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Journal of the Korean Ceramic Society 1993;30(3): 222. |
| 금속티타늄 분말로부터 고순도 $TiO_2$ 미분말 합성 |
| 조태환, 송기세, 이용민1, 송종택1 |
단국대학교 공업화학과
1단국대학교 재료공학과 |
| Synthesis of High purity $TiO_2$ Powder from Elemental Titanium Particles |
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| ABSTRACT |
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In order to obtian TiO2 fine powder of high purity, the new method which is different from the sulfate process and the chloride one was employed. TiO2 was syntehsized by the reaction between elemental titanium particles and H2O2 solutiosn at 30~7$0^{circ}C$, and then TiO2 powder was characterized using XRD, SEM, TEM, DTA and FT-IR. It was found that the initial reaction rate was fast at a high temperature due to the high generation of activated oxygen associated with thedecomposition of H2O2. However, the reaction was slowly proceeded at a low temperature due to slow decomposition of H2O2. In this experimental range, the optimum temeprature was ocnsidered to be about 5$0^{circ}C$. The primary particles of the hydrous titanium dioxide (TiO2 gel) before aging were spherical, and their mean sizes were about 50nm. The similar shapes and sizes were observed with calcinatin at 40$0^{circ}C$. The FT-IR spectrum of Ti-OH in the TiO2 gel powder appeared at around 3380cm-1, 1630cm-1 and 530cm-1. This gel powder was crystallized into the anatase type TiO2 at 300~40$0^{circ}C$. |
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