| Al-doped Uvarovite 안료의 합성과 특성 |
| 서성규, 이병하 |
| 명지대학교 신소재공학과 |
| Synthesis and Characterization of Al-doped Uvarovite Green Pigments |
| Sung-Gyu Seo, Byung-Ha Lee |
| Department of Materials Science & Engineering, Myongji University |
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| ABSTRACT |
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Uvarovite Garnet is green pigment prepared by using $Cr_2O_3$, CaO and $SiO_2$ which are widely used in ceramic industry. The synthesis of above pigment was carried out by mixing $K_2Cr_2O_7$, $SiO_2$ and $CaCO_3$ as formulated and then firing at $1000{sim}1200^{circ}C$. To investigate the optimum synthesis condition of the Uvarovite Garnet. it was prepared by using CaO to replace $CaCO_3$, $CaF_2$ and $CaCl_2$. To get green brighter color, $Al^{3+}$ was substituted for $Cr^{3+}$. They were characterized by X-ray diffraction, UV-Vis spectroscopy, Raman spectroscopy and SEM analysis. When the pigments were applied to lime glazes (6 wt%), color parameters of Uvarovite Garnet showed the $L^*$=40.99, $a^*$=-16.23 and $b^*$=17.04. |
| Key words:
Uvarovite, Green, Pigments, Garnet |
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