▎ 摘　　要

NOVELTY - Far-infrared quartz tube comprises a quartz tube, a conductive film layer and a far-infrared coating, where the conductive film is coated on the surface of the quartz tube. The far-infrared coating is applied to the surface of the conductive film. The conductive film layer is formed of conductive paste comprising 10-15 pts. wt. carbon nanotubes, 5-10 pts. wt. graphene, 60-70 pts. wt. solvent (A) and 4-5 pts. wt. polyethylene glycol. The far-infrared coating comprises 20-30 pts. wt. silicone acrylic emulsion, 4-5 pts. wt. sodium pyrophosphate, 1-2 pts. wt. film-forming additive, 10-15 pts. wt. activator, 12-16 pts. wt. filler, 5-6 pts. wt. binder, 35-40 pts. wt. far-infrared powder, 8-12 pts. wt. tin oxide and 80-100 pts. wt. solvent (B). USE - The far-infrared quartz tube is useful for an electronic cigarette heater. ADVANTAGE - The tube adopts far-infrared heating method, and has high electrothermal radiation conversion rate and excellent heating performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the far-infrared quartz tube, involving (a) adding carbon nanotubes, graphene and polyethylene glycol to solvent (A), and stirring at 3000 rpm for 40-60 minutes to obtain a conductive slurry, (b) adding sodium pyrophosphate, film-forming additive, activator, binder and half of the weight of solvent (B) in a disperser, and stirring at 500 rpm for 10-15 minutes to obtain a mixed slurry, (c) adding filler, far-infrared powder and tin oxide to the mixed slurry, and stirring at a speed of 1200 rpm for 30-40 minutes to obtain a slurry, (d) adding the silicone-acrylic emulsion and the remaining solvent (B) to the slurry, and stirring for 40-50 minutes at a speed of 200 rpm to obtain the far-infrared coating, (e) coating the conductive slurry on the surface of the quartz tube to obtain a conductive film layer, coating the far-infrared coating on the surface of the conductive film layer to obtain the far-infrared coating to obtain the product.