Alumina is widely used, and it is no exaggeration to describe it as "alumina is everywhere". Due to the advancement of preparation technology, alumina has obtained various morphologies, such as spherical, hexagonal sheet, cube, cylinder, fiber, flower, curl, etc.
Since the structure of the material determines the properties, and the properties determine the application, and the morphology of the nanomaterial is a part of the structure, the morphology of the nano-alumina has a great influence on its properties and application range. The shape of nano-alumina that is most familiar to everyone is the two- and three-dimensional shapes such as spherical and flake, but when it comes to nano-alumina, everyone may be relatively unfamiliar. Nano-alumina mainly includes fibrous and rod-shaped nano-alumina.
The specific details will be understood below. Fibrous alumina fibers are an important type of high-performance inorganic fibers. The main component is Al203, and some also contain metal oxides such as SiO2 and B203. It has the advantages of high strength, extraordinary heat resistance and high temperature oxidation resistance, and can maintain good tensile strength at higher temperatures. The long-term use temperature is between 1450-1600 °C; and because of its good surface activity, it is easy to It is compounded with resin, metal and ceramic matrix to form many composite materials with excellent performance and wide application, which is considered to be the most potential high-temperature material.
