분광측색계, 색차계의 색 수치 값을 이용한 타이타늄 산화막의 두께 정량화

초록

The anodic TiO2 layers which are prepared in various anodization conditions exhibit their specific color depending on the thickness of TiO2. In this study, the relationship between the color of TiO2 layer, which is grown by PEO (Plasma electrolytic oxidation), and the thickness of the TiO2 layer is investigated. To evaluate the color change of the TiO2 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 TiO2 layers form a linear relationship with meaningful formular. This formula can be helpful to quantify the thickness of the TiO2 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 TiO2. 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 to the possibility of quantifying the thickness of the TiO2 layer by the dE*ab values.

키워드