Formation mechanism of titania based opacified glaze with novel core-shell nanostructure

Zhan, Hongquan and Wu, Chuanqi and Deng, Ce and Li, Xiaohong and Xie, Zhipeng and Wang, Changan and Chen, Zhi-gang (2019) Formation mechanism of titania based opacified glaze with novel core-shell nanostructure. Journal of the European Ceramic Society, 39 (4). pp. 1668-1674. ISSN 0955-2219


Abstract

The formation mechanism of titania based opacified glaze is discussed in this paper. The glaze system composed of albite, kaolin, talc, calcite, quartz, titanium dioxide and zinc oxide is used to adjust the glaze formula and to obtain the glaze samples with better opacifying effect. The whiteness and glossiness of glaze products formed with different TiO2 contents are characterized by whiteness meter and gloss meter respectively. The structure of glaze layer is analyzed by means of SEM, TEM and EDS. The results show that the introducing of TiO2 can promote the phase separation and forms the special Si-rich/Ti-rich core-shell nanostructure. During the cooling process of the glaze, the liquid-liquid phase separation occurs and results in the formation of uniform Si-rich nanoparticles. While the Ti-containing components are enriched at the interface between the different phases and a special spherical core-shell structure is obtained around the Si-rich nanoparticles. The glaze layer is filled with the core-shell nanospheres and shows a network structure like opal. However, due to the decrease of cationic content (Ti, Zn, Ca, and Mg) in the interface between glaze and body, the network nanostructure like reverse opal would be formed. In the interaction of special opal and reverse opal structure, the opacifying effect is enhanced obviously.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 25 Jun 2019 02:47
Last Modified: 06 Mar 2020 04:31
Uncontrolled Keywords: opacification; phase separation; core/shell nanostructure; titania
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Funding Details:
Identification Number or DOI: 10.1016/j.jeurceramsoc.2018.12.013
URI: http://eprints.usq.edu.au/id/eprint/36049

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