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Synthesis technique of beta-calcium orthophosphate

A calcium phosphate technology, which is applied in the field of synthesis of β-calcium phosphate materials, can solve the problems of large grain size, time-consuming, easy to stick to dirt, etc., and achieve the effect of stable product performance, strong repeatability, and simple process

Inactive Publication Date: 2009-05-06
邓旭亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry method is synthesized by solid-state reaction, which can produce powder with better crystallization, but the grain size is large, and there are often impurities. It is not only time-consuming but also easy to stick to dirt during grinding, so it is rarely used in the field of bioceramics.

Method used

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  • Synthesis technique of beta-calcium orthophosphate
  • Synthesis technique of beta-calcium orthophosphate
  • Synthesis technique of beta-calcium orthophosphate

Examples

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Embodiment 1

[0026] The formula of each component is shown in Table 1. Weigh an appropriate amount of PS microspheres, add concentrated sulfuric acid, stir on a magnetic stirrer for 5 hours, and disperse by ultrasonic for half an hour, repeating 2-3 times. After being centrifuged and washed with absolute ethanol, it was dried and set aside. Weigh calcium nitrate and diammonium hydrogen phosphate to make a saturated solution, slowly drop diammonium hydrogen phosphate into the calcium nitrate solution with a ratio of calcium to phosphorus of 1.5:1, and add vulcanized PS microspheres and surfactant CTAB at the same time Adjust the pH value of the reaction with ammonia water at about 9, stir on a magnetic stirrer, age after the reaction is sufficient, centrifuge and wash repeatedly with absolute ethanol, dry in a drying oven at 70°C, and calcined to 700°C, 800°C, 850°C Keep warm for 3 hours respectively.

[0027] Table 1: Formulation of each component

[0028]

Embodiment 2

[0030] Weigh an appropriate amount of PS microspheres, add concentrated sulfuric acid, stir on a magnetic stirrer for 6 hours, disperse by ultrasonic for half an hour, repeat 2-3 times. After being centrifuged and washed with absolute ethanol, it was dried and set aside. Weigh calcium nitrate and diamine hydrogen phosphate to form a saturated solution, the molar ratio of calcium to phosphorus is 1.4:1, add vulcanized PS microspheres and surfactant CTAB ammonia water at the same time to adjust the pH value of the reaction to about 8.5, magnetically stir Stir on the container, age after the reaction is complete, centrifuge and wash repeatedly with absolute ethanol, dry in an oven at 70°C, and calcined to 700°C, 800°C, and 850°C for 3 hours respectively.

Embodiment 3

[0032] Weigh an appropriate amount of PS microspheres, add concentrated sulfuric acid, stir on a magnetic stirrer for 5 hours, disperse by ultrasonic for half an hour, repeat 2-3 times. After being centrifuged and washed with absolute ethanol, it was dried and set aside. Weigh calcium nitrate and diammonium hydrogen phosphate to form a saturated solution. The molar ratio of calcium to phosphorus is 1.6:1. At the same time, add vulcanized PS microspheres and surfactant CTAB ammonia water to adjust the pH value of the reaction to about 8. Magnetic stirring Stir on the container, age after the reaction is complete, centrifuge and wash repeatedly with absolute ethanol, dry in an oven at 70°C, and calcined to 700°C, 800°C, and 900°C for 3 hours respectively.

[0033] The invention synthesizes β-calcium phosphate with pore size and high purity by adding PS microspheres in the chemical reaction process. The PS microspheres are used as templates, and have the characteristics of simple...

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Abstract

The invention discloses a synthesis technique used for a Beta-calcium phosphate material, comprising the steps as follows: quantitative polystyrene microspheres are added into concentrated sulfuric acid, sufficiently mixed and dispersed by ultrasonic, centrifuged, washed and dried, thus gaining vulcanized polystyrene microspheres; calcium nitrate solution is complexed with diammonium phosphate solution so as to lead the molar ratio of calcium and phosphorus in the complexed solution to be 1.4-1.6; the pH value of the solution is adjusted to be 8-10; furthermore, a surfactant (CTAB) and the vulcanized polystyrene microspheres are added in the complex so as to react sufficiently and gain a white substance which is washed, dried and calcined in a heating surface; subsequently, the white substance is heat-preserved for 2-4 hours at the temperature of 700-1000 DEG C and cooled with the furnace to gain the Beta-calcium phosphate powder. The synthesis technique adds the PS microspheres in the chemical reaction process to synthesize the Beta-calcium phosphate with the aperture and high purity, and has the advantages of simple process, strong repeatability, stable performance of the product, and the like.

Description

technical field [0001] The invention belongs to the field of material science, in particular to a synthesis technology of β-calcium phosphate materials. Background technique [0002] Tricalcium Phosphate, referred to as TCP, Ca 3 (PO 4 ) 2 . Since 1980, the research on the biodegradable calcium phosphate material TCP (α-TCP, β-TCP) has attracted extensive attention of many scholars. There are two kinds of high-temperature α-phase and low-temperature β-phase. The composition of TCP is the same as that of HAP, both contain CaO and P 2 o 5 . Among them, β-TCP is the most widely used. The crystal system of the α phase is monoclinic, and the lattice constant a = 12.89 A ` , b = 27.28 A ` , c = 15.22 A ` , The density is 2.86g / cm 3 . The β p...

Claims

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Application Information

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IPC IPC(8): C01B25/32
Inventor 邓旭亮林元华夏春杰马琦胡晓阳
Owner 邓旭亮
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