THERMALLY CONDUCTIVE, ELECTRICALLY INSULATING FILLER FOR COILED WIRES

• Main Authors: XIE, Yuming, AL-HUSSAIN, Saad Nasser, ODEH, Ihab Nizar
• Format: Patent
• Language: English
• Published: 07.05.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; COMPOSITIONS BASED THEREON; CONDUCTORS; ELECTRICITY; INDUCTANCES; INSULATORS; MAGNETS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSFORMERS; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

A filler composition includes fully or partially oxidized graphene or boron nitride nano sheets and a thermal setting polymer matrix. The fully or partially oxidized graphene or boron nitride nano sheets are embedded within the polymer matrix, and the filler composition: (i) has a thermal conductivity greater than or equal to 3 W/mK; (ii) has an electric breakdown voltage greater than or equal to 10 kV/mm; (iii) is pourable; and (iv) is located between an electromagnetic wire of an electromagnetic coil. The filler composition can also include the nano sheets bound to the surfaces of a plurality of co-particles that can increase the thermal conductivity through the filler. The polymer matrix can be a polyester imide, a polyamide-imide, polysulfones, a polyimide, a polyether ketone, or combinations thereof.