摘要
采用传统固相法制备了Na0.25K0.25Bi2.5–xHoxNb2O9(NKBN–x Ho^3+,0.000≤x≤0.030)铋层状陶瓷,研究了Ho^3+掺杂对NKBN陶瓷结构、电学和上转换发光性能的影响。X射线衍射谱表明Ho^3+进入NKBN晶格形成了固溶体。随着Ho^3+掺杂量的增加,NKBN陶瓷的晶粒尺寸降低,当x=0.020时,样品的压电和铁电性能均达到最佳:d33=21.8pC/N2Pr=1.84μC/cm。(d33为压电常数,Pr为剩余极化强度)所有样品在400℃均未出现明显的退极化现象,在高温下表现出良好的压电稳定性。在980 nm激光激发下,所有陶瓷样品均表现出上转换荧光发光特性,表明NKBN–x Ho^3+陶瓷在光电多功能材料领域具有潜在的应用价值。随着极化电压的增加,陶瓷样品的晶格结构对称性提高,上转换荧光发光强度降低。
Na0.25K0.25Bi2.5–xHoxNb2O9(NKBN–x Ho^3+,0.000≤x≤0.030)bismuth layered ceramics were prepared by a conventional solid-state method.Effect of Ho^3+doping on the structural,electrical properties and up-conversion luminescence properties of NKBN ceramics was investigated.Based on the results by X-ray diffraction results,Ho^3+enters into the NKBN lattice and forms a solid solution.The grain size of NKBN samples decreases with the increased of Ho^3+doping.The optimum piezoelectric and ferroelectric properties of ceramic can be obtained as x=0.020,i.e.,d33=21.8 pC/N,2 Pr=1.84μC/cm2,where d33 is piezoelectric constant and Pr is remanent polarization.All the samples show little depolarization at 400℃,thus having a good thermal stability.Under the excitation of 980 nm laser,all the samples have the characteristics of up-conversion fluorescence luminescence,indicating that NKBN–x Ho^3+ceramics can offer a potential application for optical-electrical multifunctional materials.The lattice structure symmetry of ceramic samples increases and the up-conversion fluorescence luminescence intensity reduces with the increase of polarization voltage.
作者
陈子龙
江向平
陈超
黄枭坤
江兴安
胡浩
CHEN Zilong;JIANG Xiangping;CHEN Chao;HUANG Xiaokun;JIANG Xing’an;HU Hao(Jiangxi Key Laboratory of Advanced Ceramic Materials,School of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333001,Jiangxi,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2020年第7期1090-1096,共7页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(51762024,51562014,51862016,51602135)
江西省自然科学基金(20171BAB216012,20192BAB206008,20192BAB212002)
江西省教育厅科技项目(GJJ180718,GJJ180739)。
关键词
铋层状结构
压电性能
退极化
上转换发光
bismuth layered structure
piezoelectric properties
depolarization
up-conversion luminescence
