Graduate Aerospace Laboratories, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, 91125, USA.
Adv Mater. 2014 May 21;26(19):3076-80. doi: 10.1002/adma.201304997. Epub 2014 Feb 22.
Ultra-low coefficient of thermal expansion (CTE) is an elusive property, and narrow temperature ranges of operation and poor mechanical properties limit the use of conventional materials with low CTE. We structured a periodic micro-array of bi-metallic cells to demonstrate ultra-low effective CTE with a wide temperature range. These engineered tunable CTE thin film can be applied to minimize thermal fatigue and failure of optics, semiconductors, biomedical sensors, and solar energy applications.
超低热膨胀系数（CTE）是一种难以捉摸的特性，而传统低 CTE 材料的工作温度范围较窄和机械性能较差限制了其使用。我们构建了周期性的双金属单元微阵列，以展示具有宽温度范围的超低有效 CTE。这些工程可调 CTE 薄膜可应用于最大限度地减少光学、半导体、生物医学传感器和太阳能应用中的热疲劳和失效。
