Figure 1.
A) Cutout of PXRD patterns of β-Bi2O3-5 and β-Bi2O3-300 to show the broadening of the reflexes in dependence of the annealing time at 370 °C (reference: β-Bi2O3, ICDD 00-027-0050). B) A plot of the particle size determined by the Scherrer equation versus annealing time at 370 °C.