کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1462654 989636 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of octacalcium phosphate with incorporated succinate and suberate ions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Synthesis of octacalcium phosphate with incorporated succinate and suberate ions
چکیده انگلیسی
Octacalcium phosphate (OCP) has a layered structure composed of apatitic and hydrated layers. HPO42− in the hydrated layer can be substituted by dicarboxylate ions. The synthesis of octacalcium phosphate with incorporated dicarboxylate ions (octacalcium phosphate carboxylate, OCPC), was investigated through the effects of the initial concentration of dicarboxylic acid on the formation of OCPC. Succinic acid (Suc) and suberic acid (Sub) were used as dicarboxylic acids for preparing OCPC, and crystalline phases of the products were characterized by powder X-ray diffraction (XRD). When the amount of added dicarboxylic acid was 1-5 times the amount corresponding to the stoichiometric composition of OCPC, incorporation of dicarboxylate ions progressed with increasing amount of added dicarboxylic acids, although OCP without incorporated dicarboxylate ions was also present. When the amounts of added Suc and Sub were larger than 10 times the stoichiometric amount in OCPC, a single OCPC phase was detected in the powder XRD patterns. Amounts of Suc and Sub greater than 10 times the stoichiometric amounts facilitated formation of the OCPCs and inhibited formation of OCP. The incorporation of dicarboxylate ions into OCP competes with incorporation of HPO42−. Hence a high concentration of dicarboxylic acids is required for complete incorporation of dicarboxylate ions in OCP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 38, Issue 5, July 2012, Pages 3815-3820
نویسندگان
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