Paper Title:
Microstructure and Microwave Dielectric Properties of Ba5(Nb1-xTax)4O15 (x = 0 ~ 0.5) Ceramics
  Abstract

The Ba5(Nb1-xTax)4O15 (x=0~0.5) solid-solution ceramics with hexagonal perovskite structure were prepared by solid-state oxide route. The phases and structure of the sintered ceramics were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The influences of composition and sintering temperature on the bulk density, microstructure and microwave dielectric properties were also investigated. As the value of x increased from 0 to 0.5, the Q×f value increases from 36,049 to 49,493 GHz (at ~9GHz), whereas the dielectric constant (εr) decreases from 39.21 to 33.03 and the temperature coefficient of resonant frequency (τf ) decreases from 78.6 to 19.4 ppm/oC. The results indicate that the microwave dielectric properties of Ba5(Nb1-xTax)4O15 ceramics can be easily modified in a large range by changing the relative content of Ta to Nb.

  Info
Periodical
Key Engineering Materials (Volumes 280-283)
Edited by
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Pages
9-12
DOI
10.4028/www.scientific.net/KEM.280-283.9
Citation
F. Zhao, Z. X. Yue, Y. C. Zhang, Z. L. Gui, L. T. Li, "Microstructure and Microwave Dielectric Properties of Ba5(Nb1-xTax)4O15 (x = 0 ~ 0.5) Ceramics", Key Engineering Materials, Vols. 280-283, pp. 9-12, 2005
Online since
February 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jing Pei, Zhen Xing Yue, Fei Zhao, Zhi Lun Gui, Long Tu Li
Abstract:The nano-sized Ba(Zr0.2Ti0.8)O3 powder was prepared by citrate sol-gel method. The crystal structure and the particle size of the powder...
76
Authors: Yun Xia Zhang, Jun Jie Hao, Jun Ting Qi
Building Materials
Abstract:In this paper, the effect of Nb2O5 on the microstructure and dielectric properties of BaTiO3-based ceramics...
1108
Authors: Chun Hong Mu, Ying Li Liu, Yuan Qiang Song, Huai Wu Zhang, Peng Liu
Abstract:CaCu3Ti4O12 presents colossal dielectric permittivity within a large temperature and frequency range, which...
321
Authors: Jia Mao Li, Tai Qiu
Chapter 3: Electrical, Magnetic and Optical Ceramics
Abstract:Microstructures and microwave dielectric properties of Ca(Sm0.5Nb0.5)O3 ceramics, prepared by a conventional...
1198
Authors: Yi Hang Fang, Kai Miao, Si Qiao Feng, Jia Meng Cao, Huan Ping Wang, Shi Qing Xu
Chapter 7: New Materials and its Applications
Abstract:The 0.95MgTiO3-0.05CaTiO3 (95MCT) powders and ceramics were prepared by a sol-gel method by using...
923