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Figure 6
DSC thermograms of β powder crystals after (a) 0 min of milling and (b) 90 min of milling at different heating rates. Estimation of the apparent activation energy by (c) the Ozawa model and (d) the Kissinger model. n1: the first phase transition of non-milled β powders; m1 and m2: the first and second phase transitions of β powder crystals after 90 min of milling. The β → α phase transition process described by the Jeziorny model for (e) the non-milled polycrystalline powders and (f) polycrystalline powders after 90 min of milling.

IUCrJ
Volume 8| Part 4| July 2021| Pages 584-594
ISSN: 2052-2525
https://doi.org/10.1107/S2052252521004401