Microwave dielectric properties and sintering behaviors of Zn 1.8 SiO 3.8 ceramics
- PDF / 1,265,631 Bytes
- 7 Pages / 595.276 x 790.866 pts Page_size
- 42 Downloads / 203 Views
Microwave dielectric properties and sintering behaviors of Zn1.8SiO3.8 ceramics Zheng Liang1,* , Xuening Han1, Gang Wang1, Yan Yang1, Liang Shi1, Wenxin Li1, Jie Li1, and Huaiwu Zhang1 1
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Received: 25 June 2020
ABSTRACT
Accepted: 4 November 2020
Zn2SiO4 ceramics are important candidates for microwave dielectric materials applied in wireless communication. However, the appearance of the second phase and stomatal impurity affect the microwave dielectric properties. In this work, Zn2SiO4 ceramics were prepared by the conventional solid-state process under different temperatures according to Zn-deficient formula to suppress the formation of secondary phase. X-ray diffraction showed peaks that coincide with those of Zn2SiO4 PDF card standard without secondary phase. Scanning electron microscopy revealed that there were uniform crystal grains at 1300 °C, and larger grains sizes yielded smaller pore gaps. The dielectric properties of Zn1.8SiO3.8 ceramics sintered at 1300 °C were estimated to er = 6.451, Q*f = 102,807 GHz, and sf = -32 ppm/°C.. In summary, Zn1.8SiO3.8 ceramics had potential applications in wireless communication technology due to their excellent dielectric property.
Ó
Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction With the rapid development of electronic information and high-frequency wireless communication technology (especially, 5G networks), electronic components require miniaturization, integration, and high performance. Hence, the improvement of microwave components based on dielectric materials coupled with new designs is highly desirable for meeting the specifications of current and future systems. For example, antenna substrate materials require low permittivity and high quality (high Q) [1–4]. To this end, silicate microwave dielectric ceramics are good
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10854-020-04835-0
candidates for such applications [5]. Besides, silicate possesses good microwave and environment friendly performance, thereby getting increasingly explored [6–12]. For instance, Zhou et al. prepared (Zn0.95Co0.05)2SiO4 ceramics with excellent microwave dielectric properties, but Q*f value was only 33,000 GHz and sf was - 59 ppm/°C [13]. Weng et al. assembled nano-sized TiO2-based Zn2SiO4 ceramics with enhanced dielectric properties in THz frequency range [14]. Nguyen et al. controlled the microstructure of ceramics by changing the ratio of Zn/Si [15]. The use of Zn-deficient formula yielded pure phase Zn2SiO4 with high Q*f, where Q*f
J Mater Sci: Mater Electron
increased from 40,000 GHz for Zn/Si ratio of 1:1 to more than 100,000 GHz for zinc-deficient formula. Therefore, Zn/Si ratio is an effective way to enhance the microwave properties of Zn2SiO4 ceramics. In the present work, Zn/Si ratio of 1.8:1 was employed to prevent the formation of secondary ph
Data Loading...
