Technological process for preparing beta-tricalcium phosphate micro powder by sol-gel self-propagating combustion method
A tricalcium phosphate micropowder, self-propagating combustion technology, applied in the field of chemical and biological materials, can solve the problems of difficult to accurately control the material ratio, uneven particle size of β-TCP, easy mixing of impurity phases, etc., to achieve a single crystal phase, The effect of small average particle size and uniform distribution
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Embodiment 1
[0017] Accurately weigh 0.0926mol of Ca(NO 3 ) 2 4H 2 O, 0.0926mol of citric acid and 0.0617mol of (NH 4 )H 2 PO 4 , were dissolved in 200ml deionized water respectively to obtain respective transparent solutions; under stirring conditions, the above citric acid solution, (NH 4 )H 2 PO 4 The solution was slowly added dropwise to the Ca(NO 3 ) 2 in solution. During the reaction, slowly drop by drop 0.5mol l -1 Adjust the pH value of the reaction solution to 2 with dilute nitric acid, slowly heat and hydrolyze until the sol appears. Then, the temperature was raised to 80°C, stirred, and the water was slowly evaporated at a constant temperature, and the sol was transformed into a gel. Then raise the temperature to 95° C., continue to evaporate water, and make the gel completely form a xerogel. Collect the dry gel and move it into a constant temperature electric furnace at 250°C. In the furnace, the dry gel is spontaneously ignited, burns rapidly, expands in volume, an...
Embodiment 2
[0020] Accurately weigh 0.0926mol of Ca(NO 3 ) 2 4H 2 O, 0.0926mol of citric acid and 0.0597mol of (NH 4 )H 2 PO 4 , were dissolved in 200ml deionized water to obtain respective transparent solutions. Under stirring conditions, the above citric acid solution, (NH 4 )H 2 PO 4 The solution was slowly added dropwise to the Ca(NO 3 ) 2 in solution. During the reaction, slowly drop by drop 0.5mol l -1 Adjust the pH value of the solution to 4 with dilute nitric acid, and slowly heat and hydrolyze until the sol appears. Then, the temperature was raised to 90°C, stirred, and the water was slowly evaporated at a constant temperature, and the sol was transformed into a gel. Then raise the temperature to 100°C, continue to evaporate water, and make the gel completely form a xerogel. Collect the dry gel and move it into a constant temperature electric furnace at 350°C. In the furnace, the dry gel is spontaneously ignited, burns rapidly, expands in volume, and produces white p...
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