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Title: A polyethylene glycol-assisted route to synthesize Pb(Ni1/3Nb2/3)O3-PbTiO3with improved electric properties
Authors: Ye, Y
Yu, SH
Huang, HT 
Zhou, LM 
Keywords: Niobium
X-ray diffraction
Issue Date: 2007
Publisher: SPIE-International Society for Optical Engineering
Source: Proceedings of SPIE : the International Society for Optical Engineering, 2007, v. 6423, 64232F How to cite?
Journal: Proceedings of SPIE : the International Society for Optical Engineering 
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.
Description: International Conference on Smart Materials and Nanotechnology in Engineering, Harbin, China, 1-4, July 2007
ISSN: 0277-786X
EISSN: 1996-756X
DOI: 10.1117/12.779871
Appears in Collections:Conference Paper

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