Performance of 99% alumina ceramics

Performance of 99% alumina ceramics
99% alumina ceramic materials have high hardness, high strength, low expansion coefficient, and good insulation, wear resistance, and corrosion resistance. They are widely used in mechanical manufacturing, aerospace, precision instruments, petrochemical and other fields.
Alumina ceramic parts are usually formed by isostatic pressing sintering. Due to the frequent deformation and shrinkage caused by sintering, further precision machining is usually required to ensure the dimensional and shape accuracy of the parts.
However, alumina ceramic materials generally have high elastic modulus, high hardness, and strong brittleness and crack sensitivity. Therefore, the difficulty of processing is mainly reflected in the hardness and brittleness of the processing.
The processing hardness of alumina ceramics: AL203 mainly includes α、β、γ Three crystal morphologies, among which α- The morphology of Al203 crystal is the most stable, with I3 and γ The crystal is almost completely transformed into α Crystals.
stay α- In the crystal form of Al203, the atomic bonds formed by aluminum ions and oxygen ions are mostly covalent bond, ionic bonds or their mixed bonds, so the binding energy between atoms is high and has strong directionality.
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