BNT基无铅压电陶瓷掺杂改性的研究现状及发展趋势

综述了近几年Bi_（0.5）Na_（0.5）TiO_3（BNT）基无铅压电陶瓷体系掺杂改性方面的研究成果及发展现状。阐述了不同添加物对掺杂改性的作用机理,总结了BNT基无铅压电陶瓷制备的新工艺、新方法及其新进展,同时对BNT基无铅压电陶瓷的发展趋势做了展望。     

Na0.5Bi0.5TiO3基无铅压电陶瓷研究与应用的新进展

综述了钙钛矿结构的Na0.5Bi0.5TiO3(简称BNT)基无铅压电陶瓷的研究现状,并与其它无铅基压电陶瓷进行了对比.列举了近年来BNT 基压电陶瓷的新发展和热门体系,结合笔者承担的相关研究工作内容,总结和指出了BNT基无铅压电陶瓷新的研究思路和相关方向.     

Bi1/2Na1/2TiO3无铅压电陶瓷的研究进展

近年来,随着环境保护和人类社会可持续发展的需求,作为环境友好的铁电压电陶瓷典型代表的Bi1／2Na1／2TiO3(BNT)基无铅压电陶瓷,已成为世界发达国家致力研发的热点材料之一。本文结合目前有关BNT基无铅压电陶瓷的报道,探讨了BNT压电瓷的压电机理及其相变过程,着重介绍了BNT压电陶瓷制备工艺以及改性研究和目前的应用,并对BNT基无铅压电陶瓷未来的发展趋势作了展望。     

稀土氧化物对Na_(0.5)Bi_(0.5)TiO_3基无铅压电陶瓷结构和性能的影响

综述了稀土氧化物在Na0.5Bi0.5TiO3(BNT)基无铅压电陶瓷中的应用现状和发展前景,并阐述了稀土氧化物在BNT基无铅压电陶瓷中的作用机理。     

(Na1/2Bi1/2)TiO3系无铅压电陶瓷材料研究进展

概述了近年来国内外(Na1/2Bi1/2)TiO3(BNT)基无铅压电陶瓷的研究近况。主要介绍BNT陶瓷及BNT基陶瓷的研究工作。通过非化学计量掺杂及A位空位的存在，使BNT基陶瓷的电性能得到了较大的提高。     

Bi0.5Na0.5TiO3基无铅压电陶瓷的研究进展

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.由于钛酸铋钠(Bi0.5Na0.5TiO3,简称为BNT)基无铅压电陶瓷具有良好的铁电性和高的剩余极化引起了广大学者的关注.本文分析了BNT基无铅压电陶瓷的研究进展,其中晶粒取向生长技术是提高其压电性能的一个重要途径.本文还介绍了一种溶剂热法制备织构化BNT基无铅压电陶瓷的方法.     

无铅压电陶瓷的研究与展望

综述了无铅压电陶瓷研究开发的相关进展,着重介绍了BaTiO3基无铅压电陶瓷、Bi1/2Na1/2TiO3(BNT)基无铅压电陶瓷、NaNbO3基无铅压电陶瓷、铋层状结构无铅压电陶瓷及钨青铜结构无铅压电陶瓷等不同陶瓷种类的相关体系、制备方法及压电铁电性能,并对其应用及发展前景进行了展望。     

无铅压电陶瓷的最新研究进展

介绍了铋层状结构无铅压电陶瓷、钨青铜结构无铅压电陶瓷、钙钛矿结构无铅压电陶瓷(包括钛酸铋钠Bi_(0.5)Na_(0.5)TiO_3(BNT)基、碱金属铌酸盐K_(0.5)NaO_5NbO_3(KNN)基、钛酸钡BaTiO_3(BT)基压电陶瓷)等不同陶瓷体系的制备方法、压电性能、应用领域及最新进展。最后就无铅压电陶瓷今后的研究提出了几点建议。     

Bi0.5Na0.5TiO3基无铅压电陶瓷设计与制备研究的新进展

综述了Bi0.5Na0.5TiO3(BNW)基无铅压电陶瓷体系研究的最新进展,介绍了BNT基无铅压电陶瓷的设计方法及其制备技术.用自洽场离散变分法(self-consult charge-discrete variation-Xa,SCC-DV-Xa)等计算方法可为设计新型BNT基陶瓷提供重要的理论指导.用湿化学法,包括:溶胶-凝胶法、柠檬酸盐法、水热法等,可以合成BNT基纳米粉体,该类方法制备的BNT基粉体具有良好烧结活性,利于致密化烧结,使材料电性能得到改善.用模板晶粒生长技术可获得晶粒生长定向程度很高的BNT基压电陶瓷材料,进而提高材料在特定方向的压电性能.     

