Crystal structure, Raman spectra and microwave dielectric properties of Li2Mg3Ti1-x(Mg1/3Nb2/3)xO6 (0 ≤x ≤ 0.25) ceramics
Source abstract
Abstract
Abstract Li 2 Mg 3 Ti 1-X (Mg 1/3 Nb 2/3 ) X O 6 (0 ≤x ≤ 0.25) ceramics were prepared by a conventional solid-state reaction process. Their crystal structures, sintering characteristics, Raman spectra and microwave dielectric properties were then investigated. XRD patterns of the sintered samples indicated that all compositions showed a single phase and the rock-salt structure. As the (Mg 1/3 Nb 2/3 ) 4+ contents increase, the variations of e r values showed a downward trend, which could be explained by the changes of polarizabilities and the shift of Raman vibration modes. Q·f values initially increased to a maximum value and then decreased with increasing of x values. In addition, τ f values decreased almost linearly with the x values, which significantly correlated with the thermal expansion coefficient. Excellent combined microwave dielectric properties with e r = 14.79, Q·f = 204,900 GHz and τ f = −18.43 ppm/°C were obtained for Li 2 Mg 3 Ti .95 (Mg 1/3 Nb 2/3 ) .05 O 6 ceramic sintered at 1550 °C.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microwave Dielectric Ceramics Synthesis · Ferroelectric and Piezoelectric Materials · Dielectric properties of ceramics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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