@article{Zhang2022, 
author = {Pengcheng Zhang and Hao Li and Xiaoqing Chen and Xing Zhang and Hongcheng Yang and Canbing Li and Shuren Zhang},
title = {Influence of Re-ions with different ionic radius in Ba12ReNb9O36 on crystal structure and microwave dielectric properties},
year = {2022},
journal = {Journal of Materiomics},
volume = {8},
number = {1},
pages = {104-112},
keywords = {Microwave dielectric ceramic, Ba12ReNb9O36, Polarizability, Raman spectrum},
url = {https://www.sciopen.com/article/10.1016/j.jmat.2021.05.001},
doi = {10.1016/j.jmat.2021.05.001},
abstract = {The Ba12ReNb9O36 (ReYb, Ce, Tm, Er, Y, Ho, Dy, Gd) ceramics are synthesized by solid-phase reaction method. The phase composition, crystal structure, microstructure, and microwave dielectric properties of the ceramics are investigated by X-ray diffraction, X-ray photoelectron spectroscopy, Scanning electron microscopy and Raman spectrum. The optimal microwave dielectric properties (εr = 37.23, Q × f = 36600 GHz, and τf = 34 ppm/℃) are obtained for Ba12YbNb9O36 ceramic sintered at 1420 ℃ for 6 h. In this system, the variation of dielectric constant is dominated by polarizability. The Q × f is mainly affected by internal strain/fluctuation of d-spacing. The variation of τf is related to the temperature coefficient of dielectric constant and the oxygen octahedron distortion. Furthermore, the reduction of Ce4+ ions, the relative density, linear thermal expansion coefficient, and the second phase are also important factors affecting microwave dielectric properties.}
}