本文選題：能量收集器 + 熱釋電材料��； 參考：《華中科技大學(xué)》2015年碩士論文

【摘要】：隨著環(huán)境能量收集研究的逐步深入,熱能的利用也受到越來(lái)越多的關(guān)注。除了利用溫差發(fā)電的熱電能量收集外,利用溫度變化率的熱釋電能量收集也逐步開(kāi)展起來(lái)。熱釋電材料常用于制作紅外探測(cè)器,在能量收集方面的研究不如前者廣泛和深入。但熱釋電能量收集器結(jié)構(gòu)簡(jiǎn)單、清潔環(huán)保、安全可靠等優(yōu)點(diǎn),使之成為當(dāng)前能量收集領(lǐng)域的重要課題。為了提高熱釋電能量收集效率,在熱釋電材料、器件結(jié)構(gòu)、受熱方式等方面亟待進(jìn)行深入研究。本文使用鈮錳酸鉛-銻錳酸鉛-鋯鈦酸鉛(PMn N-PMS-PZT)陶瓷材料制作熱釋電能量收集單元,研究了能量收集器的電學(xué)特性。首先,選用固相法制備了PMn N-PMS-PZT熱釋電陶瓷材料,研究了不同Zr/Ti對(duì)材料綜合性能的影響。實(shí)驗(yàn)結(jié)果表明,當(dāng)Zr/Ti為95/5時(shí),其熱釋電系數(shù)在28℃時(shí)達(dá)到峰值26.5×10-4 C/m2℃,工作溫區(qū)寬度為25~60℃,與本實(shí)驗(yàn)制備的其他組分陶瓷相比,其介電損耗最小,飽和極化強(qiáng)度和剩余極化強(qiáng)度均最大,是制備熱釋電能量收集器的綜合性能好的陶瓷材料。然后,選取Zr/Ti為95/5組分的PMn N-PMS-PZT陶瓷材料制作了單片、并聯(lián)陣列和疊層三種結(jié)構(gòu)的熱釋電能量收集器,研究了熱釋電能量收集器件電荷收集特性與器件結(jié)構(gòu)的關(guān)系。實(shí)驗(yàn)得出單片、三片并聯(lián)陣列和疊層結(jié)構(gòu)樣品最大面電荷密度分別為7.19×10-6 C/cm2、6.59×10-6 C/cm2和14.25×10-6 C/cm2,其中疊層結(jié)構(gòu)樣品電荷收集特性最好。最后,采用珀?duì)柼訜崂鋮s的方法,研究了單片Zr/Ti為95/5組分的PMn N-PMS-PZT陶瓷熱釋電器件樣品的溫度T(t)、電壓U(t)、電流I(t)曲線和能量收集特性與溫度變化頻率的關(guān)系。實(shí)驗(yàn)結(jié)果表明,70 m Hz為其最優(yōu)溫度變化頻率,此時(shí)器件輸出電壓最大值為1.961V,收集能量為1.592μJ,功率密度為3.138μW/cm3,與PZT-5H材料相比,PMn N-PMS-PZT陶瓷熱釋電能量收集器性能更佳。綜上所述,Zr/Ti為95/5組分的PMn N-PMS-PZT陶瓷綜合性能好,適用于熱釋電能量收集器件的制作;疊層結(jié)構(gòu)熱釋電能量收集器具有吸熱散熱效果好、單位體積有效面積較大、易于實(shí)現(xiàn)系統(tǒng)小型化和集成化等優(yōu)點(diǎn),在超低頻率、低功耗器件與無(wú)線網(wǎng)絡(luò)系統(tǒng)中具有潛在的應(yīng)用價(jià)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.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TQ174.1

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