Novel heat dissipation insulating composite material and preparation method therefor
An insulating composite material, a new type of technology, applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of reduced LED life, low thermal conductivity, reduced thermal conductivity, etc., to achieve great market competitiveness, low thermal expansion coefficient, The effect of improving the mechanical strength
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[0047] Example: Preparation and performance test of a novel heat-dissipating and insulating composite material.
[0048] The artificial graphite purchased on the market is pretreated by conventional methods and cut into block graphite preforms of 300mm×240mm×140mm (density 1.8g / cm 3 ; The average interplanar spacing d002 is 0.32nm; the pore diameter is 2μm; the porosity is 15%).
[0049] Cut the above block graphite preform along the 300mm direction into 240mm (length) × 140mm (width) × 1.5mm (thickness) graphite sheets (200 pieces), buy 240mm (length) × 140mm (width) × 0.38 from the market mm (thick) alumina ceramic sheets (100 sheets), and arranged in a sandwich structure in the manner of 2 layers of graphite sheets and 1 layer of alumina ceramic sheets, and an iron plate (thickness of 0.2mm) to isolate multiple sandwich structures , After fixing the whole with a metal frame (such as Figure 5 (Shown) placed in the mold.
[0050] Put the metal aluminum in a crucible furnace and h...
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