Rare earth-modified flake alumina porous ceramic used for LED lamp heat dissipation, and preparation method thereof

The invention discloses a rare earth-modified flake alumina porous ceramic used for LED lamp heat dissipation. The rare earth-modified flake alumina porous ceramic is prepared from, by weight, 34 to 36 parts of alpha-Al2O3 (particle size ranging from 2 to 8m), 100 to 105 parts of deionized water, 0.2 to 0.3 part of sodium polyacrylate, 2 to 2.3 parts of methylcellulose, 1.6 to 1.8 parts of glycerin, 0.4 to 0.7 part of hydroxylapatite, 0.2 to 0.3 part of cerium powder, 1.3 to 1.5 parts of SiC micro powder, 0.4 to 0.6 part of magnesium phosphate, 4 to 5 parts of nano-aluminium hydroxide, 1.2 to 1.5 parts of nano-copper, and 0.9 to 1.1 parts of PVA binder Interlayer channels of the rare earth-modified flake alumina porous ceramic are communicated; transition performance and thermal fatigue resistance are excellent; the rare earth-modified flake alumina porous ceramic is provided with improved wear resistance, thermal conductivity, heat resistance, and excellent recombination property with metal via adding of hydroxylapatite, cerium powder, SiC micro powder, and magnesium phosphate.