▎ 摘　　要

NOVELTY - Preparing graphene-copper titanate calcium-polybenzoxazole three-phase composite film involves adding graphene and calcium copper titanate into the polybenzoxazole polymer, using graphene polybenzoxazole polymer formed within the micro-capacitance to improve the high temperature high dielectric composite film mediated electric constant. The calcium titanate having a large dielectric constant further increases the dielectric constant of the high temperature resistant high dielectric composite film and prevents the graphene from forming a conductive network in polybenzoxazole polymer. USE - Method for preparing graphene-copper titanate calcium-polybenzoxazole three-phase composite film (claimed) used in electric vehicle, aerospace electronics and oil exploration. DETAILED DESCRIPTION - Preparing graphene-copper titanate calcium-polybenzoxazole three-phase composite film involves adding graphene and calcium copper titanate into the polybenzoxazole polymer, using graphene polybenzoxazole polymer formed within the micro-capacitance to improve the high temperature high dielectric composite film mediated electric constant. The calcium titanate having a large dielectric constant further increases the dielectric constant of the high temperature resistant high dielectric composite film and prevents the graphene from forming a conductive network in polybenzoxazole polymer. The dielectric loss is reduced and high-temperature environment is accessed to meet the requirements of high-dielectric materials.