Reaction Products of the Compounds of the System CaO-Al<sub>2</sub>O<sub>3</sub> in Phosphoric Acid Solutions at 200°C under 10MPa
-
- YAMAZAKI Kengo
- Research Laboratory of Engineering Materials, Tokyo Institute of Technology
-
- YAMAGUCHI Yoshinobu
- Towa Reffactory Engineering Co., Ltd.
-
- NAKAZAWA Toshihiko
- Research Laboratory of Engineering Materials, Tokyo Institute of Technology
-
- YOSHIMURA Masahiro
- Research Laboratory of Engineering Materials, Tokyo Institute of Technology
-
- SOMIYA Shigeyuki
- Research Laboratory of Engineering Materials, Tokyo Institute of Technology
Bibliographic Information
- Other Title
-
- CaO‐Al2O3系化合物の200°C,10MPaリン酸溶液中における反応生成物
- CaO Al2O3ケイ カゴウブツ ノ 200ドC 10MPa リンサン ヨウ
Search this article
Abstract
Reaction or hydration of the compounds of the system CaO-Al2O3 in phosphoric acid soiutions was studied by hydrothermal techniques at 200°C under the pressure of 10MPa. The products of the system treated for 1day, 10days and 30days were C3AH6, AH (Boehmite), Ca10(PO4)6(OH)2: HAp, CaHPO4 and 3 types of AlPO4, Berlinite (Ber.), Tridymite form (Tri.) and Cristobalite form (Cri.). The products in low phosphoric acid solntions were C3AH6, AH and HAp. In the region where the reaction occurred instead of hydration, CaHPO4 or Tri. tended to form instead of AH on HAp. The formation region of C3AH6 appeared to extend between the lines from CaHPO4 and HAp to Al2O3 in the system CaO-Al2O3-H3PO4 (H2O).<br>In the comparison of the results of 100°C under 10MPa with those of 200°C under 10MPa hydrothermal treatment, the produced phases of aluminum phosphate seemed to have a correspondence such as Lucin-type variscite→Cri., Messbach-type variscite→Tri. and Metavariscite→Ber..<br>CaHPO4 and Ber. formed together in high phosphoric acid region above the line of H3PO4/CaO+Al2O3+H3PO4≅50mol%.
Journal
-
- Journal of the Ceramic Association, Japan
-
Journal of the Ceramic Association, Japan 90 (1038), 56-63, 1982
The Ceramic Society of Japan
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390282680192978688
-
- NII Article ID
- 110002311881
-
- NII Book ID
- AN00245650
-
- ISSN
- 18842127
- 00090255
-
- NDL BIB ID
- 2440915
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed