Crystal Growth and Some Properties of LuB₄, LuAlB₄, and Lu₂AlB₆

• Okada Shigeru

  Faculty of Engineering, Kanagawa University, 3–27–1 Rokkakubashi, Kanagawa–ku, Yokohama 221, Japan

• Yu Yang

  Institute of Chemistry, University of Uppsala, Box 531, S–751 21 Uppsala, Sweden

• Lundström Torsten

  Institute of Chemistry, University of Uppsala, Box 531, S–751 21 Uppsala, Sweden

• Kudou Kunio

  Faculty of Engineering, Kanagawa University, 3–27–1 Rokkakubashi, Kanagawa–ku, Yokohama 221, Japan

• Tanaka Takaho

  National Institute for Research in Inorganic Materials, 1–1 Namiki, Tsukuba, Ibaraki 305, Japan

書誌事項

タイトル別名

• Crystal Growth and Some Properties of LuB4, LuAlB4, and Lu2AlB6.
• Crystal Growth and Some Properties of L

抄録

Crystals of LuB₄, LuAlB₄, and Lu₂AlB₆ were grown by the high-temperature aluminium solution method using lutetium oxide and crystalline boron powders as starting materials. The growth conditions for obtaining single crystals of relatively large size were investigated. The as-grown LuB₄, LuAlB₄, and Lu₂AlB₆ crystals were subjected to chemical analysis and measurements of unit cell parameters. The Vickers microhardness and electrical resistivity of the crystals were measured, and oxidation at high temperature in air was studied. Average values of Vickers microhardness (Hv) and electrical resistivity (ρ ) determined for LuAlB₄ and Lu₂AlB₆ single crystals are as follows: for LuAlB₄ Hv=14.0(± 0.6) GPa, ρ =86(± 6) µ Ω· cm, and for Lu₂AlB₆ Hv=18.9(± 0.7) GPa, ρ =31(± 3) µ Ω· cm. The oxidation of LuB₄, LuAlB₄, and Lu₂AlB₆ crystals begins to occur at about 590^° C, 960^° C and 1030^° C, respectively. The final oxidation products of LuB₄ include LuBO₃ and probably amorphous B₂O₃ or H₃BO₃. However, the oxidation products of LuAlB₄ and Lu₂AlB₆ crystals were not detected by powder X-ray diffraction, probably due to insufficient amounts of these oxidation products.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 35 (9A), 4718-4723, 1996

  The Japan Society of Applied Physics

キーワード

• LuB<SUB> 4</SUB>
• LuAlB<SUB> 4</SUB>
• Lu<SUB> 2</SUB>AlB<SUB> 6</SUB>
• aluminium flux
• morphology
• crystal size
• unit cell parameter
• chemical analysis
• microhardness
• electrical resistivity

詳細情報

• CRID: 1390282681226512256
• NII論文ID: 10004613226
• NII論文ID: 130004522802
• NII論文ID: 210000039679
• NII書誌ID: AA10457675
• DOI: 10.1143/jjap.35.4718
• ISSN: 13474065
• ISSN: 00214922
• NDL書誌ID: 4060154
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4060154
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.35.4718
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.35.4718/pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可