Measures for heat dissipation using the heat radiation rate of the ceramic circuit board

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Aug 21, 2014, 5:03:42 AM8/21/14

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Measures for heat dissipation using the heat radiation rate of the ceramic circuit board

Heat mode of transmission of "thermal conduction", "convection", three forms of "heat radiation", the spread of lattice vibrations, the movement of free electrons in the metal are "thermally conductive", below the heat transfer fluid movement "convection", through the electromagnetic wave transmission heat is the "heat radiation."

By using thermal radiation cooling, can improve the efficiency of the emitter of heat, eliminates the need for cooling fans. Not in use can reduce the risk of failure of the cooling fan (fan paralyzed due to some kind of failure, the risk can not heat), and, since no more sheet-like heat sink, it does not dust, eliminating the trouble of cleaning. In the manufacture of table lamps, cooling by thermal radiation, the successful implementation of the ultra-thin design source nearby housing.

It is interested in, whether it is large products, or small products, ceramic industry companies to provide lighting ceramic circuit board is basically the same. Ceramic circuit boards are wide length 55mm × 30mm long hexagonal transverse thickness of about 6mm, with a screw of the multi-chip-type LED module fixed to the circuit board to use. You can use a maximum power of 19W high power LED modules. Large product using multiple screws LED module in a ceramic circuit board, use a small product. A ceramic circuit board used as a material purity of 99.7% alumina, a thermal emissivity of 0.97. Smooth surface, the average roughness of 0.5μm, with screws directly to the LED module to the circuit board surface.

Compared with the metal circuit boards and printed circuit boards, ceramic circuit board facing the block is the high cost. However, if produced by means of increasing the amount of the effect universal ceramic circuit board, it is possible to curb the rising cost to some extent. This requires increasing the number of production, but as of now, mass production has not yet commenced, because business cost ceramic circuit board feel fear.

With ceramic circuit board, the total cost of the circuit board and heat sink cooling components used to install LED modules can reduce cooling costs in the future intend this as a selling point to advertise. The company is so confident, because the use of the company's products, lighting equipment companies in comparison with ceramic circuit board products and traditional thermal design of the product, and after taking into account the total cost, without exception, chose ceramic circuit board . For compression whether the popularity of the idea of the total cost, small in the future will be closely watched. Perhaps, you can shape a neat LED lighting to predict whether to increase the degree of popularity.

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