Effect of sintering regimes on the microstructure and magnetic properties of LiTiZn ferrite ceramics; Ceramics International; Vol. 45, iss. 2, pt. B

Effect of sintering regimes on the microstructure and magnetic properties of LiTiZn ferrite ceramics; Ceramics International; Vol. 45, iss. 2, pt. B

Detalhes bibliográficos
Parent link:Ceramics International.— , 1981-
Vol. 45, iss. 2, pt. B.— 2018.— [P. 2719-2724]
Autor Corporativo: Национальный исследовательский Томский политехнический университет (ТПУ) Институт неразрушающего контроля (ИНК) Проблемная научно-исследовательская лаборатория электроники, диэлектриков и полупроводников (ПНИЛ ЭДиП)
Outros Autores: Malyshev A. V. Andrei Vladimirovich, Petrova A. B. Anna Borisovna, Surzhikov A. P. Anatoly Petrovich, Sokolovsky A. N. Aleksey Nikolaevich
Resumo:Title screen
In present work, the influence of sintering regimes on the microstructure, saturation magnetization, density and porosity, the grain size, the Curie point, and the temperature dependence of the initial permeability of LiTiZn ferrite ceramics was investigated. Ceramics was prepared by a standard ceramic technique. The formation of a single-phase cubic spinel structure was confirmed by XRD analysis. The Curie point was determined from both the temperature dependences of the initial permeability and the method of thermogravimetric measurements in a magnetic field. Density/porosity and the grain size, the Curie point and magnetization are sensitive to the sintering regime. The initial permeability of ferrite decreases with sintering temperature (in the range of 1010–1150?°С) and grain size increasing that contradicts the generally accepted Globus and Smith-Wijn theories. A possible reason of such behavior is the formation of intragranular pores growing with the increase in the sintering temperature and inhibiting the domain wall motion inside the grain. These results correspond to the porosity of the investigated ferrite ceramic samples, which grows with sintering temperature increasing. The non-stoichiometry arising due to evaporation of lithium and zinc oxides at temperature above 1010?°C affects the initial permeability. In this work, a qualitative assessment of the defective state of ferrite samples obtained under various sintering regimes was given.
Режим доступа: по договору с организацией-держателем ресурса
Idioma:inglês
Publicado em: 2018
Assuntos:
электронный ресурс
труды учёных ТПУ
sintering
defects
magnetic properties
ferrites
спекание
дефекты
магнитные характеристики
ферриты
Acesso em linha:https://doi.org/10.1016/j.ceramint.2018.09.114
Formato: Recurso Eletrônico Capítulo de Livro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658898

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