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Agglomerate-free BaTiO3 particles by salt-assisted spray pyrolysis

Published online by Cambridge University Press:  31 January 2011

Yoshifumi Itoh ,
I. Wuled Lenggoro ,
Sotiris E. Pratsinis  and
Kikuo Okuyama
Yoshifumi Itoh
Affiliation:
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
I. Wuled Lenggoro
Affiliation:
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
Sotiris E. Pratsinis
Affiliation:
Department of Mechanical and Process Engineering, Swiss Federal Institute of Technology (ETH), ETH Zurich, Zurich, CH-8092, Switzerland
Kikuo Okuyama*
Affiliation:
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
*
a)Address all correspondence to this author.okuyama@hiroshima-u.ac.jp
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Abstract

Optimum conditions for the synthesis of nonagglomerated BaTiO3 particles by salt-assisted spray pyrolysis (SASP) were investigated. The effect of particle residence time in the reactor and salt concentration on the crystallinity and surface morphology of BaTiO3 was examined by x-ray diffraction and scanning electron microscopy. Mixtures of a metal chloride or nitrate salt, dissolved in aqueous precursor solutions, were sprayed by an ultrasonic atomizer into a five-zone hot-wall reactor. By increasing the salt concentration or the particle residence time in the hot zone, the primary particle size was increased, and its surface texture was improved compared to BaTiO3 particles prepared by conventional spray pyrolysis. The SASP-prepared BaTiO3 crystal was transformed from cubic to tetragonal by simply increasing the salt concentration at constant temperature and residence time. Further thermal treatments such as calcination or annealing are not necessary to obtain nonagglomerated tetragonal BaTiO3 (200–500 nm) particles with a narrow size distribution. Increasing the carrier gas flow rate and decreasing the residence time in the hot zone resulted in cubic BaTiO3 particles about 20 nm in diameter.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 12 , December 2002 , pp. 3222 - 3229
Copyright
Copyright © Materials Research Society 2002

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References

1.Hu, M.Z.C., Kurian, V., Payzant, E.A., Rawn, C.J., and Hunt, R.D., Powder Technol. 110, 2 (2000).CrossRefGoogle Scholar
2.Arlt, G., Hennings, D., and Dewith, G., J. Appl. Phys. 58, 1619 (1985).CrossRefGoogle Scholar
3.Sakabe, Y., Wada, N., and Hamaji, Y., J. Korean Phys. Soc. 32 s260 (1998).Google Scholar
4.Kajiyoshi, K., Ishizawa, N., and Yoshimura, M., J. Am. Ceram. Soc. 74, 369 (1991).CrossRefGoogle Scholar
5.Dutta, P.K. and Gregg, J.R., Chem. Mater. 4, 843 (1992).Google Scholar
6.Cho, W.S., Hamada, E., and Takayanagi, K., J. Appl. Phys 81 3000 (1997).Google Scholar
7.Choi, G.J., Lee, S.K., Woo, K.J., Koo, K.K., and Cho, Y.S., Chem. Mater. 10, 4104 (1998).Google Scholar
8.Kong, L.B., Ma, J., Zhang, R.F., and Que, W.X., J. Alloys Compd. 337 226 (2002).Google Scholar
9.Xu, H., Gao, L., and Guo, J., J. Eur. Ceram. Soc. 22, 1163 (2002).CrossRefGoogle Scholar
10.Lu, S.W., Lee, B.I., Wang, Z.L., and Samuels, W.D., J. Cryst. Growth 219, 269 (2000).Google Scholar
11.Kerchner, J.A., Moon, J., Chodelka, R.E., Morreone, A.A., and Adair, J.H., ACS Symp. Ser. 681, 106 (1998).Google Scholar
12.Milosevic, O.B., Mirkovic, M.K., and Uskokovic, D.P., J. Am. Ceram. Soc. 79, 1720 (1996).CrossRefGoogle Scholar
13.Ogihara, T., Aikiyo, H., Ogata, N., and Mizutani, N., Adv. Powder Technol. 10, 37 (1999).CrossRefGoogle Scholar
14.Nonaka, K., Hayashi, S., Okada, K., and Otsuka, N., J. Mater. Res. 6 1750 (1991).CrossRefGoogle Scholar
15.Maison, W., Kleeberg, R., Heimann, R.B., and Phanichphant, S., J. Eur. Ceram. Soc. 23, 127 (2003).CrossRefGoogle Scholar
16.Xia, B., Lenggoro, I.W., and Okuyama, K., Adv. Mater. 13, 1579 (2001).Google Scholar
17.Xia, B., Lenggoro, I.W., and Okuyama, K., J. Mater. Chem. 13 2925 (2001).Google Scholar
18.Xia, B., Lenggoro, I.W., and Okuyama, K., Chem. Mater. 14, 2623 (2002).Google Scholar
19.JCPDS File No. 31–174, Joint Committee for Powder Diffraction Standards, Newton Square, PA (1984).Google Scholar
20.ICDD. File No. 5–626, International Center for Diffraction Data, Newton Square, PA (1984).Google Scholar