Highly enhanced Q × f value of Ca0.61Nd0.26TiO3 ceramics with SnO2 additive

3rd International Conference on New Material and Chemical Industry

材料科学;化学工业

Xiong, Z.^1^2 ; Tang, B.^1^2 ; Yang, C.T.^1^2 ; Zhang, S.R.^1^2

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

611731, China^1

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

611731, China^2

关键词: Dielectric characteristics;    F values;    Field emission scanning electron microscopes;    Grain size;    Microwave dielectric properties;    Orthorhombic perovskite;    Second phase;    X ray diffractometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/479/1/012079/pdf
DOI  :  10.1088/1757-899X/479/1/012079

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The microstructure and microwave dielectric properties of Ca0.61Nd0.26TiO3 + x mol SnO2 (0 ≤ x ≤ 0.05) ceramics (CNTSx) were investigated by Field Emission Scanning Electron Microscope, Hakki-Coleman dielectric resonator, network analyser and X-ray Diffractometer. The XRD results indicated that all CNTSx samples were formed as orthorhombic-perovskite-structured CaTiO3 phase. There were second phase Ti0.7Sn0.3O2 in range of 0.02 ≤ x ≤ 0.05. The SnO2 additive promoted the grain size of CNT ceramic, which was conducive to the promotion of Q × f value. Although the r value declined as contents of SnO2 increased, the SnO2 additive had a little of amelioration for τf value. Finally, the CNTS0.01 ceramic sintered at 1400 °C had stable comprehensive dielectric characteristic: r ∼ 105.2, Q × f ∼ 14,369 GHz, τf ∼ +262.3 ppm/°C.