▎ 摘　　要

NOVELTY - The wick structure has a core portion (15) that is configured to be in contact with a vapour space and formed of graphene. A porous structure with graphene ribs (17) is attached to the porous structure. The porous structure is covered partially with a graphene layer (19). The thickness of layer is between 1 nanometer and 1 micron. The thickness of layer is between 1 micron and 20 micron. The thickness is between 1 micron and 10 micron. USE - Wick structure for use in evaporator in two-phase heat transfer apparatus and heat pipes (HP), loop HP (LHP) and capillary pumped loops (CPL) (all claimed). ADVANTAGE - The thermal conductivity and capillary pressure of the wick are improved. The full graphene wick having the flat geometry is produced by providing the evaporator housing with the top surface removed, depositing graphene sheets on the bottom of the evaporator, shaping the graphene to form the ribs and attaching the evaporator's top surface. DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of an evaporator for use in an LHP provided with a wick structure. Central channel (10) Core portion (15) Rib (17) Valley (18) Graphene layer (19)