| V의 고용이 Malayaite의 결정 및 발색에 미치는 영향 |
| 주인돈, 이병하 |
| 명지대학교 신소재공학과 |
| Effect of V-doping on Colour and Crystallization of Malayaite Pigments |
| In-Don Joo, Byung-Ha Lee |
| Department of Material Science & Engineering, Myongji University |
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| ABSTRACT |
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This study aims to synthesize emerald-green malayaite pigments using $CaCO_3$, $SiO_2$, $SnO_2$ and $V_2O_5$. For this purpose, the optimum composition is $CaV_{0.25}Sn_{0.687}SiO_5$ and heating condition is at $1250^{circ}C$ for 6 h of soaking time. The samples were characterized by X-ray diffraction (XRD), the Fourier Transform Infrared Spectrometers(FT-IR), the Raman Spectrometer, Scanning Electron Microscope(SEM) and the UV/Vis spectroscopy. The substituted V ion for Sn was observed to be quadrivalence. The analytical results of the synthesized pigment showed the tetragonal crystal, a typical form of Malayaite, and the particle size to be approximately $5{sim}10;{mu}m$. The color in lime glaze added 12 wt% pigment was emerald green, and CIE Lab parameters are $L^*=67.73$, $a^*=-12.39$ and $b^*=9.28$. |
| Key words:
Malayaite, Cassiterite, Vanadium oxide, Pigments, Emerald-green |
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