Ferrimagnetic glass-ceramics

FIGURE 14.1.26 X-ray photograph of rahhit tihial bone transplanted with bone tumor, 5 weeks after the transplantation, (a) No treatment, (b) A ferrimagnetic glass-ceramic pin was inserted into the medullary canal and placed under an alternating magnetic field for 30 min, 2 weeks after the transplantation. 

Sharma, K., Dixit, A., Singh, A., Jagannath, S., Bhattacharya, S., Prajapat, C. L., Sharma, P. K., Yusuf, S. M., Tyagi, A. K. Kothiyal, G. P. (2009). Preparation and studies on surface modifications of calcium-silico-phosphate ferrimagnetic glass-ceramics in simulated body fluid. Materials Science and Engineering, 29(7), 2226-33. 

Glass-ceramics, having ferrimagnetic properties, were developed by Le Bras (1976). The magnetic property was achieved on the basis of the precipitation of calcium ferrite in glasses. Therefore, iron oxides were incorporated into silicate glasses. The base glass was characterized by the composition in ... 

Therefore, if the iron-oxide content (sum of FeO and Fe203) is higher than 6 mol% and MgO is higher than 15 mol%, a ferrimagnetic and machinable glass-ceramic material may develop following an additional heat treatment of 1180 C for 60 min. The chemical composition is shown in Table 2-22 and the corresponding microstructure is demonstrated in Fig. 2-44. 

Reade R.F., "Method for Making Glass-Ceramics with Ferrimagnetic Surfaces," U.S. Pat. No. 4 083 709,1977. 

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