Formation of needle-like hydroxyapatite by hydrothermal treatment of CaHPO4·2H2O combined with β-Ca3(PO4)2
Formation of needle-like hydroxyapatite by hydrothermal treatment of CaHPO4·2H2O combined with β-Ca3(PO4)2
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CaHPO4·2H2O与β-Ca3(PO4)2水热处理形成针状羟基磷灰石
DOI：
10.2109/jcersj2.117.759
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发表时间：
2009
影响因子：
1.1
通讯作者：
C. Ohtsuki
中科院分区：
文献类型：
--
作者：
Tomoko Watanabe;Giichiro Kawachi;M. Kamitakahara;K. Kikuta;C. Ohtsuki
研究了二水磷酸二钙(DCPD;CaHPO4·2H2O)和β-磷酸三钙(β-TCP;β-Ca3(PO4)2)混合磷酸钙粉末水热处理制备针状羟基磷灰石(HAp;Ca10(PO4)6(OH)2)的条件。对粉末混合物进行两步水热处理，其中首先通过暴露于液体蒸气并随后浸没在液体中来处理压实的粉末。反应物质量比为 β-TCP/DCPD = 1/9 的样品，通过在蒸汽条件下于 160°C 处理 0.5 小时，然后在液体条件下处理 24 小时并在 12 小时更新液体，获得了晶体尺寸长度约为 60 μm 的样品的高长径比。初始组成和pH条件是决定水热处理形成针状HAp的主要参数。
Conditions were investigated for preparing needle-like hydroxyapatite (HAp; Ca10(PO4)6(OH)2) by hydrothermal processing of mixed calcium phosphate powders consisting of dicalcium phosphate dihydrate (DCPD; CaHPO4·2H2O) and beta-tricalcium phosphate (β-TCP; β-Ca3(PO4)2). The powder mixture was subjected to two-step hydrothermal processing in which the compacted powder was treated first by exposure to vapor of the liquid and subsequently by immersion in the liquid. High aspect ratios were obtained in samples with crystal sizes around 60 μm in length from the reactant mass ratio composition of β-TCP/DCPD = 1/9 by treatment at 160°C for 0.5 h under vapor conditions, followed by liquid conditions for 24 h with renewal of the liquid at 12 h. Initial compositions and pH conditions were the main parameters determining the formation of needle-like HAp by hydrothermal processing.