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Research Article | Open Access

Magnetic glass-ceramics

Viorel SANDUa,*( )Mirela Sidonia NICOLESCUaVictor KUNCSERaRaluca DAMIANaElena SANDUb
National Institute of Materials Physics, Magurele 077125, Romania
“Horia Hulubei” National Institute of Nuclear Physics and Engineering, Magurele 077125, Romania
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We present the magnetic properties of magnetic glass ceramics obtained by crystallization of Fe containing borosilicate glass. Two types of nucleators have been used: Cr2O3 and P2O5. The role of the nucleators proved to be crucial in the size and morphology of the crystallites developed within glassy matrix as well in the magnetic response. The former stimulates the growth of regular single crystals uniformly dispersed within the matrix whereas the latter leads to the formation of grains made of tiny (30 nm), nanocrystals. The magnetic response depends on the amount of Fe ions left dispersed within glassy matrix as paramagnetic ions. Although P2O5 leads to the best structural magnetite, almost 42% of Fe ions are left dispersed in the matrix without magnetic interaction. In the case of Cr2O3, the paramagnetic Fe is decreased to 12% but structural deficiency in the occupancy of the Fe sites of magnetite is revealed by Mössbauer spectroscopy.


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Journal of Advanced Ceramics
Pages 138-143
Cite this article:
SANDU V, NICOLESCU MS, KUNCSER V, et al. Magnetic glass-ceramics. Journal of Advanced Ceramics, 2012, 1(2): 138-143.








Web of Science






Received: 19 December 2011
Accepted: 10 March 2012
Published: 08 September 2012
© The author(s) 2012