摘要
采用电子陶瓷法制备出(1-x)Bi1/2Na1/2TiO3-xBaTiO3(简写BNBT)无铅压电陶瓷,其中x=0.08,0.1,0.2,0.3,0.4。XRD分析结果表明所制备的样品都生成了纯的钙钛矿结构,并且都为四方相。同时利用电子探针显微镜(EPM)分析技术,研究了BNBT压电陶瓷的形貌。并通过测量样品的压电介电常数,发现所研究的样品的机械品质因数(Qm)在56-74之间,平面机电耦合系数(kp)在0.16左右,频率常数(NФ)在3000左右,并且随着x的增大相对介电常数εT33/ε0逐渐变小;介质损耗tanδ先减小后增大,当x=0.20时出现最小值tanδmin=0.03018;而压电常数d33则先增加后减小,在x=0.10时有最大值d33max=138。从综合性能来看,当x=0.20时性能最好,εT33/ε0=881,tanδ=0.03018,d33=115。
In the paper, (1-x) Bi1/2Na1/2TiO3-xBaTiO3 (BNBT) (x=0.08, 0.1, 0.2, 0.3, 0.4) ceramicsamples were obtained by the solid state reaction method. The pattern of XRD illustrated that the pure perovskite phase (tetragonal) had been obtained for all samples. The microstructure of BNBT was studied by EPM. Meanwhile, piezoelectric and dielectric properties of BNBT were measured: mechanical quality factors (Qm) of all samples were 56-74, planar electromechanical coupling factors(kp) were about 0.16, and frequencyconstants(NФ) were around 3000. With increasing of BaTiO3, the relative dielectric coefficient (εT33/ε0)decreased gradually. When x=0.20, dielectric loss(tanδ) had a minimum, tanδmin=0.03018. When x=0. 10, piezoelectric coefficient(d33) reached a maximum, d33max=138. Among all samples, the total performancesof 0.80 Bi1/2Na1/2TiO3-0.20BaTiO3 were best, εT33/ ε0=881, tan δ=0.03018, d33=115.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2005年第3期27-30,共4页
China Ceramics
基金
江西省自然科学基金
项目编号
0450023
景德镇市科学技术委员会项目
