The Oxygen Generation Performance of Hollow-Structured Oxygen Candle for Refuge Space

Figure 10

The macroscopic and microscopic morphology of the oxygen candles before and after combustion. Microscopic morphology of cobalt(II,III) oxide (a) and its local enlargement (b) by SEM; macroscopic morphology of the oxygen candles after combustion (c, d); microscopic morphology of fresh section of the oxygen candles after combustion (e) by SEM.