钬离子掺杂Na_(0.5)Bi_(8.5)Ti_7O_(27)铋层状结构陶瓷的电学性能与上转换发光光谱研究  

Electrical and Up-conversion Photoluminescence Properties of Ho^(3+)-doped Na_(0.5)Bi_(8.5-x)Ho_xTi_7O_(27) Bismuth Layered Lead-Free Piezoelectric Ceramics

作　　者：江福兰 汪鹏彬 江向平 JIANG Fulan;WANG Pengbin;JIANG Xiangping(Jingdezhen Ceramic Institute,Jingdezhen 333403,Jiangxi,China)

机构地区：[1]景德镇陶瓷大学,江西景德镇333403

出　　处：《陶瓷学报》2018年第6期696-702,共7页Journal of Ceramics

基　　金：国家自然科学基金(51762024;51562014;51602135);江西省自然科学基金(20171BAB216012);江西省教育厅科技项目(GJJ170789;GJJ160894;GJJ170804;GJJ170794)

摘　　要：采用固相法制备Ho^(3+)离子掺杂铋层状结构Na_(0.5)Bi_(8.5-x)Ho_xTi_7O_(27)(NBT-BIT-xHo^(3+),0≤x≤0.02),研究了不同Ho^(3+)含量对样品的结构、电学与上转换发光性能的影响。所有样品均为单相的共生结构,Ho^(3+)掺杂未引入其他杂相;适量Ho^(3+)离子掺杂使样品的居里温度升高、介电损耗降低、压电常数d_(33)得到提高;当x=0.01时,样品具有最佳的综合电学性能,介电损耗tanδ=0.78%、压电性能d_(33)=21pC/N、Q_m=2887。在980 nm的红外激光对NBT-BIT-xHo^(3+)陶瓷的激发下,从所有样品的上转换发光图谱可以观测到位于550 nm附近较强的绿光和657 nm附近较为微弱的红光,对应于~5S_2/~5F_4→~5I_8和~5F_5→~5I_8的跃迁。随着Ho^(3+)离子浓度的增加,样品的发光颜色从黄绿色向绿色转变。Up-conversion(UC)and electrical properties of Na0.5Bi8.5-xHoxTi7O27(NBT-BIT-xHo^3+,0≤x≤0.02)bismuth layered lead-free piezoelectric ceramics were studied.Results show that all the NBT-BIT-xHo^3+samples possessed a single-phase inter-growth structure.With Ho^3+concentration increasing,the Curie temperature Tc increased from 650°C to 668°C.The electrical properties of the samples can be optimized by the addition of Ho^3+content,and the sample with x=0.01 has the optimum electrical properties:d33=21pC/N,Qm=2887,tanδ=0.78%.Under the 980 nm near infrared excitation,NBT-BIT-xHo^3+samples give off green and red emissions corresponding to the ^5S2/^5F4→^5I8(550 nm)and ^5F5→^5I8(657 nm)transitions,respectively.The emission colors of NBT-BIT-xHo^3+ceramic samples are adjustable from yellowgreen to green by changing Ho^3+concentration.The NBT-BIT-xHo^3+ceramics have potential applications for high temperature piezoelectric and electro-optical integration devices.

关 键 词：铋层状结构 压电陶瓷 光致发光 介电性 

分 类 号：TQ174.75[化学工程—陶瓷工业]