A controllable substance-doped strontium calcium phosphate powder and its preparation method
A technology of strontium calcium phosphate and powder, which is applied in the field of controllable substance-doped strontium calcium phosphate powder and its preparation, can solve the problems of difficult control of two-phase components and proportions, strict control of sintering temperature, and appearance of impurity phases, and achieve Improves the effect of osteoinductive properties and bioactivity
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Embodiment 1
[0027] (1) Prepare 0.5mol / L Ca(NO 3 ) 2 4H 2 O solution, 0.5mol / L Sr(NO 3 ) 2 solution and 0.25mol / L (NH 4 ) 3 PO 4 ·3H 2 O solution, as calcium source, strontium source and phosphorus source. According to the molar ratio of (Ca+Sr) / P=1.67, a certain amount of Ca(NO 3 ) 2 4H 2 O and Sr(NO 3 ) 2 After the solution is mixed, use concentrated ammonia water to adjust the pH of the solution to be greater than 11. After vigorously stirring at 30°C, add polyethylene glycol (molecular weight: 6000) dispersant, and stir for 30 minutes to obtain a mixed solution containing calcium source and strontium source.
[0028] (2) At the same time adjust with concentrated ammonia water (NH 4 ) 3 PO 4 ·3H 2 The pH value of the O solution is greater than 10 to obtain a solution containing a phosphorus source; after controlling the dropping rate to 4mL / min with a peristaltic pump, slowly drop the solution containing a phosphorus source into the mixed solution containing a calcium so...
Embodiment 2
[0036] (1) Prepare 0.5mol / L Ca(NO 3 ) 2 4H 2 O solution, 0.5mol / L Sr(NO 3 ) 2 solution and 0.25mol / L (NH 4 ) 3 PO 4 ·3H 2 O solution, as calcium source, strontium source and phosphorus source. According to the molar ratio of (Ca+Sr) / P=1.67, a certain amount of Ca(NO 3 ) 2 4H 2 O and Sr(NO 3 ) 2 After the solution is mixed, use concentrated ammonia water to adjust the pH of the solution to be greater than 11. After vigorously stirring at 30°C, add polyethylene glycol (molecular weight: 6000) dispersant, and stir for 30 minutes to obtain a mixed solution containing calcium source and strontium source.
[0037] (2) At the same time adjust with concentrated ammonia water (NH 4 ) 3 PO 4 ·3H 2 The pH value of the O solution is greater than 10 to obtain a solution containing a phosphorus source; after controlling the dropping rate to 4mL / min with a peristaltic pump, slowly drop the solution containing a phosphorus source into the mixed solution containing a calcium so...
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