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Matin Amani - One of the best experts on this subject based on the ideXlab platform.
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thin film Thermocouples based on the system in2o3 sno2
Journal of the American Ceramic Society, 2011Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic Thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing Thermocouple of all compositions studied.
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Thermoelectric Properties of ZnxInyOx + 1.5y Films
Journal of The Electrochemical Society, 2011Co-Authors: Otto J. Gregory, Matin AmaniAbstract:Ceramic thin film Thermocouples are being developed to replace noble metal Thermocouples operating within the harsh environments of advanced turbine engines used for power generation and propulsion. Seebeck coefficients as large as 158 μV/°C were determined for indium oxide (In 2 O 3 ) at 950°C and 256 μV/°C for zinc oxide (ZnO) at 1250°C relative to platinum reference electrodes. Because these Seebeck coefficients are appreciably larger than those for metallic Thermocouples, alloys in the system indium zinc oxide (Zn x In y O x+1.5y ) were investigated by cosputtering from high purity ZnO and In 2 O 3 targets. Thermocouple libraries were patterned with platinum reference electrodes and rapidly screened using combinatorial chemistry techniques. Thermoelectric response, power, and resistivity were determined for each Thermocouple in the library. Thermocouples with the optimum compositions were prepared and the resulting power factor of the biceramic junctions was determined from 75 to 650°C.
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Thin‐Film Thermocouples Based on the System In2O3–SnO2
Journal of the American Ceramic Society, 2010Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic Thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing Thermocouple of all compositions studied.
Otto J. Gregory - One of the best experts on this subject based on the ideXlab platform.
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Diffusion barrier coatings for CMC Thermocouples
Surface and Coatings Technology, 2018Co-Authors: Kevin Rivera, Matthew Ricci, Otto J. GregoryAbstract:Abstract A platinum:silicon carbide Thermocouple has been developed to measure the surface temperature of ceramic matrix composites (CMC) with high resolution. Platinum was deposited by rf sputtering onto a SiC-SiC CMC substrates coated with a dielectric, such that the SiC-SiC CMC was one thermoelement and the platinum film was another thermoelement comprising the Pt:SiC(CMC) Thermocouple. The purpose of the dielectric was to electrically isolate the platinum leads from the SiC-SiC CMC. The thermoelectric output, hysteresis and drift of the Pt:SiC(CMC) Thermocouples were measured at temperatures ranging from 600 °C to 1000 °C. The thermoelectric powers generated by the Pt:SiC Thermocouples were an order in magnitude greater than conventional Pt:Pd or Type K Thermocouples. Thermoelectric powers as large as 250 μV/K were reported for these Thermocouples, as compared to thermoelectric powers of 10 μV/K reported for Pt:Pd and Type K Thermocouples. The results presented within show that the Pt:SiC(CMC) Thermocouples exhibit excellent stability at high temperatures, relatively low drift rates, and little hysteresis during thermal cycling. However, the Pt:SiC junctions were prone to oxidation effects as well as the formation of platinum silicides at high temperature, which can compromise the junction and lead to excessive drift. Therefore, a number of diffusion barrier coatings were applied to the Pt:SiC junctions in an attempt to improve stability and lower drift in this promising new class of Thermocouples.
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thin film Thermocouples based on the system in2o3 sno2
Journal of the American Ceramic Society, 2011Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic Thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing Thermocouple of all compositions studied.
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Thermoelectric Properties of ZnxInyOx + 1.5y Films
Journal of The Electrochemical Society, 2011Co-Authors: Otto J. Gregory, Matin AmaniAbstract:Ceramic thin film Thermocouples are being developed to replace noble metal Thermocouples operating within the harsh environments of advanced turbine engines used for power generation and propulsion. Seebeck coefficients as large as 158 μV/°C were determined for indium oxide (In 2 O 3 ) at 950°C and 256 μV/°C for zinc oxide (ZnO) at 1250°C relative to platinum reference electrodes. Because these Seebeck coefficients are appreciably larger than those for metallic Thermocouples, alloys in the system indium zinc oxide (Zn x In y O x+1.5y ) were investigated by cosputtering from high purity ZnO and In 2 O 3 targets. Thermocouple libraries were patterned with platinum reference electrodes and rapidly screened using combinatorial chemistry techniques. Thermoelectric response, power, and resistivity were determined for each Thermocouple in the library. Thermocouples with the optimum compositions were prepared and the resulting power factor of the biceramic junctions was determined from 75 to 650°C.
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Thin‐Film Thermocouples Based on the System In2O3–SnO2
Journal of the American Ceramic Society, 2010Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic Thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing Thermocouple of all compositions studied.
Ximing Chen - One of the best experts on this subject based on the ideXlab platform.
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thin film Thermocouples based on the system in2o3 sno2
Journal of the American Ceramic Society, 2011Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic Thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing Thermocouple of all compositions studied.
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Thin‐Film Thermocouples Based on the System In2O3–SnO2
Journal of the American Ceramic Society, 2010Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic Thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing Thermocouple of all compositions studied.
A. A. Ulanowsky - One of the best experts on this subject based on the ideXlab platform.
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stability of a cable nicrosil nisil Thermocouple under thermal cycling
TEMPERATURE: Its Measurement and Control in Science and Industry; Volume VII; Eighth Temperature Symposium, 2003Co-Authors: A. V. Belevtsev, A. V. Karzhavin, A. A. UlanowskyAbstract:Experimental data on the stability of cable Nicrosil‐Nisil Thermocouples (type N) under step‐by‐step thermal cycling in the temperature range 20 to 1100°C and also under long‐term heating in air at the temperature 1085 ± 10 °C are presented. The analysis of the influence of thermal cycling on thermal EMF drift is carried out. We conclude that N type Thermocouples can be used as the reference Thermocouple for the calibration of industrial base‐metal Thermocouples.
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Stability of a Cable Nicrosil‐Nisil Thermocouple under Thermal Cycling
AIP Conference Proceedings, 2003Co-Authors: A. V. Belevtsev, A. V. Karzhavin, A. A. UlanowskyAbstract:Experimental data on the stability of cable Nicrosil‐Nisil Thermocouples (type N) under step‐by‐step thermal cycling in the temperature range 20 to 1100°C and also under long‐term heating in air at the temperature 1085 ± 10 °C are presented. The analysis of the influence of thermal cycling on thermal EMF drift is carried out. We conclude that N type Thermocouples can be used as the reference Thermocouple for the calibration of industrial base‐metal Thermocouples.
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A Method for Testing the Quality of Cable Thermocouple Junctions
AIP Conference Proceedings, 2003Co-Authors: A. V. Karzhavin, A. V. Belevtsev, A. A. UlanowskyAbstract:A method for revealing technological defects in the hot junction of a cable Thermocouple is proposed. Disadvantages of existing (traditional) methods are considered. The method proposed is based on the Peltier effect inside a Thermocouple junction. The method is implemented for outlet quality control during the production of cable Thermocouples.
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Stability of a Cable Nicrosil‐Nisil Thermocouple under Thermal Cycling
AIP Conference Proceedings, 2003Co-Authors: A. V. Belevtsev, A. V. Karzhavin, A. A. UlanowskyAbstract:Experimental data on the stability of cable Nicrosil‐Nisil Thermocouples (type N) under step‐by‐step thermal cycling in the temperature range 20 to 1100°C and also under long‐term heating in air at the temperature 1085 ± 10 °C are presented. The analysis of the influence of thermal cycling on thermal EMF drift is carried out. We conclude that N type Thermocouples can be used as the reference Thermocouple for the calibration of industrial base‐metal Thermocouples.
Gang Niu - One of the best experts on this subject based on the ideXlab platform.
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a new kind of Thermocouple made of p type and n type semi conductive oxides with giant thermoelectric voltage for high temperature sensing
Journal of Materials Chemistry C, 2018Co-Authors: Peng Shi, Dan Liu, Wei Ren, Yantao Liu, Gang NiuAbstract:A new kind of Thermocouple consisting of n-type and p-type semi-conductive oxides with a giant thermoelectric voltage is reported. The Thermocouple was fabricated from n-type La0.8Sr0.2CrO3 and p-type In2O3 and it exhibits a high thermoelectric voltage of 410.3 mV at 1270 °C, which is the highest value reported for any type of Thermocouples to date. This achievement challenges the long-established material selection principles for Thermocouples and opens a new way for designing highly sensitive thermal sensors. The Thermocouple developed in this work has great potential for practical applications in high temperature sensing in harsh environments.