Oxygen-deficient tungsten bronze Sr4Sm2Ti4+2Nb6–2O30- as a temperature-stable dielectric
Source abstract
Abstract
Abstract Oxygen-deficient tungsten bronze ceramics with general formula Sr 4 Sm 2 Ti 4+2 x Nb 6–2 x O 30- x are synthesized by standard solid-state reaction. The sintering characteristics, crystal structure and dielectric properties have been investigated. Dense ceramics can be obtained by sintering at 1300 °C for all compositions. The x = 0.25 sample has the highest density > 97%. The sharp dielectric peaks and strong endothermic differential scanning calorimetry (DSC) peaks are observed for x = 0 and 0.1 compositions, which suggest the ferroelectric transition. For x = 0.25, the ferroelectricity is weakened, and the low temperature relaxation enhanced obviously. Therefore, the x = 0.25 composition indicates a high dielectric constant e ~ 200, loss tangent tan δ
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Inorganic Chemistry and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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