Paper Title:
Electrovector Effect of Polarized and Chemically Treated Na2O-CaO-P2O5-SiO2-Al2O3 Bioglasses
  Abstract

Na2O-CaO-P2O5-SiO2-Al2O3 (NCPSA) glass was investigated in its electrical polarizability by complex impedance and thermally stimulated depolarization current (TSDC) measurements. Moreover, the NCPSA glass was also subjected to a chemical treatment for bioactivity improvement. The effects of the electrical polarization and the chemical treatment on apatite formability of NCPSA glass were investigated by immersion test using simulated body fluid. From the result of complex impedance measurements, the activation energies for electrical conductivities NCPSA glass was 1.1eV. From the TSDC measurements, the polarized NCPSA glass showed monotonically increasing curves in depolarization current density spectra. The stored electrical charge calculated from TSDC measurements of the NCPSA glass polarized with electrical dc field of 2kV・cm-1 at 600°C for 1h was 4.91 mC・cm-2. The NCPSA glass treated with 1M NaOH indicated apatite formability in SBF and exhibited bioactivity. We disclosed that the combination of electropolarization and chemical treatment changed the apatite formability of the NCPSA glass in SBF, consequently, improved the bioactivity of the glass.

  Info
Periodical
Key Engineering Materials (Volumes 309-311)
Main Theme
Edited by
Takashi Nakamura, Kimihiro Yamashita and Masashi Neo
Pages
337-340
DOI
10.4028/www.scientific.net/KEM.309-311.337
Citation
T. Sasaki, M. Kobayashi, S. Nakamura, K. Yamashita, "Electrovector Effect of Polarized and Chemically Treated Na2O-CaO-P2O5-SiO2-Al2O3 Bioglasses", Key Engineering Materials, Vols. 309-311, pp. 337-340, 2006
Online since
May 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hui Wang, Bang Cheng Yang, Qi Feng Yu, Dayi Wu, Xing Dong Zhang
Abstract:Titania ceramics is lack of bone-bonding ability even if it has excellent biocompatibility. Recently, it is even found that the nanophase...
171
Authors: Emiko Amaoka, Erik Vedel, Satoshi Nakamura, Yusuke Moriyoshi, Jukka I. Salonen, Kimihiro Yamashita
Abstract:We investigated the electrical polarizability of MgO and B2O3 containing bioactive glass (MBG). The MBG material with good manufacturing...
333
Authors: Shigeki Kishi, Norikazu Okimoto, Satoshi Nakamura, Keishi Nishio, Kazuaki Hashimoto, Yoshitomo Toda, Kimihiro Yamashita
Abstract:To produce ceramics with high mechanical strength and bioactivity, we developed the little amount of nano-sized hydroxyapatite (HA)-doped...
589
Authors: Yan Bao Li, Qing Lin, Jun Sheng Chen, Xiang Hui Lan, Chun Hua Lu, Dong Xu Li, Zhong Zi Xu
Abstract:The bioactivity of potassium titanate whiskers (PTW) was evaluated by soaking in simulated body fluids (SBF, Kokubo solution). At first, PTW...
1351
Authors: Ourania Menti Goudouri, Xanthippi Chatzistavrou, Eleana Kontonasaki, Nikolaos Kantiranis, Lambrini Papadopoulou, K. Chrissafis, Konstantinos M. Paraskevopoulos
Abstract:Thermal treatment of bioactive glasses can affect their microstructure and thus their bioactivity. The aim of this study was the...
131