Journal
JOURNAL OF ELECTROCERAMICS
Volume 31, Issue 3-4, Pages 331-337Publisher
SPRINGER
DOI: 10.1007/s10832-013-9847-3
Keywords
Ceramics; Sintering; SEM; Dielectric properties
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Polycrystalline Ba(FeNb)(0.5)O-3/BFN ceramics were sintered conventionally and in a microwave (MW) furnace, respectively. Conventional and microwave sintering temperatures were same with different soaking times. Microwave sintering of BFN ceramics showed enhanced grain growth with improved dielectric properties. Highest dielectric constant (similar to 29,913 at 1 kHz) at room temperature (RT) was observed in BFN ceramics sintered in MW furnace for 30 min. At RT, a non-Debye type of dielectric relaxation was observed in both conventionally and MW sintered BFN ceramics. The observed giant dielectric constant of conventionally and MW sintered BFN ceramics was attributed to intrinsic (space charge polarization) and extrinsic (Maxwell-Wagner type polarization) effects, respectively.
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