Structural transformation with milling on sol-gel precursor for BaM hexaferrite.

E. ESTEVEZ RAMS; RICARDO MARTÍNEZ GARCÍA; E. REGUERA RUIZ; H. MONTIEL SANCHEZ

JOURNAL OF PHYSICS - D (APPLIED PHYSICS)

IOP PUBLISHING LTD

Año: 2000 vol. 33 p. 2708 - 2715

0022-3727

Abstract. The structural modification upon milling in an intermediate step precursor of thesol?gel method for BaFe12O19 hexaferrite BaM production is discussed. The milling of theprecursor diminishes the powder particle size, leads to a more homogeneous matrix andinduces a solid-state transformation, from γ -Fe2O3 to α-Fe2O3. The induced modificationsof the precursors change the magnetic and structural properties of the final BaM hexaferritecompared to the BaM obtained from the non-milled precursor.