采用化学法制备高纯钌粉，研究了沉淀条件对制备的钌粉粒度和形貌的影响，对钌粉的纯度进行了分析。结果表明，氯气氧化作用对钌粉的粒度和形貌影响较大，在沉淀过程进行搅拌能有效细化氯钌酸铵晶粒。采用氯化铵饱和溶液沉淀，沉淀过程进行搅拌，并通入氯气进行氧化，得到(NH4)2RuCl6晶体，烘干后在800℃煅烧6 h，得到的钌氧化物在750℃条件下通氢还原30 min，得到的钌粉粒度约5~20μm，呈近球形的多边形，辉光放电质谱法(GDMS)分析表明钌粉纯度达到99.95%以上。
The effects of the precipitation conditions on the size and morphology of ruthenium powders prepared by chemical method were studied, and the purity of ruthenium powder was analyzed. The results showed that oxidant chlorine has a great effect on the size and morphology of ruthenium powder, and stir can effective refine grain of (NH4)2RuCl6) in the precipitation process. With a saturated ammonium chloride solution as a precipitating agent and stirring during the precipitation, the (NH4)2RuCl6 crystal obtained by precipitation, is dried and then calcined at 800℃ for 6 h. The ruthenium oxide product is reduced in a hydrogen atmosphere at 750℃ for 30 min. The particle size of ruthenium powder obtained by reduction is about 5~20 μm and it is nearly spherical polygons, and glow discharge mass spectrometry (GDMS) analysis show that the ruthenium powder purity reached more than 99.95%.
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