Dielectric properties of strontium iron holmium niobate ceramics

• Main Authors: Sanjoom K., Tunkasiri T., Pengpat K., Eitssayeam S., Rujijanagul G.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-84875736132&partnerID=40&md5=239c3689b36f98636e944ade685ef223; http://cmuir.cmu.ac.th/handle/6653943832/6905
• Institution: Chiang Mai University

Strontium iron holmium niobate (Sr(Fe1-xHox) 0.5Nb0.5O3) ceramics were synthesized via a solid-state reaction technique. The undoped ceramic showed an orthorhombic phase, but it transformed to a pseudocubic phase for higher Ho concentrations. A low solubility limit of Ho in SFN caused a formation of second phase for the x=0.15 ceramic. Dielectric behavior of undoped ceramic exhibited high dielectric constant over a wide temperature range. However, the doping shifted this region to a higher temperature. The doping also shifted the peak of dielectric loss to a higher temperature. Activation energy of dielectric relaxation increased with increasing Ho concentration. In addition, complex impedance analysis was applied to determine the behaviors of grain boundary and grain after doping. © 2012 Elsevier Ltd and Techna Group S.r.l.