has been developed for strain gauge measurements in a static mode at a temperature of 300–400 K. The study of tensoresistive mechanisms of TlIn1-xCoxSe2 solid solution single crystals has led to very interesting results. First of all, it should be emphasized that these crystals exhibit a strong piezoresistive effect in the direction of the [001] crystallographic axis, which, in combination with their mechanical, elastic, crystallographic and other features, makes them very promising materials for creating new miniature highly sensitive and reliable electromechanical transducers.
Abstract: The paper presents the results of studying the influence of various external physical factors, including elastic deformations and temperature, on the tensoresistive mechanisms of single crystals of solid solutions TlIn1-xCоxSe2 (0 ≤ х ≤ 0.5). The effect of temperature on the strain sensitivity of TlIn1-xCoxSe2 single crystals in the cobalt concentr...
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Experimental Validation of TCal for DC Voltage Calibrations Through Internet
Issue:
Volume 11, Issue 4, July 2022
Pages:
71-78
Received:
16 June 2022
Accepted:
29 June 2022
Published:
26 July 2022
DOI:
10.11648/j.ajmp.20221104.12
Downloads:
Views:
Abstract: In 2018, as contribution to the area of Metrology for Industry 4.0, the concept of Touchless Calibration (TCal) was introduced. In the next three years, in many papers presented on conferences, the most important aspects of the TCal were considered. All these considerations showed that the TCal could provide a benefit for the manufacturing companies in regards the calibrations of the measurement systems used in the production processes. The next step was the experimental validation of the TCal for DC voltage calibrations and, it was done for two possible cases. The results, analysis and comments on the practical experiment in both cases, were pretty much encouraging. The work presented in this paper deals with the experiment regarding the case of use of TCal through Internet for the companies in the manufacturing industry. The experiment is done for DC voltage calibrations in the range from 0 to 10V by using a VFC (Voltage to Frequency Converter) as a Sensor&Transducer and a FVC (Frequency to Voltage Converter) as a Sensor & Actuator. The experiment is designed and executed without any physical connection between the Sensor&Transducer and Sensor&Actuator. The idea was to investigate the use of TCal through Internet, without the digital communication provided by the Industry 4.0 network. The focus was set on the worst-case scenarios. In this paper, it is shown that, the TCal through Internet can be used by the manufacturing companies for the calibration of measurement systems used to measure DC voltages in the range from 0V to 10V with tolerances (USL – LSL) bigger than 1.0677V (± 0.534V).
Abstract: In 2018, as contribution to the area of Metrology for Industry 4.0, the concept of Touchless Calibration (TCal) was introduced. In the next three years, in many papers presented on conferences, the most important aspects of the TCal were considered. All these considerations showed that the TCal could provide a benefit for the manufacturing companie...
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