Profile: Xiamen Unipretec Ceramic Technology Co. Ltd. offers ceramics precision components and products. Aluminum Oxide, also known as alumina, is a hard wearing advanced technical ceramic material frequently used in a wide variety of industrial applications. Once fired and sintered, it can only be machined using diamond-grinding methods. It features high hardness and wear resistance, low erosion levels, high temperature resistance, corrosion resistance, and bioinertness. Additionally, it can be highly polished, making it useful for a wide range of applications. Frequently used alumina's purity is from 90% to 99.7%.