铌酸钾钠无铅压电陶瓷薄膜的制备方法研究

铌酸钾钠无铅压电陶瓷薄膜具有居里温度高、机电耦合系数高、介电常数低等优点,制备方法种类繁多。综述了铌酸钾钠薄膜的制备技术,包括溶胶-凝胶法、脉冲激光沉积法和磁控溅射法等;讨论了铌酸钾钠薄膜各种方法的制备工艺与功能性质的关系等,指出了各种制备技术的优缺点及发展现状;最后提出了目前铌酸钾钠薄膜制备及应用中存在的一些问题及今后的发展方向。     

铌酸钠钾基无铅压电陶瓷制备技术的比较研究

铌酸钠钾(KNN)基无铅压电陶瓷是目前世界范围内压电铁电材料研究的热点.要是KNN基无铅压电陶瓷得到实际应用,除需开展材料的配方设计研究外,需要针对铌酸盐压电陶瓷的制备技术开展研究,还需要针对该体系陶瓷完成从实验室的试验研究到企业生产的中试技术研究.本文根据在压电铁电材料与器件生产单位开展KNN基无铅压电陶瓷采用的具体两个配方,结合材料在实验中遇到的相关技术难题,对比传统铅基压电陶瓷材料的制备工艺,对KNN基无铅压电陶瓷的制备技术中各工艺(包括称料、混合、预烧、成型、烧结)开展了比较研究,提出了对相关工艺技术进行改进的建议.     

高压电性和织构化无铅压电陶瓷的最新研究进展

近年来,性能优异的无铅压电陶瓷因其环境协调性好、污染小而再度成为研究热点.结合近2年来国内外无铅压电陶瓷的研究现状,主要从陶瓷的制备技术方面综述了目前性能最优的BaTiO3和铌酸盐基织构化无铅压电陶瓷的研究进展.重点介绍了制备压电陶瓷的2种新技术,即工程畴形技术(EDC)和局部化学微晶转化法(TMC).针对现今无铅压电陶瓷的种种不足,对今后压电陶瓷的研究方向作了展望.     

无铅压电陶瓷粉体的制备和晶粒定向生长技术

材料体系及其制备技术是新材料研究中的两个重要内容.从无铅压电陶瓷的粉体制备和晶粒定向生长两方面介绍了无铅压电陶瓷的制备技术研究(如机械化学法、溶胶-凝胶法、反应模板晶粒生长技术等)及其进展,并分析了各种制备方法的优缺点.     

无铅压电陶瓷纳米粉体的制备及其陶瓷性能研究进展

随着经济的发展和人们环保意识的增强,无铅压电陶瓷的研究和开发越来越引起人们的重视.但此类材料的压电性能相对于铅基压电陶瓷来说还存在较大差距,严重制约着它的实际应用.纳米技术的出现和发展为无铅压电陶瓷性能全面达到或超过铅基压电陶瓷提供了很好的机遇和平台.综述了近年来无铅压电陶瓷纳米粉体的合成方法,比较了纳米粉体和普通原料制备的无铅压电陶瓷的性能,展望了无铅压电陶瓷未来的发展和应用前景.通过调控反应参数,得到不同尺寸和形状的纳米粉体,实现无铅压电陶瓷纳米粉体的尺寸和形状均匀且可控,无铅压电陶瓷的性能必将大幅度地提高.     

无铅压电陶瓷与义齿基托树脂结合强度的研究

制备了3种不同类型的无铅压电陶瓷,包括钛酸钡(BT)、钛酸铋钠(BNT)、铌酸钾钠(KNN),用XRD对无铅压电陶瓷进行物相分析;将这3种无铅压电陶瓷与义齿基托树脂聚甲基丙烯酸甲酯(PMMA)粘接,通过粘接剪切强度测试评价了无铅压电陶瓷与义齿基托树脂间的粘接强度.实验结果表明,3种不同的无铅压电陶瓷与义齿基托树脂之间的粘接剪切强度值有统计学的差异(P<0.05),由高到低依次为KNN>BNT>BT;所采用的无铅压电陶瓷与义齿基托树脂之间有良好的粘接性能;粘接破坏形式主要为内聚性破坏.研究结果为无铅压电陶瓷与义齿基托树脂将来在口腔临床治疗中的应用提供了重要的实验依据.     

