Synthesis of glass ceramics containing finely dispersed particles of aluminum-doped M-type strontium hexaferriteстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Glasses with nominal compositions SrFe10Al2O19+4(SrB2O4+Sr2B2O5) (1) and SrFe9Al3O19+4(SrB2O4+Sr2B2O5) (2) were prepared by rapid quenching of melts. Thermal treatment of glass samples at 600-900 degrees C resulted in crystallization of the magnetic phase SrFe12-xAlxO19 (x = 1.1 +/- 0.1) and strontium borates. Platelet hexaferrite particles with average sizes from (250x60) nm(2) to (450x 140) nm(2) were prepared. The coercive force of glass ceramics is 580 and 475 kA m(-1) for glasses 1 and 2, respectively. The coercive force of 580 kA m(-1) is the highest known value compared to hexaferrite particles prepared earlier by glass crystallization.