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  • amorphous calcium phosphates synthesized by precipitation from calcium d-gluconate solutions

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1001
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the amorphous calcium phosphates were synthesized by the precipitation from non-toxic calcium d-gluconate precursor solutions. the low number of nanosized well-ordered calcium deficient hydroxyapatite clusters separated with amorphous calcium phosphate matrix was found at short aging times. the content of intramolecular water in aggregates decreased with an amount of well-ordered clusters and maturation time. the majority α-tricalcium phosphate phase and calcium deficient calcium phosphate were formed after annealing of samples with a high volume fraction of amorphous matrix and nanocrystalline apatite-like phase respectively. the very fine nanocrystalline calcium deficient hydroxyapatite was intermediate phase during thermal transformation to the final β-tricalcium phosphate. the rise of disaggregation of coarse particles to smaller well-ordered hydroxyapatite clusters with aging time was verified. the different amount and size of nanocrystalline clusters were responsible for the formation of various calcium phosphate phases after thermal treatment.

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