Influence of Diaspore Seeding and Chloride Concentration on the Transformation of "Diasporic" Precursors to Corundum

Journal of the American Ceramic Society

Volumn 84, Issue 8, 2001, Pages 1896-1902

  Smith, Richard L ^a   Rohrer, Gregory S ^b   Perrotta, Anthony J ^c,d  

^a Massachusetts Institute of Technology Cambridge   (United States)

^b CARNEGIE MELLON UNIVERSITY   (United States)

^c ALCOA TECHNICAL CENTER   (United States)

^d PENNSYLVANIA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CALCINATION; CHLORINE COMPOUNDS; DECOMPOSITION; HYDROCHLORIC ACID; HYDROLYSIS; MIXTURES; PHASE TRANSITIONS; SYNTHESIS (CHEMICAL);

ALKOXIDE; ALUMINUM SEC BUTOXIDE; BAYER PROCESS; CHLORIDE; DIASPORE SEEDING;

CORUNDUM;

EID: 0035437599     PISSN: 00027820     EISSN: None     Source Type: Journal    
DOI: 10.1111/j.1151-2916.2001.tb00933.x     Document Type: Article

References (33)

1. W. H. Gitzen, Alumina as a Ceramic Material; pp. 1-76. American Ceramic Society, Columbus, OH, 1970.
2. K. Wefers and C. Misra, "Oxides and Hydroxides of Aluminum," Alcoa Technical Paper No. 19, Alcoa Laboratories, Pittsburgh, PA, 1987.
3. I. Levin and D. Brandon, "Metastable Alumina Polymorphs: Crystal Structures and Transition Sequences," J. Am. Ceram. Soc., 81 [8] 1995-2012 (1998).
4. H. C. Stumpf, A. S. Russell, J. W. Newsome, and C. M. Tucker, "Thermal Transformation of Aluminas and Alumina Hydrates," Ind. Eng. Chem., 42 [7] 1398-403 (1950).
5. A. J. Perrotta, "Nanosized Corundum Synthesis," Mater. Res. Innov., 2, 33-38 (1998).
6. J. M. McHale, A. Auroux, A. J. Perrolla, and A. Navrotsky, "Surface Energies and Thermodynamic Phase Stability in Nanocrystalline Aluminas," Science (Washington, DC), 277, 788-91 (1997).
7. 3," J. Phys. Chem. B, 101, 603-13 (1997).
8. 3 Transitions," Acta Crystallogr., 5, 103-108 (1952).
9. J. Lima-de-Faria, "Dehydration of Goethite and Diaspore," Z. Kristallogr., 119, 176-203 (1963).
10. A. H. Carim, G. S. Rohrer, N. R. Dando, S.-Y. Tzeng, C. L. Rohrer, and A. J. Perrotta, "Conversion of Diaspore to Corundum: A New α-Alumina Transformation Sequence," J. Am. Ceram. Soc., 80 [10] 2677-80 (1997).
11. 2O," J. Mater. Sci., 25, 4423-26 (1990).
12. 3 by Thermal Decomposition of Basic Aluminum Chlorides at Low Temperatures," Cryst. Res. Technol., 24 [7] 671-75 (1989).
13. 27AI-NMR Spectroscopic Studies on Thermal Decomposition Products of Basic Aluminum Chlorides," Cryst. Res. Technol., 25 [8] 951-56 (1990).
14. 3: An Electron Optical Study," Cryst. Res. Technol., 27 [4] 529-34 (1992).
15. P. Brand, G. Ziegenhalg, and K. Kohnke, "Kinetics and Mechanism of Corundum Formation in the Thermal Decomposition of Basic Aluminum Chloride Gels," Cryst. Res. Technol., 29 [2] 179-86 (1994).
16. 'K. Kamiya, J. Yotani, R. Senna, J. Matsuoka, and H. Nasu, "Sol-Gel Preparation of Alumina Gels Forming α-Alumina around 500°C," J. Ceram. Soc. Jpn., 107 [7] 685-87 (1996).
17. A. S. Russell and C. N. Cochran, "Surface Areas of Heated Alumina Hydrates," Ind. Eng. Chem., 42 [7] 1336-40 (1950).
18. P. Burtin, J. P. Brunelle, M. Pijolat, and M. Soustelle, "Influence of Surface Area and Additives on the Thermal Stability of Transition Alumina Catalyst Supports I. Kinetic Data," Appl. Catal. 34, 225-38 (1987).
19. F. W. Dynys and J. W. Halloran, "Alpha Alumina Formation in Alum-Derived Gamma Alumina," J. Am. Ceram. Soc., 65 [9] 442-48 (1982).
20. 3," J. Am. Ceram. Soc., 82 [4] 825-32 (1999).
21. M. Kumagai and G. L. Messing, "Knhanced Densification of Bochmite Sol-Gels by α-Alumina Seeding," J. Am. Ceram. Soc., 67 [11] C-230-C-231 (1984).
22. W. A. Yarbrough and R. Roy, "Microstruclural Evolution in Sintering of AIOOH Gels," J. Mater. Res., 2 [4] 494-515 (1987).
23. 3-Seeded Boehmite-Derived Alumina," J. Am. Ceram. Soc., 76 [1] 214-22 (1993).
24. 3," J. Am. Ceram. Soc., 57 [8] 367-71 (1974).
25. M. Pijolat, M. Dauzut, and M. Soustelle, "Influence of Additives and Water Vapour on the Transformation of Transition Aluminas into Alpha-Alumina," Thermochin. Acta, 122, 71-77 (1987).
26. L. A. Xue and I-W. Chen, "Influence of Additives on the γ-to-α Transformation of Alumina," J. Mater. Sci. Lett., 11, 443-45 (1992).
27. Z. Hrabe, S. Komarneni, L. Pach, and R. Roy, "The Influence of Water Vapor on Thermal Transformations of Bochmite," J. Mater. Res., 7 [2] 444-49 (1992).
28. 3 System," J. Am. Ceram. Soc., 77 [11] 2977-84 (1994).
29. 2 Atmosphere on Transition Aluminas Transformation," J. Mater. Sci., .32 [12] 3299-304 (1997).
30. B. E. Yoldas, "Alumina Sol Preparation from Alkoxides," Am. Ceram. Soc. Bull., 54 [3] 289-90 (1975).
31. B. E. Yoldas, "Hydrolysis of Aluminum Alkoxides and Bayerite Conversion," J. Appl. Chem. Biotechnol., 23, 803-809 (1973).
32. B. K. Warren, X-ray Diffraction; pp. 251-54, Dover, New York, 1990.
33. B. D. Cullity, Elements of X-ray Diffraction, 2nd ed.; pp. 284-85, Addison-Wesley, Reading, MA, 1978.