本文選題：無鉛壓電陶瓷　切入點：壓電性　出處：《寧波大學》2014年碩士論文　論文類型：學位論文

【摘要】：材料作為信息工業(yè)和社會經(jīng)濟發(fā)展的重要基礎和有力保障，與能源、信息并稱為現(xiàn)代文明的三大支柱，是人類賴以生存和可持續(xù)發(fā)展的重要物質(zhì)基礎。無論是提高人民基本的物質(zhì)文化生活水平，還是鞏固和加強國防工業(yè)等各個領域，都需要高性能、多層次的、大量的高新材料。鋯鈦酸鉛(PZT)基壓電陶瓷在其準同型相界處具有十分大的壓電響應，因此被廣泛應用到制動器、傳感器和其它機電設備。然而，，由于PZT基壓電陶瓷中含有大量氧化鉛成分，在制備PZT基壓電陶瓷的過程中氧化鉛具有十分高的揮發(fā)性，氧化鉛是一種劇毒物質(zhì)，會造成嚴重的鉛污染和環(huán)境問題。因此,開發(fā)能滿足需要的無鉛壓電陶瓷來代替含鉛壓電材料越來越引起大家的關注。 本文主要工作有三大方面：第一方面，利用添加劑La可以使壓電陶瓷在MPB處有更優(yōu)異的壓電響應這一原理，制備出一種新型的鈦酸鹽基壓電陶瓷，研究并探討了(Bi1-xNa0.8K0.2Lax)0.5TiO3(x=0,0.005,0.01,0.02,0.04,0.08)陶瓷體系的壓電性、鐵電性和退極化機制。研究發(fā)現(xiàn)，(Bi0.995Na0.8K0.2La0.005)0.5TiO3陶瓷有最高的壓電性和最強的鐵電性。第二方面，為了研究通過電場誘導產(chǎn)生可逆的弛豫鐵電體相變來獲得高介電儲能密度的鈦酸鹽基陶瓷，選取(1-x)Bi0.47Na0.47Ba0.06TiO3-xKNbO3(BNBT-xKN)(x=0,0.01,0.02,0.04,0.06,0.08)這種陶瓷來研究它的介電儲能性質(zhì)。研究表明在一定溫度范圍內(nèi)BNBT-0.06KN陶瓷表現(xiàn)出很好的溫度穩(wěn)定性和抗疲勞特性，這非常有利于實際應用。第三方面，在前一個實驗的基礎上對(1-x)(Bi0.5Na0.5)TiO3-xKNbO3(BNT-xKN)(x=0,0.06,0.08,0.10,0.12)這個陶瓷體系繼續(xù)進行了介電儲能性質(zhì)的探討。獲得了一個更簡單的化學組成，這有利于鐵電體的良好的一致性和可重復性，因此BNT-xKN比BNBT-xKN體系有更好的應用價值和前景。
[Abstract]:As an important foundation and powerful guarantee for the development of information industry and social economy, materials, together with energy and information, are regarded as the three pillars of modern civilization. It is an important material basis for the survival and sustainable development of mankind. Whether it is to improve the basic material and cultural living standards of the people or to consolidate and strengthen the national defense industry and other fields, it needs high performance and multi-level. A large number of high-tech materials. Lead zirconate titanate PZT-based piezoelectric ceramics have a very large piezoelectric response at its quasi-homogeneous phase boundary, so they are widely used in brakes, sensors and other mechanical and electrical equipment. Due to the large amount of lead oxide in PZT based piezoelectric ceramics, lead oxide is highly volatile in the preparation of PZT based piezoelectric ceramics. Lead oxide is a highly toxic substance, which can cause serious lead pollution and environmental problems. The development of lead-free piezoelectric ceramics to replace lead-containing piezoelectric materials has attracted more and more attention. In this paper, there are three main aspects: firstly, a new type of titanate based piezoelectric ceramics has been prepared by using the principle that La can make piezoelectric ceramics have better piezoelectric response at MPB. The piezoelectric properties, ferroelectric properties and depolarization mechanism of Bi0.995Na0.8K0.2La0.2La0.005TiO0. 005TiO3 ceramics have been studied and discussed. The piezoelectric properties, ferroelectric properties and depolarization mechanism of Bi0.995Na0.8K0.2La0.005La0.005TiO3 ceramics have been studied and discussed. The second aspect is that the piezoelectric properties of Bi0.995Na0.8K0.2La0.005La0.005TiO3 ceramics have the highest piezoelectric properties and the strongest ferroelectric properties. In order to obtain titanate based ceramics with high dielectric storage density, the reversible relaxor ferroelectric phase transition induced by electric field was studied. In order to study the dielectric energy storage properties of BNBT-0.06KN ceramics, the dielectric energy storage properties of BNBT-xKNBO3 (BNBT-xKNO3) BNBT-xKNBO3) were studied. The results show that the dielectric energy storage properties of BNBT-0.06KN ceramics show good thermal stability and fatigue resistance in a certain temperature range, which is very beneficial to practical application. Third, in the third aspect, it is shown that the dielectric energy storage properties of BNBT-0.06KN ceramics are very good in a certain temperature range. On the basis of the previous experiment, the dielectric energy storage properties of this ceramic system, Bi0.5Na0.5Na0.5TiO3-xKNbO3O3, BNT-xKNO3, BNT-xKNO3 (0.06 ~ 0.08) 0.100.12), have been investigated. A simpler chemical composition has been obtained, which is beneficial to the good consistency and repeatability of ferroelectrics. Therefore, BNT-xKN has better application value and prospect than BNBT-xKN system.
【學位授予單位】：寧波大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM282

【共引文獻】

中國期刊全文數(shù)據(jù)庫 前3條

1 鄭凱平;江向平;陳超;李小紅;李璐;;(0.84-x)Na_(0.5)Bi_(0.5)TiO_3-0.16K_(0.5)Bi_(0.5)TiO_(3-x)SrTiO_3系無鉛壓電陶瓷結(jié)構(gòu)與電性能[J];功能材料;2014年04期

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中國博士學位論文全文數(shù)據(jù)庫 前2條

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中國碩士學位論文全文數(shù)據(jù)庫 前10條

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2 鄭凱平;（Na_(0.5)Bi_(0.5)）TiO_3基無鉛壓電陶瓷的結(jié)構(gòu)與電性能研究[D];景德鎮(zhèn)陶瓷學院;2013年

3 伍建華;熔鹽法制備BaTi_2O_5片狀顆粒及其生長機理研究[D];武漢工程大學;2013年

4 王雅靜;鈦酸鉍鈉基薄膜制備及儲能性能[D];哈爾濱工業(yè)大學;2013年

5 劉姣云;NBT-KBT100x鐵電薄膜機電耦合性能及其微懸臂梁致動器[D];湘潭大學;2013年

6 楊慶慶;鈦酸鉍鉀鈉基無鉛壓電陶瓷及其摻雜改性[D];陜西師范大學;2013年

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10 孫海玲;NaNbO_3-LiTaO_3無鉛壓電陶瓷的制備、相結(jié)構(gòu)、電學特性及其變壓器研究[D];四川師范大學;2014年

本文編號：1634198