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Particle size distribution, thermal gravimetric (TG), and differential thermal analysis (DTA) curves of the mixtures ball-milled for different time. (a) Particle size distribution of the mixtures ball-milled for 4, 8 and 16 h, respectively; (b) TG and (c) DTA curves of the mixtures ball-milled for 4, 8 and 16 h. The insert of 1,2,3,4 and 5 in Figure 1b show weight loss peaks associated with endothermic peaks of inserted 1,2,3 and 4 in Figure 1c.
