We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Dielectric tunable properties of BaSrTiO-MgMoO composite ceramics for microwave applications.
- Authors
Tang, Linjiang; Wang, Jinwen; Zhai, Jiwei; Shen, Bo; Yao, Xi
- Abstract
(1− x) BaSrTiO- xMgMoO ( x = 0, 5, 10, 20 and 30 wt%) composite ceramics were prepared via solid state reaction processing. Their structure and dielectric properties were systematically characterized. The introduction of MgMoO resulted in a change in lattice constant of the perovskite phase and partial reaction between MgMoO and BaSrTiO occurred in the sintering process. Both X-Ray Diffraction (XRD) and Back-scattered Electron Images (BEI) analysis show the co-existence of three phase structures of BST, MgMoO and BaMoO. With increasing of MgMoO content, the tunability of the composite ceramics was decreased due to the increase of the amount of non-ferroelectric phases. The Curie temperature Tc of the samples gradually shifted to low temperatures with increasing of MgMoO content. Dielectric constant can be adjusted in the range from 2035 to 150, meanwhile maintain a relatively high tunability and Q values. The sample with 20 wt% MgMoO possesses a tunability of 10 %, a low dielectric constant of 111 and an appropriate Q value of 183 (2.240 GHz), which meet the requirements of high power and impedance matching, thus making it a promising candidate for applications as electrically tunable microwave devices.
- Subjects
DIELECTRICS; BARIUM compounds; FIBER-reinforced ceramics; MICROWAVES; CHEMICAL reactions; COMPOSITE structures
- Publication
Journal of Materials Science: Materials in Electronics, 2013, Vol 24, Issue 7, p2576
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-013-1136-z