铌酸钾钠基无铅压电陶瓷的制备工艺技术研究进展

基于对人类生存环境的保护和发展环境友好型材料与电子产品的要求,铌酸钾钠(K0.5Na0.5NbO3,简写为KNN)基无铅压电陶瓷由于其具有优越的电学性能和较高的居里温度而成为目前世界范围内压电铁电材料研究的热点之一。材料制备工艺技术在材料科学技术中占有极其重要的地位。结合国际无铅压电陶瓷的研究情况,综述了近年来铌酸钾钠基无铅压电陶瓷在粉体制备、陶瓷烧结以及陶瓷织构化等制备工艺技术上研究的新进展并展望了其发展趋势。     

铌酸钠钾基无铅压电陶瓷制备技术新进展

碱金属铌酸盐系无铅压电陶瓷以其优越的压电性能和较高居里温度倍受关注.结合目前有关KNbO3-NaNbO3(KNN)基无铅压电陶瓷的报道,综述了近年来铌酸钠钾基无铅压电陶瓷在粉体制备、陶瓷的成型、烧结以及晶粒取向等制备技术研究的新进展,并从不同方面展望了今后铌酸钠钾基无铅压电陶瓷性能研究及其制备技术上可能的进展.     

从发明专利看无铅压电陶瓷的研究与发展--无铅压电陶瓷2O年发明专利分析之一

无铅压电陶瓷的研究与开发已引起世界各国的高度重视.本文综合分析了近20年无铅压电陶瓷发明专利约140篇,从发明专利角度评述了无铅压电陶瓷的研究与发展现状,简要介绍了目前受到广泛研究的BaTiO3(BT)基无铅压电陶瓷、Bi1/2Na1/2TiO3(BNT)基无铅压电陶瓷、铋层状结构无铅压电陶瓷及铌酸盐系无铅压电陶瓷,并侧重介绍这些无铅压电陶瓷的组分、性能和制备方法.从无铅压电陶瓷发明专利的进展可以看出,在过去20年中,为促进人类社会的可持续发展,无铅压电陶瓷得到了广泛的研究和开发,并取得重要进展.     

钛酸铋钠基无铅压电陶瓷的组分设计与性能调控研究进展

钛酸铋钠(Bi0.5Na0.5TiO3,BNT)基无铅压电陶瓷是目前研究最多且极具应用前景的钙钛矿(ABO3)型无铅压电材料之一。最近几年,BNT基无铅压电陶瓷仍然是国际压电铁电材料研究的热点之一。从BNT基无铅压电陶瓷A位和/或B位取代、多组元复合、掺杂离子改性以及制备技术改进等方面,综合介绍了2006年以来国内外的研究进展,特别是准同型相界的构建以及组分设计与性能调控的研究进展,并对今后的研究进行了展望。     

LiTaO3基压电陶瓷的制备与性能研究进展

介绍了LiTaO3的基本性质,综述了LiTaO3基压电陶瓷体系的制备方法、压电铁电性能及应用背景,指出了目前相关研究的重点和难点,并展望了LiTaO3基压电陶瓷今后的研究和发展方向.     

LiNbO3基无铅压电陶瓷的研究与进展

LiNbO3基无铅压电陶瓷近年来受到各国学者的关注．已成为继BNT之后的又一重要的无铅压电陶瓷研究体系。本文结合近年来有关LiNbO3基无铅压电陶瓷的研究论文及近20年的发明专利公报,归纳和分析了LiNbO3基无铅压电陶瓷的研究开发进展,着重介绍了LiNbO3基无铅压电陶瓷的主要体系及制备方法、压电铁电性能,并对LiNbO3基无铅压电陶瓷今后的研究和发展提出一些建议。     

Review: environmental friendly lead-free piezoelectric materials

Lead zirconate titanate (PZT) based piezoelectric materials are well known for their excellent piezoelectric properties. However, considering the toxicity of lead and its compounds, there is a general awareness for the development of environmental friendly lead-free materials as evidenced from the legislation passed by the European Union in this effect. Several classes of materials are now being considered as potentially attractive alternatives to PZTs for specific applications. In this paper, attempts have been made to review the recent developments on lead-free piezo materials emphasizing on their preparation, structure–property correlation, etc. In this context, perovskite systems such as bismuth sodium titanate, alkali niobates (ANbO₃), etc. and non-perovskites such as bismuth layer-structured ferroelectrics are reviewed in detail. From the above study, it is concluded that some lead-free compositions show stable piezoelectric responses even though they do not match the overall performance of PZT. This has been the stimulant for growing research on this subject. This topic is of current interest to the researchers worldwide as evidenced from the large number of research publications. This has motivated us to come out with a review article with a view that it would give further impetus to the researchers already working in this area and also draw the attention of the others.     

