Preparation and Electric Properties of Bi 0.5 Na 0.5 TiO 3 – Bi ( Al 0.5 Ga 0.5 ) O 3 Lead‐Free Piezoceramics
A new lead‐free BNT ‐based piezoelectric ceramics of (1 − x ) Bi 0.5 Na 0.5 TiO 3 – x Bi ( Al 0.5 Ga 0.5 ) O 3 ( x = 0, 0.02, 0.03, 0.04, and 0.05) were synthesized using a conventional ceramic fabrication method. Their structures and electrical properties were investigated. All the samples show a...
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Published in | Journal of the American Ceramic Society Vol. 96; no. 12; pp. 3793 - 3797 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.12.2013
|
Online Access | Get full text |
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Summary: | A new lead‐free
BNT
‐based piezoelectric ceramics of (1 −
x
)
Bi
0.5
Na
0.5
TiO
3
–
x
Bi
(
Al
0.5
Ga
0.5
)
O
3
(
x
= 0, 0.02, 0.03, 0.04, and 0.05) were synthesized using a conventional ceramic fabrication method. Their structures and electrical properties were investigated. All the samples show a typical ferroelectric
P
(
E
) loops and
S
(
E
) curves at room temperature. The optimal properties are obtained at the composition of the
x
= 0.03. The substitution of
Bi
(
Al
0.5
Ga
0.5
)
O
3
enhances piezoelectric constant and increases Curie temperature from 58 pC/N and 310°C of pure
BNT
to 93 pC/N and 325°C of the
x
= 0.03. The temperature‐dependent
P
(
E
) loops and
S
(
E
) curves of 0.97BNT–0.03BAG indicate that phase transition from ferroelectric to antiferroelectric takes place over a very wide temperature region from 80°C to 180°C. The results show that the introduction of
BAG
improves the electrical properties of
BNT
. |
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ISSN: | 0002-7820 1551-2916 |
DOI: | 10.1111/jace.12588 |