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Chemical gelation of cerium (III)-doped yttrium aluminium oxide spherical particles

Published online by Cambridge University Press:  03 March 2011

L.T. Su ,
A.I.Y. Tok ,
F.Y.C. Boey  and
J.L. Woodhead
L.T. Su
Affiliation:
School of Materials Science and Engineering, Nanyang Technology University, Singapore 639798
A.I.Y. Tok*
Affiliation:
School of Materials Science and Engineering, Nanyang Technology University, Singapore 639798
F.Y.C. Boey
Affiliation:
School of Materials Science and Engineering, Nanyang Technology University, Singapore 639798
J.L. Woodhead
Affiliation:
Advanced Material Resources (Europe) Ltd., Abingdon, United Kingdom, OX14 3YS
*
a) Address all correspondence to this author. e-mail: miytok@ntu.edu.sg
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Abstract

A novel low-temperature (900 °C) chemical gelation method was developed to synthesize spherical and nonagglomerated Ce3+-doped yttrium aluminum oxide particles (YAG:Ce3+). This represents a process with a much lower processing temperature than current solid-state reaction processes (1400 °C). Characterization of the particles via x-ray diffraction and thermoanalytical methods showed that calcination at 900 °C for 2 h allowed direct crystallization from the amorphous phase, inferring that this process allows homogeneous mixing and increased precursor reactivity. Electron microscopy results showed that the spherical particles (∼100 to ∼3 μm) were the flocks of crystallites. The crystallite sizes (Rietveld refinement) grew linearly from 27 nm (900 °C) to 114 nm (1300 °C). The surface area decreased from 40 m2/g (900 °C) to 5 m2/g (1300 °C) because of the coagulating and growing of crystallites to bigger grains at 1300 °C. Single-crystal nanoparticles (around 100 nm) were obtained with this process and their atomic structures were revealed via high-resolution transmission electron microscopy.

Keywords

Chemical synthesisCrystal growthOxide
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 10 , October 2006 , pp. 2510 - 2515
Copyright
Copyright © Materials Research Society 2006

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References

REFERENCES

1.Kingery, W.D., Bowen, H.K., Uhlmann, D.R.: Introduction to Ceramics, 2nd ed. (John Wiley & Sons, New York, 1976).Google Scholar
2.Hahn, T.: International Crystallography Table, 4th ed. (Kluwer Academic Publishers, Dordrecht, The Netherlands, 1996).Google Scholar
3.Jaffe, H.W.: Crystal Chemistry and Refractivity. (Cambridge University Press, Cambridge, UK, 1988).Google Scholar
4.Rodic, D., Mitric, M., Tellgren, R., Rundlof, H.: The cation distribution and magnetic structure of Y3Fe5-xAlxO12. J. Magn. Magn. Mater. 232, 1 (2001).CrossRefGoogle Scholar
5.Pan, Y., Wu, M., Su, Q.: Comparative investigation on synthesis and photoluminescence of YAG:Ce phosphor. Mater. Sci. Eng., B 106, 251 (2004).CrossRefGoogle Scholar
6.Steigerwald, D.A., Bhat, J.C., Collins, D., Fltcher, R.M., Holcomb, M.O., Ludowise, M.J., Martin, P.S., Rudaz, S.L.Illumination with solid-state lighting technology. IEEE J. Quantum Electron. 8, 310 (2002).Google Scholar
7.Matsushita, N., Tsuchiya, N., Nakatsuka, K.: Precipitation and calcinations processes for yttrium aluminium garnet precursors synthesized by the urea method. J. Am. Ceram. Soc. 82, 1977 (1999).Google Scholar
8.Palmero, P., Esnouf, C., Montanaro, L., Fantozzi, G.: Influence of the co-precipitation temperature on phase evolution in yttrium-aluminium oxide materials. J. Eur. Ceram. Soc. 25, 1565 (2005).CrossRefGoogle Scholar
9.Li, X., Liu, H., Wang, J., Cui, H., Zhang, X., Han, F.: Preparation of YAG:Nd nano-sized powder by co-precipitation method. Mater. Sci. Eng., A 379, 347 (2004).Google Scholar
10.Ramanathan, S., Kakade, M.B., Roy, S.K., Kutty, K.K.: Processing and characterization of combustion synthesized YAG powders. Ceram. Int. 29, 477 (2003).CrossRefGoogle Scholar
11.Nyman, M., Caruso, J., Hampden-Smith, M.J.: Comparison of solid-state and spray-pyrolysis synthesis of yttrium aluminate powders. J. Am. Ceram. Soc. 80, 1231 (1997).CrossRefGoogle Scholar
12.Kong, L.B., Ma, J., Huang, H.: Low-temperature formation of yttrium aluminium garnet from oxides via a high-energy ball milling process. Mater. Lett. 56, 344 (2002).Google Scholar
13.Hardy, A.B., Gowda, G., McMahon, T.J., Riman, R.E., Rhine, W.E., Bowen, H.K. Preparation of oxide powders, in Ultrastructure Processing of Advanced Ceramics, edited by MacKenzie, J.D. and Ulrich, D.R. (John Wiley & Sons, New York, 1988), p. 407.Google Scholar
14.Manual, TOPAS User’s: Bruker Advanced X-Ray Solutions (Bruker AXS GmbH, Germany, Karlsruhe, 2003).Google Scholar
15.Paulik, F.: Special Trends in Thermal Analysis. (John Wiley & Sons, Chicester, UK, 1995).Google Scholar
16.Sim, S.M., Keller, K.A., Mah, T.I.: Phase formation in yttrium aluminium garnet powders synthesized by chemical methods. J. Mater. Sci. 35, 713 (2000).Google Scholar
17.Kinsman, K.M., Mckittrick, J., Sluzky, E., Hesse, K.: Phase development and luminescence in chromium-doped yttrium aluminum garnet (YAG:Cr) phosphors. J. Am. Ceram. Soc. 77, 2866 (1994).CrossRefGoogle Scholar
18.Apte, P., Burke, H., Pickup, H.: Synthesis of yttrium aluminium garnet by reverse strike precipitation. J. Mater. Res. 7, 706 (1992).CrossRefGoogle Scholar
19.Hsu, W.T., Wu, W.H., Lu, C.H.: Synthesis and luminescent properties of nano-sized Y3Al5O12:Eu3+ phosphors. Mater. Sci. Eng., B 104, 40 (2003).Google Scholar
20.Su, L.T., Tok, A.I.Y., Boey, F.Y.C.Happy, Synthesis and Properties of Spherical Nanocrystalline Y2O3:Eu3+ Global Phosphors Summit, San Diego, CA, 2005.Google Scholar
21.Zou, X., Sundberg, M., Larine, M., Hovmoller, S.: Structure projection retrieval by image processing of HREM images taken under non-optimum defocus conditions. Ultramicroscopy 62, 103 (1996).Google Scholar
22.Stadelmann, P.A.: EMS: A software package for electron diffraction analysis and HREM image simulation in materials science. Ultramicroscopy 21, 131 (1987).Google Scholar