Method for preparing superfine spherical iron nitride powder

一种超细球形氮化铁粉末的制备方法

Abstract

The invention provides a method for preparing superfine spherical iron nitride powder, and belongs to the technical field of powder preparation. In the method, the superfine spherical iron nitride powder is synthesized and prepared by taking carbonyl iron liquid as a raw material, ammonia (or nitrogen) plasma as nitridation atmosphere and radio frequency (RF) plasma as a heat source for the reaction. The method comprises the following steps of: evaporating the carbonyl iron liquid; feeding the liquid steam into the nitrogen plasma by carrier gas; and reacting decomposed carbonyl iron steam with the nitrogen plasma to obtain the superfine spherical iron nitride powder. The method is characterized in that the nitridation and spheroidization of the carbonyl iron liquid steam are finished in one step by taking the radio frequency (RF) plasma as the heat source so as to prepare the superfine spherical iron nitride powder. The superfine spherical iron nitride powder produced by the method has fine and uniform particle size, high sphericity and high spheroidization rate; the process is simple; and magnetic fluid prepared by the method has high saturation magnetization.
本发明提供一种超细球形氮化铁粉末的制备方法,属于粉末制备技术领域。本发明所述的方法以羰基铁液体为原料,氨气(或氮气)等离子体为氮化反应气氛、射频(RF)等离子体为反应的热源,合成制备超细球形氮化铁粉末。其工艺步骤是首先将羰基铁液体蒸发,载气将液体蒸气送入氮等离子体中,羰基铁蒸气分解后与氮等离子体反应,生成超细球形氮化铁粉末。其特征在于:以射频(RF)等离子体为热源,使羰基铁液体蒸气的氮化与球化处理一步完成,制备出超细球形氮化铁粉末。此方法生成的球形氮化铁粉末粒度细小均匀、球形度好、球化率高,且工艺简单,用其制备的磁流体具有较高的饱和磁化强度。

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NO-Patent Citations (1)

    Title
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