Black Nickel Oxide Powder has the chemical formula NiO. It is a substance composed of nickel and oxygen atoms that is black in color. Black nickel oxide is an oxide of nickel that is utilized in a variety of applications, such as ceramics, catalysts, pigments, and batteries. It has a high melting point and high-temperature stability. Black nickel oxide is created predominantly through the thermal decomposition of nickel salts or the oxidation of nickel metal.