▎ 摘　　要

NOVELTY - A power-battery relay contact material comprises 15-20 pts. wt. cobalt, 20-30 pts. wt. tungsten, 20-30 pts. wt. titanium diboride, 30-40 pts. wt. aluminum nitride, 20-30 pts. wt. copper, 5-10 pts. wt. silver, 0.01-0.05 pt. wt. graphene, 40-50 pts. wt. filled high-molecular polymer, 2-5 pts. wt. dispersant, 5-8 pts. wt. crosslinked adhesive, 3-4 pts. wt. coupling agent, 3-6 pts. wt. chitosan acetate-polyethyleneimine, 6-8 pts. wt. hydroxyapatite, 2-3 pts. wt. sodium tartrate and 0.5-1.5 pts. wt. sodium dodecylbenzenesulfonate. USE - Contact material is used for power-battery relay. ADVANTAGE - The power-battery relay contact material has large current breaking capacity, high voltage strength, electrical conductivity, thermal conductivity and mechanical strength, and excellent flame resistant property, deformation resistance and wear resistance, and low arc burnout rate and cut-off value. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of power-battery relay contact material, which involves dissolving cobalt, tungsten, titanium diboride, aluminum nitride, copper and silver powder in 10% sodium hydroxide solution, adding 5-10 ml acetone, stirring for 1 hour, adding silver nitrate solution, adjusting the pH to 10-12, adding 15-20 ml formaldehyde solution to gel the metal powder solution, adding dispersant and sodium dodecylbenzenesulfonate to distilled water, adding graphene, centrifuging, stirring at 1000-2000 rpm for 30-60 minutes, obtaining graphene dispersion solution, adding obtained dispersion solution to the colloidal metal solution, adding coupling agent, stirring for 5-10 minutes, adding chitosan acetate-polyethyleneimine and formaldehyde solution, stirring for 5-10 minutes, obtaining chitosan acetate-polyethyleneimine-coated colloidal metal microsphere solution, washing twice using ethanol, adding hydroxyapatite and sodium tartrate to the colloidal metal microsphere solution, stirring for 10-15 minutes, adding crosslinked adhesive, filled high-molecular polymer and benzoyl peroxide, mixing in a single-screw extruder, placing in an oven under anaerobic condition, preheating at 100-110 degrees C for 5-10 minutes, preheating at 140-150 degrees C for 10-15 minutes and post-treating by pressurizing to 200-250 kg/cm3 for 30-40 minutes.