Microwave Dielectric Properties of Na0.5+ x Nd0.5TiO3 Ceramics (x=-0.05~0.1)

3rd International Conference on Advanced Materials Research and Applications

Tang, B.^1 ; Fang, Z.X.^1 ; Zhou, L.^1 ; Zhang, S.R.^1

State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu

610054, China^1

关键词: Cubic perovskite;    Densification process;    Microwave dielectric properties;    Non-stoichiometry;    Secondary phase;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/170/1/012011/pdf
DOI  :  10.1088/1757-899X/170/1/012011

来源: IOP

【 摘 要 】

The influence of nonstoichiometry of Na on micronmicrowave dielectric properties of Na0.5+xNd0.5TiO3(NxNT) ceramics was systematically investigated in this research. The main phase of samples was indexed as cubic perovskite structure, and Nd0.667TiO3was detected as secondary phase (-0.05 ≤ x ≤0), which was caused by the evaporation of Na ions. As x was increased from 0 to 0.05, the Nd0.667TiO3phase was effectively eliminated and the densification process was improved. Therefore, the rand Q×f initially increased, later they decreased, which was accordance to the change of density. The τfvalue didn't show a dramatic change, and a relatively low value of 248.2 ppm/°C was obtained at x=0.05. Excellent microwave dielectric properties of r=110, Q×f=8115 GHz and τf=248.2 ppm/°C) were.