Microwave Dielectric Properties of Na1/2Sm1/2Ti1-x (Cr1/2Nb1/2) x O3 Ceramics (x=0~0.025)

3rd International Conference on Advanced Materials Research and Applications

Fang, Z.X.^1,2 ; Tang, B.^1,2 ; Zhang, S.R.^1,2

State Key Laboratory of Electronic Thin Films and Integrated Devices, China^1

National Engineering Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu

610054, China^2

关键词: Fine-grained microstructure;    Microwave dielectric characteristics;    Microwave dielectric properties;    Orthorhombic perovskite;    Solid-state routes;    Tolerance factor;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/170/1/012029/pdf
DOI  :  10.1088/1757-899X/170/1/012029

来源: IOP

【 摘 要 】

The compound Na1/2Sm1/2Ti1-x(Cr1/2Nb1/2)xO3 (x =0.00, 0.005, 0.01, 0.015, 0.02, 0.025) (NSTCNx) ceramics were prepared by the conventional solid-state route. The main phase of all NSTCNx ceramics were confirmed as an orthorhombic perovskite structure. The r and Q×f were improved because of improvement of densification and homogeneous fine grained microstructure with proper substitutions (x ≤0.01). The τ was able be tuned to a relatively low value of 154.3 ppm/°C because of a continuously decreasing tolerance factors. Typically, the NSTCNx (x =0.01) ceramic fired in air at 1450°C for 2h showed good microwave dielectric characteristics of r=104.3, Q×f=9179 GHz and τf =171.7 ppm/°C.