▎ 摘　　要

NOVELTY - The heating tube (1) has ceramic insulating tube upper binding post (2), and a ceramic insulating tube lower binding post (3), in which the inner wall of the tube is provided with a graphene conductive coating on the inner wall of the ceramic insulating tube (4). The graphene conductive coating (5) is applied on the inner wall of the ceramic insulating tube and a connecting post is on the ceramic insulating tube, and a wiring is under the ceramic insulating tube. USE - Heating tube using electric medium to heat up. ADVANTAGE - Provides thermal efficiency that is high and it is hardly affected by scale. DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of the heating tube using electric medium to heat up. Heating tube (1) Ceramic insulating tube upper binding post (2) Upper binding post (2) Lower binding post (3) Ceramic insulating tube (4) Graphene conductive coating (5)