Issue 2, 2019

How to quantify isotropic negative thermal expansion: magnitude, range, or both?

Abstract

Negative thermal expansion (NTE) is the useful and counterintuitive material property of volume contraction on heating. Isotropic NTE is the rarest and most useful type, and is known to occur in a variety of different classes of materials. In this focus article we ask the simple question of how best to compare NTE behaviour amongst these different systems? We summarise the two main mechanisms for isotropic NTE, and illustrate how these favour alternatively NTE magnitude and NTE range. We argue in favour of a combined metric of NTE capacity, which balances both effects and allows unbiased identification of the most remarkable NTE materials, irrespective of the underlying microscopic mechanism at play. By organising known NTE materials according to these various metrics, we find intuitive trends in behaviour that help identify key materials for specific NTE applications.

Graphical abstract: How to quantify isotropic negative thermal expansion: magnitude, range, or both?

Supplementary files

Article information

Article type
Focus
Submitted
31 Eost 2018
Accepted
28 Gwen. 2018
First published
04 Here 2018

Mater. Horiz., 2019,6, 211-218

How to quantify isotropic negative thermal expansion: magnitude, range, or both?

C. S. Coates and A. L. Goodwin, Mater. Horiz., 2019, 6, 211 DOI: 10.1039/C8MH01065J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements