Preparation method of medical porous metal implant material
A technology of porous materials and metals, which is applied in the field of preparation of porous niobium implant materials, can solve the problems of insufficient purity of finished products, residues of carbon skeleton, and reduced biosafety, and achieves high purity, good biosafety, and low price. Effect
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Embodiment 1
[0030] Example 1: Weigh 8 g of starch and put it into a container with 240 ml of distilled water; place it on an electric stove to heat and stir to make it an aqueous starch solution. Use a 200g balance to weigh 60g of niobium powder with an average particle size of less than 43 microns and an oxygen content of less than 0.1%, add 15ml of cooled starch aqueous solution, stir and mix evenly, and make it into a niobium powder slurry. Use 10×10×30mm porous polyurethane foam (average pore diameter is 0.48mm, density 0.025g / cm 3 , hardness 50°) into it and pour until the pores of the polyurethane foam are filled with niobium powder slurry, then use a clip to take out the polyurethane foam filled with niobium powder slurry and put it into a porcelain plate. Dry in a vacuum drying oven at a drying temperature of 70° C., a drying time of 8 hours, and a vacuum degree of 1 Pa. Degreasing treatment: the vacuum degree is lower than 1×10 -3 Pa, temperature 600°C, holding time 2h. Vacuum...
Embodiment 2
[0033] Example 2: Weigh 5 g of starch and put it into a container with 200 ml of distilled water; place it on an electric stove to heat and stir to make it an aqueous starch solution. Use a 200g balance to weigh 40g of niobium powder with an average particle size of less than 43μm and an oxygen content of less than 0.1%, add 10ml of starch aqueous solution, stir and mix evenly, and make it into a niobium powder slurry. Use 10×10×25mm porous polyurethane foam (average pore diameter is 0.56mm, density 0.030g / cm 3 , hardness 60 0 ) into it and pour until the pores of the polyurethane foam are filled with the niobium powder slurry, and the polyurethane foam filled with the niobium powder slurry is taken out with a clip and put into the porcelain plate. Dry in a vacuum drying oven at a drying temperature of 80°C for a drying time of 4 hours and maintain a vacuum of 1×10 -2 Pa. Degreasing treatment: the vacuum degree is lower than 1×10 -3 Pa, temperature 800°C, holding time 6h. ...
Embodiment 3
[0036] Example 3: Weigh 6 g of starch and put it into a container with 220 ml of distilled water; place it on an electric stove to heat and stir to make it an aqueous starch solution. Use a 200g balance to weigh 45g of niobium powder with an average particle size of less than 43μm and an oxygen content of less than 0.1%, add 12ml of starch aqueous solution, stir and mix evenly, and make it into a niobium powder slurry. Use 8×8×25mm porous polyurethane foam (average pore size is 0.70mm, density 0.035g / cm 3 , hardness 70°) into it and pour until the pores of the polyurethane foam are filled with niobium powder slurry, then use a clip to take out the polyurethane foam filled with niobium powder slurry and put it into a porcelain plate. Dry in a vacuum drying oven, the drying temperature is 78 ° C, the drying time is 6 hours, and the vacuum degree is kept at 1×10 -1 Pa. Degreasing treatment: the vacuum degree is lower than 1×10 -3 Pa, temperature 700°C, holding time 1.5h. Vacu...
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