Effect of ZnO/MgO ratio on the crystallization and optical properties of spinel opaque glazes |
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| Authors: | Jingpei Cai Ming Lu Kang Guan Weixiong Li Fan He Peng Chen Cheng Peng Pinggen Rao Jianqing Wu |
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| Affiliation: | School of Materials Science and Engineering, South China University of Technology, Guangzhou, China |
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| Abstract: | The effect of the ZnO/MgO ratio on the crystallization and optical properties of glass‐ceramic glazes from the SiO2–Al2O3–ZnO–MgO–CaO–K2O–Na2O–B2O3 system was studied. The glazes with different ZnO/MgO ratios were characterized by differential scanning calorimetry, X‐ray powder diffraction, Raman spectroscopy, scanning electron microscopy, energy dispersive spectroscopy analysis and a spectrophotometer. The results reveal that the A glaze without ZnO content contains forsterite and sapphirine. The B and C glazes with intermediate ZnO/MgO ratio contain enstatite and spinel solid solution. The D to F glazes with higher ZnO/MgO ratio crystallize spinel solid solution as the only crystalline phase. The amount of spinel solid solution, lightness values (L*), gloss values and the reflectance of the studied glazes increase with the ZnO/MgO ratio. |
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| Keywords: | crystallization glass‐ceramic opaque glazes optical properties spinel |
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