Paper Titles
Solid Oxide Fuel Cell PEN Structures Fabricated by Tape Casting and Co-Firing Technologies
p.759
Viscoelastic Properties of Pb(ZrTi)O3-Based Slurry for Tape Casting
p.763
Low Temperature Synthesis of Strontium Barium Niobate by Spark Plasma Sintering
p.767
Study on Spark Plasma Sintering of NiAl2O4-Metal Inert Anodes
p.771
BaO-Nd2O3-TiO2 Nano-Ceramics Prepared by SPS Technology
p.775
Co-Sintering of SDC / NiO-SDC Bi-Layers Prepared by Tape Casting
p.779
Shape Forming and Microwave Sintering of Thin Wall Tubular Lithium Aluminate
p.785
Synthesis and Densification of Nanometer K0.6Sr0.7Zr4P6O24 Powder
p.791
Effects of Substrates on the Composition and Microstructure of TiO2 Thin Films Prepared by the LPD Method
p.795

BaO-Nd2O3-TiO2 Nano-Ceramics Prepared by SPS Technology

Article Preview

Abstract:

Fine grained and dense dielectric ceramics of the BaO-Nd2O3-TiO2 system have been fabricated by the most advanced Spark Plasma Sintering (SPS) technology, whose average grain size is about 100nm as determined by SEM. XRD showed that the diffractive peak of the sample was broadened clearly. The nano-ceramic microstructure formed by SPS is due to the high pressure up to 50 MPa, low temperature (1000°C) and fast sintering (1 minute). The BaO-Nd2O3-TiO2 ternary nanoceramic sample, which consists of the main phase Nd2Ti2O7 with perovskite-like layer structure (PLS) and the secondary phase BaNd2Ti4O12（Ba4.5Nd9Ti18O54）with perovskite-like tungsten bronze structure, was prepared for the first time by rapidly sintering nano-particles of the xBaO×(0.35-x)Nd2O3×0.65TiO2 compound. Those two phases are formed in BaO-Nd2O3-TiO2 micron-grained ceramics prepared by normal sintering of the nano-particles at 1300°C, resulting in good dielectric characteristics for microwave ceramics; however, dielectric characteristics are significantly degraded in the SPS-sintered samples probably due to the carbon contamination from the graphite SPS dies.

You might also be interested in these eBooks
High-Performance Ceramics III View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 280-283)

Pages:

775-778

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.775

Citation:

Cite this paper

Online since:

February 2007

Authors:

Yong Xiang, Dao Hua Xie, Kuan Xiu Song, Yu Shuang Zhao, Jing Feng Li

Keywords:

Nanoceramic, Perovskite Like Structure, Spark Plasma Sintering (SPS)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2005 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] X. Fan: X-ray Diffraction Procedures for Polycrystalline and Amorphous Materials (China Machine Press, 1988), p.40.

Google Scholar

[2] H. P. Klug, L. E. Alexander: X-ray diffraction Technology (Metallurgical Industry Press, 1986).

Google Scholar

[3] J. Han: The analysis of polycrystalline X-ray structure (East China Normal University Press, 1989), p.295.

Google Scholar

[4] N. Ishizawa, F. Marumo and S. Iwai: Acta Cryst. Vol. B38 (1982), p.368.

Google Scholar

[5] J. Takahashi, T. Ikegami and K. Kageyama: J. Am. Ceram. Soc. Vol. 74 (1991), p.1873.

Google Scholar

[6] R. G. Matveeva, M. B. Varfolomeev and L. S. II'yushchenko: Russ. J. Inorg. Chem. Vol. 29 (1984), p.17.

Google Scholar

[7] H. Ohsato, M. Mizuta, T. Ikoma, Y. Onogi, S. Nishigaki and T. Okuda: J. Ceram. Soc. Jpn. Vol. 106 (1998), p.178.

Google Scholar

[8] D. Suvorov, M. Valant and D. Kolar: J. Mater. Sci. Vol. 32 (1997), p.6483.

Google Scholar

[9] T. Tomonari, T. Mitsuharu, K. Hiroyuki and S. Yoko: J. Am. Ceram. Soc. Vol. 82 (1999), p.939.

Google Scholar