Enhanced negative thermal expansion by solid solution of HfMgMo1.5W1.5O12
HfMgMo3O12 exhibits a low positive thermal expansion and HfMgW3O12 displays a low negative thermal expansion (NTE). It is found that the solid solution of HfMgMo1.5W1.5O12 has an enhanced NTE with lower anisotropy with respect to HfMgMo3O12 and HfMgW3O12. The coefficients of thermal expansion (CTEs) for HfMgMo1.5W1.5O12 are α a = –6.78 × 10–6 K–1, α b = 6.59 × 10–6 K–1, α c = –5.23 × 10–6 K–1, α v = –6.19 × 106– K–1 for the a-, b- and c-axes and volume, respectively. This gives rise to a linear CTE of α l = –2.06 × 10–6 K–1. The alternative arrangements of W and Mo around each octahedra and differences in electronegativity and cation radius between W and Mo account probably for the enhanced NTE and decreased anisotropy with respect to HfMgMo3O12.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: December 1, 2016
More about this publication?
- Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Ingenta Connect is not responsible for the content or availability of external websites