中性子回折による無機材料の結晶構造とイオン拡散経路の研究

• 八島 正知

  東京工業大学大学院理工学研究科物質科学専攻

書誌事項

タイトル別名

• Crystal Structure and Ion-Diffusion Pathway of Inorganic Materials through Neutron Diffraction
• チュウセイシ カイセツ ニ ヨル ムキ ザイリョウ ノ ケッショウ コウゾウ ト イオン カクサン ケイロ ノ ケンキュウ

抄録

The present brief review describes the application of neutron powder diffractometry and maximum-entropy method to the studies of crystal structure and diffusional pathways of mobile ions in ionic conducting ceramic materials. La_0.62Li_0.16TiO₃ and Li_0.6FePO₄ exhibit two- and one-dimensional networks of Li cation diffusional pathways, respectively. In the fluorite-structured ionic conductors such as ceria solid solution Ce_0.93Y_0.07O_1.96, bismuth oxide solid solution δ-Bi_1.4Yb_0.6O₃ and copper iodide CuI, a similar curved diffusion pathway along the ‹100› directions is observed. In the cubic ABO₃ perovskite-type ionic conductor, lanthanum gallate solid solution, the mobile ions diffuse along a curved line keeping the interatomic distance between the B cation and O^2- anion. We have experimentally confirmed that the anisotropic thermal motions of the apex O2 atom and the interstitial O3 atoms are essential for the high oxygen permeability of the K₂NiF₄-type mixed conductor. Diffusion paths of proton are visualized along c axis in hexagonal hydroxyapatite.

収録刊行物

• 表面科学

  表面科学 33 (5), 284-289, 2012

  公益社団法人 日本表面科学会

キーワード

• neutron powder diffraction
• Rietveld analysis
• maximum-entropy method
• crystal structure
• diffusion pathway

詳細情報

• CRID: 1390282681436092160
• NII論文ID: 10030756310
• NII書誌ID: AN00334149
• DOI: 10.1380/jsssj.33.284
• COI: 1:CAS:528:DC%2BC38XhtFOitb7P
• ISSN: 18814743
• ISSN: 03885321
• NDL書誌ID: 023780672
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023780672
• Web Site: https://www.jstage.jst.go.jp/article/jsssj/33/5/33_284/_pdf
• 本文言語コード: ja
• データソース種別:
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  • NDL
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• 抄録ライセンスフラグ: 使用不可