Hot Isostatic Pressing of Y2O3-Doped La2Zr2O7 Prepared by the Hydrazine Method.

• Takano Yoshihiko

  Tanaka Galvanizing Co. LTD.

• Matsumura Yoshinori

  Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University

• Yoshinaka Masaru

  Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University

• Hirota Ken

  Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University

• Yamaguchi Osamu

  Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University

Bibliographic Information

Other Title

• Hot Isostatic Pressing of Y2O3-Doped La

Abstract

Pyrochlore La₂Zr₂O₇ containing 8 mol% Y₂O₃ crystallizes at 825°to 885°C from an amorphous material prepared by the hydrazine method. The lattice parameter is α=1.0751 nm; this value is smaller than that (α=1.0793 nm) of pure La₂Zr₂O₇. Dense Y₂O₃-doped La₂Zr₂O₇ ceramics (99.7% of theoretical) with an average grain size of 3.8 μm have been fabricated by hot isostatic pressing for 2 h at 1500°C and 196 MPa. They exhibit electrical conductivity of 1.6 S⋅m^-1 at 1000°C. Activation energies are 0.82 and 0.58 eV for initial (400°-540°C) and final (540°-1000°C) stages, respectively.

Journal

• Journal of the Japan Society of Powder and Powder Metallurgy

  Journal of the Japan Society of Powder and Powder Metallurgy 45 (6), 586-589, 1998

  Japan Society of Powder and Powder Metallurgy

Keywords

• hot isostatic pressing
• lanthanum zirconate
• yttria
• electrical conductivity

Details

• CRID: 1390001206308574976
• NII Article ID: 10002052299
• NII Book ID: AN00222724
• DOI: 10.2497/jjspm.45.586
• ISSN: 18809014
• ISSN: 05328799
• NDL BIB ID: 4502284
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4502284
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed