caa a22 4500 463223373 CHVBK 20180405153219.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10853-007-1789-1 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1789-1 Effect of Nb2O5 additions on the power loss of NiZn ferrites [Elektronische Daten] [B. Rao, CheolGi Kim] Nickel-zinc ferrite system, Ni0.65Zn0.35Fe2O4+x Nb2O5 where x varies from 0.0wt% to 1.5wt% in steps of 0.3wt%, has been prepared by conventional ceramic technique. The samples were sintered at 1250°C for 4h in air atmosphere followed by natural cooling. The power loss and microstructures of these materials are examined. Microstructures reveal that niobium oxide additions promoted grain growth with an increase in grain size from 4μm to 13.2μm with the increase in niobium concentration. The measured power loss at frequencies from 100kHz to 10MHz under different exciting flux densities from 5mT to 30mT was found to be low up to 3MHz, thus making the materials suitable for power applications up to this frequency. In the total power loss, hysteresis loss is predominant below 500kHz and eddy current loss component is much higher at higher frequencies. Springer Science+Business Media, LLC, 2007 Rao B. Department of Physics, Andhra University, 530003, Visakhapatnam, India aut Kim CheolGi Research Center for Advanced Magnetic Materials, Chungnam National University, Daejeon, Korea aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/20(2007-10-01), 8433-8437 0022-2461 42:20<8433 2007 42 10853 https://doi.org/10.1007/s10853-007-1789-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1789-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rao B. Department of Physics, Andhra University, 530003, Visakhapatnam, India aut NATIONALLICENCE 700 1- Kim CheolGi Research Center for Advanced Magnetic Materials, Chungnam National University, Daejeon, Korea aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/20(2007-10-01), 8433-8437 0022-2461 42:20<8433 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer