Highly oriented platinum/iridium thin films for high-temperature thermocouples with superior precision

The long-term precise high-temperature measurement of thin-film thermocouples (TFTCs) has attracted attention due to the capability of instantaneous temperature detection. However, related technologies have seen slow development, and there is no one standard TFTC yet. Here, we focus on a new strateg...

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Published in:Physical chemistry chemical physics : PCCP 2022-03, Vol.24 (1), p.6163-6168
Main Authors: Ma, Kexin, Cao, Lili, Luo, Fei, Zhou, Haitao, Liu, Dabo, Luo, Bingwei, Xu, Yi, Cui, Jinting, Zhao, Xiaohui
Format: Article
Language:English
Subjects:
Defects
High temperature
Interface stability
Iridium
Platinum
Polynomials
Temperature measurement
Thermocouples
Thin films
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cited_by cdi_FETCH-LOGICAL-c337t-f2e8f0b3a60ea4bd154cdf836784871f508d4d3f72732ace17dbf2118f224c243
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container_title Physical chemistry chemical physics : PCCP
container_volume 24
creator Ma, Kexin
Cao, Lili
Luo, Fei
Zhou, Haitao
Liu, Dabo
Luo, Bingwei
Xu, Yi
Cui, Jinting
Zhao, Xiaohui
description The long-term precise high-temperature measurement of thin-film thermocouples (TFTCs) has attracted attention due to the capability of instantaneous temperature detection. However, related technologies have seen slow development, and there is no one standard TFTC yet. Here, we focus on a new strategy of reducing alloys for the easy preparation and performance enhancement of TFTCs via nanostructure and interface design. To this end, we fabricated a platinum/iridium (Pt/Ir) pure-element TFTC with a well matched interface and few defects, which demonstrated excellent long-term service stability over a high-temperature range. The corresponding polynomial fitting coefficients were ≥0.99999, indicating the accurate acquisition of temperature data. A reduced deviation (
doi_str_mv 10.1039/d1cp05196b
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However, related technologies have seen slow development, and there is no one standard TFTC yet. Here, we focus on a new strategy of reducing alloys for the easy preparation and performance enhancement of TFTCs via nanostructure and interface design. To this end, we fabricated a platinum/iridium (Pt/Ir) pure-element TFTC with a well matched interface and few defects, which demonstrated excellent long-term service stability over a high-temperature range. The corresponding polynomial fitting coefficients were ≥0.99999, indicating the accurate acquisition of temperature data. A reduced deviation (&lt;0.21%) between three calibration cycles was obtained over a wide temperature range of 300 °C to 1000 °C, which is better than the maximum precision of a standard wire thermocouple. Superior properties are achieved because of the resulting fewer defects in the Pt and Ir thin films with highly preferential orientation along the (111) plane. The results indicate that our Pt/Ir TFTCs have significant potential for application in many domains such as thermal detection, microelectronics and aero-engines. 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source Royal Society of Chemistry:Jisc Collections:Royal Society of Chemistry Read and Publish 2022-2024 (reading list)
subjects Defects
High temperature
Interface stability
Iridium
Platinum
Polynomials
Temperature measurement
Thermocouples
Thin films
title Highly oriented platinum/iridium thin films for high-temperature thermocouples with superior precision
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