title: The properties of sintered calcium phosphate with [Ca]/[P] = 1.50.
abstract: In order to obtain the properties of the sintered as-dried calcium phosphate with [Ca]/[P] = 1.50, the characteristics of sintered pellets have been investigated using X-ray diffraction (XRD), inductively coupled plasma-mass spectrometry (ICP-MS), Fourier-transform infrared (FT-IR) spectra, Vickers hardness indentation and scanning electron microscopy (SEM). When the pellet samples were sintered between 700 °C and 1200 °C for 4 h, the hydroxyapatite (Ca(10)(PO(4))(6)(OH)(2), HA) still maintained the major phase, accompanied with the rhenanite (NaCaPO(4)) as the secondary phase and β-tricalcium phosphate (β-Ca(3)(PO(4))(2), β-TCP) as the minor phases. In addition, the HA partially transformed to α-tricalcium phosphate (α-Ca(3)(PO(4))(2), α-TCP) and tetracalcium phosphate (Ca(4)(PO4)(2)O, TTCP), when the pellet samples were sintered at 1300 °C and 1400 °C, respectively, for 4 h. The maximum density and Vickers Hardness (HV) of sintered pellet samples were 2.85 g/cm3 (90.18% theoretical density (T.D.)) and 407, which appeared at 1200 °C and 900 °C, respectively.
authors.affiliation: Yuan Ze Fuel Cell Center, Department of Chemical Engineering and Materials Science, Yuan Ze University, No. 135, Yuan-Tung Road, Chungli, Taoyuan 320, Taiwan. mcwang@kmu.edu.tw.
authors.forename: I-Ming
authors.initials: IM
authors.lastname: Hung
authors.forename: Wei-Jen
authors.initials: WJ
authors.lastname: Shih
authors.forename: Min-Hsiung
authors.initials: MH
authors.lastname: Hon
authors.forename: Moo-Chin
authors.initials: MC
authors.lastname: Wang
mesh_terms: D002130:Calcium Phosphates / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry; D006245:Hardness Tests; D006358:Hot Temperature; D013058:Mass Spectrometry; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D002130:Calcium Phosphates; C485830:tetracalcium phosphate; D017886:Durapatite; C020243:calcium phosphate