Abstract
Effects of multi-doping of rare-earth oxides (R = Yb, Sm, Ho, La and Nd) on the microstructure development and electric properties of BaTiO 3 ceramics were studied. The addition of samarium oxide leads to poor densification and small grains, whereas ytterbium oxide develops large grains and secondary phases along the grain boundary, and Ho ion with an intermediate ionic radius gives rise to higher densities with fine grains. The grain size of Yb-doped BaTiO 3 decreased with increasing Sm contents. The system coated with 2.0 at.% Sm and 2.0 at.% Yb exhibited dense microstructures with uniform small grains, and Yb-rich second phases were not observed. It was confirmed that an appropriate ratio of donor to acceptor is necessary to the optimum microstructure. Curie temperature of rare-earth doped BaTiO 3 was strongly dependent on the unit-cell volume associated with the ionic sizes of rare-earth ions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
