Submicro-zirconia crystal-intergrown zircon opaque glaze |
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| Affiliation: | 1. School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, Guangdong, China;2. Foshan Daqian Ceramic Pigment & Glaze Co. Ltd., Foshan, 528000, Guangdong, China;1. Laboratoire Matériaux Procédés Environnement Qualité, LMPEQ, Université Cadi Ayyad - ENSA de Safi, Route Sidi Bouzid, BP 63 - 46000 Safi, Morocco;2. Science des Procédés Céramiques et de Traitements de Surface, SPCTS, UMR CNRS 7315, Centre Européen de la Céramique – ENSCI, 12 rue Atlantis, 87068 Limoges Cedex, France;3. Laboratoire de la Matière Condensée et de l’Environnement, LMACE, Université Cadi Ayyad - FSSM, Avenue My Abdellah, BP 2390 – 40000 Marrakech, Morocco;1. AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Ceramics and Refractory Materials, Poland;2. AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Silicate Chemistry and Macromolecular Compounds, Poland;1. School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, 333001, PR China;2. State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, PR China;3. Materials Engineering, The University of Queensland Brisbane, St Lucia, QLD 4072, Australia |
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| Abstract: | Zircon opaque glaze is widely used in sanitary and building ceramic products due to its high-temperature stability. Massive amounts of zircon are consumed by the ceramic industry yearly. In this work, a method to reduce zircon consumption and enhance opaque effect was proposed by intergrowth of submicro zirconia. Alumina was added to a K–Na–Ca–Al–Si–Zr system glaze to prepare a 5 wt % content highly opaque glaze, where zirconia coexisted with zircon. The crystallization behavior, opacification properties, and Vickers hardness of the glaze were investigated. Back-scattered electron images showed that when Al2O3 addition increased into more than 13 wt %, abundant of submicro zirconia crystals would intergrow with zircon crystals. The glaze containing 13 wt % Al2O3 had an L* value of 96.76 ± 0.27 after being fired at 1220 ℃. |
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| Keywords: | Opaque glaze Intergrown crystal Zirconia Crystallization |
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