Universidad Autónoma Metropolitana Unidad Xochimilco, Calzada del Hueso 1100, Colonia Villa Quietud, Coyoacán, México D.F., Mexico.
Ultrason Sonochem. 2013 May;20(3):948-54. doi: 10.1016/j.ultsonch.2012.10.019. Epub 2012 Nov 16.
Brushite was synthesized by precipitation of calcium chloride (CaCl(2)) and sodium phosphate monobasic (Na(2)HPO(4)) dried in vacuum and monetite was obtained from this brushite by sonication with a frequency of 90kHz at 500W for 90min. Monetite itself was also transformed in Ca(H(2)PO(4))(2)·H(2)O, monocalcium phosphate monohydrate (MCPM), by sonication with a frequency of 90kHz at 500W for 60min followed by lyophilization. The MCPM was sonicated and lyophilized by three times more until reach over 240min, but any other phase transformation was observed. All these phase transformations were analyzed by X-ray diffraction (XRD) and infrared spectroscopy (FTIR). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicated a grain size of about 200nm in all the samples. The morphology observed was a corn-flake-like grain for brushite, a pseudo-needle-like grains for monetite, and lamellar-like grains for MCPM.
brushite 通过氯化钙 (CaCl(2)) 和磷酸一氢钠 (Na(2)HPO(4)) 的沉淀合成，将所得 brushite 在 90kHz、500W 下超声处理 90min，得到磷酸氢钙二水合物 (Ca(H(2)PO(4))(2)·H(2)O) 和单水磷酸二氢钙 (MCPM)。单水磷酸二氢钙也通过在 90kHz、500W 下超声处理 60min 后冻干，再进行三次超声处理和冻干，直至总时间达到 240min 以上，但未观察到任何其他相转变。所有这些相转变都通过 X 射线衍射 (XRD) 和红外光谱 (FTIR) 进行了分析。扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 表明，所有样品的晶粒尺寸约为 200nm。在 brushite 中观察到的形态是玉米片状颗粒，在 monetite 中观察到的形态是伪针状颗粒，在 MCPM 中观察到的形态是层状颗粒。
