Optical Characteristics of a Film-Forming Material Based on a Mixture of ZnO with Al2O3 and Dy2O3 Oxides Synthesized in a Solar Furnace
Аннотация
The article presents the results of studying the structural and optical characteristics of films based on a mixture and alloy of ZnO, Al2O3, and Dy2O3 with a weight concentration of the components ZnO—96%, Al2O3—2%, and Dy2O3—1%. The alloy has been obtained by melting a mechanical mixture at the focus of a solar furnace with a concentrator diameter of 2 m. The films have been deposited onto glass plates by the resistive method in a vacuum. X-ray phase analysis showed that the films obtained from the alloy have a higher degree of crystallization than coatings obtained from a mechanical mixture of oxides. Regardless of the method of preparing the film-forming material, the ZnO crystal lattice undergoes strong stretching due to the introduction of Al2O3 and Dy2O3. The lower value of the transmittance coefficient compared to the simulation results is explained by the presence of metallic Zn, i.e., the formation of a Zn + ZnO cermet film. As a result of annealing the film at 400°C, its transmittance increased due to a decrease in the concentration of Zn.