Hot Isostatic Pressing of Submicron La_2Zr_2O_7 Powder Prepared by the Hydrazine Method

この論文にアクセスする

この論文をさがす

著者

抄録

In the ZrO<SUB>2</SUB>-La<SUB>2</SUB>O<SUB>3</SUB> system, metastable c-ZrO<SUB>2</SUB> solid solutions (ss) containing up to ≈27 mo1% La<SUB>2</SUB>O<SUB>3</SUB> crystallize at low temperatures from amorphous materials prepared by the hydrazine method The formation of La<SUB>2</SUB>Zr<SUB>2</SUB>O<SUB>7</SUB> proceeds via two reaction processes; (i) decomposition of c-ZrO<SUB>2</SUB> (ss) (c-ZrO<SUB>2</SUB> (ss) → La<SUB>2</SUB>Zr<SUB>2</SUB>O<SUB>7</SUB> + t-ZrO<SUB>2</SUB>) above 1100°C and (ii) asolid-state reaction of t-ZrO<SUB>2</SUB> and La<SUB>2</SUB>O<SUB>3</SUB> at 1200° to 1300°C. Submicron La<SUB>2</SUB>Zr<SUB>2</SUB>O<SUB>7</SUB> powder is producedat 1300°C. Dense La<SUB>2</SUB>Zr<SUB>2</SUB>O<SUB>7</SUB> ceramics (99. 5% of theoretical) with an average grain size of 10 μm have been fabricated by hot isostatic pressing (1500°C/2h/196MPa). Their fracture toughness and bending strength are 1. 9 MPa-m<SUP>1/2</SUP> and 172 MPa, respectively. They exhibit an electrical conductivity of 1. 5x10<SUP>-1</SUP> S-m<SUP>-1</SUP> at 1000°C.

収録刊行物

  • 高圧力の科学と技術 = The Review of high pressure science and technology

    高圧力の科学と技術 = The Review of high pressure science and technology 7, 1063-1065, 1998

    The Japan Society of High Pressure Science and Technology

参考文献:  8件中 1-8件 を表示

  • <no title>

    KIDO H.

    J. Am. Ceram. Soc. 74, 422, 1991

    被引用文献1件

  • <no title>

    ISHIDA K.

    J. Am. Ceram. Soc. 77, 1391, 1994

    被引用文献3件

  • <no title>

    MIYAMOTO Y.

    New Horizons for Materials, Advances in Science and Technology 387, 1995

    被引用文献1件

  • <no title>

    Joint Committee on Powder Diffraction Standards Swarthmore PA

    Powder Diffraction FIle, No. 17-450, 1991

    被引用文献1件

  • <no title>

    NIIHARA K.

    J. Mater. Sci. Lett. 1, 13, 1982

    被引用文献11件

  • <no title>

    LABRINCHA J. A.

    J. Mater. Sci. 28, 3809, 1993

    DOI 被引用文献1件

  • <no title>

    POULSEN F. W.

    Solid State Ionics 53/56, 777, 1992

    DOI 被引用文献1件

  • <no title>

    ETSELL T. H.

    Chem Rev. 70, 339-376, 1970

    DOI 被引用文献10件

各種コード

  • NII論文ID(NAID)
    10002692813
  • NII書誌ID(NCID)
    AN10452913
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    0917639X
  • NDL 記事登録ID
    4494148
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z17-1589
  • データ提供元
    CJP書誌  NDL  J-STAGE 
ページトップへ