In the vast universe of industrial materials, an ostensibly ordinary ring-shaped object is quietly rewriting the rules of the game. It is not metal, yet harder than metal; not plastic, yet more resistant to high temperatures than plastic; not rubber, yet more corrosion-resistant than rubber. It is the alumina ceramic ring, hailed as the "industrial teeth".

As the "joints" of industrial equipment, bearings rely heavily on the performance of their lining components, which directly determines the operational stability, service life and efficiency of the equipment. Traditional bearing linings are mostly made of metal materials.