publication . Article . Other literature type . 1996

Negative Thermal Expansion from 0.3 to 1050 Kelvin in ZrW2O8

Arthur W. Sleight; John S. O. Evans; T. A. Mary; Thomas Vogt;
  • Published: 05 Apr 1996 Journal: Science, volume 272, pages 90-92 (issn: 0036-8075, eissn: 1095-9203, Copyright policy)
  • Publisher: American Association for the Advancement of Science (AAAS)
Negative thermal expansion was found for ZrW 2 O 8 from 0.3 kelvin to its decomposition temperature of about 1050 kelvin. Both neutron and x-ray diffraction data were used to solve and refine the structure of this compound at various temperatures. Cubic symmetry persists for ZrW 2 O 8 over its entire stability range. Thus, the negative thermal expansion behavior is isotropic. Essentially the same behavior was found for isostructural HfW 2 O 8 . No other materials are known to exhibit such behavior over such a broad temperature range. These materials are finding applications as components in composites in order to reduce the composites9 overall thermal expansion ...
free text keywords: Multidisciplinary, Atmospheric temperature range, Chemistry, Negative thermal expansion, Thermal decomposition, Isotropy, Rigid unit modes, Thermodynamics, Thermal expansion, Mineralogy, Diffraction, Zirconium tungstate, chemistry.chemical_compound
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