کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
12721 814 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ultrastructural observation of single-crystal apatite fibres
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Ultrastructural observation of single-crystal apatite fibres
چکیده انگلیسی

Hydroxyapatite (HAp) has been widely used as a biomaterial for substituting human hard tissues such as bone. By altering the morphology of HAp crystals, novel properties may be produced by controlling the orientation of the crystal planes. Apatite fibres were successfully synthesized by precipitation from aqueous solutions containing Ca(NO3)2, (NH4)2HPO4, urea and HNO3. The products were composed of carbonate-containing apatite fibres with preferred orientation along the {h00} planes. Examination of individual fibres using transmission electron microscopy showed that the as-synthesized apatite fibres were highly strained single crystals with the c-axis orientation parallel to the long axis of the fibre. The crushed fibres consisted of domains that were preferentially oriented with the c-axis parallel to the long axis of the fibres. When the apatite fibres were heated to 800, 1000 and 1200 °C for 1 h, the domains were removed and grain boundaries, dislocations and voids were formed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomaterials - Volume 26, Issue 17, June 2005, Pages 3427–3433
نویسندگان
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