The manufacturing technology of alumina ceramic powder with high purity,superfine and high sintering activity is the main bottleneck in the development of advanced ceramic industry in China.In order to study the above-mentioned high-purity and low-temperature easy-to-sinter alumina ceramic powder,high-purity alumina ceramic powder with small particle size and narrow distribution was prepared by wet grinding,and characterized by laser particle size analyzer,scanning electron microscope and universal material testing machine,so as to explore the dispersion process conditions and sintering properties of the pow-der.The results show that the particle size of the ground powder is small and its distribution is narrow under the basic proportion.The median particle size D50 is 0.435 pm,D90/D10 is 5.2.The sintered density of the high-purity ultrafine powder is 3.925 g·cm-3 at 1550 ℃,and the three-point bending strength is 471 MPa.The mechanical properties after sintering are the best.
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