Synthesis and characterizations of Y3Fe5O12-MWCNTs composites for SBL application

Sea bed logging is a new technology being implemented for deep target exploration. In seabed logging, the magnitude of electromagnetic (EM) wave for detection of hydrocarbon reservoir is very important and still remained challenge. New Al transmitter with (Y₃Fe₅O₁₂ with and without MWCNTs) magnetic feeders was used in a marine scaled tank to enhance the magnetic field strength. Experiments were done in marine lab scale tank to replicate the real seabed environment. Y₃Fe₅O₁₂ with and with out multiwall carbon nano tubes (MWCNTs) were synthesized by using sol gel-self combustion hybrid method. Samples were sintered at 550°C, 750°C and 1050°C to get the required characteristics of the garnet nanoparticles. Y₃Fe₅O₁₂ samples with and without MWCNTs were characterized by using XRD, RAMAN, FESEM and Impedance network analyzer. X-ray diffraction results revealed that the best Y₃Fe₅O₁₂ phase was appeared at the sintering temperature of 1050°C. Nanoparticles sizes ranging from 70 to 110 nm were obtained by using sol gel-self combustion hybrid method. Raman results also demonstrate the confirmation of garnet structure of Y₃Fe₅O₁₂ at sintering temperature of 1050°C. Field emission scanning electron microscopy (FESEM) was used to see the morphology of Y₃Fe₅O₁₂ with and with out MWCNTs composites. Magnetic characterization results illustrates that Y₃Fe₅O₁₂ with MWCNTs at 1050°C has higher Initial permeability (33.302) and high Q-factor (55.104), where as low loss factor (0.0003) was also investigated for Y₃Fe₅O₁₂ - MWCNTs composites. It was observed that by using Y₃Fe₅O₁₂-MWCNTs polymer composites toroid as magnetic feeders resulted 210% in- rease in magnetic field strength.