| 摘要 |
<p>A medical porous metal material for dental bone replacement and preparation method therefor, produced as follows: mixing tantalum powder, polyvinyl alcohol, and sodium bicarbonate into a powder mixture, press-forming the powder mixture into an organic foamed body under 50 to 100 Mpa, then degreasing, sintering, cooling, and performing a heating process. The heating process step comprises: within a vacuum degree of 10-4 to 10-3 Pa, increasing the temperature to 800 to 900°C at a speed of 10 to 20°C/min, maintaining the temperature for 240 to 480 minutes, cooling to 400°C at a speed of 2 to 5°C/min, maintaining the temperature for 120 to 300 minutes, and cooling together with the furnace to room temperature. The medical porous tantalum material produced has a diameter of 10 to 25 mum, a porosity of 25% to 35%, an elastic modulus of 6.0 to 7.0 Gpa, and an elongation rate of 14% to 15%.</p> |
