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Crystallization Behavior and Microstructure of Silica-Free 5K2O-45CaO-50P2O5 Bioglass

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Abstract

The crystallization behavior and microstructure of silica-free 5K2O-45CaO-50P2O5 (KCP) bioglass have been studied using differential thermal analysis (DTA), X-ray diffraction (XRD), scanning election microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED). The activation energy for the KCP bioglass crystallization is found to be 337.4 kJ/mol using a nonisothermal method. The crystalline phases of the glass surface determined by XRD are KCa(PO3)3, 4CaO·3P2O5, and β-Ca(PO3)2 when the KCP bioglass is crystallized at 903 K for 4 hours. The crystalline phase of the powder samples determined by XRD is β-Ca(PO3)2 when silica-free KCP glasses crystallized at 873 to 1073 K for 8 hours. Crystallization starts at the surface of the KCP bioglass and then proceeds toward the interior of the glass matrix. The morphology of β-Ca(PO3)2 is a fibrillar shape 20 to 180 nm in length and 17 to 20 nm in diameter, with an aspect ratio ranging from 1.0 to 10.6.

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  1. SHOWA is a registered trademark of Showa Chemical Industry Co. Ltd., Tokyo, Japan.

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  4. PerkinElmer is a registered trademark of PerkinElmer Inc., Waltham, MA.

  5. Rigaku is a registered trademark of Rigaku Co. Ltd., Tokyo, Japan.

  6. JEOL is a trademark of Japan Electron Optics Ltd., Tokyo.

  7. Links is a registered trademark of Oxford Instruments Inc., Oxford, UK.

  8. Hitachi is a registered trademark of Hitachi Co. Ltd., Tokyo, Japan.

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Acknowledgments

This work was supported by the National Science Council of Taiwan under Contract No. NSC89-2216-E-151-004, which is gratefully acknowledged. The authors sincerely thank Mr. H.Y. Yao for the assistance in TEM analysis and Professor M.P. Hung for discussion with regard to manuscript preparation.

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Authors and Affiliations

  1. Department of Fragrance and Cosmetic Science, Kaohsiung Medical University, Kaohsiung, 807, Taiwan, R.O.C.

    Moo-Chin Wang (Professor)

  2. Department of Materials Science and Engineering, National United University, Miaoli, 36003, Taiwan, R.O.C.

    You-Cheng Lai (Student) & Ping-Yu Shih (Professor)

  3. Metal Industries Research & Development Centre, Kaohsiung, 81160, Taiwan, R.O.C.

    Wei-Jen Shih (Engineer)

  4. Department of Materials Science and Engineering, I-Shou University, Dashu Township, Kaohsiung County, 840, Taiwan, R.O.C.

    Guo-Ju Chen (Associate Professor)

  5. Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University, Tainan, 70101, Taiwan, R.O.C.

    Wang-Long Li (Associate Professor)

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  1. Moo-Chin Wang
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  2. You-Cheng Lai
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  3. Wei-Jen Shih
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  4. Ping-Yu Shih
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Corresponding authors

Correspondence to Ping-Yu Shih or Wang-Long Li.

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Manuscript submitted April 20, 2009.

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Wang, MC., Lai, YC., Shih, WJ. et al. Crystallization Behavior and Microstructure of Silica-Free 5K2O-45CaO-50P2O5 Bioglass. Metall Mater Trans A 41, 297–307 (2010). https://doi.org/10.1007/s11661-009-0114-9

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  • DOI: https://doi.org/10.1007/s11661-009-0114-9

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