添加Zn对自反应淬熄法制备Mn-铁氧体空心微珠相结构与性能的影响

Effect of Zn Addition on Phase Structure and Properties of Mn-Ferrite Hollow Microspheres Prepared by a Self-Reactive Quenching Method

采用自反应淬熄法制备了Mn-铁氧体复合空心微珠,分析了自蔓延反应体系中添加Zn元素对制备空心微珠的形貌、相结构和电磁参数的影响。结果表明,制备的粉末大部分为球状空心微珠,粒径在微米范围,少量自蔓延反应不完全的团聚颗粒未能球化,形成不规则颗粒。Zn的引入使得微珠成分转变为以Mn0.5Zn0.5Fe2O4铁氧体为主,提高了Mn-铁氧体复合空心微珠的微波电磁损耗,使吸收峰向高频移动。

Mn-ferrite composite hollow microspheres were prepared by a self-reactive quenching method. The effect of Zn adding on morphology, phase structure and electromagnetic parameters of the hollow microspheres were analyzed. The results show that most of the prepared powders are spherical hollow microspheres, and the particle size is in the micron range. A small amount of agglomerated particles fail to spheroidize but form irregular particles because the self-propagating reaction is not complete. The Mn0.5Zn0.5Fe2O4 ferrite composite hollow microspheres are obtained by adding metal Zn powders, and the properties of microwave electromagnetic loss are improved. The microwave absorption peaks move to higher frequency.