Improved microwave dielectric properties of anti-reduction Ba4(Ce0.5Sm0.5)9.3Ti18−zAlzO54 ceramics sintered in nitrogen atmosphere
| Autor: | Hua-Bo Wang, Hai Jiang, Jing Tao, Xiao-Hong Wang, Wen-Zhong Lu, Mao-Lin Mu |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Diffraction Materials science Microwave dielectric properties Analytical chemistry chemistry.chemical_element 02 engineering and technology Tungsten 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Atomic and Molecular Physics and Optics Spectral line Electronic Optical and Magnetic Materials chemistry X-ray photoelectron spectroscopy visual_art Phase (matter) 0103 physical sciences visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 29:1392-1398 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-017-8046-4 |
| Popis: | Ba4(Ce0.5Sm0.5)9.3Ti18−z Al z O54 (BCSTA, z = 0, 0.25, 0.50, 0.75, 1.00) ceramics sintered in nitrogen atmosphere were prepared by the conventional solid state reaction. The effects of Al3+ substitution for Ti4+ on microstructure and microwave dielectric properties in BCSTA ceramics have been investigated. X-ray diffraction spectra revealed only a single tungsten bronze in all the samples from z = 0 to z = 1.00 and backscatter electronic images confirmed a second BaAl2Ti5O14 phase at z > 0.50. Besides, XPS results indicated that the incorporation of Al3+ suppressed the reduction of Ti4+, which leaded to the microwave dielectric properties such as Q × f and τ f value improvement in BCSTA ceramics. Typically, the optimum combination of microwave dielectric properties: Q × f ∼ 8401.76 GHz, e r ∼ 71.68, and τ f ∼ +4.37 ppm/°C were obtained at z = 0.50 in BCSTA ceramics sintered in nitrogen atmosphere. |
| Databáze: | OpenAIRE |
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