| Autor: |
Jinjie, Zheng, Yaokang, Yang, Haitao, Wu, Zhou, Yuanyuan, Zhang, Zhiliang |
| Předmět: |
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| Zdroj: |
Journal of the American Ceramic Society; Aug2020, Vol. 103 Issue 8, p4333-4341, 9p, 1 Black and White Photograph, 1 Diagram, 3 Charts, 6 Graphs |
| Abstrakt: |
The microwave dielectric properties of Eu2TiO5 ceramic prepared by a conventional solid‐state method were investigated for the first time. An orthorhombic structure with Pnam space group was obtained from x‐ray diffraction. On the basis of P‐V‐L chemical bond theory and refined lattice parameters, the bond parameters of bond ionicity, lattice energy, bond energy, and coefficient of thermal expansion of Eu2TiO5 were computed. The relationship between chemical bond characteristics and microwave dielectric properties was discussed. Besides, far‐infrared reflective spectra indicated the absorption of structural phonon oscillation might be the main contribution to polarization for Eu2TiO5 ceramic. Eu2TiO5 ceramic sintered at 1300°C for 6 hours possessed excellent microwave dielectric properties of εr ~ 14.4 ± 0.2, Q × f ~ 21 000 ± 500 GHz, and τf ~ −10 ± 2 ppm/°C. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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