Synthesis And Physicochemical Properties Of An Advanced Bao-Mgo-Al2o3-Sio2 System As An Attractive Protective-Coating Material

One way to increase the turbine efficiency and reduce pollutant emissions would be to work in harsh environments with high temperatures and Corrosion environments. Therefore, it is essential to develop new materials that are able to withstand environmental and mechanical conditions. Such coatings are usually a combination of ceramic layers that can better counteract aggressive environments and protect the substrate. Over many years, many ceramic systems have been developed and studied as thermal and ecological barriers. However, the costs and stability of such materials still require research and improvement to decrease the price of production costs, while maintaining the best protective properties. Barium osumilite (BaMg2Al6Si9O30) has many attractive physical and chemical properties that make it most suitable for high-temperature utilities. The main aim of this article is to present a detailed description of a laboratory preparation of Ba-osumilite, including the multistep solid-state reaction after the mechanical activation by high-energy milling and physicochemical characterization of the resulting material, focusing on the microstructure and thermal properties. The thermal-expansion coefficient and microstructure, monitored in view of the changes to the crystallinity, are observed during the heating up to 1200 degrees C in an Anton Paar HTK 2000 high-temperature chamber.