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Lead-free Ba(1-x)SrxTiO3 ceramics for room-temperature pyroelectric energy conversion
【文件类型】 【消费金额】2.1 【文章页数】7 【会员操作】  
【文章作者】Fan, Baoyan;Yang, Guang;Li, Ming-Yu;Liu, Pin;Qiu, Shiyong;Shen, Meng;Liu, Huan;Zhang, Guangzu;Wang, Qing;Jiang, Shenglin
【文章摘要】      Lead-free Ba(1-x)SrxTiO3 (BST) ceramics were fabricated to convert near-room-temperature waste heat to electric energy for creating self-powered and 'battery-less' systems. In comparison to thermoelectrics that are specifically used for harvesting heat with stable temperature span, pyroelectric converters based on Olsen cycle mechanism can harvest heat with temperature-vibration environment. Large energy conversion density (N-D) was obtained in BST ceramics within the narrower temperature gradient (< 60 degrees C). In terms of the diffused phase transition (DPT) in BST ceramics, the extra slim hysteresis loops processed relatively low coercive field (E-c) and hysteresis loss, which can effectively enhance the No owing to the wider electrical field interval. The effect of Curie temperature (T-c) tuned by the ratios of Ba/Sr on N-D and applicable range of temperature were also systematically examined. At the same electrical field difference (07 MV/m), the optimal energy conversion properties were gained around the T-c, e.g., 0.36 J/cm(3) for BST66/(3)4 (T-c = 23 degrees C) within a temperature range between 25 degrees C and 65 degrees C, and 0.48 J/cm(3) for BST72/28 (T-c = 43 degrees C) between 25 degrees C and 85 degrees C.
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【卷】44【ISSUE】7【ISSUEID】815C0073    【文章期份】2018    【发布日期】2018/8/28 16:25:13    点击率:0    打印    关闭
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