Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Zirconia-Alumina Composite Coating Materials for Low Temperature Process

저온 공정용 지르코니아-알루미나 복합 코팅제 연구

  • Choi, Jongwan (Department of Chemistry and Life Science, Sahmyook University)
  • 최종완 (삼육대학교 화학생명과학과)
  • Received : 2021.11.30
  • Accepted : 2021.12.23
  • Published : 2021.12.30
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Abstract

In this study, we have studied synthesis of zirconia-alumina composite coating materials via a low-temperature sol-gel process. The zirconia-alumina composites were prepared by coating zirconia precursor, alumina precursor, and organosilane mixture on a polyethylene terephthalate substrate through three steps: sol-gel process, low-temperature photocuring process, and heat treatment process. The structural properties and element analysis of the composites were confirmed by FT-IR and XPS. The coated composite showed a transmittance of 96% or more in the visible light region with a wavelength of 420 nm or more and pencil hardness of 9H or more. In case of the composite of the molar ratio of zirconia and alumina of 1:4, the highest nanoindentation hardness was measured with 1.212 GPa.

지르코니아 복합체는 지르코니아 전구체, 알루미나 전구체, 그리고 유기 실란의 혼합물을 플라스틱 기판 위에 코팅하여 졸 겔 공정과 저온의 광경화 과정, 그리고 열처리 공정 등 세 단계를 거쳐 합성하였고, FT-IR과 XPS 분석을 통하여 지르코니아 전구체와 알루미나 전구체의 비율에 따라 합성된 복합체내 Zr 원소와 Al 원소 비율이 일치함을 확인하였다. 코팅된 복합체는 파장이 420 nm 이상인 가시광선 영역에서 96 % 이상의 투과도를 보였고, 기계적 강도는 연필 강도 9H 이상을 나타내었다. 특히 지르코니아와 알루미나의 몰 비가 1:4의 비율의 복합 코팅제의 나노 압입 경도가 1.212 GPa로 가장 높은 것으로 확인되었다.

Keywords

Acknowledgement

이 성과는 2020년 정부 (과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임. (NRF-2020R1F1A1076752)

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