TY - JOUR
T1 - Formation of needle-like hydroxyapatite by hydrothermal treatment of CaHPO4·2H2O combined with β-Ca 3(PO4)2
AU - Watanabe, Tomoko
AU - Kawachi, Giichiro
AU - Kamitakahara, Masanobu
AU - Kikuta, Koichi
AU - Ohtsuki, Chikara
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2009/6
Y1 - 2009/6
N2 - 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.
AB - 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.
KW - Dicalcium phosphate dihydrate
KW - Hydrothermal processing
KW - Hydroxyapatite
KW - Needle-shaped crystal
KW - Tricalcium phosphate
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U2 - 10.2109/jcersj2.117.759
DO - 10.2109/jcersj2.117.759
M3 - Article
AN - SCOPUS:67649970764
VL - 117
SP - 759
EP - 764
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
SN - 1882-0743
IS - 1366
ER -