铌锰酸铅—锑锰酸铅—锆钛酸铅热释电陶瓷能量收集器研究

发布时间：2018-05-26 03:41

本文选题：能量收集器 + 热释电材料　；参考：《华中科技大学》2015年硕士论文

【摘要】：随着环境能量收集研究的逐步深入,热能的利用也受到越来越多的关注。除了利用温差发电的热电能量收集外,利用温度变化率的热释电能量收集也逐步开展起来。热释电材料常用于制作红外探测器,在能量收集方面的研究不如前者广泛和深入。但热释电能量收集器结构简单、清洁环保、安全可靠等优点,使之成为当前能量收集领域的重要课题。为了提高热释电能量收集效率,在热释电材料、器件结构、受热方式等方面亟待进行深入研究。本文使用铌锰酸铅-锑锰酸铅-锆钛酸铅(PMn N-PMS-PZT)陶瓷材料制作热释电能量收集单元,研究了能量收集器的电学特性。首先,选用固相法制备了PMn N-PMS-PZT热释电陶瓷材料,研究了不同Zr/Ti对材料综合性能的影响。实验结果表明,当Zr/Ti为95/5时,其热释电系数在28℃时达到峰值26.5×10-4 C/m2℃,工作温区宽度为25~60℃,与本实验制备的其他组分陶瓷相比,其介电损耗最小,饱和极化强度和剩余极化强度均最大,是制备热释电能量收集器的综合性能好的陶瓷材料。然后,选取Zr/Ti为95/5组分的PMn N-PMS-PZT陶瓷材料制作了单片、并联阵列和叠层三种结构的热释电能量收集器,研究了热释电能量收集器件电荷收集特性与器件结构的关系。实验得出单片、三片并联阵列和叠层结构样品最大面电荷密度分别为7.19×10-6 C/cm2、6.59×10-6 C/cm2和14.25×10-6 C/cm2,其中叠层结构样品电荷收集特性最好。最后,采用珀尔帖片加热冷却的方法,研究了单片Zr/Ti为95/5组分的PMn N-PMS-PZT陶瓷热释电器件样品的温度T(t)、电压U(t)、电流I(t)曲线和能量收集特性与温度变化频率的关系。实验结果表明,70 m Hz为其最优温度变化频率,此时器件输出电压最大值为1.961V,收集能量为1.592μJ,功率密度为3.138μW/cm3,与PZT-5H材料相比,PMn N-PMS-PZT陶瓷热释电能量收集器性能更佳。综上所述,Zr/Ti为95/5组分的PMn N-PMS-PZT陶瓷综合性能好,适用于热释电能量收集器件的制作;叠层结构热释电能量收集器具有吸热散热效果好、单位体积有效面积较大、易于实现系统小型化和集成化等优点,在超低频率、低功耗器件与无线网络系统中具有潜在的应用价值。
[Abstract]:With the gradual deepening of environmental energy collection and research, more and more attention has been paid to the utilization of thermal energy. In addition to the use of thermoelectric energy collection of thermoelectric power generation, the collection of pyroelectric energy using the temperature change rate is also gradually developed. However, the pyroelectric energy collector has the advantages of simple structure, clean environmental protection, safe and reliable and so on. It has become an important subject in the field of energy collection. In order to improve the efficiency of pyroelectric energy collection, the pyroelectric materials, device structure, heating mode and so on need to be further studied. This paper uses lead niobate lead antimony manganate - zirconium Lead titanate (PMn N-PMS-PZT) ceramic materials are used to make a pyroelectric energy collection unit and study the electrical properties of the energy collector. First, the PMn N-PMS-PZT pyroelectric ceramics are prepared by solid phase method. The effect of different Zr/Ti on the comprehensive properties of the materials is studied. The experimental results show that when Zr/Ti is 95/5, the pyroelectric coefficient is reached at 28. At the peak of 26.5 x 10-4 C/m2 C, the width of the working temperature area is 25~60 C, and the dielectric loss is the smallest, the saturation polarization strength and the residual polarization are the largest, which is the best comprehensive ceramic material for the preparation of the pyroelectric energy collector. Then, the PMn N-PMS-PZT ceramics with Zr/Ti as the 95/5 component are selected. The thermoluminescence energy collector of three kinds of monolithic, parallel and laminated structures is made. The relationship between the charge collection characteristics and the device structure of the pyroelectric energy collection device is studied. The experiment shows that the maximum surface charge density of the three parallel arrays and the laminated structure samples is 7.19 * 10-6 C/cm2,6.59 x 10-6 C/cm2 and 14.25 x 10-6 C/cm respectively. 2, the charge collection characteristics of the laminated structure are the best. Finally, the relationship between temperature T (T), voltage U (T), current I (T) curve and energy collection specificity and temperature change frequency of PMn N-PMS-PZT ceramic thermoluminescence samples with a single Zr/Ti 95/5 component is studied by heating and cooling method. The experimental results show that the 70 m Hz is the same. The optimum temperature change frequency is at this time the maximum output voltage of the device is 1.961V, the collection energy is 1.592 mu J and the power density is 3.138 W/cm3. Compared with the PZT-5H material, the PMn N-PMS-PZT ceramic thermoluminescence collector has better performance. To sum up, the PMn N-PMS-PZT ceramics with 95/5 component is good, suitable for the collection of pyroelectric energy. The laminated structure thermoluminescence collector has the advantages of good heat absorption and heat dissipation, large unit volume effective area, easy to realize the miniaturization and integration of the system. It has potential application value in ultra low frequency, low power device and wireless network system.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ174.1

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