Abstract:
A thermal interface material includes 100 parts by weight of base oil including amino-modified silicone fluid and at least one of methylphenylsilicone fluid and fluorosilicone fluid, and 800 to 1200 parts by weight of fillers filled in the base oil. The fillers have an average particle size of 0.1 to 5 um and are selected from the group consisting of zinc oxide powder, alumina powder and metallic aluminum powder.
Abstract:
A heat pipe includes a hollow tube, a working medium filled in the tube, and a wick structure disposed in and contacting with the tube. The wick structure is formed by weaving first wires and second wires together. The second wires each have two opposite major surfaces. A portion of one of the two major surfaces contacts with an interior wall of the tube.
Abstract:
A method is disclosed to produce a wick structure for a heat pipe. The wick structure is a sintered powder wick and is produced by sintering process. A group of powders is firstly provided. The group of powders is then classified into many sub-groups in terms of powder size. At least one sub-group of the powders is selected to form the wick structure via the sintering process. Thus, the powders used to construct the wick structure are confined to powders having a relatively narrower range of powder size in relative to the group of powders as originally provided. This has greatly reduced the complexity involved in the sintering process, and as a result, the required sintering temperature and the required time for the sintering process are easier to be determined.
Abstract:
A method is disclosed to produce a heat pipe with a sintered powder wick formed inside the heat pipe. The method employs tape-casting technology to firstly produce thin sheets of powder and then these sheets are sintered to form the wick. In the tape casting procedure, a slurry of the powders necessary to construct said wick is cast onto a moving surface to form a slurry layer and then the slurry layer is dried to form a green tape. The green tape is rolled onto a mandrel and then is inserted into a hollow casing and sintered to cause the powders in the green tape to diffusion-bond together. Thus, the sintered powder wick is constructed.
Abstract:
A heat pipe (10) includes a casing (12) and a sintered powder wick (14) arranged at an inner surface of the casing. The sintered powder wick is in the form of a multi-layer structure of at least three layers and each layer has an average powder size different from that of the other layers, wherein the layer (143) with large-sized powders is capable of reducing the flow resistance to the condensed liquid to flow back while the layer (141) with small-sized powders is still capable of providing a relatively large capillary force for the wick.
Abstract:
A white light source using solid state technology, as well as general backlight units and liquid crystal displays (LCDs) that may incorporate such a white light source, are provided. The white light source described herein utilizes a monochrome light-emitting diode (LED) and a wavelength-converting layer having fluorescent materials to produce a substantially uniform broadband optical spectrum visible as white light. Being constructed on a metal substrate, the white light source may also provide for an improved heat transfer path over conventional solid state white light sources.
Abstract:
A heat conductive silicone composition comprises: (A) an alkenyl group-bearing organopolysiloxane, (B) an organohydrogenpolysiloxane having at least two Si—H groups therein, (C) a filler of aluminum powder or metal oxide powder, and (D) a coupling agent selected from titanate-based or aluminate-based coupling agent.
Abstract:
A silicone grease composition includes approximately 5 to 50% by weight of liquid organopolysiloxane, 45 to 94.9% by weight of a thermally conductive filler, and 0.1 to 5% by weight of a coupling agent chosen from at least one of a titanate-based coupling agent and an aluminate-based coupling agent. Due to the presence of the coupling agent, the silicone grease composition has a relatively lower viscosity and thus is capable of containing a larger amount of the filler whereby the thermally conductive efficiency of the composition is accordingly improved.
Abstract:
A semiconductor device (10) includes a heat source (12), a heat-dissipating component (13) for dissipating heat generated by the heat source, and thermal interface material (14) filled in spaces formed between the heat source and the heat-dissipating component. The thermal interface material includes 100 parts by weight of alkenyl groups-containing organopolysiloxane, and Si—H groups-containing compound selected from the group consisting of organo-hydrogenpolysiloxane and polyorganohydrogensiloxane, and 800 to 1200 parts by weight of fillers consisting of aluminum powder having a mean particle size of 0.1 to 1 um and zinc oxide powder having a mean particle size of 1 to 5 um in a weight ratio of from 1/1 to 10/1 .
Abstract:
A thermal interface material is for being applied to the contact surfaces to eliminate the air interstices between the heat dissipating apparatus and the electronic component in order to improve heat dissipation of the electronic component. The thermal interface material includes pentaerythritol oleate as base oil and fillers filled in the pentaerythritol oleate for improving the heat conductivity of the thermal interface material. The pentaerythritol oleate is used for holding the fillers therein and filling the air interstices to achieve an intimate contact between the heat dissipating apparatus and the electronic component. The fillers include aluminum powders, zinc oxide powders and zinc oxide nano-particles.