Flake alumina porous ceramic used for high-power LED lamp cooling fins, and preparation method thereof
A technology of flaky alumina and LED lamps, which is applied in the field of porous heat dissipation ceramics, can solve the problems of inhomogeneous dispersion of alumina, uneven ceramic structure, and poor compatibility, so as to reduce cracking failure problems, good transition, and improve phase capacitive effect
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[0015] A kind of sheet-shaped alumina porous ceramics for high-power LED lamp heat sink, made of the following parts by weight (kg) of raw materials: α-Al 2 O 3 (The particle size is 2-8μm) 35, deionized water 103, sodium polyacrylate 0.3, methyl cellulose 2.2, glycerol 1.7, MgF 2 0.6, micro silicon powder 1.4, magnesium powder 0.4, nano carbon 2.5, nano indium tin oxide 0.8, nano aluminum hydroxide 4.5, nano copper 1.3, PVA binder 1.
[0016] The method for producing sheet-shaped alumina porous ceramics for heat sinks of high-power LED lamps is characterized in that:
[0017] (1) The α-Al 2 O 3 , Deionized water and sodium polyacrylate mixed to obtain a suspension, ball mill the suspension for 5h, add MgF2, micro silicon powder, nano carbon, mix well, then add PVA binder, mix well, then add nano aluminum hydroxide, Ball mill for 0.7h and let stand for 50min to obtain slurry;
[0018] (2) Add methylcellulose and glycerol to the slurry obtained in step (1), continue ball milling for 2...
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