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The ¦Â-CS powders were prepared by the chemical precipitated reaction of
Ca(NO3)2¡¤4H2O with Na2SiO3¡¤9H2O. Briefly, 1000 ml of 0.4 mol Ca(NO3)2¡¤4H2O
solution was vigorously stirred at room temperature, and 1000 ml of 0.4 mol
Na2SiO3¡¤9H2O solution was added dropwise over 40~60 min to produce a white
precipitate. After stirring for 12 h, the precipitate was filtered, and washed three
times with distilled water followed by one-time wash with ethanol. The white
precipitate was dried at 80 C overnight and calcined at 800 C for 2 h to obtain ¦Â-CS
powders. Then, the obtained ¦Â-CS powders were uniaxially pressed into disks under
a pressure of 10 MPa. Subsequently, they were sintered in air at 1070 C for 3 h. After
sintering, the disks were triturated and sieved to obtain ¦Â-CS particulates with a size
of 150~300 mm.¡ª¡ªÒý×Ôһƪ2013ÄêµÄbiomaterials¡£
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