Calcium silicon phosphate biomaterial and its preparation method and use
A biomaterial, calcium silicate phosphate technology, used in pharmaceutical formulations, dental preparations, compression mold cups, etc.
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Embodiment 1
[0074] (1) Mix 22.4 ml of tetraethyl orthosilicate with 4 ml of nitric acid at a concentration of 2 mol / L, add 9.6 ml of deionized water and 5.8 ml of absolute ethanol, stir at room temperature for 2 hours, then add 34.2 ml of phosphoric acid Triethyl ester, continue to stir for 2 hours, then add 118.1 grams of calcium nitrate tetrahydrate, and stir for 4 hours to obtain a silicon calcium phosphate sol; age the sol at 60°C for 48 hours to obtain a gel; put the gel at 120°C Dry for 120 hours to obtain xerogel;
[0075] (2) Grinding the xerogel into powder, calcining at 1400°C, the heating rate is 2°C / min, and the holding time at 1400°C is 6 hours to obtain silicon calcium phosphate (Ca 5 (PO 4 ) 2 SiO 4 ) powder.
[0076] The prepared powder was subjected to XRD test, and the diffraction peak of the powder was related to Ca 5 (PO 4 ) 2 SiO 4 The standard card (PDF No.40-0393) coincides (such as figure 1 ), indicating that the crystal phase of the synthesized powder is ...
Embodiment 2
[0078] (1) Mix 44.8 milliliters of tetraethyl orthosilicate with 8 milliliters of nitric acid at a concentration of 2 mol / liter, add 19.2 milliliters of deionized water and 11.6 milliliters of absolute ethanol, stir at room temperature for 3 hours, then add 68.4 milliliters of phosphoric acid Triethyl ester, continue to stir for 4 hours, then add 236.2 grams of calcium nitrate tetrahydrate, and stir for 6 hours to obtain a silicon calcium phosphate sol; age the sol at 60°C for 72 hours to obtain a gel; put the gel at 120°C Dry for 168 hours to obtain xerogel;
[0079] (2) Grinding the xerogel into powder, calcining at 1400°C, the heating rate is 2°C / min, and the holding time at 1400°C is 6 hours to obtain silicon calcium phosphate (Ca 5 (PO 4 ) 2 SiO 4 ) powder;
[0080] (3) Grind and sieve the calcium silicon phosphate powder, then weigh 0.2 gram of powder, and dry press it under 8 MPa to form a ceramic green body with a diameter of 10 mm and a thickness of 1 mm; place th...
Embodiment 3
[0083] (1) Mix 44.8 milliliters of tetraethyl orthosilicate with 8 milliliters of nitric acid at a concentration of 2 mol / liter, add 19.2 milliliters of deionized water and 11.6 milliliters of absolute ethanol, stir at room temperature for 3 hours, then add 68.4 milliliters of phosphoric acid Triethyl ester, continue to stir for 4 hours, then add 236.2 grams of calcium nitrate tetrahydrate, and stir for 6 hours to obtain a silicon calcium phosphate sol; age the sol at 60°C for 72 hours to obtain a gel; put the gel at 120°C Dry for 168 hours to obtain xerogel;
[0084] (2) Grinding the xerogel into powder, calcining at 1400°C, the heating rate is 2°C / min, and the holding time at 1400°C is 6 hours to obtain silicon calcium phosphate (Ca 5 (PO 4 ) 2 SiO 4 ) powder;
[0085] (3) Grinding and sieving the silicon calcium phosphate powder, and adding a polyvinyl alcohol aqueous solution with a concentration of 6wt% in the sieved powder, the addition quality of the polyvinyl alcoh...
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