Hydroxy apatite-base composite bioceramic material, and its preparing process
A technology of composite bioceramics and hydroxyapatite, which is applied in the interdisciplinary field of materials science and biomedicine, can solve the problems of difficulty in synthesizing required materials, high cost of carbon nanotube preparation, and large fluctuation range of mechanical properties of composite materials. Achieve the effects of lowering the sintering temperature, reducing the resistance of diffusion and mass transfer, and accelerating the flow and mass transfer speed
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Embodiment 1
[0012] Embodiment one: hydroxyapatite, aluminum oxide, diopside are prepared raw material according to the mass percentage of hydroxyapatite 89.5%, aluminum oxide 10%, diopside 0.5%, adopt alumina ball to mix ball mill, milling time 70 Hours, the ball-milled powder passed through a 100-mesh sieve to obtain a mixed powder. Put the mixed powder into a graphite mold for compression molding, hot press sintering in a nitrogen atmosphere, the sintering temperature is 1320°C, the sintering pressure is 28MPa, the sintering time is 1 hour, and the heat preservation is 30 minutes. The obtained hydroxyapatite-based composite bioceramic material has a Vickers hardness of HV4.0GPa, a flexural strength of 103MPa, and a fracture toughness of 2.50MPa m 1 / 2 .
Embodiment 2
[0013] Embodiment two: other is with embodiment one, difference is that hydroxyapatite, aluminum oxide, diopside prepare raw material by the mass percentage of hydroxyapatite 79%, aluminum oxide 20%, diopside 1%, sintering The temperature is 1300°C, the sintering pressure is 20MPa, and the heat preservation time is 40 minutes. The Vickers hardness of the prepared hydroxyapatite-based composite bioceramic material is HV4.64GPa, the bending strength is 128MPa, and the fracture toughness is 2.26MPa m 1 / 2 .
Embodiment 3
[0014] Embodiment three: other is with embodiment one, and difference is that hydroxyapatite, aluminum oxide, diopside prepare raw material by the mass percentage of hydroxyapatite 58%, aluminum oxide 40%, diopside 2%, sintering The temperature is 1310°C, the sintering pressure is 30MPa, and the heat preservation is 60 minutes. The Vickers hardness of the prepared hydroxyapatite-based composite bioceramic material is HV5.87GPa, the bending strength is 200MPa, and the fracture toughness is 2.78MPa m 1 / 2 .
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