Gamma-Alumina Synthesis from Ceramic Powders of Pseudoboehmite Obtained by the Sol-Gel Process

Raphael Cons Andrades; Antônio Hortêncio Munhoz Jr.; Leila Figueiredo de Miranda

doi:10.4028/www.scientific.net/MSF.881.12

Paper Titles

Preface, Committees, Sponsors

Synthesis and Characterization of LaCr_1-xSn_xO₃ Nanopowders (x = 0 and 0.1)
p.3

Optical and Structural Properties of Lanthanum Chromite Synthesized by Microwave Assisted Self-Combustion Method
p.7

Gamma-Alumina Synthesis from Ceramic Powders of Pseudoboehmite Obtained by the Sol-Gel Process
p.12

Effect of Iron and Vanadium on the Phase Transition of Titanium Dioxide Obtained by Polymeric Precursor Method
p.18

Microwave Irradiation Applied to Calcination and Sintering of Strontium Titanate Ceramics
p.24

Synthesis and Characterization of CaMgSi₂O₆ Activated by Eu²⁺
p.30

Synthesis and Characterization of Co/SBA-15 Catalysts
p.35

Synthesis and Characterization of MgO/MCM-22 as Catalytic Support Using the Impregnation Technique
p.41

HomeMaterials Science ForumMaterials Science Forum Vol. 881Gamma-Alumina Synthesis from Ceramic Powders of...

Gamma-Alumina Synthesis from Ceramic Powders of Pseudoboehmite Obtained by the Sol-Gel Process

Abstract:

The aim of this work was to synthesize eight samples of pseudoboehmite obtained by the sol-gel process under different conditions in a two level factorial experimental design consisting of three variables. It was observed how the properties of pseudoboehmites (crystallinity and morphology) were affected by the three analyzed variables, namely: aging temperature, aging time and addition of polyvinyl alcohol. The samples were characterized by x-ray diffraction, scanning electron microscopy with secondary electrons detector, differential thermal analysis, and thermogravimetric analysis. After being characterized, the pseudoboehmite powders were calcined in an electric furnace at 500°C. After calcination, the resultant powders were analyzed via x-ray diffraction. One of the most important results achieved in this work was the successful synthesis of gamma-alumina from pseudoboehmite, as well as high crystallinity in the pseudoboehmite samples aged at high temperatures.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volume 881)

Pages:

12-17

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.881.12

Citation:

Cite this paper

Online since:

November 2016

Authors:

Raphael Cons Andrades, Antônio Hortêncio Munhoz Jr., Leila Figueiredo de Miranda

Keywords:

Factorial Experimental Design, Gamma Alumina, Pseudoboehmite, Sol-Gel Process

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] O.P. Krivoruchko, R. Buyanov: Russian Journal of Inorganic Chemistry Vol. 23 (1978), p.988.

Google Scholar

[2] J.T. Kloprogge, L.V. Duong, B.J. Wood, R.L. Frost: Journal of Colloids and Interface Science Vol. 296 (2006), p.572.

Google Scholar

[3] I. Levin, D. Brandon: Journal of the American Ceramic Society: Vol. 81 (1998), p. (1995).

Google Scholar

[4] A.C. Vieria Coelho, G.A. Rocha, P. Souza Santos, H. Souza Santos, P.K. Kiyohara: Matéria: Vol. 13 (2008), p.329.

DOI: 10.1590/s1517-70762008000200011

Google Scholar

[5] P.K. Rao, C. Sivaraj, G.K. Reddy, V.V. Rao, V.M. Mastikhin: Solid State Nuclear Magnetic Resonance Vol. 3 (1994), p.39.

DOI: 10.1016/0926-2040(94)90050-7

Google Scholar

[6] T.F. Baumman, A.E. Gash, S.C. Chinn, A.M. Sawvel R.S. Maxwell, J.H. Satcher Jr: Chemistry of Materials Vol. 17 (2005), p.395.

Google Scholar

[7] M Crişan, M. Zaharescu, V. D. Kumari, M. Subrahmanyam, D. Crişan, N. Drăgan: Applied Surface Science: Vol. 258 (2011), p.448.

DOI: 10.1016/j.apsusc.2011.08.104

Google Scholar

[8] M.N. RAHAMAN: Ceramic Processing and Engineering. (Taylor & Francis second ed. New York, 2003).

Google Scholar

[9] J.B. Blum, S.R. Gurkovich: Journal of Materials Science Vol. 20 (1985), p.4479.

Google Scholar

[10] L. L. Hench, J. K. West: Chemical Reviews Vol. 90 (1990), p.33.

Google Scholar

[11] A.H. Munhoz Jr, M.V.S. Martins, K. Cruz, A.R. Zandonadi, L.F. Miranda: Materials Science Forum Vol. 727 (2012), p.1795.

DOI: 10.4028/www.scientific.net/msf.727-728.1795

Google Scholar

[12] E.M. Moroz, K. Shefer, D.A. Zyuzin, A.S. Ivanova, E.V. Kulko, V.V. Goidin, V.V. Molchanov: Kinetics and Catalytic Letters Vol. 87 (2006), p.367.

DOI: 10.1007/s11144-006-0045-z

Google Scholar

[13] A. Boumaza, L. Favaro, J. Lédion, G. Sattonay, J.B. Brubach, P. Berthet, A.M. Huntz, P. Roy, R. Tétot: Journal of Solid State Chemistry Vol. 182 (2009), p.1171.

DOI: 10.1016/j.jssc.2009.02.006

Google Scholar