| Autor: |
Li, Chen, Hou, Jiale, Ye, Zijun, Muhammad, Raz, Li, Aihua, Ma, Mingtao, Wu, Guofa, Song, Kaixin, Zhou, Tao, Mao, Minmin, Liu, Bing, Bafrooei, Hadi Barzegar, Taheri-nassaj, Ehsan, Luo, Shaojin, Shi, Feng, Sun, Shikuan, Wang, Dawei |
| Předmět: |
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| Zdroj: |
Journal of Materials Science: Materials in Electronics; Feb2022, Vol. 33 Issue 4, p2116-2124, 9p |
| Abstrakt: |
In this study, MgxY3-xAl5-xSixO12 (x = 0–0.6) ceramics were prepared via a high-temperature solid state method. Mg2+ and Si4+ replacing Y3+ ions at A-site and Al3+ at C-site in garnet-type Y3Al5O12 (YAG) ceramics were designed to discuss the effects of crystal structure, microstructure on microwave dielectric properties for the first time. Liquid phase sintering induced by doping of Mg2+-Si4+, significantly decreased the sintering temperature and time for the densification of YAG ceramics. X-ray diffraction of the samples showed single phase for x ≤ 0.5, while a secondary phase of MgAl2O4 formed for x = 0.6. From the Rietveld analysis, a decrease in lattice dimensions, bond length and valence and rattling effect were observed, while Raman results showed a change in FWHM of the Eg mode. Based on these parameters, a structure–property relation was developed for MgxY3-xAl5-xSixO12 ceramics. Specially, Mg0.1Y2.9Al4.9Si0.1O12 showed a good set of microwave dielectric properties sintered at 1575 °C for 4 h with εr = 10.67, Q × f = 58,799 GHz, τf = -29.5 ppm/°C. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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