Hydrothermal Synthesis of Nanosized Mullite Powders

Xiao Lin Jia; Su Ping Li; Hai Jun Zhang; Jiang Tao Zhu; He Long Hu

doi:10.4028/www.scientific.net/KEM.368-372.806

Paper Titles

Preparation of Silicon Dioxide Fiber via Sol-Gel Process
p.794

Synthesis of Core@Shell Composites with Gold Nanoparticles Trapped inside Ceramic Silica Shells by the Sol-Gel Method
p.797

Effect of Heat Treatment on the Microstructure of TiO₂ Nanofibers Prepared by Refluxing in Basic Solution
p.800

Synthesis of Mullite Nanocomposite from Natural Kaolin
p.803

Hydrothermal Synthesis of Nanosized Mullite Powders
p.806

Preparation and Structure Characterization of Mullite Fiber Porous Ceramic
p.809

Catalyst-Free Synthesis of Mullite Nanosticks
p.812

Microstructure and Mechanical Properties of Mullite Composites via Pressure Molding and by Oxidation of an Al-Si Alloy Powder
p.815

A Novel SiC Precursor with High Ceramic Yield: Antimony-Substituted Polysilane (APS)
p.818

HomeKey Engineering MaterialsKey Engineering Materials Vols. 368-372Hydrothermal Synthesis of Nanosized Mullite...

Hydrothermal Synthesis of Nanosized Mullite Powders

Abstract:

Nanosized mullite powders were prepared by hydrothermal method with bauxite as precursor. The effects of mineralizer, hydrothermal temperature, hydrothermal time, dispersant on the phase, crystal size and secondary granularity of the powders were discussed. The properties of the prepared powders were characterized by XRD, SEM, and ZETASIZER. The results show that the spherical nanosized mullite powders with crystal size of 28nm are prepared under the conditions of 0.92 mol·L-1 concentration of NaOH, less than 85% filling ratio, 110°C for 6 h with bauxite calcined at 1040°C as starting material.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Pages:

806-808

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.368-372.806

Citation:

Cite this paper

Online since:

February 2008

Authors:

Xiao Lin Jia, Su Ping Li, Hai Jun Zhang, Jiang Tao Zhu, He Long Hu

Keywords:

Bauxite, Hydrothermal Method, Nanosized Mullite Powders

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] P. Liu: Geological Science and Technology Information. Vol. 17 [2](1998), p.18.

Google Scholar

[2] C.S. Du: Bull. Chin. Ceram. Soc. Vol. 17 [2](1998), p.57.

Google Scholar

[3] X.H. Jin, L. Gao and J.K. Guo: J. Inorg. Mater. Vol. 16 (2001), p.555.

Google Scholar

[4] P. Murugavel, M. Kalaiselvam, M.K. Renganathan, et al. Mater. Chem. Phys. Vol. 53 (1998), p.247.

Google Scholar

[5] L. Saadi, R. Moussa, A. Samdi, et al: J. European Ceram. Soc. Vol. 19 (1999), p.517.

Google Scholar

[6] Y.Y. Wang, Zh. Ma and Y.N. Qin: Chin. J. Chem. Phys. Vol. 14[2] (2001), p.216.

Google Scholar

[7] Q.Z. Cong: Polycrystal Two-Dimension X-xay Diffraction (Science Press, Beijing, 1997).

Google Scholar

[10] 20 30 40 50 60 70 8h 6h 4h △ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲ - mullite ■ - corundum 2Theta/degree ■ ■ ■ ■ ■ ■ ■ ■ ▲ △△ △ △ - sodium silicoaluminate 0. 16 0. 18 0. 20 0. 22 0. 24 0. 26 0. 28 0. 30.

Google Scholar

[3] 4 5 6 7 8 9.

Google Scholar

[5] [10] [15] [20] [25] [30] [35] [40] secondary grain size/μ m crystal size/nm hydrothermal time/ h Fig. 5 XRD patterns of samples prepared at different times Fig. 6 Crystal sizes and secondary grain sizes of powders prepared at different times 0. 12 0. 16 0. 20 0. 24 0. 28.

Google Scholar

0. 2 1 2.

Google Scholar

[5] [10] [15] [20] [25] [30] [35] secondary grain size/μ m crystal size/nm mineralizer concentration / wt% Fig. 7 Crystal sizes and secondary grain size of powders vs. mineralizer concentration Fig. 8 SEM micrograph of nano-mullite particles.

Google Scholar