Semitransparent Decorative Coatings Based on Optical Interference of Metallic and Dielectric Thin Films for High Temperature Applications

Abstract

This paper introduces a thin film multilayer structure composed of dielectric and metallic layers that allows for a wide range of aesthetic appearances using the phenomenon of optical interference. In addition, this multilayer structure allows the reflection and transmission coefficients to be controlled independently. The application of these decorative coatings to induction stoves is also studied. The aim is to provide an attractive aesthetic appearance for the transparent glass-ceramic, and allow the visualization of blue and white lighting systems. Moreover, degradation of these decorative coatings is studied at high temperatures, so as to ensure that the coating does not change its aesthetic appearance during normal operation of the stove. It has been found to be necessary to use dielectric materials with low diffusion coefficients of oxygen, or not containing oxygen, to prevent oxidation of the metal layers when subjecting the coating to high temperatures.

Germanium-Based Optical Coatings for Aesthetic Enhancement with Low Radiofrequency Attenuation

“…Consequently, the sum of the transmittance and reflectance values equals one for all wavelengths. However, when the goal is to develop coatings with optical absorption, Nanomaterials 2024, 14, 530 2 of 13 aiming to achieve relatively independent transmittance and reflectance, the use of materials with optical absorption is necessary [23,24]. In other words, these are materials with an imaginary component in their refractive index.…”