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 of limiting the loading process and being unable to effectively control the size, shape and structure of hydroxyapatite, Achieve the effects of convenient regulation, low toxicity and low production cost
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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. After stirring at room temperature to completely dissolve them, add yttrium nitrate, calcium nitrate and Urea, so that its concentration is 0.004, 0.022 and 0.056 moles per liter;
[0018] 2) Stir the solution of step 1) uniformly and transfer it to a stainless steel autoclave with a charging rate of 90%. Treat it at 100oC for 24 hours and then heat up to 160oC and cool to room temperature after processing for 24 hours;
[0019] 3) The reaction product obtained in step 2) is filtered, washed and dried to prepare hollow hexagonal columnar hydroxyapatite crystals.
[0020] The product was identified as hydroxyapatite by X-ray powder diffraction (see figure 1 ). SEM Scanning Electron Microscope to inspect 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. After stirring at room temperature to completely dissolve them, add yttrium nitrate, calcium nitrate and Urea, so that its concentration is 0.013, 0.013 and 0.056 moles per liter;
[0023] 2) Stir the solution of step 1) uniformly and transfer it to a stainless steel autoclave with a charging rate of 90%. Treat it at 100oC for 24 hours and then heat up to 160oC and cool to room temperature after processing for 24 hours;
[0024] 3) The reaction product obtained in step 2) is filtered, washed and dried to prepare hollow hexagonal columnar 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 to inspect 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. After stirring at room temperature to completely dissolve them, add yttrium nitrate, calcium nitrate and Urea, so that its concentration is 0.004, 0.022 and 0.056 moles per liter;
[0028] 2) Stir the solution of step 1) uniformly and transfer it to a stainless steel autoclave with a charging rate of 90%. Treat it at 100oC for 24 hours and then heat up to 160oC and cool to room temperature after processing for 24 hours;
[0029] 3) The reaction product obtained in step 2) is filtered, washed and dried to prepare hollow hexagonal columnar hydroxyapatite crystals.
[0030] The product was identified as hydroxyapatite by X-ray powder diffraction. SEM Scanning Electron Microscope to inspect product morphology (see Figure 4 ).
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