The effect of B2O3 addition to the microstructure and magnetic properties of Ni0.4Zn0.6Fe2O4 ferrite

被引：24

作者：

Yuksel, Berat ^{[1
]}

Kirtay, Sebahattin ^{[1
]}

Ozkan, T. Osman ^{[1
,2
]}

Acikalin, Engin ^{[2
]}

Erkalfa, Hilkat ^{[2
]}

机构：

[1] Istanbul Univ, Fac Engn, Dept Mat & Met Engn, TR-34320 Istanbul, Turkey

[2] TUBITAK, Marmara Res Ctr, Gebze, Kocaeli, Turkey

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2008年 / 320卷 / 05期

关键词：

ferrite; ferrimagnetic; magnetic material; magnetic hysteresis;

D O I：

10.1016/j.jmmm.2007.08.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of 0.01 and 0.1 mol B2O3 addition to the microstructure and magnetic properties of a Ni-Zn ferrite composition expressed by a molecular formula of Ni0.4Zn0.6Fe2O4 were investigated. The toroid-shaped samples prepared by pressing the milled raw materials used in the preparation of the composition were sintered in the range of 1000-1300 degrees C. The addition of 0.01 mol B2O3 increased the grain growth and densification giving rise to reduced intergranular and intragranular porosity due to liquid-phase sintering. The sintered toroid sample at 1300 degrees C gave the optimum magnetic properties of B-r = 170 mT, H-c = 0.025 kA/m and a high initial permeability value of mu(i) = 4000. The increment of the B2O3 content to 0.1 mol resulted in a pronounced grain growth and also gave rise to large porosity due to the evaporation of B2O3 at higher sintering temperatures. Hence, it resulted in an air-gap effect in the hysteresis curves of these samples. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：714 / 718

页数：5

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