In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 29, No. 7 ( 2014-04-14), p. 849-855
Abstract:
At room temperature (RT), Fe 2 Mo 3 O 12 is stable in monoclinic structure phase and above 780 K it transforms to an orthorhombic phase. Experiment shows that in the high temperature orthorhombic phase, the material exhibits low or negative thermal expansion property. In the paper, new compounds with the formula Fe 2– x (ZrMg) 0.5 x Mo 3 O 12 ( x = 0–1.8) are reported. The compounds are designed and synthesized to reduce the phase transition temperature of the Fe 2 Mo 3 O 12 by substitutional co-incorporation of Zr 4+ and Mg 2+ in it. It is found that the monoclinic-to-orthorhombic phase transition temperature can be lowered effectively by the co-incorporation. The orthorhombic phase of Fe 0.4 (ZrMg) 0.8 Mo 3 O 12 may be obtained at RT and it may keep the orthorhombic structure as low as 103 K. Meanwhile, the co-incorporation of Zr 4+ and Mg 2+ may tailor the coefficient of thermal expansion (CTE) of the Fe 2 Mo 3 O 12 and the near-zero CTEs are obtained for the compound around x = 1.7 (Fe 0.3 (ZrMg) 0.85 Mo 3 O 12 ). This work paves the way toward developing low-cost and near-zero thermal expansion materials over wide temperature ranges.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2014
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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