Synthesis and properties of the negative thermal expansion material cubic ZrMo{sub 2}O{sub 8}
- Georgia Inst. of Tech., Atlanta, GA (United States). School of Chemistry and Biochemistry
- Argonne National Lab., IL (United States)
Materials that exhibit negative thermal expansion are of considerable scientific and technological interest. Their use in composites can facilitate the control of bulk thermal expansion properties to obtain a good match to other system components or zero expansion. Zero, or close to zero, thermal expansion is needed for various applications in optics, electronics, and other fields where exact positioning of parts is crucial. Nearly all materials that undergo negative thermal expansion display this property over a narrow temperature range or show anisotropic expansion behavior that can lead to microcracks. Recently, isotropic negative thermal expansion over the temperature range 0.3--1050 K has been reported for cubic ZrW{sub 2}O{sub 8} along with studies of its behavior under pressure. The structural similarity of many tungsten and molybdenum compounds strongly suggested the possibility of a cubic ZrMo{sub 2}O{sub 8} with related properties. Sleight and co-workers have recently prepared compositions in the solid solution ZrW{sub 2{minus}x}Mo{sub x}O{sub 8}, although they have been unable to make samples with x > 1.5. Here the authors report the first preparation and characterization of the end member cubic XrMo{sub 2}O{sub 8}.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 669759
- Journal Information:
- Chemistry of Materials, Vol. 10, Issue 9; Other Information: PBD: Sep 1998
- Country of Publication:
- United States
- Language:
- English
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