Preparation method for medical porous tantalum implant material

摘要

A method for preparing a porous tantalum medical implant material, which includes (a) mixing a polyethylene glycol aqueous solution and tantalum powder to form a tantalum slurry, (b) casting the tantalum slurry into an organic foam body through vibrant pressurization, and (c) performing steps of drying, degreasing, vacuum sintering and thermal treatment to obtain the porous tantalum. The solution is a 2-8 wt % polyethylene glycol aqueous solution, the frequency of vibration is 20-80 times/min, the thermal treatment is performed under 10−4-10−3 Pa of vacuity and the temperature is first increased to 800-900° C. at a rate of 10-20° C./min and kept at 800-900° C. for 240-480 minutes, then is decreased to 400° C. at a rate of 2-5° C./min and kept at 400° C. for 120-300 minutes, and is cooled down to room temperature naturally in the furnace.

主权项

1. A method for preparing a porous tantalum medical implant material, comprising:
(a) mixing a polyethylene glycol (PEG) solution and tantalum powder to form a tantalum slurry wherein the solution is a 2-8 wt % polyethylene glycol aqueous solution; (b) casting the tantalum slurry into an organic foam body through vibrant pressurization wherein the vibrant pressurization is performed using a frequency of vibration of 20-80 times/min; (c) performing steps of drying, degreasing, vacuum sintering and thermal treatment to thereby obtain the porous tantalum, wherein the thermal treatment is performed under 10−4-10−3 Pa of vacuity and the temperature is increased to 800-900° C. at a rate of 10-20° C./min and maintaining the temperature at 800-900° C. for 240-480 minutes, then decreasing the temperature to 400° C. at a rate of 2-5° C./min and maintaining the temperature at 400° C. for 120-300 minutes, and cooling the temperature down to room temperature naturally in the furnace.