B2O3 Katkılı M-Tipi Baryum Hekzaferrit Kompozit Kalıcı Mıknatısın Üretimi ve Karakterizasyonu

Kompozit (BaFe12O19)1-x(B2O3)x (0 ≤ x ≤ 0.1) hekzaferrit örnekleri toz metalurjisi yöntemi ile üretilmiştir. Malzemelerin yapısal ve manyetik özellikleri X – Işını Difraksiyonu (XRD) ve Titreşimli Örnek Manyetometresi (VSM) ile belirlenmiştir. XRD analizi sonuçlarına saf M-Tipi BaFe12O19 ferrit fazı sadece katkısız örneklerde elde edilmiş, B2O3 ilavesi ile birlikte BaFe12O19 fazının yanı sıra hematit (α-F2O3) ikinci bir faz olarak tespit edilmiştir. Kompozit ferrit malzemelerinin doyum manyetizasyonu (Ms) ve kalıcı manyetizasyon (Mr) B2O3 katkısındaki artış ile birlikte azalmıştır. Zorlayıcı alan (Hc) en yüksek değere x = 0.05 olduğunda ulaşmış, katkı miktarı daha da arttığında ana fazın hematit (α-F2O3) olması ve malzeme içerisinde kalıcı manyetik ferrit miktarının azalması nedeniyle Hc düşmüştür. Üretilen B2O3 katkılı baryum hekzaferrit kompozit malzemelerinden en iyi kalıcı manyetik özellikler x = 0.05 olduğunda elde edilmiştir.

Anahtar Kelimeler:

Manyetik özellik, baryum hekzaferrit, histerezis eğrisi, kalıcı mıknatıs

Production and Characterization of B2O3 Added M-Type Barium Hexaferrite Composite Magnet

The composite (BaFe12O19)1-x(B2O3)x (0 ≤ x ≤ 0.1) hexaferrite samples were produced by powder metallurgy method. Structural and magnetic properties of the materials were determined by using X – Ray Diffraction (XRD) ve Vibrating Sample Magnetometer (VSM). According to the results of XRD analysis pure BaFe12O19 ferrite phase was obtained for only undoped sample, with the addition of B2O3, hematite ((α- F2O3) was detected as a second phase. Saturation magnetization (Ms) and remanent magnetization (Mr) decreased with the increase in B2O3 addition. Coercivity (Hc) reached to a maximum value at x = 0.05, with the further increase in the amount of the addititive, Hc decreased due to that hematite (α-F2O3) was matrix phase and the amount of hard magnetic ferrite decreased in the material. In the produced B2O3 added composite barium hegzaferrite materials the best hard magnetic properties were obtained at x = 0.05.

Keywords:

Magnetic properties, barium hexaferrite, hysteresis curve, permanent magnet,

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