The Self-Catalytic Role of Zirconium N-Propoxide in Sol-Gel Syntheses of ZrO₂/Y₂O₃-CeO₂ Compound Powders

Abstract:

The self-catalytic role of zirconium n-propoxide has been investigated with respect to the synthetic parameters of ZrO₂/Y₂O₃-CeO₂ compound powders. When zirconium n-propoxide is prehydrolyzed, the gelation time is prolonged, resulting in a more transparent gel. It is found that gelation time can be shortened with a high concentration of tetraethoxysilane in the presence of a small amount of zirconium n-propoxide. On the basis of the synthetic data, a mechanism for the zirconium n-propoxide catalytic reactions has been discussed. A linear correlation between the mixing level and metal content holds up to 45 mol% of ZrO₂/Y₂O₃ under the studied conditions.

• Periodical: Advanced Materials Research (Volumes 230-232)
• Pages: 1278-1281
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.230-232.1278
• Online since: May 2011
• Authors: Zhong Zhou Yi, Bo Wang, Feng Rui Zhai, Zhi Peng Xie
• Keywords: Hydrolysis, Synthesis, Tetraethoxysilane, Zirconium N-Propoxide, ZrO₂/Y₂O₃-CeO₂

References

[1] G. Brusatin, M. Guglielmi, P. Innocenzi, A. Martucci,G. Battaglin, S. Pelli and G. Righini, J. Non-Cryst. Solids, 1997, 220, 202.

DOI: 10.1016/s0022-3093(97)00263-9

[2] C. Sanchez and M. In, J. Non-Cryst. Solids, 1992, 147-148.

[3] H. C. Zeng and M. Qian, J. Mater. Chem., 1996, 6, 435.

[4] U. Wellbrock, W. Beier and G. H. Frischat, J. Non-Cryst. Solids, 1992, 147-148.

[5] J. B. Miller and E. I. Ko, Catal. Today, 1997, 35, 269.

[6] A. Fontana, E. Moser, F. Rossi and R. Campostrini, J. Non-Cryst. Solids, 1997, 212, 292.

[7] F. Garbassi, L. Balducci and R. Ungarelli, J. Non-Cryst. Solids, 1998, 223, 190.

[8] Zhaoqi Zhan , Hua C. Zeng, J. Mater. Chem., 1999, 9, 2647-2652.