Synthesis of plate-like spinel particles and spinel-hexaferrite intergrowth nanocomposite particles using the hydrothermal decomposition of Ba-hexaferrite

被引：8

作者：

Makovec, Darko ^{[1
]}

Drofenik, Miha ^{[1
,2
]}

机构：

[1] Jozef Stefan Inst, Dept Mat Synth, Ljubljana 1000, Slovenia

[2] Univ Maribor, Fac Chem & Chem Engn, SLO-2000 Maribor, Slovenia

来源：

CRYSTAL GROWTH & DESIGN | 2008年 / 8卷 / 07期

关键词：

D O I：

10.1021/cg800166h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new strategy for the synthesis of particles of cubic magnetite spinel with an anisotropic plate-like shape and of spinel-hexaferrite intergrowth nanocomposite particles is presented. The strategy is based on the hydrothermal decomposition of presynthesized Ba-hexaferrite (BaFe12O19) particles in the presence of NaHCO3 and a hydrazine reducing agent. The Ba from the BaFe12O19 preferentially reacts with CO32- to form witherite (BaCO3), resulting in the decomposition of the original hexaferrite particles into magnetite (Fe3O4) platelets, or into spinel-hexaferrite intergrowth particles, when the reaction is incomplete. The intergrowth particles displayed hysteresis loops combining the soft magnetic properties of the spinel and the hard magnetic properties of the hexaferrite.

引用

页码：2182 / 2186

页数：5

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