... 1)CuO%,98%;Cu,78.2% 2)Package,25kg/bag 3)Usage,circuit board plating, Ferrite magnetic materials English name: Copper oxide ... Relative density 6.315, melting point 1446 °C, Mohs hardness 3-4, dielectric constant 18.10, insoluble in water, soluble in ... temperature can be reduced to metallic copper. Mainly used for circuit board plating, Ferrite magnetic materials and other electronic industries, glass ...