The Properties of Sintered Calcium Phosphate with [Ca]/[P] = 1.50

International Journal of Molecular Sciences

I-Ming Hung³  Wei-Jen Shih²  Min-Hsiung Hon¹ 

[1]Department of Materials Science and Engineering, National Cheng Kung University, 1 Ta–Hsueh Road, Tainan 70101, Taiwan

[2] E-Mail:

[3]Metal Industries Research and Development Centre, 1001 Kaonan Highway, Kaohsiung 81160, Taiwan

[4] E-Mail:

[5]Yuan Ze Fuel Cell Center, Department of Chemical Engineering and Materials Science, Yuan Ze University, No. 135, Yuan-Tung Road, Chungli, Taoyuan 320, Taiwan

[6] E-Mail:

关键词: sintered;    calcium phosphate;    hydroxyapatite;    density;    hardness;    microstructure;   

DOI  :  10.3390/ijms131013569

来源: mdpi

【 摘 要 】

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 (Ca₁₀(PO₄)₆(OH)₂, HA) still maintained the major phase, accompanied with the rhenanite (NaCaPO₄) as the secondary phase and β-tricalcium phosphate (β-Ca₃(PO₄)₂, β-TCP) as the minor phases. In addition, the HA partially transformed to α-tricalcium phosphate (α-Ca₃(PO₄)₂, α-TCP) and tetracalcium phosphate (Ca₄(PO4)₂O, 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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.