A multiple liquid-phase construction method for the preparation of calcium phosphate active ceramic bone scaffolds
A technology of active ceramics and calcium phosphate, applied in the field of bone tissue engineering, can solve the problems of insufficient mechanical strength, difficult material sintering, low density, etc., and achieve the effects of improving mechanical properties, promoting extracellular response, and improving biological properties.
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Embodiment 1
[0021] 1. Weigh 3 grams, 2 grams and 1 gram of potassium carbonate, sodium carbonate and lithium carbonate powder respectively, and weigh 94 grams of hydroxyapatite powder, a total of 100 grams; then put the weighed powder into 900 grams of alcohol to prepare Make a 10% mixed solution, stir it with a magnetic stirrer at a rate of 1200r / min for 2 hours to make it uniform;
[0022] 2. Filter the mixed solution, then place it in a vacuum drying oven, dry it at 70°C for 8 hours, and then pass the dried mixed powder through ball milling for 20 hours to obtain a solid mixed uniform composite powder;
[0023] 3. Load the obtained composite powder into a selective laser auxiliary powder system, and use the sintering parameters such as a laser spot with a diameter of 0.8mm, a laser power of 7W, and a scanning speed of 100mm / min for sintering preparation in a nitrogen atmosphere.
Embodiment 2
[0025] 1. Weigh 1.5g, 1g and 0.5g of potassium carbonate, sodium carbonate and lithium carbonate powder respectively, weigh 97g of tricalcium phosphate powder, a total of 100g; then put the weighed powder into 900g of alcohol to prepare The 10% mixed solution was stirred by a magnetic stirrer at a rate of 1200r / min for 2 hours to make it uniform;
[0026] 2. Filter the mixed solution, then place it in a vacuum drying oven, dry it at 65 °C for 8 hours, and then pass the dried mixed powder through ball milling for 25 hours to obtain a solid-state mixed uniform composite powder;
[0027] 3. Load the obtained composite powder into a selective laser auxiliary powder system, and use the sintering parameters such as a laser spot with a diameter of 1mm, a laser power of 6W, and a scanning speed of 100mm / min to sinter and prepare in a nitrogen atmosphere.
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