Cobalt (II, III) oxide is an inorganic compound with the chemical formula Co₃O₄. It is a black antiferromagnetic solid and commercial ceramic grades of cobalt oxide will often produce glaze specking. Cobalt oxide powder is typically insoluble in aqueous solutions (water) and extremely stable. Because of its stability, it is useful in ceramic structures such as simple as producing clay bowls to advanced electronics and in lightweight structural components in aerospace and electrochemical applications, for instance, fuel cells in which they manifest ionic conductivity.

This powder is utilized in lithium-ion batteries. It is also applied in glass, ceramics, inks, paints, and varnishes. It is also utilized as electroplating for its attractive appearance. Cobalt Oxide is used in glazes, glass, and enamels and it the most powerful ceramic colorant. Cobalt oxide is employed as an electrode in lithium-ion batteries, in the form of cobalt nanoparticles.

In the chemical industry, Cobalt Oxide powder is used in producing cobalt salts and also it is used in a wide variety of coloring applications. Moreover, currently, this oxide powder is being tested as a material to be used in super-conductors. However, certain perovskite structured oxides such as cobalt oxide are electronically conductive finding application in the cathode of solid oxide fuel cells and oxygen generation systems.

Cobalt oxide powder: It exhibits magnetic permeability and cobalt is often alloyed with other metals because of its unusual magnetic strength. It is also utilized in electroplating due to its appearance, hardness, and resistance to oxidation. This versatile metal is frequently utilized in traditional areas, such as superalloys.

Cobalt oxide powder: It has also greater utilization in some newer applications, such as in rechargeable batteries. Several cobalt compounds are employed in chemical reactions as catalysts. The temperature stability of cobalt alloys makes them worthy for use in turbine blades for gas turbines and jet aircraft engines. Cobalt-based alloys exhibit properties such as corrosion and wear-resistant.