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ORIGINAL RESEARCH article
Front. Mater.
Sec. Smart Materials
Volume 12 - 2025 | doi: 10.3389/fmats.2025.1554564
This article is part of the Research Topic Elastocaloric and Other Solid-State Technologies for Cooling and Heat Pumping: Materials, Cycles, Systems and Devices View all articles
Research on NiCr/NiSi Thin Film Thermocouple Sensor for Measuring the Surface Temperature of Automobile Engine
Provisionally accepted- Tongji University, Shanghai, China
This study describes a method for preparing thermocouple sensor based on NiCr/NiSi thin films. Using magnetron sputtering technology, the sensor structure includes a substrate, a SiO2 transition layer, a NiCr/NiSi thermocouple and a SiO2 protective layer.Experiments show that the sensor has a stable thermopotential output at 80℃ with a Seebeck coefficient of about 40.97μV/°C. By measuring the engine surface temperature of a Subaru Outback 2.5i car, the practicability of the sensor is verified. The 2×2 cm ceramic-based thermocouple used for automobile engine temperature measurement is the best choice to ensure the fast and stable operation of the temperature sensor. Experimental results show that this thermocouple achieved the highest temperature measurements of 72.85°C in comparison to other substrates, demonstrating its superior thermal conductivity and stability in high-temperature environments.
Keywords: Thin film thermocouple, Sensor, Automotive engine temperature, Magnetron sputtering method, Seebeck coefficient
Received: 02 Jan 2025; Accepted: 25 Feb 2025.
Copyright: © 2025 Wang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Haochen Wang, Tongji University, Shanghai, China
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