摘要:
A method for manufacturing an insulated heat conductive substrate comprises the steps of: performing hydrolysis and condensation of at least one thermally conductive ceramic powder to prepare at least one modified thermally conductive ceramic powder, which comprises a plurality of modified powder particles, each grafted with an organic material; mixing the at least one modified thermally conductive ceramic powder with two substantially mutually soluble polymers to achieve a uniform mixture; blending the uniform mixture with a curing agent to obtain a melt extrudable dielectric curable material; extruding the dielectric curable material through a slit to form a sheet-like substrate; and disposing a first film and a second film on two side surfaces of the substrate to obtain an insulated heat conductive substrate, wherein each of the first and second films can be either a metal foil or a release film.
摘要:
A heat-conductive dielectric polymer material includes a thermosetting epoxy resin, a nonwoven fiber component, a curing agent and a heat-conductive filler. The thermosetting epoxy resin is selected from the group consisting of end-epoxy-function group epoxy resin, side chain epoxy function group epoxy resin, multi-functional epoxy resin or the mixture thereof. The thermosetting epoxy resin comprises 4%-60% by volume of the heat-conductive dielectric polymer material. The curing agent is configured to cure the thermosetting epoxy resin at a curing temperature. The heat-conductive filler comprises 40%-70% by volume of the heat-conductive dielectric polymer material. The nonwoven fiber component comprises 1%-35% by volume of the heat-conductive dielectric polymer material. The heat-conductive dielectric polymer material has a thermal conductivity greater than 0.5 W/mK.
摘要:
A heat conductive dielectric polymer material comprises a polymer, a curing agent and a heat conductive filler. The polymer comprises a thermoplastic and a thermosetting epoxy resin. The thermoplastic comprises 3% to 30% by volume of the heat conductive dielectric polymer material, and the thermosetting epoxy is selected from end-epoxy-function group epoxy resin, side chain epoxy function group epoxy resin, multi-function group epoxy resin or the mixture thereof. The curing agent can cure the thermosetting epoxy resin at a temperature. The heat conductive filler is uniformly distributed in the polymer and comprises 40% to 70% by volume of the heat conductive dielectric polymer material. The heat conductive dielectric polymer material has an interpenetrating network structure, and the heat conductive coefficient is greater than 1.0 W/m-K.
摘要:
An over-current protection device includes two metal foils and a PTC material layer. The PTC material layer is laminated between the two metal foils and has a resistivity less than 0.4 Ω-cm. The PTC material layer includes crystalline polymer and electrically conductive ceramic filler dispersed in the crystalline polymer. The conductive ceramic filler is of HCP structure and includes 70-95% by weight of the PTC material layer. The trip jump value of the over-current protection device after 300 times trip is less than or equal to 25. The resistance repeatability of the device can be effectively improved by adding the conductive ceramic filler.