Recent advancements in materials science have led to significant improvements in the performance of thin film thermocouples, particularly those used in high-temperature environments such as aeroengines. A study conducted by MA Kexin and her team at the Institute of Materials Science and Engineering, Beihang University, has unveiled how the deposition temperature of indium tin oxide (ITO) thin films can be finely tuned to enhance their thermoelectric properties.
The research, published in ‘Cailiao gongcheng’ (Materials Engineering), demonstrates that the crystallinity and overall performance of ITO films are directly influenced by the temperature at which they are deposited. “By adjusting the deposition temperature, we can significantly improve the surface diffusion and growth capabilities of the sputtering atoms, which directly impacts the carrier mobility of ITO,” Kexin explains. This fine-tuning results in a triangular grain morphology and a preferred orientation that enhances the films’ structural integrity.
At a deposition temperature of 450 degrees Celsius, the ITO films exhibited remarkable properties, including an interface bonding force of 10.89 mN and a power factor of 400 μW/(m·K²) at a testing temperature of 900 degrees Celsius. These enhancements are crucial for applications requiring rapid and accurate temperature measurements, especially in the demanding conditions found in aerospace engineering.
The implications of this research extend beyond academic interest; they hold significant commercial potential for the energy sector. As industries increasingly rely on precise temperature control for efficiency and safety, the enhanced thermoelectric properties of ITO thin films could lead to the development of more reliable and responsive thermocouples. This could translate into improved performance and longevity of high-temperature components in various applications, from jet engines to power generation systems.
Kexin’s findings could pave the way for innovative applications in thermal management and energy conversion technologies. As the demand for efficient energy solutions grows, the ability to accurately measure and control temperatures in extreme conditions will become increasingly vital.
For further details on this groundbreaking study, you can visit the Institute of Materials Science and Engineering, Beihang University.
