Preparation of porous Ca-10(PO4)(6)(OH)(2) and beta-Ca-3(PO4)(2) bioceramics

Engin, NO
Tas, AC
Submicrometer-sized, pure calcium hydroxyapatite (HA, (Ca-10(PO4)(6)(OH)(2))) and eta-tricalcium phosphate (beta-TCP, Ca-3(PO4)(2)) bioceramic powders, that have been synthesized via chemical precipitation techniques, were used in the preparation of aqueous slurries that contained methyl cellulose to manufacture porous (70%-95% porosity) HA or beta-TCP ceramics. The pore sizes in HA bioceramics of this study were 200-400 mu m, whereas those of beta-TCP bioceramics were 100-300 mu m. The pore morphology and total porosity of the HA and beta-TCP samples were investigated via scanning electron microscopy, water absorption, and computerized tomography.


Synthesis of biomimetic Ca-hydroxyapatite powders at 37 degrees C in synthetic body fluids
Tas, AC (2000-07-01)
An important inorganic phase for synthetic bone applications, calcium hydroxyapatite (HA, Ca-10(PO4)(6)(OH)(2)), was prepared as a nano-sized (similar to 50 nm), homogeneous and high-purity ceramic powder from calcium nitrate tetrahydrate and diammonium hydrogen phosphate salts dissolved in modified synthetic body fluid (SBF) solutions at 37 degrees C and pH of 7.4 using a novel chemical precipitation technique. The synthesized precursors were found to easily reach a phase purity >99% after 6 h of calcinati...
Preparation, modification, and characterization of acrylic cements
Basgorenay, B; Ulubayram, K; Serbetci, K; Onurhan, E; Hasırcı, Nesrin (2006-03-15)
Acrylic cements with different compositions were prepared by mixing the solid part (composed of poly(methyl methacrylate), PMMA, and benzoyl peroxide, BPO) and the liquid part (composed of methyl methacrylate, MMA, and N,N-dimethyl-p-toluidine, DMPT), modified by addition of hydroxyapatite (HA) and ammonium nitrate (AN) and characterized by measuring thermal and mechanical properties. Three sets of samples were prepared. For B-group, the total amount of solid including HA was constant but the PMMA to HA rat...
Fabrication and characterization of porous hydroxyapatite and biphasic calcium phosphate ceramic as bone substitutes
Koc, N; Timucin, M; Korkusuz, Feza (2004-01-01)
In the present study, the calcium phosphate powders (HAP, HAP-TCP) were produced by a precipitation technique involving the use of aqueous solutions of calcium nitrate and diammonium hydrogen phosphate. Preforms of calcium phosphate ceramics were produced by using a modified slip casting technique. Porosity in the cast and in the sintered ceramic was obtained through custom made PMMA beads similar to200-300 mum size. The green ceramic samples were prepared by suspending the apatite powder and PMMA beads in ...
Synthesis and characterization of aluminoborophosphate compounds by hydrothermal and solid-state methods
Karabıçak, Seher; Kızılyallı, Meral; Department of Chemistry (2004)
The hydrothermal and solid state methods were used in the synthesis of some aluminoborophosphate compounds. The products were investigated by using XRD, IR, DTA, DSC, ICP and SEM methods. The solid state reactions have been studied in the range 700 ا 1200?C. Using several hydrothermal methods a novel aluminum phosphate compound Al3-xBxP3O12 was synthesized. The crystal system was found to be tetragonal with a=17.1629 and c = 12.6084A° unit cell parameters and space group is P4212 (No:90). In anorthite miner...
Preparation and Characterization of Mixed Halide MAPbI(3-x)Cl(x) Perovskite Thin Films by Three-Source Vacuum Deposition
Babaei, Azin; Soltanpoor, Wiria; Tesa-Serrate, Maria A.; Yerci, Selçuk; Sessolo, Michele; Bolink, Henk J. (2020-04-01)
Chloride is extensively used in the preparation of metal halide perovskites such as methylammonium lead iodide (MAPbI(3-x)Cl(x)), but its persistence and role in solution-processed materials has not yet been rationalized. Multiple-source vacuum deposition of perovskites enables a fine control over thin-film stoichiometry and allows the incorporation of chemical species irrespective of their solubility. Herein, the first example of mixed MAPbI(3-x)Cl(x) thin films prepared by three-source vacuum deposition i...
Citation Formats
N. Engin and A. Tas, “Preparation of porous Ca-10(PO4)(6)(OH)(2) and beta-Ca-3(PO4)(2) bioceramics,” JOURNAL OF THE AMERICAN CERAMIC SOCIETY, pp. 1581–1584, 2000, Accessed: 00, 2020. [Online]. Available: