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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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Magnetic glass-ceramics

Show Author's information 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

Abstract

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.

Keywords:

glass ceramics, Fe3O4, Mössbauer spectroscopy, grain growth
Received: 19 December 2011 Accepted: 10 March 2012 Published: 08 September 2012 Issue date: June 2012
References(22)
[1]
Hoell A, Kranold R, Lembke U, et al. Structural investigation of ferrimagnetic particles formed by glass crystallization. Ber Bunsenges Phys Chem 1996, 100: 1646–1650.
[2]
Tanaka K, Nakahara Y, Hirao K, et al. Preparation and magnetic properties of glass-ceramics containing magnetite microcrystals in calcium iron aluminoborate system. J Magn Mag Mater 1997, 168: 203–212.
[3]
Mekki A, Ziq Kh A. Magnetic properties of a SiO2-Na2O-Fe2O3 glass and glass ceramic. J Magn Mag Mater 1998, 189: 207–13.
[4]
Kawashita M, Takaoka H, Kokubo T, et al. Preparation of magnetite-containing glass-ceramics in controlled atmosphere for hyperthermia of cancer. J Ceram Soc Japn 2001, 109: 39–44.
[5]
Woltz S, Hiergeist R, Görnert P, et al. Magnetite nanoparticles prepared by the glass crystallization method and their physical properties. J Magn Mag Mater 2006, 298: 7–13.
[6]
Abdel-Hameed SAM, Hessien MM, Azooz MA. Preparation and characterization of some ferromagnetic glass-ceramics contains high quantity of magnetite. Ceram Intern 2009, 35: 1539–1544.
[7]
Singh RK, Kothiyal GP, Srinivasan A. Magnetic and structural properties of CaO-SiO2-P2O5-Na2O-Fe2O3 glass ceramics. J Magn Mag Mater 2008, 320: 1352–1356.
[8]
Wisniewski W, Harizanova R, Völksch G, et al. Crystallisation of iron containing glass-ceramics and the transformation of hematite to magnetite. Cryst Eng Commun 2011, 13: 4025–4031.
[9]
Oda K, Yoshio T, Oka K-O, et al. Morphology and magnetic properties of BaFe12O19 particles prepared by the glass-ceramic method. J Mater Sci Lett 1985, 4: 876–879.
[10]
Sohn S-B, Choi S-Y, Shim I-B. Preparation of Ba-ferrite containing glass-ceramics in BaO-Fe2O3-SiO2. J Magn Mag Mater 2002, 239: 533–536.
[11]
Rezlescu E, Rezlescu L, Popa PD, et al. BaFe12O19 fine crystals dispersed in a glassy matrix: Magnetic and structural properties. Mater Sci Eng: A 2004, 375-377: 1269–1272.
[12]
Chen GJ, Jian LY, Chang YS, et al. Preparation and properties of barium ferrite microcrystal in B2O3-Bi2O3 glass. J Cryst Growth 2005, 277: 457–461.
[13]
de Araújo JH, Cabral FAO, Ginani MF, et al. Synthesis and magnetic properties of the SiO2-BaFe12O19 glass-ceramic composites. J Non-Cryst Solids 2006, 352: 3518–3521.
[14]
Müller R, Ulbrich C, Schüppel W, et al. Preparation and properties of barium-ferrite-containing glass ceramics. J Eur Ceram Soc 1999, 19: 1547–1550.
[15]
Klupsch Th, Steinbeiss E, Müller R, et al. Magnetic glass ceramics- preparation and properties. J Magn Mag Mater 1999, 196-197: 264–265.
[16]
Rezlescu N, Rezlescu L, Craus M L, et al. LiFe5O8 and BaFe12O19 fine particles crystallised in a glassy matrix. Cryst Res Technol 1999, 34: 829836.10.1002/(SICI)1521-4079(199908)34:7<829::AID-CRAT829>3.0.CO;2-G
[17]
Oda K, Yoshio T, Oka K-O. Magnetic properties of SrFe12O19 particles prepared by the glass-ceramic method. J Mater Sci Lett 1984, 3: 1007–1010.
[18]
Zaitsev DD, Kazin PE, Gravchikova EA, et al. Synthesis of magnetic glass ceramics containing fine SrFe12O19 particles. Mendeleev Commun 2004, 14: 171–173.
[19]
Blackburn WJS, Tilley BP. The magnetic properties of glass-ceramics in the CoO-Fe2O3-B2O3 system. J Mater Sci 1974, 9: 1265–1269.
[20]
Chen W, Zhu M, Gao R, et al. Magnetic properties and microstructure of HDDR isotropic Nd-Dy-Fe-Co-B bonded magnets with high coercivity. Sci China Ser A: Mathematics 2002, 45: 516–519.
[21]
Pal M, Brahma P, Chakravorty D, et al. Nanocrystalline nickel-zinc ferrite prepared by the glass-ceramic route. J Magn Mag Mater 1996, 164: 256–260.
[22]
Singh RK, Srinivasan A. Magnetic properties of glass-ceramics containing nanocrystalline zinc-ferrite. J Magn Mag Mater 2011, 323: 330–333.
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Publication history

Received: 19 December 2011
Accepted: 10 March 2012
Published: 08 September 2012
Issue date: June 2012

Copyright

© The author(s) 2012

Acknowledgements

This work was supported by the Romanian NASC under the Project EURATOM.

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