One-dimensional carbon nanotube@barium titanate@polyaniline multiheterostructures for microwave absorbing application

Table 1 Microwave absorption properties of samples

Sample (thickness of CNT@BaTiO ₃ @PANI)	Microwave absorption properties of samples
Sample (thickness of CNT@BaTiO ₃ @PANI)	RL _m (dB)	f _m (GHz)	Frequency range (GHz) (RL < −10 dB)	Frequency range (GHz) (RL < −20 dB)
1 mm	−6.25	15.0	0	0
2 mm	−17.82	15.0	12.1 ~ 15	0
3 mm	−28.95	10.7	7.9 ~ 15	10 ~ 15
4 mm	−23.94	6.7	5 ~ 15	6.4 ~ 6.9/7.5 ~ 8
5 mm	−18.01	4.5	4.0 ~ 6.5/11.4 ~ 15	0
6 mm	−22.27	3.7	3.1 ~ 4.6/11.4 ~ 15	3.5 ~ 3.9

RL_m, minimum reflection loss value; f _m, frequency at which the reflection loss is at its minimum.