Comparison of wear resistance between alumina ceramics and zirconia ceramics
There are many kinds of alumina ceramics and zirconia ceramics. So, what are the internal resistance comparison between alumina ceramics and zirconia ceramics? Shenzhen Zirconia Ceramics Manufacturer-Mingtao Metalworking, let me tell you specifically:
1. Natural alumina is corundum with Mohs hardness of 9 and cubic zirconia with Mohs hardness of 8.5. Therefore, in terms of pure alumina and zirconia, the hardness of alumina is higher and it is more wear-resistant.
2. However, alumina ceramics is a mixture. It is artificially blended and then sintered. It is not pure brittle corundum. Therefore, depending on the alumina content of the ceramics, some manufacturers have 95% alumina ceramics, 97% alumina ceramics, 99% alumina, 99.7% alumina ceramics and other ceramics.
Fourth, if the grinding media material working under centrifugal force is preferably zirconia, its monoclinic density is 5.85. The density of alumina is only 3.9-4.0. Therefore, choosing zirconia as the grinding medium will produce greater shear force and improve the grinding efficiency.
5. If it is used as a material for grinding pots or bearings, it is better to choose high-purity alumina ceramics with higher hardness.