Influence of the presence of Co on the rare earth solubility in M-type hexaferrite powders |
| |
| Authors: | L. Lechevallier J.M. Le Breton A. Morel P. Tenaud |
| |
| Affiliation: | 1. Groupe de Physique des Matériaux, UMR CNRS 6634, Université de Rouen, 76801 St Etienne du Rouvray, France;2. UGIMAG, 38830 St Pierre d’Allevard, France |
| |
| Abstract: | Sr1−xRExFe12O19 and Sr1−xRExFe12−xCoxO19 (x=0–0.4 and RE=Pr, Nd) M-type hexaferrite powders were produced according to a conventional ceramic process. The X-ray diffraction analysis of the calcinated material reveals the presence of secondary α-Fe2O3, PrFeO3 or NdFeO3 and CoFe2O4 phases in substituted samples, with proportions that increase with x. However, for the same x value, the proportion of secondary phases is lower in Co-containing powders than in Co-free powders. This indicates that the presence of Co in the M-type phase increases the solubility of the rare earth. The results of the Mössbauer investigation indicate that the solubility of Pr is higher than that of Nd in Co-containing samples. |
| |
| Keywords: | 75.30.&minus m 75.50.Ww 76.80.+y |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
