The metal oxide dissolved in pure copper is usually cuprous oxide (Cu_2O), so thedeoxidization of pure copper means the reduction of cuprous oxide to copper by addingdeoxidizers such as an element. It is required that the oxide of this element must be morestable than Cu_2O, i.e. its decomposition pressure is less than that of Cu_2O. The more the The metal oxide dissolved in pure copper is usually cuprous oxide (Cu 2 O), so the deoxidization of pure copper means the reduction of cuprous oxide to copper by adding antioxidants such as an element. It is required that the oxide of this element must be more capable than Cu 2 O, ie its decomposition pressure is less than that of Cu_2O. The more the