Effect of Ultrasonication on Colloidal Dispersion of Al_2O_3 and ZrO_2 Powders in pH Controlled Suspension

この論文にアクセスする

この論文をさがす

著者

抄録

Colloidal processing is well known to be an effective method to avoid the agglomeration of particles in powder processing. In this method, particles are dispersed by the electrostatic repulsion arising from their surface charge which can be controlled by the pH-value of the suspension. Since fine particles tend to agglomerate, however, additional re-dispersion treatment is necessary to obtain dispersed suspension of submicrometer-sized particles. In this study was used ultrasonication such as additional re-dispersion treatment for the dispersion of fine powders. Al<SUB>2</SUB>O<SUB>3</SUB> and ZrO<SUB>2</SUB> used in this study were high-purity fine powders and their particle sizes were 0.2 and 0.07 μm, respectively. Three types of suspensions were prepared under different conditions of mixing with ultrasonication for various treatment periods. With increasing degree of ultrasonication, the apparent viscosity of suspension decreased, the dispersion of the particles in the suspensions was promoted and the relative densities of the compacts and the sintered specimens increased, because of a decrease in both total pore volume and the pore size. The microstructure of the sintered specimen prepared from the sufficiently ultrasonicated suspension was very fine, which resulted in high superplasticity.

収録刊行物

  • Materials transactions, JIM

    Materials transactions, JIM 39(6), 689-692, 1998-06

    社団法人 日本金属学会

参考文献:  12件中 1-12件 を表示

  • <no title>

    LANGE F. F.

    Am. Ceram. Soc. Bull. 66, 1498, 1987

    被引用文献1件

  • <no title>

    LANGE F. F.

    J. Am. Ceram. Soc. 72, 3, 1989

    被引用文献9件

  • <no title>

    SUZUKI T. S.

    J. Jpn Soc. Powder and Powder Metall. 44, 356, 1997

    被引用文献1件

  • <no title>

    HUISMAN W.

    J. Europ. Ceram. Soc. 13, 33, 1989

    被引用文献1件

  • <no title>

    CESARAMO J. III

    J. Am. Ceram. Soc. 71, 250, 1988

    被引用文献5件

  • <no title>

    HIRATA Y.

    Advances in Materials, Processing and Manufacturing, Proc. of Adv. Mat. Tech. Ceram. Workshop (4), 3, 1988

    被引用文献1件

  • <no title>

    KIMURA T.

    Advanced Materials '93, I/A ; Ceramics, Powders, Corrosion and Advanced Processing 14A, 793, 1994

    被引用文献1件

  • <no title>

    WAKAI F.

    Proc. of MRS Intern. Symposium on Advanced Materials, Superplasticity 7, 259, 1989

    被引用文献1件

  • <no title>

    OKADA K.

    J. Am. Ceram. Soc. 79, 499, 1996

    被引用文献3件

  • <no title>

    DAVIES T. J.

    Acta Mater. 44, 2373, 1996

    被引用文献2件

  • <no title>

    KONSZTOWICZ K. J.

    J. Mater. Sci. 31, 1633, 1996

    DOI 被引用文献1件

  • <no title>

    AKSAY I. A.

    J. Am. Ceram. Soc. 66, C190-192, 1983

    被引用文献11件

被引用文献:  6件中 1-6件 を表示

各種コード

  • NII論文ID(NAID)
    10003803036
  • NII書誌ID(NCID)
    AA10699969
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09161821
  • NDL 記事登録ID
    4505438
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