无铅压电陶瓷的研究与应用进展

本文综述了无铅压电陶瓷研究开发的相关进展,着重介绍了钙钛矿结构无铅压电陶瓷(包括BaTiO3(BT)基无铅压电陶瓷、Bi1/2Na1/2TiO3 (BNT)基无铅压电陶瓷、碱金属铌酸盐K1/2Na1/2NbO3(KNN)基无铅压电陶瓷)、钨青铜结构无铅压电陶瓷及铋层状结构无铅压电陶瓷等不同陶瓷种类的相关体系、制备方法及压电铁电性能,并根据相关性能参数分析了无铅压电器件的应用领域,最后对其发展前景进行了展望.     

Selection of Lead‐Free Piezoelectric Ceramics

Lead‐free piezoelectric ceramics are extensively investigated for the alternatives of lead‐based piezoceramics. (K,Na)NbO₃ (KNN), (Bi_0.5Na_0.5)TiO₃ (BNT), and (Bi_0.5K_0.5)TiO₃ (BKT)‐based ceramics are reported as promising piezoelectric material families. Several researchers have reported solid solution of these ceramics using various chemical and physical routes. In this study, we have rank these materials using multiple attribute decision making techniques. KNN‐LT‐LS and 0.7BNT‐0.2BKT‐0.1(Bi_0.5Li_0.5)TiO₃ are found to be top rank in all the materials of respective families under study. We have also reported Pareto‐optimal (nondominated) lead‐free piezoelectric ceramics for d₃₃ and T_c parameters.     

BNT基无铅压电陶瓷材料的溶胶-凝胶法制备及电性能研究

随着人们环保意识的增强,无铅压电陶瓷的研究和开发成为当前压电材料领域研究的热点。本文采用溶胶-凝胶法制备了BNT(钛酸铋钠)粉体,采用干压成型、高温电炉烧成无铅压电陶瓷样品,并对BNT粉体及无铅压电陶瓷样品进行了性能分析与结果讨论。     

Phase Diagrams and Electromechanical Strains in Lead‐Free BNT‐Based Ternary Perovskite Compounds

Lead‐free compounds based on perovskite solid solutions in the ternary system (Bi_0.5Na_0.5)TiO₃‐MeNbO₃‐SrTiO₃ (BNT‐MeNbO₃‐ST, Me=K, Na,(K_0.5Na_0.5)) were fabricated using a conventional solid‐state reaction method. The effect of ST addition to BNT‐MeNbO₃ ceramics on the strain behavior, dielectric, ferroelectric, pyroelectric, and piezoelectric properties was systematically investigated to search the lead‐free piezoelectric materials with an excellent actuating performance. The phase diagrams based on the phase transition temperatures were obtained and the relationship between the phase structure and the electrical properties of the BNT‐MeNbO₃‐ST system has been clarified. A qualitative correlation between the morphotropic phase boundary (MPB)composition and tolerance factor t in BNT‐based systems has also been established and the present work indicates that the t value corresponding to the formation of MPB located in a quite narrow range and provides a guideline to predict the approximate MPB region quickly for new solid solutions. The Raman‐spectra analysis, macroscopic properties, and temperature‐dependent relationships of both polarization and strain demonstrated that the large strain response for this investigated system originates from a field‐induced relaxor to ferroelectric phase transformation.     

无铅压电陶瓷材料研究现状

随着人们环保意识的增强，无铅压电陶瓷材料的研究和应用已日益引起人们的关注。文中综合介绍了铋层状材料和钛酸铋钠基无铅材料的压电特性，总结了各种添加剂对其压电性能的影响机理和规律，介绍了当前以各种工艺对其微观结构和压电性能改进的研究成果，并对2种材料的应用前景进行了展望。     

BNT系无铅压电陶瓷的研究进展

(Bi1/2Na1/2)TiO3基无铅压电陶瓷是目前研究最广泛,最具吸引力的无铅压电陶瓷体系.本文主要综述了近几年国内外专家重点研究的以BNT为基的4类无铅压电陶瓷,并指出目前国内外学者对钛酸铋钠粉体合成的关注.     

New Insight on Sintering Progress of KNN‐Based Lead‐Free Ceramics

0.96(K_0.5Na_0.5)_0.95Li_0.05Nb_0.93Sb_0.07O₃–0.04CaZrO₃ (0.96KNLNS–0.04CZ) lead‐free piezoelectric ceramics have been prepared by a new ceramics sintering progress—three‐step sintering method, via adjusting every step sintering temperature and holding time to improve piezoelectric properties. The result shows that the phase structure of the ceramics was changed from single phase to two phase coexisted by three‐step sintering, meanwhile, orthorhombic–tetragonal phase transition temperature was modified to around zero degree. Remarkably, piezoelectric properties has been obtained in 0.96KNLNS‐0.04CZ ceramics, which piezoelectric parameter is d₃₃ =420 pC/N, K_p =0.485.