INVESTIGATION OF THE COMPOSITION AND ELECTROMAGNETIC PROPERTIES OF LITHIUM FERRITE LiFe5O8 CERAMICS SYNTHESIZED FROM ULTRADISPERSE IRON OXIDE

被引：3

作者：

Surzhikov, A. P. ^{[1
]}

Lysenko, E. N. ^{[1
]}

Malyshev, A. V. ^{[1
]}

Nikolaev, E. V. ^{[1
]}

Zhuravkov, S. P. ^{[1
]}

Vlasov, V. A. ^{[1
]}

机构：

[1] Natl Res Tomsk Polytech Univ, Tomsk, Russia

来源：

RUSSIAN PHYSICS JOURNAL | 2015年 / 57卷 / 10期

关键词：

lithium ferrite; LiFe5O8; ceramics; ultradisperse iron oxide; microwave properties; electromagnetic properties; PHASE-COMPOSITION; POWDERS;

D O I：

10.1007/s11182-015-0387-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Structural, magnetic, and electric characteristics of LiFe5O8 synthesized from ultradisperse iron oxide powder are investigated. The basic Fe2O3 reagent is prepared by oxidation of iron nanopowder with particle sizes of 100 nm synthesized by the electroexplosive method. It is demonstrated that LiFe5O8 is characterized by fine-grained ceramic structure with average grain size of 1.4 mu m, high values of the Curie temperature (similar to 630 degrees.), specific electrical resistance (10(7) Omega cm), and saturation magnetization (>3300 G). Thus, lithium ferrite so obtained without additives has the parameters suitable for its application as a microwave ferrite material. It is also demonstrated that addition of bismuth ferrite to the lithium ferrite composition during its sintering yields lower values of the specific electrical resistance and relatively high values of the density and saturation magnetization.

引用

页码：1342 / 1347

页数：6

共 19 条

[1] Low temperature preparation of β-LiFe5O8 fine particles by hydrothermal ball milling [J].