Bi0.5Na0.5 TiO3基无铅压电陶瓷应用的研究进展

随着人们环保意识的增强,作为环境友好型的无铅压电陶瓷典型代表Bi0.5Na0.5TiO3基压电陶瓷已成为压电陶瓷领域研发的热点材料之一.结合目前有关报道,着重介绍了近年来国内外该陶瓷在相关电子器件中的应用,并展望了BNT基无铅压电陶瓷应用的发展趋势.     

铌酸盐系无铅压电陶瓷的研究与进展--无铅压电陶瓷20年专利分析之四

综合分析和评述了近20年的铌酸盐系无铅压电陶瓷发明专利，着重介绍了主要的铌酸盐系无铅压电陶瓷相关体系及其压电铁电性能和制备工艺技术，并展望了铌酸盐系无铅压电陶瓷今后研究和发展的几个方面。特别是对NaNbO3、Sr2NaNb5O15体系以及相关钨青铜结构体系的改性、复合和理论研究，提出了具体的建议。     

Progress in engineering high strain lead-free piezoelectric ceramics

Abstract

Environmental concerns are strongly driving the need to replace the lead-based piezoelectric materials currently employed as multilayer actuators. The current review describes both compositional and structural engineering approaches to achieve enhanced piezoelectric properties in lead-free materials. The review of the compositional engineering approach focuses on compositional tuning of the properties and phase behavior in three promising families of lead-free perovskite ferroelectrics: the titanate, alkaline niobate and bismuth perovskites and their solid solutions. The ‘structural engineering’ approaches focus instead on optimization of microstructural features including grain size, grain orientation or texture, ferroelectric domain size and electrical bias field as potential paths to induce large piezoelectric properties in lead-free piezoceramics. It is suggested that a combination of both compositional and novel structural engineering approaches will be required in order to realize viable lead-free alternatives to current lead-based materials for piezoelectric actuator applications.     

Multiferroic bismuth ferrite-based materials for multifunctional applications: Ceramic bulks,thin films and nanostructures

Among the different types of multiferroic compounds, bismuth ferrite (BiFeO₃; BFO) stands out because it is perhaps the only one being simultaneously magnetic and strongly ferroelectric at room temperature. Therefore, in the past decade or more, extensive research has been devoted to BFO-based materials in a variety of different forms, including ceramic bulks, thin films and nanostructures. Ceramic bulk BFO and their solid solutions with other oxide perovskite compounds show excellent ferroelectric and piezoelectric properties and are thus promising candidates for lead-free ferroelectric and piezoelectric devices. BFO thin films, on the other hand, exhibit versatile structures and many intriguing properties, particularly the robust ferroelectricity, the inherent magnetoelectric coupling, and the emerging photovoltaic effects. BFO-based nanostructures are of great interest owing to their size effect-induced structural modification and enhancement in various functional behaviors, such as magnetic and photocatalytic properties. Although to date several review papers on BFO and BFO-based materials have been published, they were each largely focused on one particular form of BFO. There have been very few papers addressing the different forms of BFO in a comprehensive manner and providing a comparison across the different forms. As BFO has been extensively studied over the past more than one decade especially in the past several years, there have been new phenomena arising more recently. Naturally they were not included in the early reviews. Here, we provide an updated comprehensive review on the progress of BFO-based materials made in the past fifteen years in the different forms of ceramic bulks, thin films and nanostructures, focusing on the pathways to modify different structures and to achieve enhanced physical properties and new functional behavior. We also prospect the future potential development for BFO-based materials in the cross disciplines and for multifunctional applications. We hope that this comprehensive review will serve as a timely updating and reference for researchers who are interested in further exploring bismuth ferrite-based materials.     

(Bi0.5Na0.5)TiO3(BNT)基无铅压电陶瓷研究进展

(Bi0.5Na0.5)TiO3(BNT)基无铅压电陶瓷体系是目前研究最广泛的功能陶瓷材料之一.综述了BNT基无铅压电陶瓷的研究现状,讨论了相关体系的设计方法、铁电性、压电性以及BNT体系的制备方法.分析比较了BNT系压电陶瓷与Pb(Zr,Ti)O3(PZT)压电陶瓷的性能差异以及存在的问题,对BNT基无铅压电陶瓷进行了展望.