S inside the , the average particle sizeparticle siz particles changes in
S inside the , the average particle sizeparticle siz particles modifications inside the range 0.52 variety 0.52 m, the typical is six , and some agglomerates of barium hexaferrite particles are observed. Within the case of Within the and some agglomerates of barium hexaferrite particles are observed. BaFe11.1 Ga0.9 O19 powders, the particles’ size isparticles’higher (0.74 , typical size is average BaFe11.1Ga0.9O19 powders, the slightly size is slightly higher (0.74 m, 7), plus a larger numberaof agglomeratedof agglomerated barium hexaferrite particles are type m), and larger number barium hexaferrite particles are formed. Epoxy composites together with the combined filler CNT/BaFe12 Gax O19 had been ready. A prepar Epoxy composites with all the combined filler CNT/BaFe12 GaxO19 have been detailed description with the composite the composite fabricationrandom and aligned filler aligned tailed description of fabrication technique with strategy with random and distributions wastributions was presented inpaper [26]. The use of ultrasonic dispersion presented in our preceding our preceding paper [26]. The use of ultrasonic disp in the composite the composite mixture permits RP101988 Autophagy de-agglomeration ofhexaferrite filler and filler a mixture allows de-agglomeration of your barium the barium hexaferrite a uniform distributiondistribution of fillers in the epoxy The contents of fillers in epoxyepoxy co type of fillers within the epoxy matrix. matrix. The contents of fillers in composites were as follows: BaFe12 Gax O19 0 wt. , CNT wt. . were as follows: BaFe12 GaxO190 wt. , CNT wt. . Microwave scalar network analyzers P2-67 inside a 365.5 GHz frequen were utilized for measurements of the standing wave ratio (SWR) and transmissio cient T with the investigated CMs at area AAPK-25 Apoptosis temperature. Measurements applying s operate analyzers have been performed for specimens with dimensions of 5.two two.6 two.Nanomaterials 2021, 11,four ofMicrowave scalar network analyzers P2-67 inside a 365.five GHz frequency variety have been utilized for measurements on the standing wave ratio (SWR) and transmission coefficient T in the investigated CMs at room temperature. Measurements working with scalar network analyzers have been performed for specimens with dimensions of 5.two two.6 2.six mm3 . The measurement configuration was such that the path of alignment in the filler within the sample was across the path of the incident wave. The shielding effectiveness SET (in dB) is related to the measured EMR transmission index T applying the following equations: SET = 10 log T (1)exactly where T = | ET /E I |2 , E I , ET will be the electric field strengths from the incident and transmitted waves. three. Benefits and Discussion three.1. Amplitude-Frequency Characteristics of NFMR The frequency dependencies of your electromagnetic response (shielding efficiency SET ) for epoxy composites with BaFe12 Gax O19 and 1 BHT/BaFe12 Gax O19 for random Nanomaterials 2021, 11,and oriented distributions of fillers are shown in Figure 2, which also shows the five of 13 of x FOR PEER Review curve SET ( f ) for the 1 CNT/epoxy composite [27,28] and pressed BaFe12 Gax O19 samples for comparison. As may be seen from the figure, in the frequency f 50 GHz, there is a minimumminimum on the) curvef for all studied samples corresponding toto thelower-order on the SET ( f SET curve for all studied samples corresponding the lower-ornatural ferromagnetic resonance resonance (NFMR) modes. The minimum of is mostmost der all-natural ferromagnetic (NFMR) modes. The minimum of SET SET is clearly pronounced for pronounced for pressednanocrystalline B.