| 저온균일침전법으로 제조된 루틸상 TiO2분말의 분산 안정성 |
| 배현숙, 박순동, 김흥희, 이창규, 김선재1 |
한국원자력연구소 원자력기술개발팀
1세종대학교 신소재공학과 |
| Dispersion Stability of Rutile TiO2Powder Obtained by Homogeneous Precipitation Process at Low Temperature |
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| ABSTRACT |
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Dispersion stability of nano-sized rutile TiO$_2$powder with acicular typed primary particle produced by homogeneous precipitation process at low temperatures was studied in aqueous and non-aqueous media in the presence of various electrolytes. The zeta potential measurements have shown that the addition of electrolytes to aqueous and non-aqueous dispersion media leads to charge reversal on TiO$_2$particle surface. The electrostatic repulsive forces acting on between TiO$_2$particles dispersed in non-aqueous media were found to be significantly greater than that in aqueous media, which relate closely to the physical properties of the organic solvents, such as viscosities and dielectric constants. The pH values, the concentration of electrolytes and the valence of the ions have changed greatly the surface potential of TiO$_2$ particles and have governed the dispersion behavior of TiO$_2$particles virtually. |
| Key words:
$TiO_2$, Dispersion stability, Zeta potential, Critical coagulation concentration |
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