▎ 摘　　要

NOVELTY - The device (100) has a furnace (141) installed on the upper portion of a main unit. One side is connected to an air inlet, and the other side is connected to the vacuum chamber. A first heater (160) is mounted on the upper part of the chamber. A second heater (170) is installed below the chamber. A vacuum cover (120) surrounds the furnace, the first heater and the second heater and is connected to the vacuum unit to form a vacuum around the furnace. USE - Large area graphene preparation device. ADVANTAGE - The vacuum degree is accurately maintained, and the vacuum leakage is minimized such that high-quality large-area graphene is synthesized. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the large-area graphene preparation device. Large area graphene preparation device (100) Vacuum cover (120) Furnace (141) First heater (160) Second heater (170)