Effect of sintering temperature on structural and magnetic properties of NiCuZn and MgCuZn ferrites

被引：68

作者：

Reddy, M. Penchal ^{[1
]}

Madhuri, W. ^{[2
]}

Ramana, M. Venkata ^{[1
]}

Reddy, N. Ramamanohar ^{[3
]}

Kumar, K. V. Siva ^{[1
]}

Murthy, V. R. K. ^{[4
]}

Kumar, K. Siva ^{[5
]}

Reddy, R. Ramakrishna ^{[1
]}

机构：

[1] Sri Krishnadevaraya Univ, Dept Phys, Ceram Composite Mat Lab, Anantapur 515055, Andhra Pradesh, India

[2] VIT Univ, Sch Sci, Vellore 632014, Tamil Nadu, India

[3] Yogi Vemana Univ, Dept Mat Sci & Nanotechnol, Kadapa 516003, India

[4] Indian Inst Technol, Microwave Lab, Madras 600036, Tamil Nadu, India

[5] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2010年 / 322卷 / 19期

关键词：

Ferrites; Microwave heating; Initial permeability; Saturation magnetization; EFFECTIVE ANISOTROPY; HIGH-PERMEABILITY; MICROWAVE; MICROSTRUCTURE; GROWTH;

D O I：

10.1016/j.jmmm.2010.04.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low temperature microwave sintered NiCuZn and MgCuZn ferrites with compositions Ni0.35Cu0.05Zn0.60Fe2O4 and Mg0.35Cu0.05Zn0.60Fe2O4 were synthesized by conventional mixed oxide method. NiCuZn and MgCuZn ferrite samples obtained showed better sintered densities at 950 and 900 degrees C, respectively. The scanning electron micrographs of both the ferrite samples appear to be very much similar. The magnitude of initial permeability of MgCuZn ferrite samples is found to be obviously higher than those of NiCuZn ferrite samples at all sintering temperatures. This is mainly due to the fact that MgCuZn ferrite has smaller magnetocrystalline anisotropy constant and magnetostrictive constant. NiCuZn ferrites have higher saturation magnetization than MgCuZn ferrites, which is due to the higher magnetic moment of NiCuZn ferrites. Our results indicate that the microwave sintering method seems to be a potential technique in the MLCI technology. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2819 / 2823

页数：5

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