Structure and microwave dielectric properties of Ba1−Sr Mg2V2O8 ceramics
Source abstract
Abstract
Abstract The Ba 1− x Sr x Mg 2 V 2 O 8 (0≤ x ≤0.4) microwave dielectric ceramics were fabricated by a standard solid-state reaction method. The formation of a continuous solid solution within the whole composition range was identified. The ceramic samples could be well densified in the temperature range of 885–975 °C in air for 4 h. The permittivity e r was found to increase with increasing ionic polarizabilities. The Q × f values were believed to be closely related with packing fraction and grain refinement. The Sr 2+ substitution contributed to a monotonous increase of the A-site bond valence, such that the τ f value experienced a considerable variation from negative to positive values. The optimum microwave dielectric properties of an e r of 13.3, a high Qxf of 86,640 GHz (9.6 Hz) and a near-zero τ f of −6 ppm/°C could be yielded in the x =0.15 sample when sintered at 915 °C for 4 h.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microwave Dielectric Ceramics Synthesis · Ferroelectric and Piezoelectric Materials · Layered Double Hydroxides Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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