Effects of Solvents on Synthesis and Dispersion of Zircon Powder via Non-Hydrolytic Sol-Gel Route

Jiang, Wei Hui; Liu, Jian Min; Zhu, Qing Xia; Cheng, Si

Paper Titles

Influence of the Dispersant on the Bead Milling of Alumina, p.36
Synthesis and Surface Characterization of a Silica White Prepared from High Si:Al Fine Powder, p.40
Extraordinary Adsorption Properties of Nano Porous Hydrophobic Silica Aerogels, p.45
Preparation of Mullite Nanocomposites Powders by the Hydrothermal Crystallization Method from Coal Gangue, p.49
Effects of Solvents on Synthesis and Dispersion of Zircon Powder via Non-Hydrolytic Sol-Gel Route, p.54
Preparation of Rare-Earth Doped Zirconia Nanoparticles via Supercritical Hydrothermal Method for Luminescence Properties, p.59
Fabrication of Graphene/Zirconia Nanocomposite by Mixing Graphite Oxide and Zirconia Nanopowders and Pressureless Sintering, p.65
Study on Properties of Slurry for Making Zirconia Fiber, p.69
Synthesis of Amorphous Al₂O₃-ZrO₂ Powders Prepared by Citric Acid Gel Process, p.73

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Paper Title:

Effects of Solvents on Synthesis and Dispersion of Zircon Powder via Non-Hydrolytic Sol-Gel Route

Periodical	Key Engineering Materials (Volumes 512 - 515)
Main Theme	High-Performance Ceramics VII
Edited by	Wei Pan and Jianghong Gong
Pages	54-58
DOI	10.4028/www.scientific.net/KEM.512-515.54
Citation	Wei Hui Jiang et al., 2012, Key Engineering Materials, 512-515, 54
Online since	June, 2012
Authors	Wei Hui Jiang, Si Cheng, Qing Xia Zhu, Jian Min Liu
Keywords	Dispersion, Low Temperature Synthesis, Non-Hydrolytic Sol-Gel, Solvent, Zircon
Price	US$ 28,-

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Abstract

Zircon nano–powder has been synthesized via the non-hydrolytic sol–gel route, using industral zirconium tetrachloride (ZrCl₄) and tetraethoxysilane (TEOS) as precursors, lithium fluoride (LiF) as mineralizer, PEG1000 as dispersant. The effects of solvents on the synthesis and dispersion of zircon nano-powder were investigated by means of XRD and TEM. The results indicate that the aprotic solvent N, N-dimethyl formamide (DMF) is not conducive to the nucleophilic substitution reaction, which directly affect the zircon synthesis, and the particles are easy to agglomerate due to the large surface tension; the powder with size of 30nm and good dispersion can be obtained using dichloromethane (CH₂Cl₂) as solvent; different anhydrous alcohols as solvents influence zircon synthesis, the order of the synthesis ratio is listed as EtOH›propanol (PrOH)› isopropanol (PrⁱOH). Powder particles are larger than 50nm with wide distribution and serious agglomeration when taking PrOH and PrⁱOH as solvents. Nano-zircon with good dispersion and synthesis ratio up to 94.5% can be obtained via using ethanol as solvent.