Effect of Particle Size on Carbonate Apatite Cement Properties Consisting of Calcite (or Vaterite) and Dicalcium Phosphate Anhydrous
Effect of Particle Size on Carbonate Apatite Cement Properties Consisting of Calcite (or Vaterite) and Dicalcium Phosphate Anhydrous
复制标题
粒径对方解石（或球霰石）和无水磷酸氢钙组成的碳酸盐磷灰石水泥性能的影响
DOI：
10.4028/www.scientific.net/kem.631.128
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
K. Ishikawa
中科院分区：
文献类型：
--
作者：
Arief Cahyanto;R. Toita;K. Tsuru;K. Ishikawa
碳酸钙（CaCO3）被认为是碳酸盐磷灰石（CO3Ap）水泥的成分之一。方解石是CaCO3的多晶型物之一，具有粒径大、稳定性好的特点。相反，球霰石具有小粒径和亚稳相。为了揭示粒度对CO3Ap水泥性能的影响，本研究研究了不同粒度的球霰石；来自球霰石的方解石，其粒径和形状与球霰石几乎相似；接地方解石和未接地方解石。将方解石或球霰石与无水磷酸二钙 (DCPA) 组合的粉末相与 0.8 mol/L Na2HPO4 溶液以 0.45 的液粉比混合。将糊状物装入分体不锈钢模具中，盖上载玻片并在37℃和100%相对湿度下保持一段时间。 XRD和FT-IR分析表明，由球霰石和DCPA组成的CO3Ap水泥在72小时内转化为纯B型CO3Ap，而由不同粒径的方解石组成的CO3Ap水泥直到240小时才完全转化为CO3Ap。我们得出的结论是，由具有小粒径和亚稳相特性的球霰石组成的 CO3Ap 水泥作为起始材料更有效，因为它能快速转化为 CO3Ap。
Calcium carbonate (CaCO3) has been known as one of the components of carbonate apatite (CO3Ap) cement. Calcite is one of the polymorph of CaCO3 with big particle size and excellent stability. In contrast, vaterite has small particle size and a metastable phase. To discover the effect of particle size on the properties of CO3Ap cement, this study investigated the different particle size of vaterite; calcite from vaterite, which has almost similar particle size and shape with vaterite; grounded calcite and ungrounded calcite. The powder phase of calcite or vaterite combined with dicalcium phosphate anhydrous (DCPA) was mixed with 0.8 mol/L of Na2HPO4 solution in 0.45 liquid to powder ratio. The paste was packed into a split stainless steel mold, covered with glass slide and kept at 37°C and 100% relative humidity for a period of time. XRD and FT-IR analysis revealed that CO3Ap cement consisted of vaterite and DCPA transformed to pure B-type CO3Ap in 72 hours while CO3Ap cement that consisted of calcite with different particle size was not completely transformed to CO3Ap even until 240 hours. We concluded that CO3Ap cement consisted of vaterite with small particle size and metastable phase properties is more effective as starting material due to its fast transformation to CO3Ap.