The Influence of Mechanochemical Activation and Thermal Treatment on Magnetic Properties of the BaTiO sub( 3)-Fe sub( x)O sub( y) Powder Mixture

• Published in: Science of sintering Vol. 47; no. 1; p. 3
• Main Authors: Ristanovic, Z, Kalezic-Glisovic, A, Mitrovic, N, [ETH]ukic, S, Kosanovic, D, Maricic, A
• Format: Journal Article
• Language: English
• Published: 01.01.2015
• Subjects: Activation; Annealing; Barium titanates; Iron; Iron oxides; Magnetic properties; Magnetization; X-ray diffraction
• ISSN: 0350-820X; 1820-7413

Powder mixture of 50 mass% of barium titanate (BaTiO sub( 3)) and 50 mass% of iron (Fe) was prepared by solid-state reaction technique, i.e. ball milled in air for 60 min, 80 min, 100 min, 120 min and 150 min. During mechanochemical activation it was observed the iron powder transitsion to iron oxides. Depending on the activation time the content of iron oxides FeO, Fe sub( 2)O sub( 3) and Fe sub( 3)O sub( 4) varies. Simultaneously, with the content change of the activated system, magnetic properties change as well. The XRD analysis of milled samples shown that as the activation time increase, the iron oxide percentage increases to, whereby the percentage of BaTiO sub( 3) in a total sample mass decreases. The percentage of iron oxides and BaTiO sub( 3) in annealed samples changes depending on annealing temperature. The thermomagnetic measurements performed by Faraday method shown that the powder mixture milled for 100 minutes exhibit maximum magnetization prior to annealing.