Intrinsic factors affecting the microwave dielectric properties of Mg2Ti1−(Mg1/3Sb2/3) O4 ceramics
Source abstract
Abstract
Abstract The effect of crystal structure on the microwave dielectric properties of Mg 2 Ti 1− x (Mg 1/3 Sb 2/3 ) x O 4 (0.025≤ x ≤0.15) ceramics was investigated. A single phase having a cubic inverse spinel structure formed over the entire range of compositions, in specimens sintered at 1450 °C for 4 h. The structural characteristics of these ceramics were quantitatively evaluated by applying the Rietveld refinement method to the X-ray diffraction data. The largest bond strength between the cation and the oxygen ion and hence the highest quality factor ( Qf ) of the specimens were obtained at x =0.05. Although the ionic polarizability (3.29 A 3 ) of (Mg 1/3 Sb 2/3 ) 4+ was larger than that (2.93 A 3 ) of Ti 4+ , the dielectric constant ( K ) of the specimens decreased owing to the decrease of rattling effect with increasing x . In addition, the temperature coefficient of resonant frequency ( TCF ) decreased with decreasing K values. Typically, a high Qf value of 229,000 GHz was obtained for the specimens with x =0.05.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microwave Dielectric Ceramics Synthesis · Ferroelectric and Piezoelectric Materials · Electromagnetic wave absorption materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
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