A method for selectively preparing a single crystal copper foil with specific index crystal faces by texture control

Abstract

The present application provides a kind of texture control selective preparation specific index crystal face single crystal copper foil and its preparation method, comprising the following steps: a) after surface cleaning to polycrystalline copper plate, carry out multi-pass cold rolling treatment, obtain cold-rolled copper foil;B) the cold-rolled copper foil obtained in step a) is washed and low-temperature recrystallization annealing treatment;C) the copper foil obtained in step b) is electrolytic polishing treatment;D) the copper foil obtained in step c) is high-temperature annealing treatment in reducing atmosphere, obtain low-index crystal face single crystal copper foil;Or, the copper foil obtained in step c) is first pre-oxidation treatment, then high-temperature annealing treatment in reducing atmosphere, obtain high-index crystal face single crystal copper foil.The copper foil prepared by single crystallization method has excellent electrical conductivity and mechanical properties, and is expected to realize industrialization and large-scale production in the future.