The method for preparing products comprising copper or copper alloys for electrical applications, comprises melting the copper or copper alloy, adding the melt to a casting mold (7), and applying to the product. The copper alloy has a melting point of higher than 1035[deg] C. A cooling rate of the melt is greater than 102 K/s, and the molten material is overheated to 15-20% of its melting point. The deoxidation of the melt is carried out with a deoxidizer. The casting mold consists of materials having an average thermal conductivity of greater than 100 W/(m.K). The method for preparing products comprising copper or copper alloys for electrical applications, comprises melting the copper or copper alloy, adding the melt to a casting mold (7), and applying to the product. The copper alloy has a melting point of higher than 1035[deg] C. A cooling rate of the melt is greater than 102 K/s, and the molten material is overheated to 15-20% of its melting point. The deoxidation of the melt is carried out with a deoxidi
