Structure of Yttrium Aluminium Garnet Obtained by the Glycothermal Method

Abstract:

The reaction of a stoichiometric mixture of aluminium isopropoxide and yttrium acetate in 1,4-butanediol (1,4-BG) at 300 °C directly yielded crystalline yttrium aluminium garnet (YAG), while the reaction in ethylene glycol (EG) afforded an amorphous product in which a large amount of EG moieties remained. The latter product exhibited an exothermic peak due to the crystallization of YAG at around 900 °C and single-phase YAG was obtained by calcination at 1000 °C. The YAG sample directly obatained in 1,4-BG had a large unit cell parameter (12.144 Å), whereas the YAG sample obtained by the latter method had a unit cell parameter (12.015 Å) essentially identical with the value (12.01 Å) reported in the JCPDS card. Rietveld analysis indicates that the former crystals had Al vacancies at 24d sites and oxygen vacancies while the latter was essentially free from these vacancies.

• Periodical: Advances in Science and Technology (Volume 45)
• Pages: 691-696
• DOI: https://doi.org/10.4028/www.scientific.net/AST.45.691
• Online since: October 2006
• Authors: Saburo Hosokawa, Yusuke Tanaka, Shinji Iwamoto, Masashi Inoue
• Keywords: Defect Structure, Glycothermal Method, Rietveld Analysis, Y₃Al₅O₁₂

References

[1] G. Xia, S. Zhou, J. Zhang, S. Wang, Y. Liu and J. Xu: J. Cryst. Growth Vol. 283 (2005), p.257.

[2] M. Nishi, S. Tanabe, M. Inoue, M. Takahashi, K. Fujita and K. Hirao: Opt. Mater. Vol. 27 (2005), p.655.

[3] I. Warshaw and R. Roy: J. Am. Ceram. Soc. Vol. 42 (1959), p.434.

[4] J. S. Abell, I. R. Harris, B. Cockayne and B. Lent: J. Mater. Sci. Vol. 9 (1974), p.527.

[5] X. Guo, P. S. Devi, B. G. Ravi, J. B. Parise, S. Sampath and J. C. Hanson: J. Mater. Chem. Vol. 14 (2004), p.1288.

[6] H. M. Wang, M. C. Simmonds, Y. Z. Huang and J. M. Rodenburg: Chem. Mater. Vol. 15 (2003), p.3474.

[7] X. Li, H. Liu, J. Wang, X. Zhang and H. Cui: Opt. Mater. Vol. 25 (2004), p.407.

[8] M. Inoue, T. Nishikawa, T. Nakamura and T. Inui: J. Am. Ceram. Soc. Vol. 80 (1997), p.2157.

[9] M. Inoue, T. Nishikawa, H. Otsu, H. Kominami and T. Inui: J. Am. Ceram. Soc. Vol. 81 (1998), p.1173.

[10] M. Inoue: J. Phys.: Condens. Matter Vol. 16 (2004), p. S1291.

[11] M. Inoue, H. Otsu, H. Kominami and T. Inui: J. Am. Ceram. Soc. Vol. 74 (1991), p.1452.

[12] T. Takamori and L. D. David: Am. Ceram. Soc. Bull. Vol. 65 (1986), p.1282.

[13] Y. Hakuta, K. Seino, H. Ura, T. Adschiri, H. Takizawa and K. Arai: J. Mater. Chem. Vol. 9 (1999), p.2671.

[14] M. Inoue, T. Nishikawa and T. Inui: J. Mater. Sci. Vol. 33 (1998), p.5835.

[15] X. Li, H. Liu, J. Wang, H. Cui and F. Han: Mater. Res. Bull. Vol. 39 (2004), p. (1923).

[16] F. Izumi and T. Ikeda: Mater. Sci. Forum Vol. 321-324 (2000), p.198.

[17] M. Inoue, H. Kominami and T. Inui: Nippon Kagaku Kaishi (1991), p.3331.

[18] I. F. Guilliat and N. H. Brett: J. Mater. Sci. Vol. 5 (1970), p.615.