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熔盐法合成Na0.5K0.5NbO3粉体
引用本文:范亚红,孙清池,王裕斌,潘铁政,陆翠敏. 熔盐法合成Na0.5K0.5NbO3粉体[J]. 功能材料, 2005, 36(12): 1974-1976
作者姓名:范亚红  孙清池  王裕斌  潘铁政  陆翠敏
作者单位:天津大学,材料科学与工程学院,天津,300072;天津大学,材料科学与工程学院,天津,300072;天津大学,材料科学与工程学院,天津,300072;天津大学,材料科学与工程学院,天津,300072;天津大学,材料科学与工程学院,天津,300072
基金项目:Supported by National Natural Science Foundation of China(10232030)
摘    要:采用熔盐法在K2CO3和Na2CO3的熔盐(K2CO3/Na2CO3=45/55)中800℃并保温2h的条件下制备出了单相、纯钙态矿型结构的Na0.5K0.5NbO3粉体,运用XRD以及SEM技术对所得粉体进行了相组成及显微结构分析。结果表明:随着盐含量的增加,晶体结构从正交相转变为四方相,晶粒大小先增加而后稍微减小,并且获得较好的介电压电性:ε33^T/ε0(1kHz)=45-264,tgδ=1.5%~2.6%,Tc=402℃,Tτ-o=202℃,d33=88-98pC/N,Qm=465-574,Kp=29.09%~30.47%,在10kHz频率下,介电损耗有一点改变。NKN将有可能成为用于高频下的无铅压电陶瓷之一。

关 键 词:无铅压电陶瓷  熔盐法  XRD  介电压电性
文章编号:1001-9731(2005)12-1974-03
收稿时间:2005-02-25
修稿时间:2005-06-04

The preparation of (Na0.5K0.5) NbO3 powder by molten salt synthesis
FAN Ya-hong,SUN Qing-chi,WANG Yu-bin,PAN Tie-zheng,LU Cui-min. The preparation of (Na0.5K0.5) NbO3 powder by molten salt synthesis[J]. Journal of Functional Materials, 2005, 36(12): 1974-1976
Authors:FAN Ya-hong  SUN Qing-chi  WANG Yu-bin  PAN Tie-zheng  LU Cui-min
Affiliation:Department of Materials Engineering, Tianjin University, Tianjin 300072, China
Abstract:The (Na0.5K0.5)NbO3 powder with single-phase, pure perovskite was prepared at 800℃ for 2h in molten salt (K2CO3/Na2CO3 =45/55),which was characterized by the X-ray diffraction and SEM technique. It was found that the crystal structure changes from orthorhombic phase to tetragonal phase and grain size increases and then reduces a little with the increasing of salt.Good dielectric and piezoelectric properties can be observed: εT33/ε0 (1kHz) = 45 ~ 264, tgδ= 1.5 % ~ 2.6%, Tc = 402 ℃, TT-o =202℃ ,d33 =88~98pC/N, Qm =465~574, Kp =29.09%~30.47% and in the frequency of 10kHz, the dielectric loss changed a little.
Keywords:lead free piezoelectric ceramics   molten salt synthesis   X-ray diffraction   dielectric and piezoelectric properties
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