Nanosized rutile titanium dioxide (TiO2) is used in inorganic pigments and cosmetics because of its high whiteness and duality. The high quality of the white pigments depends on their surface coating technique via the solgel process. SiO2 coatings are required to improve the dispersibility, UV-blocking, and whiteness of TiO2. Tetraethyl orthosilicate (TEOS) is an important coating precursor owing to its ability to control various thicknesses and densities. In addition, we use Na2SiO3 (sodium silicate) as a precursor because of its low cost. Compared to TEOS, which controls the pH using a basic catalyst, Na2SiO3 controls the pH using an acid catalyst, giving a uniform coating. The coating thickness of TiO2 is controlled using a surface modifier, cetrimonium bromide, which is used in various applications. The shape and thickness of the nanosized coating layer on TiO2 are analyzed using transmission electron microscopy, and the SiO2 nanoparticle behavior in terms of the before-and-after size distribution is measured using a particle size analyzer. The color measurements of the SiO2 pigment are performed using UV-visible spectroscopy.

Abstract
1. 서 론
2. 실험 방법
    2.1. Tetra ethyl ortho silicate(TEOS)이용 SiO2코팅
    2.2. Sodium metasilicate(Na2SiO3)이용 SiO
    2.3. 특성 분석
3. 결과 및 고찰
    3.1. Tetra ethyl ortho silicate(TEOS)이용 SiO2 코팅
    3.2. Sodium metasilicate(Na2SiO3)이용 SiO2 코팅
4. 결 론
감사의 글
References

• 박민솔(한국세라믹기술원 엔지니어링소재센터, 연세대학교 신소재공학과) | Minsol Park (Engineering Materials Center; Korea Institute of Ceramic Engineering & Technology, Department of Materials Science & Engineering, Yonsei University)
• 심우영(연세대학교 신소재공학과) | Wooyoung Shim (Department of Materials Science & Engineering, Yonsei University, Seoul, Republic of Korea)
• 김유진(한국세라믹기술원 엔지니어링소재센터) | YooJin Kim (Engineering Materials Center; Korea Institute of Ceramic Engineering & Technology, Icheon, Republic of Korea) Corresponding Author