Photostriction of NBT-BNT Ceramics

doi:10.15541/jim20200254

Abstract

Abstract:

Photostrictive materials exhibit great potential in the light-driven microactuators/sensors, light-controlled microrobots, and other optomechanical applications. In this study, we present the photostrictive performance of Ni-modified Na_0.5Bi_0.5TiO₃-BaTiO₃ (NBT-BT) ceramics prepared by using spark plasma sintering. Under visible light illumination (405, 520 and 655 nm, respectively), the Na_0.5Bi_0.5TiO₃-Ba(Ti_0.5Ni_0.5)O₃ (NBT-BNT) ceramics exhibits large photostriction of the order of 10 ^-3 and photostriction coefficient around 10 ^-11 m ³/W. The XRD peaks of the sample under external illumination show low angle shift, indicating the light-induced lattice distortion, which contributes to the large photostrictive response of NBT-BNT ceramics.

Key words: ferroelectric material, photostriction, visible light response, perovskite

CLC Number:

TQ174

DONG Zhengming, LI Xiu, CHEN Chen, CAO Minghe, YI Zhiguo. Photostriction of NBT-BNT Ceramics[J]. Journal of Inorganic Materials, 2021, 36(3): 277-282.

Figures/Tables 9

Fig. 1 XRD patterns (a-b) of NBT-BNT and NBT-BT samples, cross sectional SEM images of NBT-BNT (c) and NBT-BT (d) ceramic

Fig. 2 Absorption spectra (a) and bandgaps (b) of NBT-BNT and NBT-BT samples

Fig. 3 Photostrictive performance of the NBT-BNT sample under different light conditions (shaded part indicates laser on state) (a), Stability of the photostrictive properties of the NBT-BNT sample under 5 kW/cm2 (b) and 15 kW/cm2 (c), photostriction coefficient of NBT-BNT sample under different light conditions (d), temperature change of the NBT-BNT sample (e) corresponding to Fig.(a), and thermal expansion curve of the NBT-BNT sample (f)

Table 1 Comparison of the photostrictive performances of the materials in literature and this work

Compounds	Sample thickness	Illumination wavelength/nm	Light irradiance	λ_max/%	η/(m³·W^-1)
PLZT ceramics^[26]	0.5 mm	365	150 W/m²	0.01	3.3×10^-10
BiFeO₃ crystal^[9]	90 µm	365	326 W/m²	0.003	8.2×10^-12
BiFeO₃ film^[8]	35 nm	400	2 mJ/cm²	0.46	4×10^-25
Silicon crystal^[11]	0.5 mm	248	127 mJ/cm²	-6.4×10^-4	-3.7×10^-20
Nematic elastomers^[30]	-	365	-	20	-
SrRuO₃ film^[6]	40 nm	532	62.5 W/cm²	1.12	7×10^-16
CH₃NH₃PbBr₃crystal^[5]	2.7 mm	532	60 W/cm²	-1.25	-5.6×10^-11
NBT-BNT	0.2 mm	405	25 kW/m²	0.21	1.68×10^-11
	0.2 mm	520	25 kW/m²	0.13	1.10×10^-11
	0.2 mm	655	25 kW/m²	0.11	9.12×10^-12

Fig. 4 I-V curves of the NBT-BNT sample before (a) and after (b) electric polarization

Fig. 5 XRD patterns of NBT-BNT sample under different external laser irradiations (a) and enlarged images of partial diffraction peaks (b)

Table 2 The displacement Δd/d of crystal planes of NBT- BNT samples under laser irradiation

Wavelength /nm	Δd/d
Wavelength /nm	(100)	(110)	(111)	(200)	(211)	(220)
405	0.0008	0.0003	0.0001	0.0003	0.0001	0.0005
520	0.0015	0.0005	0.0002	0.0002	0.0001	0.0003
655	0.0016	0.0004	0.0003	0.0002	0.0002	0.0003

Fig. 6 XRD patterns (a) and enlarged patterns of partial peaks (b) of NBT-BNT sample at different temperatures

Table 3 The displacement Δd/d of crystal planes of NBT- BNT samples at different temperatures

Temperature /℃	Δd/d
Temperature /℃	(100)	(110)	(111)	(200)	(211)	(220)
50	0.0004	0.0001	0.0003	0.0001	0.0005	0.0009
100	0.0008	0.0004	0.0004	0.0004	0.001	0.0008
150	0.0009	0.0006	0.0006	0.0005	0.0012	0.0011

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