A critical role of pH in the colloidal synthesis and phase transformation of nano size α-Al2O3 with high surface area

Journal of the European Ceramic Society

Volumn 23, Issue 5, 2003, Pages 659-666

  Sharma, Pramod K ^a   Varadan, V V ^a   Varadan, V K ^a  

^a PENNSYLVANIA STATE UNIVERSITY   (United States)

Author keywords

Al2O3; Powders chemical preparation; Seeding; Sol gel methods

Indexed keywords

NANOSTRUCTURED MATERIALS; PH EFFECTS; PHASE TRANSITIONS; SYNTHESIS (CHEMICAL); TRANSMISSION ELECTRON MICROSCOPY; X RAY DIFFRACTION ANALYSIS;

ISOELECTRIC POINT;

ALUMINA;

ALUMINUM OXIDE; COLLOID; GEL; PH; PHASE CHANGE; POWDER;

EID: 0037383905     PISSN: 09552219     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0955-2219(02)00191-7     Document Type: Article

References (18)

1. Levin,I. and Brandon, D., Metastable Al2O3 polymorph: Crystal structure and transition sequences. J. Am. Ceram. Soc.,1998, 81, 1995-2012.
2. Lippins,B. C. and DeBoer,J. H., Study of phase transformation during calcinations of aluminum hydroxides by selected area electron diffraction. Acta Crystallogr.,1964, 17,1312-1321.
3. 3 seeding. J. Am. Ceram. Soc.,1985, 68, 500-505 .
4. 3 particles synthesized in 1,4 -Butanediol solution by α-Al2O3 and a-Hematite seeding. J. Am. Ceram. Soc.,1998, 81,1411-1420.
5. Gouvea,D., Villalobos, R. L. and Capocci, J. D. T., Polymeric precursor synthesis of alumina containing manganese oxide. Adv. Powder Technol., 1999, 299,91-96.
6. 3 from seeded aluminum hydroxide. J. Am. Ceram. Soc.,1998, 81,2732-27 34.
7. 3 sol preparation from alkoxides. Am. Cer. Soc. Bull., 1975, 54,289-290.
8. 3. Am. Cer. Soc. Bull., 1975, 54, 286-288 .
9. 3 using aluminum tri-sec-butoxide-2,4Pentanedione-2propanol-nitric acid precursors. Chem Mater.,2000, 12, 931-939.
10. Brinker,C. J. and Scherrer,G. W., Sol-gel Science: The physics and Chemistry of Sol-gel Processing. Academic Press Inc,New York,1990.
11. Sharma,P. K., Jilavi, M. H., Varadan,V. K. and Schmidt,H., Influence of initial pH on the particle size and fluorescence properties of the nano scale Eu (III) doped yttria. J. Phys. Chem. Sol., 2002, 63,171-177 .
12. Rao,G. V. R.,Venkadesan , S. and Saraswati, V.,Surface area and pore size studies of alumina gels. J. Non-Cryst. Solids,1989, 111,103-112.
13. Sharma, P. K.,Jilavi, M. H.,Nass, R. and Schmidt,H. K., Tailoring the particle size from microns to nanometer scale by using a surface modifier and theier size effect on the fluorescence properties of europium doped yttria. J. Lum.,1999, 82,187-193 .
14. 3 synthesized by sonohydrolysis of alkoxide precursor in the presence of organics acids: Structure and Morphological properties. J. Am. Ceram. Soc.,2000, 83,89- 94.
15. 3. J. Am. Ceram. Soc.,2001, 84,485-491 .
16. 3 catalyst supports. J. Am. Ceram. Soc.,1998, 81,2709-2712.
17. Keefer,K. D.,Silicon-b ased polymer science; a comprehensive resource. In Am. Chem. Soc,ed. J. M. Zeigler and F. W. Gordon. Washington DC,1990,pp. 228.
18. Sharma,P. K., Fishcer, H and Craievich,A. F., Chemical and structural properties of nickel hydroxide xerogels obtained by the sol-gel procedure in the presence of acetic acid. J. Am. Ceram. Soc.,1999, 82,1020-10 24.