Charge correlation of ferroelectric and piezoelectric properties of (1 − x)(Na0.5Bi0.5)TiO3–xBaTiO3 lead-free ceramic solid solution
Single phased lead-free (1 − x )(Na 0.5 Bi 0.5 )TiO 3 – x BaTiO 3 ( x = 0.00, 0.04, 0.08 and 0.12) ((1 − x )NBT– x BT) ceramics were synthesized by the solid-state reaction method. The powder X-ray diffraction patterns and profile refinements revealed that, for 0.04 < x < 0.08, the prepar...
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Published in | Journal of materials science. Materials in electronics Vol. 28; no. 13; pp. 9950 - 9963 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.07.2017
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Single phased lead-free (1 −
x
)(Na
0.5
Bi
0.5
)TiO
3
–
x
BaTiO
3
(
x
= 0.00, 0.04, 0.08 and 0.12) ((1 −
x
)NBT–
x
BT) ceramics were synthesized by the solid-state reaction method. The powder X-ray diffraction patterns and profile refinements revealed that, for 0.04 <
x
< 0.08, the prepared ceramics have been crystallized in morphotropic phase boundary between rhombohedral to tetragonal structures. The charge distribution and bonding behaviour in (1 −
x
)NBT–
x
BT unit cell were completely analyzed through charge density distribution studies. UV–visible analysis reveals that, the optical band gap energy of the solid solution increases with addition of BaTiO
3
content. The surface morphology and elemental compositions for the sintered powders were analyzed through scanning electron microscopy and energy dispersive X-ray studies. Electrical measurements on the solid solutions showed that the maximum values of the dielectric constant, the remnant polarization and the piezoelectric coefficient are reached at near (
x
= 0.08) the morphotropic phase boundary (
ε
= 4070 at 100 kHz;
P
r
= 18.92 µC/cm
2
;
d
33
= 122 pC/N). Thus, the (1 −
x
)NBT–
x
BT system is expected to be a promising candidate for lead-free piezoelectric material. |
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ISSN: | 0957-4522 1573-482X |
DOI: | 10.1007/s10854-017-6753-5 |