The article investigates the influence of the reduction modes of hollow nickel oxide microspheres synthesized by the pyrolysis of ultrasonic aerosols on the ratio of the oxide and metallic forms of nickel in their structure. The synthesis of microspheres from an aerosol of an aqueous solution of nickel nitrate was carried out; their composition and morphology were studied. The reduction of microspheres was carried out in a stream of hydrogen at different temperatures. The ratio of metallic nickel and oxide was determined by two different methods: according to the data of thermogravimetric analysis and by the Rietveld method based on the results of x-ray phase analysis. It is shown that the proportion of metallic nickel increases with an increase in the reduction temperature to approximately 375°C and then changes insignificantly. The fractional composition of microspheres was determined.

本文研究了超声气溶胶热解合成的空心氧化镍微球的还原方式对其结构中镍的氧化物和金属形态比率的影响。由硝酸镍水溶液的气溶胶合成微球。研究了它们的组成和形态。微球的还原是在不同温度的氢气流中进行的。通过两种不同的方法确定金属镍和氧化物的比例：根据热重分析的数据，以及基于X射线相分析结果的Rietveld方法。结果表明，金属镍的比例随着还原温度的升高而升高，达到约375°C，然后变化不大。