High-Temperature Neutron Diffraction Study of Y4Al2O9

Hisanori Yamane, Masahiko Shimada, Brett A. Hunter

研究成果: Article査読

53 被引用数 (Scopus)

抄録

The anisotropic thermal expansion and anisotropy of lattice volume change in Y4Al2O9at 1370°C were confirmed by high-temperature neutron diffraction of the sintered polycrystalline sample. The cell volume of the high-temperature phase is approximately 0.4% smaller than that of the low-temperature phase. The crystal structure of the high-temperature phase was determined by Rietveld analysis. It crystallizes in a monoclinic cell,a=7.4804(4) Å,b=10.5461(5) Å,c=11.2057(7) Å, andβ=108.927(4)° at 1518°C,Z=4 with space groupP21/c, which is identical to the space group of the low-temperature phase. The phase transition was concluded to be diffusionless by comparison of the crystal structures of the high- and low-temperature phases. At the transition, the atoms in the unit cell move cooperatively on the slip planes of oxygen atoms parallel to the (010) plane along theaaxis.

本文言語English
ページ(範囲)466-474
ページ数9
ジャーナルJournal of Solid State Chemistry
141
2
DOI
出版ステータスPublished - 1998 12月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 凝縮系物理学
  • 物理化学および理論化学
  • 無機化学
  • 材料化学

フィンガープリント

「High-Temperature Neutron Diffraction Study of Y4Al2O9」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル