Infrared Spectroscopy Studies of Magnesium Aluminates Spinel Crystals

Abstract:

The reflectance and transmittance spectra for magnesium aluminates spinel single crystals MgO•nAl2O3 and ceramics in the IR spectral range were measured to investigate the nature of vibration modes of constituent ions and incorporated hydrogen. Besides of the earlier observed bands at 545, 710, and 835 cm-1 we registered also two bands 1440 and 1670 cm-1 in single crystals grown by different methods and in spinel optical ceramics. The existence of these bands was supported by measurements of non-stoichiometric spinel crystals and crystals doped with transition metals. The variation of intensity of registered bands in spinel of stoichiometric and non-stoichiometric compositions and spinel ceramics was interpreted in terms of vibration modes of divalent and trivalent cations in different coordination, particularky, at the spatially correlated anti-site defects.

• Periodical: Solid State Phenomena (Volume 200)
• Pages: 209-214
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.200.209
• Online since: April 2013
• Authors: Volodymyr A. Kobyakov, Oksana L. Patochkina, Vasyl T. Gritsyna
• Keywords: Ceramic, Crystals, Infrared Absorption, Magnesium-Aluminate Spinel, Reflectivity, Vibration Spectra

References

[1] M.E. Striefler, S.I. Boldish, Transverse and longitudinal optic frequencies of spinel MgAl2O4, J. Phys. C: Solid State Phys. 11 (1978) L237-241.

DOI: 10.1088/0022-3719/11/7/002

[2] M. Ishi, J. Hiraishi, T. Yamanaka, Structure and lattice vibrations of Mg-Al spinel solid solutions, Phys. Chem. Minerals 8 (1982) 64-68.

DOI: 10.1007/bf00309015

[3] P. Thibaudeau, F. Gervais, Ab initio investigation of phonon models in the MgAl2O4 spinel, J. Phys.: Condens. Matter 14 (2002) 3543-3552.

DOI: 10.1088/0953-8984/14/13/312

[4] Q. Zeng, L. Zhang, Xian Zhang, Q. Chen, Z. Feng, Y. Cai, L. Cheng, Z. Weng, Vibrational and dielectric properties of magnesium aluminate spinel: A first-principles study, Phys. Lett. A 375 (2011) 3521-3524.

DOI: 10.1016/j.physleta.2011.08.020

[5] D. Fabian, Th. Posch, H. Mutschke, F. Kerschbaum, J. Dorschner, Infrared optical properties of spinels, A&A 373 (2001) 1125-1138.

DOI: 10.1051/0004-6361:20010657

[6] X. Duan, D. Yuan, C. Luan, Z. Sun, D. Xu, M. Lv, Microstructural evolution of transparent glass-ceramics containing Co2+: MgAl2O4 nanocrystals, J. Non-Cryst. Solids 328 (2003) 245-249.

DOI: 10.1016/j.jnoncrysol.2003.08.045

[7] S. Kurien, S. Sebastian, J. Mathew, K.C. George, Structural and electrical properties of nano-sized magnesium aluminate, Indian J. Pure & Appl. Phys. 42 (2004) 926-933.

[8] V.T. Gritsyna, I.V. Afanasyev-Charkin, Yu.G. Kazarinov, K.E. Sickafus, Optical transitions in magnesium aluminates spinel crystals of different compositions exposed to irradiation. Nucl. Instr. Methods B218 (2004) 264-270.

DOI: 10.1016/j.nimb.2004.02.002

[9] V.T. Gritsyna, Yu.G. Kazarinov, V.A. Kobyakov, I.E. Reimanis, Radiation induced luminescence in magnesium aluminates spinel crystals of different origin. Nucl. Instr. Methods B250 (2006) 349-353.

DOI: 10.1016/j.nimb.2006.04.135

[10] N.Fukatsu, N. Kurita, H. Shiga, Y. Murai, T. Ohashi, Incorporation of hydrogen into magnesium aluminate spinel, Solid State Ionics 152-153 (2002) 809-812.

DOI: 10.1016/s0167-2738(02)00332-6

[11] Y. Oruyama, N. Kurita, N. Fukatsu, Defect structure of alumina-rich nonstoichiometric magnesium aluminate spinel, Solid State Ionics 177 (2006) 59-64.

DOI: 10.1016/j.ssi.2005.09.013

[12] A. Benerjee, S. Das, S. Misra, S. Mukhopadhyay, Structural analysis on spinel (MgAl2O4) for application in spinel bonded castables, Ceram. Int. 35 (2009) 381-390.

DOI: 10.1016/j.ceramint.2007.11.009