caa a22 4500 467927162 CHVBK 20180406152933.0 cr unu---uuuuu 170328e20060801xx s 000 0 eng 10.1134/S002016850608022X doi (NATIONALLICENCE)springer-10.1134/S002016850608022X Oxidation of SrFe12O19-based solid solutions with double heterovalent cation substitution [Elektronische Daten] [A. Knotko, A. Garshev, A. Meledin, V. Chelpanov, O. Syzgantseva, D. Zaitsev, V. Putlyaev] The effect of oxidizing annealing on the phase composition, microstructure, and magnetic properties of solid solutions based on Pb-containing strontium M hexaferrite is studied. The solid solutions prepared by different methods (ceramic route and glycol-citrate sol-gel process) are shown to differ in composition. Oxidizing annealing (air, 500-700°C) of single-phase materials leads to the formation of nanometer-sized (10-20 nm) equiaxed precipitates on some of the faces of the (initially smooth) hexaferrite grains. In some cases, such precipitates form chains running over the entire surface of the hexaferrite grain. Some of the annealed solid solutions contain a second phase, which has not been identified. Annealing slightly increases the coercive force of the solid solutions (by 2 to 25%, depending on their composition), which may be due to oxidation-induced second-phase precipitation or phase segregation of the solid solution within the hexaferrite grains. Pleiades Publishing, Inc., 2006 Knotko A. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut Garshev A. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut Meledin A. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut Chelpanov V. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut Syzgantseva O. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut Zaitsev D. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut Putlyaev V. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut Inorganic Materials Nauka/Interperiodica 42/8(2006-08-01), 918-923 0020-1685 42:8<918 2006 42 10789 https://doi.org/10.1134/S002016850608022X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S002016850608022X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Knotko A. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut NATIONALLICENCE 700 1- Garshev A. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut NATIONALLICENCE 700 1- Meledin A. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut NATIONALLICENCE 700 1- Chelpanov V. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut NATIONALLICENCE 700 1- Syzgantseva O. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut NATIONALLICENCE 700 1- Zaitsev D. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut NATIONALLICENCE 700 1- Putlyaev V. Moscow State University, Vorob'evy gory 1, 119992, Moscow, Russia aut NATIONALLICENCE 773 0- Inorganic Materials Nauka/Interperiodica 42/8(2006-08-01), 918-923 0020-1685 42:8<918 2006 42 10789 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer