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Proceedings Paper

A polyethylene glycol-assisted route to synthesize Pb(Ni1/3Nb2/3)O3-PbTiO3 with improved electric properties
Author(s): Yin Ye; Shuhui Yu; Haitao Huang; Limin Zhou
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Paper Abstract

Polyethylene glycol (PEG)-assisted solid state reaction route is employed to prepare the relaxor-type ferroelectric powders and ceramics of (1-x)Pb(Ni1/3Nb2/3)O3−xPbTiO3 (PNN-PT) with the morphotropic phase boundary (MPB) composition at x=0.36 (0.64PNN-0.36PT). PEG additive with the molecular weight of 200 is introduced into PNN-PT oxide precursors in order to obtain the perovskite phase. The XRD and TG/DSC results demonstrate that the interactions between PbO and PEG favor the transformation from the lead-rich pyrochlore to the lead-deficient pyrochlore, thus facilitating the formation of the perovskite. Consequently, nearly pure perovskite 0.64PNN-0.36PT powders are synthesized at a relatively low temperature of 850 °C. A significant improvement of electric properties of the ceramics sintered at 1200 °C is achieved by PEG modification. The dielectric constant at room temperature and the maximum dielectric constant at Tc reach 4987 and 24307, respectively, at a frequency of 1 kHz. The piezoelectric constant d33 is 460 pC/N.

Paper Details

Date Published: 1 November 2007
PDF: 7 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64232F (1 November 2007); doi: 10.1117/12.779871
Show Author Affiliations
Yin Ye, The Hong Kong Polytechnic Univ. (Hong Kong China)
Shuhui Yu, The Hong Kong Polytechnic Univ. (Hong Kong China)
Haitao Huang, The Hong Kong Polytechnic Univ. (Hong Kong China)
Limin Zhou, The Hong Kong Polytechnic Univ. (Hong Kong China)


Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering

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