论文部分内容阅读
在直径180mm、长径比分别为5∶1、2.2∶1和1.5∶1的三类不同热解器中,各自采用单一羰基镍蒸气,以室温氮气作稀释气体及以预热氮气兼作稀释气体和分解热源的三种不同Ni(CO)_4热分解方式,并控制各个热解变数,可分别制得微米级、0.06～0.1μm和0.02～0.05/μm粒度悬殊的羰基镍粉。根据大量试验数据的分析,详细探讨了热分解诸参数对镍粉粒度或比表面的影响,从而阐明了Ni(CO)_4气相热解的制粉规律。本文也研究了热解温度、N_2/Ni(CO)_4比例(稀释比)及稀释气体中H_2含量对镍粉中碳、氧含量的影响,并讨论了其起因。
Three different types of pyrolyzer with a diameter of 180 mm and an aspect ratio of 5: 1, 2.2: 1 and 1.5: 1, each using a single carbonyl nickel vapor at room temperature with nitrogen as diluent gas and with preheated nitrogen as diluent gas And decomposition of the heat source of three different Ni (CO) _4 thermal decomposition mode, and control the pyrolysis variables, respectively, micron, 0.06 ~ 0.1μm and 0.02 ~ 0.05 / μm particle size distribution of carbonyl nickel powder. According to the analysis of a large number of experimental data, the effects of the parameters of thermal decomposition on the particle size or specific surface of nickel powder are discussed in detail, and the law of milling of the gas phase pyrolysis of Ni (CO) _4 is clarified. The effects of pyrolysis temperature, N 2 / Ni (CO) 4 ratio (dilution ratio) and H 2 content in dilute gas on the contents of carbon and oxygen in nickel powder were also studied.