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SURFACE MORPHOLOGIES ON THE ADDITION OF TiO₂ TO CALCIUM PHOSPHATE BIO-GLASS

Department of Materials and Mineral Resources, National Taipei University of Technology, Taiwan

Corresponding author: Wen C. Say, Department of Materials and Mineral Resources, National Taipei University of Technology, Taiwan, ROC.

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Chin C. Yeh

Department of Materials and Mineral Resources, National Taipei University of Technology, Taiwan

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, and

Chih-Hwa Chen

Department of Orthopaedic Surgery Chang Gung Memorial Hospital, Keelung College of Medicine, Chang Gung University, Keelung, Taiwan

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https://doi.org/10.4015/S1016237207000495Cited by:0 (Source: Crossref)

Abstract

Titanium dioxide is added into calcium phosphate bio-glass (CPG) to have crystalline phases of titanium phosphoric (TiP₂O₇) and calcium phosphoric (CaP₂O₇) on its surfaces. The bio-glass synthesis with the addition of titanium dioxide herein is denoted as TCPG. To elucidate their surface morphologies, both specimens of CPG and TCPG were immersed in Hanks' solution for two days before soaking in the mixed solutions of (NH₄)₂HPO₄ and Ca(NO₃)₂ at 70°. Crystalline layers of titanium phosphoric were observed on the surfaces of TCPG from immersing in Hanks' solution. After which calcium pyrophosphate appeared on the second step of soaking process from the calcium ion contained solutions. Due to the absence of crystalline phases on the surfaces of CPG specimen, it can be deduced that the addition of titania (TiO₂) causes the hydroxyapatite formation on the surface of bio-glass.

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