Method for preparing hollow hexagonal-prism-shaped hydroxyapatite crystal
A technology of hydroxyapatite and hexagonal prisms, which is applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems that the size, shape and structure of hydroxyapatite cannot be effectively controlled, and the loading process is limited. Achieve the effects of low toxicity, convenient regulation and simple installation
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Embodiment 1
[0017] 1) Prepare an aqueous solution containing 0.091 moles per liter of L-glutamic acid, 0.024 moles per liter of disodium hydrogen phosphate and 0.039 moles per liter of sodium hydroxide, stir at room temperature to dissolve completely, then add yttrium nitrate, calcium nitrate and Urea to concentrations of 0.004, 0.022 and 0.056 moles per liter, respectively;
[0018] 2) Stir the solution in step 1) evenly and transfer it to a stainless steel autoclave with a charging rate of 90%, treat it at 100oC for 24 hours, then raise the temperature to 160oC and treat it for 24 hours, then cool to room temperature;
[0019] 3) The reaction product obtained in step 2) is filtered, washed and dried to prepare hollow hexagonal hydroxyapatite crystals.
[0020] The product was identified as hydroxyapatite by X-ray powder diffraction (see figure 1 ). SEM scanning electron microscope inspection product morphology (see figure 2 ).
Embodiment 2
[0022] 1) Prepare an aqueous solution containing 0.091 moles per liter of L-glutamic acid, 0.024 moles per liter of disodium hydrogen phosphate and 0.039 moles per liter of sodium hydroxide, stir at room temperature to dissolve completely, then add yttrium nitrate, calcium nitrate and Urea to concentrations of 0.013, 0.013 and 0.056 moles per liter, respectively;
[0023] 2) Stir the solution in step 1) evenly and transfer it to a stainless steel autoclave with a charging rate of 90%, treat it at 100oC for 24 hours, then raise the temperature to 160oC and treat it for 24 hours, then cool to room temperature;
[0024] 3) The reaction product obtained in step 2) is filtered, washed and dried to prepare hollow hexagonal hydroxyapatite crystals.
[0025] The product was identified as hydroxyapatite and a small amount of yttrium phosphate by X-ray powder diffraction. SEM scanning electron microscope inspection product morphology (see image 3 ).
Embodiment 3
[0027] 1) Prepare an aqueous solution containing 0.091 moles per liter of L-glutamic acid, 0.029 moles per liter of disodium hydrogen phosphate and 0.039 moles per liter of sodium hydroxide, stir at room temperature to dissolve completely, then add yttrium nitrate, calcium nitrate and Urea to concentrations of 0.004, 0.022 and 0.056 moles per liter, respectively;
[0028] 2) Stir the solution in step 1) evenly and transfer it to a stainless steel autoclave with a charging rate of 90%, treat it at 100oC for 24 hours, then raise the temperature to 160oC and treat it for 24 hours, then cool to room temperature;
[0029] 3) The reaction product obtained in step 2) is filtered, washed and dried to prepare hollow hexagonal hydroxyapatite crystals.
[0030] The product was identified as hydroxyapatite by X-ray powder diffraction. SEM scanning electron microscope inspection product morphology (see Figure 4 ).
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