KobolttiIIoksidilla

Koboltti(II)oksidi, also known as cobalt(II) oxide, is an inorganic compound with the chemical formula CoO. It is a green or black solid depending on its particle size and preparation method. Koboltti(II)oksidi is a semiconductor and exhibits a range of interesting physical and chemical properties.

This compound is insoluble in water but dissolves in acids to form cobalt(II) salts. It is a crucial component in the production of various pigments, particularly for coloring glass and ceramics blue. The vibrant blue hue achieved using cobalt(II) oxide has been prized for centuries. Beyond its pigment applications, it finds use in the manufacturing of semiconductors, catalysts, and as a source of cobalt in other chemical syntheses.

Koboltti(II)oksidi can be prepared by the thermal decomposition of cobalt(II) carbonate or cobalt(II) nitrate in the absence of air, or by the reduction of cobalt(III) oxide at elevated temperatures. It is generally considered to be a stable compound under normal conditions. Its magnetic properties also contribute to its use in certain electronic components.