Photoluminescent Coatings on Zinc Alloy Prepared by Plasma Electrolytic Oxidation in Aluminate Electrolyte

Thick ZnO/ZnAl2O4 coatings were synthesized on zinc alloy Z1 substrates through plasma electrolytic oxidation (PEO) for different anodization times. The prepared characterized by scanning SEM, XRD, diffuse reflectance and photoluminescence spectroscopy in order to establish the relationship between their structural optical properties PEO processing parameters. Under conditions (anodization time—1–10 min applied voltage—370 450 V) ceramic with a mean thickness of 2–12 μm prepared. XRD analysis explored coating structure composed oxide (wurtzite) aluminate spinel. content ZnAl2O4 grows increasing voltage time. Photoluminescence (PL) measurements showed that have several bands visible near-infrared regions associated composite structure. PL spectra significantly depend parameters due varying ZnO coatings. insight photoluminescent has been provided using combination luminescence spectroscopy.