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. 2017 May 19;10(5):537. doi: 10.3390/ma10050537

Figure 2.

Figure 2

EDX Analysis of salt mixture (60% NaNO3 and 40% KNO3) with 1.65 wt. % CuO. The composite picture is an overlay of the SEM and the elemental analysis of the sample. The presence of aluminum come from the SEM stub.