Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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The Quantification of TiO2 Thickness Using Color Values by Spectrophotometer and Chromameter

분광측색계, 색차계의 색 수치 값을 이용한 타이타늄 산화막의 두께 정량화

  • 이다영 (인하대학교 화학.화학공학 융합학과) ;
  • 한아영 ((주) 영광 YKMC) ;
  • 하동흔 (인하대학교 화학.화학공학 융합학과) ;
  • 유현석 (인하대학교 화학.화학공학 융합학과) ;
  • 김훈식 ((주) 영광 YKMC) ;
  • 정나겸 ((주) 영광 YKMC) ;
  • 장관섭 ((주) 영광 YKMC) ;
  • 최진섭 (인하대학교 화학.화학공학 융합학과)
  • Received : 2018.06.13
  • Accepted : 2018.06.27
  • Published : 2018.06.30
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Abstract

The anodic $TiO_2$ layers which are prepared in various anodization conditions exhibit their specific color depending on the thickness of $TiO_2$. In this study, the relationship between the color of $TiO_2$ layer, which is grown by PEO (Plasma electrolytic oxidation), and the thickness of the $TiO_2$ layer is investigated. To evaluate the color change of the $TiO_2$ layer, the value of color ($dE^*ab$) is measured and calculated by spectrophotometer and chromameter. As a result, it is found that $dE^*ab$ values and thickness of $TiO_2$ layers form a linear relationship with meaningful formular. This formula can be helpful to quantify the thickness of the $TiO_2$ layer by the numerical $dE^*ab$ values. In this process, the spectrophotometer shows more precise results than the chromameter dose. If fluoride ions ($F^-$) are included in the electrolyte, it will affect the $dE^*ab$ values of the $TiO_2$. layer. This is against the propensity, which is analyzed by XRD (X-ray diffraction) and XPS (X-ray photoelectron spectroscopy). It is important that the formular suggested in this study provides other metals which can be also anodized with the possibility of quantifying the thickness of the $TiO_2$ layer by the $dE^*ab$ values.

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References

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