. 2018 Apr 21;8(4):261. doi: 10.3390/nano8040261

Table 3.

Positron lifetime and relative intensities of the pristine Bi₄Ti₃O₁₂ and various Bi₄Ti₃O_12−x samples.

Sample	τ₁ (ps)	τ₂ (ps)	τ₃ (ns)	I₁ (%)	I₂ (%)	I₃ (%)	I₁/I₂
Bi₄Ti₃O₁₂	193	376	2.33	50.24	47.78	1.98	1.05
Bi₄Ti₃O_12−x (350 °C, 20 min)	196	387	2.47	46.26	51.97	1.77	0.89
Bi₄Ti₃O_12−x (350 °C, 40 min)	199	389	2.49	38.72	59.64	1.64	0.65
Bi₄Ti₃O_12−x (350 °C, 60 min)	205	393	2.77	23.87	74.24	1.89	0.32
Bi₄Ti₃O_12−x (350 °C, 80 min)	209	396	2.92	36.48	61.57	1.95	0.59
Bi₄Ti₃O_12−x (350 °C, 100 min)	214	402	3.05	41.73	56.42	1.85	0.74
Bi₄Ti₃O_12−x (400 °C, 60 min)	216	405	3.11	44.86	53.33	1.81	0.84