A preparation method and application of laponite bioceramics
A bioceramic and hectorite technology, applied in medical science, prosthesis, etc., to achieve the effect of easy operation, good blood compatibility, and low cost of LAP
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[0049] The preparation method of hectorite bioceramic provided by the invention comprises:
[0050] Step 1, compressing artificially synthesized hectorite powder into tablets to obtain hectorite sheets; the amount of artificially synthesized hectorite powder for each hectorite sheet is 0.3-0.6g; the tabletting pressure is 8-15 MPa; The tableting process is tableting in a mold by uniaxial compression (uniaxial compression refers to the method of compressing powder with force along one axis).
[0051] Step 2, sintering the obtained hectorite flakes to obtain hectorite bioceramics; the sintering temperature is 600-800° C., and the sintering time is 2-6 h. The sintering process takes place in a muffle furnace. In the process of heating up to the sintering temperature during sintering, the heating rate is 2-15°C / min.
[0052] The preparation method of hectorite bioceramic provided by the present invention also includes characterizing the prepared hectorite bioceramic by scanning ...
Embodiment 1
[0075] Take 0.45 g of LAP powder, put it in a mold with a diameter of 14 mm, and compress it under a pressure of 10 MPa by uniaxial compression method to obtain LAP tablets. Four LAP sheets were placed in a muffle furnace and sintered according to the conditions shown in Table 1 to obtain LAP bioceramics, which were designated as samples 2-5.
[0076] The diameter of the sample before and after sintering was measured with a micrometer, and the calculated diameter shrinkage is shown in Table 1. The densities of all samples were measured using Archimedes' principle and divided by the original LAP powder to obtain the relative density changes (Table 1). The hydrophilicity of all samples was measured by contact angle. 1 μL of distilled water was dropped on the surface of the sample, and then measured with a contact angle meter. The results are shown in Table 1. The apparent morphology change of the LAP sheet prepared by the present invention is observed by SEM, as shown in Figure...
Embodiment 2
[0080] Get the LAP sheet and LAP bioceramic prepared in embodiment 1 respectively, for testing its XRD collection of patterns (see attached figure 2 ). XRD test results show that at a lower sintering temperature (600 o C), LAP does not undergo crystalline phase transformation before and after sintering. And at higher sintering temperature (800 o C), The characteristic diffraction peaks of sodium mica and enstatite appear in the spectrum, indicating that the generated LAP bioceramic contains crystal components such as LAP, sodium mica and enstatite.
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