Physical Properties of Ba(Ti0.96Sn0.04)O3 Ceramics

doi:10.15541/jim20160038

Abstract

Abstract:

The Ba(Ti_0.96Sn_0.04)O₃ ceramics were prepared through solid-state reaction route. Piezoelectric property, dielectric property, ferroelectric property, and microstructure were investigated. It is found that raw material and processing technique can largely affect the piezoelectric property of the Ba(Ti_0.96Sn_0.04)O₃ ceramics. By comparing with the physical property of pure BaTiO₃ ceramics, Sn doping significantly increases the transition temperature from orthorhombic phase to tetragonal phase (T_O-T) of the Ba(Ti_0.96Sn_0.04)O₃ ceramic to 36.9℃, while the thermal hysteresis at about T_O-T is only 1.8℃. Its microstructure shows complicated domain, mainly composed of simple 90° parallel stripes with a few of different 180° configurations. P-E curve shows ideal square-like and saturated form with remanent polarization P_r of 18.9 μC/cm² and coercive field E_c of 2.5 kV/cm. In addition, it is the non-180°-domain switching that leads large converse piezoelectric constant d₃₃^*, (up to 550 pm/V).

Key words: Ba(Ti0.96Sn0.04)O3, piezoelectric property, dielectric property, ferroelectric property, microstructure

CLC Number:

TQ174

WU Yan-Qing, ZHANG Jia-Liang, LIU Da-Kang, SUN Dan-Dan. Physical Properties of Ba(Ti_0.96Sn_0.04)O₃ Ceramics[J]. Journal of Inorganic Materials, 2016, 31(8): 850-854.

Figures/Tables 8

Table 1 Physical properties of BaTi0.96Sn0.04O3(BTS) and BaTiO3(BTO) ceramics at room temperature

	Fine-BTO	Coarse-BTO	BTS(Ref.[10])	BTS
ρ₀/%	98.1	98.4	97.8	97.8
g/μm	1.2	28.0	5.9	80.0
d₃₃/(pC·N^-1)	413	173	205	300
ε′(at 1 kHz)	3310	2910	3826	1855
T_O-T/℃	28.3	23.1	43.0	36.9
T_C/℃	121.2	123.5	92.2	92.4

Fig. 1 Unipolar electric field-strain S-E curves of BTS ceramics

Fig. 2 XRD patterns of BTS and BTO ceramics

Fig. 3 Variation of d33 with temperature for BTS and BTO ceramics

Fig. 4 ε′ versus temperature curves of the unpoled BTS and BTO ceramics

Fig. 5 Thermal hysteresis curves of the BTS and BTO ceramics

Fig. 6 P-E loops of BTS and BTO ceramics

Fig. 7 Optical images of BTS ceramics (a) Grain size; (b) Domain pattern

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Physical Properties of Ba(Ti_0.96Sn_0.04)O₃ Ceramics

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