Publication Date:
2016-12-31
Description:
Unfilled tungsten bronze ceramic Ba 3.5 Sm 1.5 Fe 0.75 Nb 9.25 O 30 was prepared by a conventional solid-state reaction method. Its structure, microstructure, and dielectric properties were investigated. Dielectric behaviors indicate that the ceramics are ferroelectric at room temperature with a remnant polarization ~1.61 μC/cm 2 and a coercive field ~13.91 kV/cm. Ba 3.5 Sm 1.5 Fe 0.75 Nb 9.25 O 30 ceramics have temperature stability with a high dielectric constant (ε r ) varying from 172 to 202 at the temperature range −55 to 200°C (at 1 MHz). Capacitance change rate of the sample is less than 15%. These results indicate that Ba 3.5 Sm 1.5 Fe 0.75 Nb 9.25 O 30 ceramics might be promising in temperature-stable multi-layer ceramic capacitors.
Print ISSN:
1546-542X
Electronic ISSN:
1744-7402
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
