How synthesis parameters influence the quality of lead magnesioniobate PbMg1/3Nb2/3O3 |
| |
Authors: | G V Zimina E S Nassonov I N Smirnova F M Spiridonov |
| |
Institution: | 1. Moscow State University of Fine Chemical Technologies, pr. Vernadskogo 86, Moscow, 119571, Russia 2. Moscow State University, Moscow, 119991, Russia
|
| |
Abstract: | Lead magnesioniobate PbMg1/3Nb2/3O3 (PMN) has been prepared using lead oxide and magnesium niobate. Factors that influence the perovskite/pyrochlore ratio in the PMN structure have been studied. In order for the maximal amount of the perovskite phase to be obtained, synthesis should be carried out at 850?C900°C; an excess of MgO (1?C5 wt %) does not exert a positive effect. An excess of PbO (5?C7 wt %) allows one to obtain a phase that contains 85% PMN, with the perovskite structure. The perovskite lattice is found to be stabilized as a result of cationic substitutions (Yb, Lu) in the Mg-Nb sublattice due to the formation of solid solution Pb(Mg1/3Nb2/3)1 ? x Yb(Lu) x O3, where 0 ?? x ?? 0.9. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|