The following information was submitted:
Transactions: INTERNATIONAL JOURNAL of BIOLOGY and BIOMEDICAL ENGINEERING
Transactions ID Number: 20-565
Full Name: Dan Nicolae Ungureanu
Position: Ph.D. Candidate
Age: ON
Sex: Male
Address: Bd. Carol I, Nr. 2, 130024, Targoviste, Dambovita
Country: ROMANIA
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E-mail address: danungureanu2002@yahoo.com
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Title of the Paper: Thermal stability of chemically precipitated hydroxyapatite nanopowders
Authors as they appear in the Paper: Dan Nicolae Ungureanu, Nicolae Angelescu, Zorica Bacinschi, Elena Valentina Stoian, Cristiana Zizi Rizescu
Email addresses of all the authors: danungureanu2002@yahoo.com, nicolae.angelescu@yahoo.com, bacinschizorica@yahoo.com, elenastoian22@gmail.com, cristinar3@yahoo.com
Number of paper pages: 8
Abstract: In this paper we present a synthesis method for obtaining hydroxyapatite nanopowders by chemical precipitation. As the starting reagents, analytical grade Ca(OH)2, H3PO4 and NH4OH were used. The proposed method led to obtaining a hydroxyapatite with a high degree of crystallinity and purity. The crystallinity degree was great than 90%, in case of sample thermal treated at 1200 C. Also, the resulting hydroxyapatite powder exhibits an average crystallites size of about 28 to 47 nm, after heat treatment at 12000C. All hydroxyapatite nanopowder samples obtained were thermally stable up to 1200 C. The XRD patterns presented did not reveals the transformation of hydroxyapatite in secondary phases, such as: α – tricalcium phosphate, β – tricalcium phosphate, after heat treatment at 8000C and 1200 C. A small amounts of calcium oxide has been or CaO Moreover, the products was characterized by a good stoichiometry. The synthesized samples were characterized by X-ra!
y diffraction (XRD), Fourier transformed-infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and other techniques.
Keywords: Chemical recipitation, Hydroxyapatite, Thermal treatment, Scanning electron microscopy, X - ray methods
EXTENSION of the file: .pdf
Special (Invited) Session: Synthesis and Characterization of Hydroxyapatite Nanopowders by Chemical Precipitation
Organizer of the Session: 650-514
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