采用XRD实时分析方法 ,研究了磷酸钙骨水泥水化过程中反应物磷酸四钙 (TetCP)和二水磷酸氢钙(DCPD)的消失过程 ,以及生成物羟基磷灰石 (OHAp)的形成过程。结果表明 ,DCPD比TetCP溶解速度快而先耗尽 ,水化反应的速度受TetCP控制 ,水化产物的主晶相为细晶OHAp。方法简单易行 ,合理可靠 ,能够准确实时体现水化反应的动态过程 The disappearance of the reactants TetCP and DCPD and the formation of hydroxyapatite (OHAp) during the hydration process of calcium phosphate cement were studied by XRD method. . The results showed that DCPD was faster than TetCP before it was consumed, and the rate of hydration reaction was controlled by TetCP. The main phase of hydration product was fine crystalline OHAp. The method is simple, reasonable and reliable, and can accurately reflect the dynamic process of hydration reaction in real time