Negative Thermal Expansion from 0.3 to 1050 Kelvin in ZrW <sub>2</sub> O <sub>8</sub>

  • T. A. Mary
    T. A. Mary, J. S. O. Evans, A. W. Sleight, Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA.
  • J. S. O. Evans
    T. A. Mary, J. S. O. Evans, A. W. Sleight, Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA.
  • T. Vogt
    T. Vogt, Physics Department, Brookhaven National Laboratory, Upton, NY 11973, USA.
  • A. W. Sleight
    T. A. Mary, J. S. O. Evans, A. W. Sleight, Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA.

抄録

<jats:p> Negative thermal expansion was found for ZrW <jats:sub>2</jats:sub> O <jats:sub>8</jats:sub> 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 <jats:sub>2</jats:sub> O <jats:sub>8</jats:sub> over its entire stability range. Thus, the negative thermal expansion behavior is isotropic. Essentially the same behavior was found for isostructural HfW <jats:sub>2</jats:sub> O <jats:sub>8</jats:sub> . 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 composites' overall thermal expansion to near zero. </jats:p>

収録刊行物

  • Science

    Science 272 (5258), 90-92, 1996-04-05

    American Association for the Advancement of Science (AAAS)

被引用文献 (87)*注記

もっと見る

キーワード

詳細情報

問題の指摘

ページトップへ