Densification and Enhancement of the Hydration Resistance of CaO with Aluminum

알루미늄을 첨가한 CaO의 치밀화와 내수화성 증진

  • 이용구 (경남대학교 무기재료공학과) ;
  • 이철규 (경남대학교 무기재료공학과) ;
  • 전병세 (경남대학교 무기재료공학과)
  • Published : 1995.05.01

Abstract

In this research, the emphasis was focused on the rearrangement and densification behavior of CaO particles when the aluminum was added to improve the hydration resistance. For the case of 0.5vol% Al added specimen, the rearrangement of CaO particles due to liquid aluminum was terminated near 140$0^{\circ}C$ where the theoretically calculated fractional volume of solid reached 0.74 under Ar atmosphere. The density of the specimen sintered at 155$0^{\circ}C$ for 5hrs reached 96% of relative theoretical density when the ambient was switched to O2 at intermediate and final stages of the sintering. The weight gain due to the hydration after 60 days under 72% of relative humidity at 26$^{\circ}C$ was less than 1%.

Keywords

Sintering;CaO with Al;Hydration

References

  1. J. Am. Ceram. Soc. v.52 no.8 CaO:Ⅱ, Properties R.W. Rice
  2. Yogyo Kyokai Shi v.87 no.1 Study on Preventing Agent Against Slaking of Calcia Clinker H. Nagayama
  3. 特許 v.60 no.51 山元公聖;北見幹治;兼安彰
  4. J. Appl. Phy. v.30 no.3 Densification during Sintering in the Presence of a Liquid Phase. I. Theory W.D. Kingery
  5. Refractories v.41 no.7 Application of Dry Ramming Materials Containing CaO to Tundish Work Lining Y. Hayashi;Y. Watanabe;N. Shigematsu;A. Yamamoto
  6. The Science of Soap Films and Soap Bubbles C. Isenberg
  7. 特許 v.62 no.265 松井久仁雄;瀧英和
  8. Refractories v.35 no.8 Some Considerations on Characteristics of Sintered Calcia Clinker S. Tanaka;H. Takahashi;K. Nonobe;K. Anan;M.Takahasi
  9. Gypsum & Lime v.154 no.123 Review of Lime Refractories S .Motoi
  10. Institute of Industry and Technology, Theses Collection v.8 Rearrangement of the Ultrafine Alumina LPS B.S. Jun
  11. J. Am. Ceram. Soc. v.31 no.7 Viscosity Studies of System CaO-MgO-Al₂O₃-SiO₂: Ⅱ. CaO-Al₂O₃-SiO₂ J.S. Machin;T.B. Yee
  12. J. Am. Ceram. Soc. v.64 no.10 Densification of Alumina and Silica in the Presence of a Liquid Phase V.K. Singh
  13. J. Am. Ceram. Soc. v.52 no.8 CaO·I, Fabrication and Characterization R.W. Rice
  14. Testu To Hangane v.63 no.10 Application of Calcia Electric Arc Furnace Hearth and Its Effect on Oxide Inclusions in Steel H .Nagayama
  15. Am. Ceram. Soc. Bull. v.48 no.6 Some Properties of Lime Refractories D.H. Hubble
  16. Trans. Indian Ceram. Soc. v.37 no.3 Studies on the Eutectic Sintering of MgO and Al₂O₃ G.N. Agrawal;M.D. Narasimhan
  17. Refractories v.33 no.12 Properties of Lime Clinker Y. Hoshino;M. Oishi
  18. 特許 v.62 no.278 松井久仁雄;福田降生
  19. 特許 v.55 no.35 永山宏
  20. Refractories v.41 no.12 Preventive Methods for Calcia and Dolomite Clinkers Y. Oda
  21. Gypsum & Lime v.157 no.244 Lime Refratories K. Hamano
  22. Refractories v.33 no.12 Characters of Calcia Clinker N. Nameishi;T. Ishibashi;Y. Yokoyama;T.Shimizu
  23. Ph. D. thesis Liquid Phase Sintering and Hot Isostatic Pressing of an Alumina Glass Composite: Modeling and Experiments O.H. Kwon
  24. Refractories v.42 no.12 CaO Clinker Improving Hydration F. Kawano;I. Yamoto;J. Nomura;J. Yoshitomi;A. Ikesue;H. Sikano
  25. Refractories v.34 no.11 Sintered Calcia Clinker S. Kitamura;T. Nakazato;Y. Haibara;Y. Kawazumi
  26. U.S.Patent no.2916389 High-Calcium Lime Refractories and Method for Making Them R.W. McAllister
  27. J. Am. Ceram. Soc. v.62 no.11-12 The Nature of CaO Produced by Calcite Powder Decomposition in Vacuum and in CO₂ J. Ewing;D. Beruto;A.W. Searcy
  28. Liquid Phase Sintering R.M. German