Academic Journal
Crystal Structure, Infrared Reflection Spectrum, and Improved Microwave Dielectric Characteristics of Ba 4 Sm 28/3 Ti 18 O 54 Ceramics via One-Step Reaction Sintering
| العنوان: | Crystal Structure, Infrared Reflection Spectrum, and Improved Microwave Dielectric Characteristics of Ba 4 Sm 28/3 Ti 18 O 54 Ceramics via One-Step Reaction Sintering |
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| المؤلفون: | Zeping Li, Huajian Zhou, Gang Xiong, Huifeng Wang, Geng Wang |
| المصدر: | Materials, Vol 17, Iss 14, p 3477 (2024) |
| بيانات النشر: | MDPI AG |
| سنة النشر: | 2024 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | Ba 4 Sm 28/3 Ti 18 O 54 ceramics, microwave dielectric characteristics, reaction sintering, infrared reflection spectrum, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85 |
| الوصف: | High-k Ba 4 Sm 28/3 Ti 18 O 54 ceramics with improved microwave dielectric characteristics were successfully fabricated using the one-step reaction sintering (RS) route. The sintering characteristics, microstructure, crystal structure, infrared reflection spectrum, and microwave dielectric characteristics of Ba 4 Sm 28/3 Ti 18 O 54 ceramics prepared by the RS route were systematically investigated. Samples prepared by the RS route exhibited single-phase orthorhombic tungsten–bronze structure and dense microstructure at optimum sintering temperature. Compared with the conventional solid-state (CS) process, the Ba 4 Sm 28/3 Ti 18 O 54 ceramics fabricated by the RS route presented a smaller temperature coefficient (TCF), a higher quality factor ( Q × f ), and a higher permittivity ( ε r ). The improved microwave dielectric characteristics were highly dependent on the theoretical permittivity, atomic packing fraction, suppression of Ti 3+ , and Ti-site bond valence. Excellent combined microwave dielectric characteristics (TCF = −7.9 ppm/°C, Q × f = 9519 GHz, ε r = 80.26) were achieved for Ba 4 Sm 28/3 Ti 18 O 54 ceramics prepared by RS route sintered at 1400 °C, suggesting the RS route was a straightforward, economical and effective route to prepare high-performance Ba 4 Sm 28/3 Ti 18 O 54 ceramics with promising application potential. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1996-1944 |
| Relation: | https://www.mdpi.com/1996-1944/17/14/3477; https://doaj.org/toc/1996-1944; https://doaj.org/article/5e89fa80ce324ead92cd08872e408843 |
| DOI: | 10.3390/ma17143477 |
| الاتاحة: | https://doi.org/10.3390/ma17143477 https://doaj.org/article/5e89fa80ce324ead92cd08872e408843 |
| رقم الانضمام: | edsbas.A8BAF5E1 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 19961944 |
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| DOI: | 10.3390/ma17143477 |