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Processing and Application of Ceramics
2009, vol. 3, br. 1-2, str. 33-38
jezik rada: engleski

Microemulsion mediated synthesis of BaTi03-Ag nanocomposites
(naslov ne postoji na srpskom)
aInsistute für Festkörperforschung (IFF), Forschungszentrum Jülich GmbH, Jülich, Germany
bInstute für Chemie und Dynamik der Geosphäre (ICG), Forschungszentrum Jülich GmbH, D-Jülich, Germany
cInstute für Werkstoffe der Elektrotechnik (IWE II), RWTH Aachen, Aachen, Germany


(ne postoji na srpskom)
BaTiO3 - Ag composite nanopowders were synthesized via microemulsion mediated synthesis through the hydrolytic decomposition of mixed metal alkoxide solutions as precursor for the BaTiO3 and the reduction of silver nitrate in the presence of polyvinylpyrrolidone (PVP) as source for the Ag nanoparticles. The X-ray diffraction (XRD) patterns indicate that BaTiO3 and Ag phases were successfully synthesized in the composite powders. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show that the synthesized BaTiO3 nanoparticles were aggregates of nanosized primary particles as small as 10 nm in diameter and the average particle size of nanocrystalline Ag was about 100 nm. Calcination and sintering studies reveal that there exists a difference in the sintering behaviour of BaTiO3 and Ag in the composite nanopowders. Thermogravimetric analysis (TGA) shows weight losses due to the burnout of organic residues arising from the synthesis, the release of water from the surface and separation of hydroxyl ions from the lattice of BaTiO3 nanoparticles. A dilatometric study of BaTiO3-Ag composite confirmed a strong difference in the shrinkage behaviour compared to that of the pure BaTiO3 obtained by microemulsion mediated synthesis.

Ključne reči

nanoparticulate synthesis; ceramic processing; BaTiO3-Ag nanocomposites; cermets


Beck, C., Härtl, W., Hempelmann, R. (1998) Size-controlled synthesis of nanocrystalline BaTiO3 by a sol-gel type hydrolysis in microemulsion-provided nanoreactors. Journal of Materials Research, 13(11): 3174
Camurlu, H.E. (2007) Synthesis of zirconium diboride-zirconium nitride composite powders by self-propagating high-temperature synthesis. Journal of Materials Science, 42(24): 10288
Fang, J., Wang, J., Ng, S.C., Chew, C.H., Gan, L.M. (1997) Ultrafine zirconia powders via micro emulsion processing route. Nanostructured Materials, 8(4): 499
George, S., James, J., Sebastian, M.Th. (2007) Journal of the American Ceramic Society, 90(11): 3522
Hennings, D., Klee, M., Waser, R. (1991) Advanced dielectrics: Bulk ceramics and thin films. Adv. Mater, 3 [7-8] 334-340
Herrig, H., Hempelmann, R. (1996) A colloidal approach to nanometre-sized mixed oxide ceramic powders. Materials Letters, 27(6): 287
Hwang, H.J., Watari, K., Sando, M., Toriyama, M., Niihara, K. (1997) Low-temperature sintering and high-strength Pb(Zr, Ti)O3-matrix composites incorporating silver particles. J. Am. Ceram. Soc., 80, [3], 791-793
Komarneni, S. (1992) Nanocomposites. Journal of Materials Chemistry, 2(12): 1219
Kondo, H., Sekino, T., Tanaka, N., Nakayama, T., Kusunose, T., Niihara, K. (2005) Mechanical and magnetic properties of novel yttria-stabilized tetragonal zirconia/Ni nanocomposite prepared by the modifi ed internal reduction method. Journal of the American Ceramic Society, 88(6): 1468
Kumar, V. (1999) Solution-precipitation of fine powders of barium titanate and strontium titanate. J. Am. Ceram. Soc, 82, 10, 2580-2584
Lee, T.J., Sheppard, K.G., Li, Y.Q., Gallois, B. (1996) Synthesis of a nanophase, whisker-reinforced, ceramic/metal composite by electrochemical infiltration. Journal of Materials Science, 31(24): 6555
Lin, Y., Nan, C.W., Wang, J., Liu, G., Wu, J., Cai, N. (2004) Dielectric behavior of Na0.5Bi0.5TiO3-based composites incorporating silver particles. Journal of the American Ceramic Society, 87(4): 742
Moon, K.S., Dong, H., Maric, R., Pothukuchi, S., Hunt, A., Li, Y., Wong, C.P. (2005) Thermal behavior of silver nanoparticles for low-temperature inter connect applications. Journal of Electronic Materials, 34(2): 168
Moreno, B., Chinarro, E., Fierro, J.L.G., Jurado, J.R. (2007) Synthesis of the ceramic-metal catalysts (PtRuNi-TiO2) by the combustion method. J Power Sources, 169 [1], 98-102
Moulson, A.J., Herbert, J.M. (1995) Electroceramics: Materials-properties-applications. London: Chapman & Hall
Panteny, S., Bowen, C.R., Stevens, R. (2006) Characterisation of barium titanate-silver composites, Part I: Microstructure and mechanical properties. J Mater. Sci, 41 [12] 3837-3843
Panteny, S., Bowen, C.R., Stevens, R. (2006) Characterisation of barium titanate-silver composites, Part II: Electrical properties. J Mater. Sci, 41 [12] 3845-3851
Pecharromán, C., Esteban-Betegón, F., Bartolomé, J.F., López-Esteban, S., Moya, J.S. (2001) New percolative Ba-TiO3-Ni composites with a high and frequency-independent dielectric constant (εr ≈ 80 000). Advanced Materials, 13(20): 1541
Phule, P.P., Risbud, S.H. (1990) Low-temperature synthesis and processing of electric materials in the BaO-TiO2 System. J Mater. Sci, 25 1169-1183
Pithan, C., Shiratori, Y., Waser, R., Dornseiffer, J., Haegel, F.H. (2006) Preparation, processing, and characterization of nano-crystalline BaTiO3 powders and ceramics derived from microemulsion-mediated synthesis. J. Am. Ceram. Soc, 89 [9] 2908- 2916
Qi, J., Li, L., Wang, Y., Gui, Z. (2004) Preparation of nanoscaled BaTiO3 powders by DSS method near room temperature under normal pressure. J. Cryst. Growth, 260, [3-4], 551-556
Qiu, L.X., Yao, B., Ding, Z.H., Zheng, Y.J., Jia, X.P., Zheng, W.T. (2008) Characterization of structure and properties of TiN-TiB2 nano-composite prepared by ball milling and high pressure heat treatment. Journal of Alloys and Compounds, 456 (1-2) 436-440
Wang, J., Fang, J., Ng, S.C., Gan, L.M., Chew, Ch.H., Wang, X., Shen, Z. (1999) Ultrafine barium titanate powders via micro emulsion processing routes. J. Am. Ceram. Soc, 82, [4], 873-881
Wang, J.P., Luo, H.L. (1994) Preparation and properties of pure nanocomposite Fe-SiO2 using thesol-gel method. J Magn. Magn. Mater, 131 (1-2), 54-60
Xi, X.M., Yang, X.F. (1996) Spontaneous infiltration of aluminum-silicon alloy into silicon carbide preforms in air. Journal of the American Ceramic Society, 79(1): 102
Zhang, J.X., Gao, L.Q. (2001) Nanocomposite powders from coating with heterogeneous nucleation processing. Ceramics International, 27(2): 143