Preparation of SrFe12O19·6SrB2O4 magnetic composites by spray pyrolysisстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Spray pyrolysis has been used to produce X-ray amorphous precursors with the nominal composition SrFe12O19 center dot 6SrB(2)O(4) in the form of spherical particles 0.3 to 2 mu m in diameter. Heat treatment of the precursors at temperatures from 650 to 900A degrees C has produced platelike strontium hexaferrite particles embedded in a SrB2O4 matrix. With increasing annealing temperature, the average dimensions of the hexaferrite particles increase from 80 x 20 to 450 x 100 nm and the coercivity of the material rises from 240 to 440 kA/m.