Table 2.

Nano-HAP particle sizes obtained from XRD and FESEM in terms of ultrasound power and thermal treatment temperature

Particle size (nm ± 5%)		Temperature
Technique	Ultrasound power (W)	100°C	200°C	300°C	400°C
XRD	0	230	230	230	180
	25	88	44	36	32
	50	58	35	30	25
FESEM	0	150	140	170	130
	25	72	60	43	36
	50	48	40	28	26

Abbreviations: HAP, hydroxyapatite; XRD, X-ray diffraction; FESEM, field emission scanning electron microscopy.