Silicon nitride balls are used in high-speed rotating complete ceramic and hybrid-ceramic bearings. For the record, the density of silicon nitride is less than half that of steel, which aids in reducing centrifugal force during bearing rotation and allowing for quicker operating speeds. Furthermore, the compound has a boatload of excellent properties that were specifically planned and manufactured for a range of medicinal purposes. According to reports, silicon nitride offers exceptional mechanical properties such as high strength.