Improved dielectric resonator through Nd substitution in SrLa 4 Ti 4 O 15 ceramics at microwave frequencies
| Autor: | Cheng-Hsing Hsu, Wen-Shiush Chen, Cheng-Chi Yu, Ja-Hao Chen, Yu-Cheng Wang, Jen-Chieh Liu |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Process Chemistry and Technology Analytical chemistry Sintering chemistry.chemical_element Substitution (algebra) 02 engineering and technology Dielectric resonator Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Neodymium 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic 0210 nano-technology Microwave Solid solution |
| Zdroj: | Ceramics International. 43:S296-S300 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2017.05.191 |
| Popis: | The effects of neodymium substitution on the sintering temperature and microwave dielectric properties of SrLa 4 Ti 4 O 15 were investigated. A single-phase solid solution with a hexagonal structure was formed in Sr(La 1−x Nd x ) 4 Ti 4 O 15 (x = 0.01–0.1) ceramics. By increasing x from 0.01 to 0.07, the dielectric constant and Q×f value of the sample increased at a sintering temperature of 1590 °C and thereafter decreased. In addition, the increase in the dielectric constant and Q×f value with increasing sintering temperature was in agreement with the increase in density in the composition range of 0.01–0.1. The zero temperature coefficient of resonant frequency of the Sr(La 1−x Nd x ) 4 Ti 4 O 15 (x = 0.01–0.1) ceramics also improved with increasing Nd content. Nd substitution resulted in excellent microwave dielectric properties, obtaining e r = 47.5, Q×f = 49,900 GHz, and τ f = 0.54 ppm/°C for the x = 0.07 composition. |
| Databáze: | OpenAIRE |
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