New route for the extraction of crude zirconia from Zircon
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Welham, N.J. (2002) New route for the extraction of crude zirconia from Zircon. Journal of the American Ceramic Society, 85 (9). pp. 2217-2221.
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Abstract
A commercial grade of zircon (ZrSiO4) concentrate was mechanically milled with MgO for up to 100 h in a laboratory-scale mill. The resultant powders were subjected to thermal processing, chemical leaching, and X-ray diffraction (XRD). There was no direct evidence of reaction during the milling step, with no new phases evident from XRD. Leaching of the powder showed that a reaction had occurred, and increased solubility with milling time was attributed to the formation of a nanostructured Mg-Zr-Si oxide, which dissolved congruently. Heating the powders resulted in a number of thermal events, including the formation/crystallization of ZrO2 and Mg2SiO4. Thermal treatment of the milled powders allowed selective chemical leaching of the magnesium and silicon, leaving a powder containing ∼90% ZrO2.
| Item Type: | Journal Article |
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| Publisher: | Wiley |
| URI: | http://researchrepository.murdoch.edu.au/id/eprint/34303 |
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