Crystal structure and microwave dielectric properties of (Ba1?αSrα)6?3xSm8+2xTi18O54 solid solutions |
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| Affiliation: | 1. Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan;2. LTCC Development Division, Soshin Electric Co., Ltd., Sarukubo, Saku-shi, Nagano 385-0011, Japan;1. Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Gabes University, Faculty of Sciences in Gabes, Gabes, Tunisia;2. Al Imam Mohammad Ibn Saud Islamic University (IMSIU), College of Sciences, Department of Physics, Riyadh 11623, Saudi Arabia;1. School of Materials Science and Engineering, Yunnan University, Kunming 650091, China;2. College of Engineering, Dali University, Dali 671003, China;3. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;1. INFLPR – National Institute for Laser, Plasma and Radiation Physics, Laser Department, Bvd. Atomistilor, Nr. 409, 077125 M?gurele (Ilfov), Bucharest, Romania;2. EaStCHEM Research School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST Fife, Scotland, United Kingdom;1. College of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, PR China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China;1. School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000, Shandong, China;2. College of Materials Science and Engineering, Nanjing Tech University, Nanjing Jiangsu, 211816, China |
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| Abstract: | The tungstenbronze-type-like (Ba1?αSrα)6?3xR8+2xTi18O54 (R = rare earth) solid solutions have been studied. Microwave dielectric properties of these solid solutions link to the substitution of large cations such as Ba ions by small Sr ions. In these solid solutions for x = 0, the quality factor (Q·f) exibits extremely low due to the inner strain resulting by the occupation of large Ba ions at relatively small A1-sites. However, dielectric constant (?r) of this composition show a high value. In this paper, improvement of quality factor (Q·f) by substituting small Sr ions for Ba ions in (Ba1?αSrα)6?3xSm8+2xTi18O54 solid solutions, where x = 0, is reported. In addition, the relationship between crystal structure and microwave dielectric properties is discussed from the viewpoint of structural formula and occupational state of large cations such as Ba, Sr and Sm in A1-sites. |
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