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Giant thermal expansion in 2D and 3D cellular materials

Zhu, Hanxing, Fan, Tongxiang, Peng, Qing and Zhang, Di 2018. Giant thermal expansion in 2D and 3D cellular materials. Advanced Materials 30 (18) , 1705048. 10.1002/adma.201705048

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Abstract

When temperature increases, the volume of an object changes. This property was quantified as the coefficient of thermal expansion only a few hundred years ago. Part of the reason is that the change of volume due to the variation of temperature is in general extremely small and imperceptible. Here, abnormal giant linear thermal expansions in different types of two‐ingredient microstructured hierarchical and self‐similar cellular materials are reported. The cellular materials can be 2D or 3D, and isotropic or anisotropic, with a positive or negative thermal expansion due to the convex or/and concave shape in their representative volume elements respectively. The magnitude of the thermal expansion coefficient can be several times larger than the highest value reported in the literature. This study suggests an innovative approach to develop temperature‐sensitive functional materials and devices.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Wiley-VCH Verlag
ISSN: 0935-9648
Related URLs:
Date of First Compliant Deposit: 17 January 2018
Date of Acceptance: 17 January 2018
Last Modified: 25 Mar 2019 02:30
URI: http://orca.cf.ac.uk/id/eprint/108234

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