Influence of W substitution on crystal structure, phase evolution and microwave dielectric properties of (Na0.5Bi0.5)MoO4 ceramics with low sintering temperature

Li-Xia Pang; Di Zhou; Ze-Ming Qi; Zhen-Xing Yue

doi:10.1038/s41598-017-03620-0

Influence of W substitution on crystal structure, phase evolution and microwave dielectric properties of (Na_0.5Bi_0.5)MoO₄ ceramics with low sintering temperature

Sci Rep. 2017 Jun 9;7(1):3201. doi: 10.1038/s41598-017-03620-0.

Authors

Li-Xia Pang¹, Di Zhou^{2

3}, Ze-Ming Qi⁴, Zhen-Xing Yue⁵

Affiliations

¹ Micro-optoelectronic Systems Laboratories, Xi'an Technological University, Xi'an, 710032, Shaanxi, China.
² Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China. zhoudi1220@gmail.com.
³ Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK. zhoudi1220@gmail.com.
⁴ National Synchrotron Radiation Laboratory, University of Science and Technology of China, Anhui, 230029, Hefei, China.
⁵ State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, PR China.

Abstract

In this work, the (Na_0.5Bi_0.5)(Mo_1-xW_x)O₄ (x = 0.0, 0.5 and 1.0) ceramics were prepared via solid state reaction method. All the samples can be well densified at sintering temperature about ~720 °C. Dense and homogeneous microstructure with grain size lying between 2~8 μm can be observed from scanning electron microscopy (SEM). Microwave dielectric permittivity of the (Na_0.5Bi_0.5)(Mo_0.5W_0.5)O₄ ceramic was found to be temperature-independent in a wide range between 25~120 °C with a temperature coefficient of frequency (TCF) ~-6 ppm/°C, a permittivity ~28.9, and Qf values 12,000~14,000 GHz. Crystal structure was refined using Rietveld method and lattice parameters are a = b = 5.281 (5) Å and c = 11.550 (6) Å with a space group I 4₁/a (88). The (Na_0.5Bi_0.5)(Mo_1-xW_x)O₄ ceramics might be good candidate for low temperature co-fired ceramics (LTCC) technology.

Publication types

Research Support, Non-U.S. Gov't