Enhancement of field-induced strain and bright upconversion luminescence in BNT-based multifunctional ceramics
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Enhancement of field-induced strain and bright upconversion luminescence in BNT-based multifunctional ceramics Jianhua Yang1, Zhijun Xu1,* , Cuixue Zhu1, Haibo Yu1, Da Wang1, Xiaolin Zhang1, Ruiqing Chu1, and Jigong Hao2,* 1 2
School of Environmental and Materials Engineering, Yantai University, 32 Qingquan Road, Yantai 264005, China School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China
Received: 13 September 2020
ABSTRACT
Accepted: 13 October 2020
In this work, a multifunctional lead-free (Bi0.5Na0.5)0.945Ba0.065Ti(1-x)(Fe0.5Sb0.5)xO3-0.005Er (BNBT-Er-xFS) ferroelectric material was prepared through the solid-state method, which has a large reversible fieldinduced strain of 0.465% (under an moderate electric field of 65 kV/cm) with a high normalized strain d33* (Smax/Emax) of 713 pm/V. Besides the excellent strain properties, this system also exhibits a bright green upconversion emission under excitation of 980 nm due to the luminescence characteristic of Er3? ion. Moreover, the upconversion luminescence performance of BNBT-Er-xFS is enhanced with the (Fe0.5Sb0.5)4? doping. At x = 0.0075, sample exhibited the strongest upconversion luminescence. As a multifunctional material, the BNBTEr-xFS system is expected to be used in multifunctional electronic devices due to its excellent electrical and photoluminescence performance.
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1 Introduction As the hopeful of candidate materials for lead-based piezoelectric ceramics, the (Bi0.5Na0.5)(1-x)BaxTiO3 (BNBT)-based ceramics have excellent performance of piezoelectric near the morphotropic phase boundary (at x = 0.06–0.07) [1, 2]. The main advantage of BNBT-based materials lies in its giant fieldinduced strain through appropriate chemical modification [3]. The beginnings of scientific interest in electric field-induced strain can be traced back to Zhang et al. [4]. In 2007, Zhang et al. made great
progress on the ternary BNBT-KNN system and obtained a giant strain of 0.45% compared to some Pb-based ceramics. In recent years, great progress has been made in explaining the large strain mechanism, which is believed to originate from the transition between the ergodic relaxor composed of nano-scale domains and the ferroelectric state [5]. The ergodic relaxor ferroelectrics are materials with neighboring spontaneous polarization dipoles that are antiparallel to one another. [6] Under the action of an external electric field, the larger strain response is caused by the ergodic relaxation phase can be reversibly
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https://doi.org/10.1007/s10854-020-04676-x
J Mater Sci: Mater Electron
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changed to a ferroelectric state [2]. Subsequently, some compounds, such as Bi4Ti3O12 [7], BaSnO3 [8], NaNbO3 [9], Ba(Zn1/3Nb2/3)O3 [10], were adopted into BNT-BT to obtain large strains. With the continuous development of technology, various elect
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