The structure of the emission spectrum in the near-UV range (240 nm-310 nm) changes drastically from the continuous spectrum to a discrete line spectrum with increasing sample temperature during the carbothermic reduction of magnetite in a 2.45 GHz microwave multimode furnace. The continuous spectrum can be assigned as a cathodoluminescence of magnetite. The dynamic evolution of the spectrum from continuous to discrete represents the progress of the reduction from magnetite to iron.

中文翻译：

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与微波炼铁过程中的还原过程相关的近紫外发射光谱的演变

在 2.45 GHz 微波多模炉中碳热还原磁铁矿期间，随着样品温度的升高，近紫外范围 (240 nm-310 nm) 的发射光谱结构从连续光谱急剧变化为离散线光谱。连续光谱可以指定为磁铁矿的阴极发光。光谱从连续到离散的动态演化代表了从磁铁矿到铁的还原过程。