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Boosting energy harvesting performance in (Ba,Ca)(Ti,Zr)O3 lead-free perovskites through artificial control of intermediate grain size†
Dalton Transactions ( IF 4 ) Pub Date : 2018-05-29 00:00:00 , DOI: 10.1039/c8dt01628c
Xiaodong Yan 1, 2, 3, 4 , Mupeng Zheng 1, 2, 3, 4 , Shengjun Sun 1, 2, 3, 4 , Mankang Zhu 1, 2, 3, 4 , Yudong Hou 1, 2, 3, 4
Affiliation  

In this study, (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 (BCTZ) lead-free ceramics with enhanced energy density were prepared by two-step sintering. All ceramics fall into the rhombohedral–orthorhombic–tetragonal (R–O–T) phase boundary near room temperature, and a dense microstructure with an intermediate grain size was observed. The enhanced piezoelectric and energy harvesting properties were attained over a wide grain size range of 10–15 μm, benefiting from the construction of the R–O–T phase boundary. Most interestingly, the maximum values of d33 and d33 × g33 (530 pC N−1 and 9720 × 10−15 m2 N−1) can be achieved at 1500/1350 °C with a grain size of 13.7 μm. The interpretation of the underlying mechanism related to domain and defect engineering has been investigated systematically. Furthermore, a high output power of 99 μW and an energy conversion efficiency of 10% were obtained at a simple cantilever energy harvester fabricated from a 1500/1350 °C specimen under an acceleration of 1.0g, making the current system very promising for piezoelectric energy harvesting applications.

中文翻译:

通过人工控制中间晶粒尺寸来 提高(Ba,Ca)(Ti,Zr)O 3无铅钙钛矿中的能量收集性能

在本研究中,通过两步烧结制备了具有高能量密度的(Ba 0.85 Ca 0.15)(Ti 0.9 Zr 0.1)O 3(BCTZ)无铅陶瓷。所有陶瓷均在室温附近落入菱形-斜方晶-四方(R–O–T)相界,并且观察到具有中等晶粒尺寸的致密微观结构。得益于R–O–T相界的构建,在10–15μm的较宽晶粒尺寸范围内,压电和能量采集性能得到了增强。最有趣的是d 33d 33 × g 33(530 pC N -1在1500/1350°C时可以达到9720×10 -15 m 2 N -1),晶粒尺寸为13.7μm。已经对与领域和缺陷工程相关的潜在机制的解释进行了系统的研究。此外,在一个简单的悬臂式能量收集器上,以1500/1350°C的样品在1.0 g的加速度下,获得了99μW的高输出功率和10%的能量转换效率,这使得当前系统非常有希望获得压电能量收获应用。
更新日期:2018-05-29
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