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Microstructure and magnetic and electrical properties of low-temperature sintering Ni-Zn, Li-Zn and Mg-Zn-Cu ferrites without and with addition of lead oxide

L. SACHELARIE1, C. DOROFTEI2,* , E. REZLESCU2

Affiliation

  1. Petre Andrei University from Iasi, 13 Ghica Voda, Iasi 700400, Romania
  2. National Institute of Research and Development for Technical Physics, 47 D. Mangeron Bulevard, Iasi700050, Romania

Abstract

The impact of PbO addition on the densification, microstructure and magnetic and electrical properties of NiZn, LiZn and MgCuZn ferrites prepared by ceramic method has been studied. Sintering experiments were carried out with small amounts of PbO, between 0 and 1.5 wt%. Due to low melting point, PbO favors sinterability of ferrites at lower temperatures. A sintered density of about 5 g/cm3 was achieved with 1.2 wt% PbO addition by sintering at 1100o C, that is impossible without PbO. The densification behavior and physical properties of PbO-doped ferrites are closely related to microstructural changes caused by PbO. It was evidenced significant growth of grain size without compromising desirable material properties except for electrical resistivity..

Keywords

Ferrites, Microstructure, Resistivity, Permeability, Saturation magnetization.

Submitted at: April 7, 2010
Accepted at: April 26, 2010

Citation

L. SACHELARIE, C. DOROFTEI, E. REZLESCU, Microstructure and magnetic and electrical properties of low-temperature sintering Ni-Zn, Li-Zn and Mg-Zn-Cu ferrites without and with addition of lead oxide, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 4, pp. 864-867 (2010)