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Mechanism of the solid-state transformation of a calcium-deficient hydroxyapatite (CDHA) into biphasic calcium phosphate (BCP) at elevated temperaturesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Dorozhkina E.I., Dorozhkin S.V.
- Журнал: Chemistry of Materials
- Том: 14
- Номер: 10
- Год издания: 2002
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 4267
- Последняя страница: 4272
- DOI: 10.1021/cm0203060
- Аннотация: Three types of poorly crystallized calcium-deficient hydroxyapatites (CDHA) with Ca/P molar ratios 1.50, 1.58, and 1.67 were prepared from CaHPO4.2H(2)O and KOH. These were sintered at 1050 degreesC for 4 h. Well-crystallized beta-tricalcium phosphate (beta-TCP), biphasic calcium phosphate (BCP), and stoichiometric hydroxyapatite (HA) were produced, respectively. The sintered and unsintered calcium phosphates were studied by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. In addition, Ca/P molar ratios were determined by a chemical analysis. Thermogravimetric analysis (TGA) revealed a loss of water for the period of sintering. On the basis of the experimental data, a structure of BCP was suggested. After applying the numerical values of ionic (OH-, Ca2+, and PO43-) diffusion coefficients at 1000 degreesC, the solid-state transformation mechanism of CDHA into BCP was proposed.
- Добавил в систему: Дорожкин Сергей Вениаминович