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Ferroelectrics Volume 427, 2012 - Issue 1
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Original Articles

Influence of Ag-Doping on Ferroelectric Properties of Bi7Ti4NbO21 Ceramics

Kyoshiro Kawada Department of Vehicle and Mechanical Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku Nagoya, 4688502, Japan
,
Akinori Kan Department of Vehicle and Mechanical Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku Nagoya, 4688502, Japan
,
Yuki Ueda Department of Vehicle and Mechanical Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku Nagoya, 4688502, Japan
,
Tohru Moriyama Department of Vehicle and Mechanical Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku Nagoya, 4688502, Japan
&
Hirotaka Ogawa Department of Vehicle and Mechanical Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku Nagoya, 4688502, Japan
Pages 105-113 | Received 26 Jun 2011, Accepted 30 Nov 2011, Published online: 13 Jun 2012
 
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Abstract

The crystal structure and ferroelectric properties of Ag-doped Bi7Ti4NbO21 (BTN-xAg, x = 0–0.015) ceramics were investigated in this study. The small amounts of Ag dopant extremely exerted an influence on the stability of crystal structure of BTN-xAg ceramics sintered at 1160°C and was effective in coarsening the grain structures of BTN ceramics without partial melting. Based on the lattice parameters of Ag-doped BTN ceramics, the solubility limit of Ag substitution for Bi was found to be approximately x = 0.01 and the highest P r value of 14μC/cm2 was obtained.

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