BCZT无铅压电陶瓷的水热法制备及其性能  

Preparation of BCZT Lead-Free Piezoelectric Ceramics via Hydrothermal Method and Their Performance

作　　者：卢晓羽 方必军[1] 姜彦[1] 丁建宁[1] 赵祥永[2] 罗豪甦[3] 

机构地区：[1]常州大学材料科学与工程学院江苏省光伏科学与工程协同创新中心,江苏常州213164 [2]上海师范大学光电材料与器件重点实验室上海师范大学物理系,上海200234 [3]中国科学院无机功能材料与器件重点实验室,上海201800

出　　处：《硅酸盐学报》2017年第9期1280-1287,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51577015);江苏省产学研合作前瞻性联合研究项目(BY2015027-220);江苏高校优势学科建设工程资助

摘　　要：通过水热反应法低温烧结制备Ba_(0.85)Ca_(0.15)Zr_(0.1)Ti_(0.9)O_3(BCZT)无铅压电陶瓷,研究了烧结温度和时间对BCZT陶瓷的晶体结构和电学性能的影响。与固相反应法相比,由于水热法制备的BCZT前驱体的高活性,可以低温烧结制备BCZT陶瓷,低温烧结制备的BCZT陶瓷呈现纯钙钛矿结构、较为均匀的小晶粒微观形貌(小于10μm)和更高的致密度。通过水热法制备的BCZT陶瓷呈现优良的电学性能,其介电响应特征接近正常铁电体、又呈现一定的频率色散现象。1 340℃烧结18 h制备的BCZT陶瓷的剩余极化强度最大,Pr=6.84μC/cm2。1 320℃烧结18 h制备的BCZT陶瓷压电性能最佳,d33达到最大值213 p C/N。Ba0.85Ca0.15Zr0.1Ti0.9O3（BCZT） lead-free piezoelectric ceramics were prepared via a hydrothermal method and low-temperature sintering. The effects of sintering temperature and time on the crystal structure and electrical properties of the BCZT ceramics were investigated. Compared to a solid-state reaction method, the BCZT ceramics can be synthesized at low sintering temperatures due to the higher sintering capability of the BCZT precursor prepared by the hydrothermal method. The low-temperature sintered BCZT ceramics exhibit a pure perovskite structure, rather homogenous microstructural morphology, smaller grain sizes （i.e., 〈10 μm）, and higher relative density. The BCZT ceramics prepared via the hydrothermal method exhibit excellent electrical properties, in which their dielectric response behavior approaches normal ferroelectrics, and presents a slight dielectric frequency dispersion as well. The BCZT ceramic sintered at 1 340 ℃ for 18 h presents the maximum remnant polarization （i.e., Pr=6.84 μC/cm^2）. The BCZT ceramic sintered at 1 320 ℃ for 18 h exhibits the maximum piezoelectric constant （i.e., 213 pC/N）.

关 键 词：水热反应法 锆钛酸钡钙 钙钛矿结构 电学性能 

分 类 号：TM282[一般工业技术—材料科学与工程]