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Structure and dielectric properties of Pb(Zn0.2Ni0.8)1/3Nb2/3O3–PbTiO3 ferroelectric ceramic near the morphotropic phase boundary

✍ Scribed by Jing-Song Pan; Xiao-Wen Zhang; Ke-Pi Chen

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
190 KB
Volume
121
Category
Article
ISSN
0921-5107

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✦ Synopsis

The structure and dielectric behaviors of compositions near the morphotropic phase boundary (MPB) of (1x)Pb(Zn 0.2 Ni 0.8 ) 1/3 Nb 2/3 O 3 -xPbTiO 3 ceramics have been systematically investigated as a function of PbTiO 3 (PT) content. XRD experiments demonstrate that compositions with x = 0.26-0.38 lie in the MPB region of this ternary system. Dielectric behaviors of frequency dispersion and diffuse phase transition are gradually weakened with increasing PT content. Composition with x = 0.30 exhibits the maximum dielectric constant of about 24,500 at 1 kHz. Compared with Pb(Ni 1/3 Nb 2/3 )O 3 -PbTiO 3 system, the addition of Pb(Zn 1/3 Nb 2/3 )O 3 in this study brings about the enlargement of the MPB region, the increase in the Curie temperature and the improvement of dielectric properties.

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