Eurotron Conference   EPS-12 Conference

Processing and magnetic properties of bioceramics

Th. Leventouri, A.C. Kis, K. Sorge1, C. E. Bunaciu, and J. R. Thompson1

Physics Department, Florida Atlantic University, Boca Raton, FL 33431, USA
1Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830-6061, U.S.A, and
Department of Physics, University of Tennessee, Knoxville, TN 37996-1200, U.S.A.

Bioactivity of ferromagnetic glass-ceramics originates from the calcium phosphate that forms apatite in a physiological environment. Their magnetic properties have been shown to be effective in hyperthermic treatment of animal bone cancer. Correlations between processing, structure, and magnetic properties are presented. A series of samples in the system 45(CaO, P2O5) ySiO2 xFe2O3 were synthesized with varying the processing parameters. X-ray powder diffraction reveals a strong effect of the processing parameters on the qualitative and the quantitative composition of the samples. They all are multiphase systems of 3 or 4 phases. The major phase is calcium phosphate, while hematite and/or magnetite determine their magnetic properties. Magnetic measurements illustrate a strong dependence of the saturation magnetization and hysteresis loss of the biomaterial from the processing parameters. A systematic study of the physical properties in series of ferromagnetic bioceramics is in progress.

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