CaO-P2O5 class ceramics containing bioactive phases: Crystallisation and in vitro bioactivity studies

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Y. Zhang (Author) Other; Maria Ascensão Lopes (Author) FEUP; José Domingos Santos (Author) FEUP

Journal

Title: Bioceramics

Vol. 49

Pages: 643-646

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 4 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-001-16F

DOI: 10.4028/www.scientific.net/KEM.192-195.643

Abstract (EN): CaO-P2O5 glass ceramics were prepared using a two-step heat treatment of nucleation and crystal growth using TiO2 and Na2O as nucleating agents. X-ray diffraction analysis demonstrated that bioactive and bioresorbable crystalline phases were precipitated in the microstructure, depending upon the relative content of the additives and of the CaO/P2O5 ratio of the glass. Ca2P2O7 (beta -DCP) was the main crystalline phase however beta -Ca-3(PO4)(2) (beta -TCP), could also be formed by increasing the content of TiO2 and the CaO/P2O5 ratio. Na and Ti-containing phases, CaTi4(PO4)(6), and/or NaTi2(PO4)(3), could also be assigned in the XRD spectra, In vitro testing in simulated body fluid (SBF) has proved the in vitro bioactivity of these glass ceramics with the formation of Ca-deficient apatite crystals, as demonstrated by Scanning Electron Microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) analyses.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4