Abstract: A method for preparing expanded foamed graphite film includes the following steps: Step A: impregnating a synthetic graphite film into an intercalator for an interlayer intercalation treatment to prepare an intercalated graphite film; Step B: performing a thickness-limited expansion and foaming to the intercalated graphite film obtained in Step A, with an expansion ratio y of 2-25, to obtain an expanded foamed intercalated graphite film.

Abstract: A method for preparing expanded foamed graphite film includes the following steps: Step A: impregnating a synthetic graphite film into an intercalator for an interlayer intercalation treatment to prepare an intercalated graphite film; Step B: performing a thickness-limited expansion and foaming to the intercalated graphite film obtained in Step A, with an expansion ratio y of 2-25, to obtain an expanded foamed intercalated graphite film.

Abstract: The present application disclose a method for preparing an oriented heat conducting sheet, which includes the following steps: Step S1, preparing a fluid composition for the heat conducting sheet; Step S2, placing the fluid composition obtained in the step S1 in an orientation molding device, applying a circumferential high-speed shear force to the fluid composition layer by layer to enable thermal conducting fillers in the fluid composition to be oriented along a shear direction to form an oriented thin-layer composition, and collecting the thin-layer composition layer by layer in a die to form a continuous multi-layer aggregate; Step S3, heat curing the multi-layer aggregate to obtain an oriented composition block; and S4, slicing the oriented composition block along the direction perpendicular to an orienting direction of the oriented composition block to obtain an oriented heat conducting sheet.