Title :
Effect of Co2O3-doped on dielectric properties of tungsten-bronze structure ceramic Ba4Eu2Fe2Nb8O3030
Author :
Peng, X.Y. ; Fang, L. ; Li, C.C. ; Hu, C.Z. ; Wu, B.L.
Author_Institution :
State Key Lab. of Adv. Technol. for Mater. Synthesis & Process., Wuhan Univ. of Technol., Wuhan, China
Abstract :
In present work, undoped and Co2O3-doped Ba4Eu2Fe2Nb8O30 ceramics were fabricated by routine solid state method. Wide temperature range measurement shows two kinds of dielectric peaks. The low-temperature peak attributes to ferroelectric-paraelectric phase transition. The high-temperature peak is affected greatly by Co2O3 additives. With increasing the content of Co2O3 dopant the second peak vanished, indicating that it is related to space charge.
Keywords :
barium compounds; ceramics; cobalt compounds; doping profiles; europium compounds; ferroelectric transitions; iron compounds; permittivity; sintering; space charge; Ba4Eu2Fe2Nb8O30; Ba4Eu2Fe2Nb8O30:Co2O3; dielectric constant; dielectric properties; doping; ferroelectric-paraelectric phase transition; sintering; solid state method; space charge; tungsten-bronze structure ceramic fabrication; Ceramics; Dielectric materials; Dielectric measurements; Educational technology; Ferroelectric materials; Laboratories; Niobium compounds; Permittivity; Temperature distribution; Temperature measurement; Tungsten bronze; dielectric properties; phase transition; x-ray diffraction;
Conference_Titel :
Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4970-5
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2009.5307599
