球状カオリナイトからのムライトの析出

DOI Web Site Web Site 被引用文献2件

書誌事項

タイトル別名
  • Exsolution of Mullite from Spherical Kaolinite
  • キュウジョウ カオリナイト カラ ノ ムライト ノ セキシュツ

この論文をさがす

抄録

Precipitation of mullite from the spherical kaolinite fired at 900°-1400°C has been studied by means of electron microscopy and powder X-ray diffractometry. The starting kaolinite which has spherical shape with concentric layering has been synthesized under hydrothermal condition. The following results were obtained:<br>(1) The reaction sequence was observed as: metakaolinite→γ-Al2O3+SiO2 (amorph.)→Al rich mullite+SiO2 (amorph.)→3:2 mullite+cristobalite. (2) The initially formed mullite was Al-rich and a and b axes were almost the same as those of tetragonal mullite. (3) The morphology of mullite grains changed from elliptical through lath-like to prismatic shape. Acicular or needle-like mullite grains which have been reported on the fired platy kaolinite were rarely observed. (4) Some prismatic mullite grains were formed along the relict surface of spherical kaolinite. However, no mullite with 120° configuration were observed as reported on a hexagonal platy kaolinite. (5) These differences in morphology and orientation of mullite were attributed to the difference in lattice deformation of the starting kaolinite structures.

収録刊行物

  • 窯業協會誌

    窯業協會誌 94 (1092), 917-921, 1986

    公益社団法人 日本セラミックス協会

被引用文献 (2)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