COMPOSITE LEAD-FREE MATERIALS FOR PROTECTION AGAINST IONIZING AND NON-IONIZING ELECTROMAGNETIC FIELDS AND RADIATION
DOI:
https://doi.org/10.26906/SUNZ.2024.2.179Keywords:
composite material, ionizing, non-ionizing radiation, shielding factorAbstract
The protective properties of materials for shielding non-ionizing and ionizing electromagnetic fields and radiations inherent in medical equipment have been developed and studied. It has been shown that it is advisable to shield stationary magnetic fields with amorphous cobalt and crystalline iron-nickel alloys of small thickness. Their combination avoids the dependence of the shielding coefficient on the magnetic field strength. The protective properties of compositions based on latex and barium sulfate for shielding X-rays have been developed and studied. It was found that at a material thickness of 5 mm, shielding coefficients of 1.4-5.8 can be obtained, depending on the filler content. The protective properties of compositions based on latex and tungsten oxide for shielding gamma radiation have been developed and studied. It was determined that with a material thickness of 5 mm, it is possible to obtain shielding coefficients of 1.1-3.8, depending on the content of the shielding substance. The content of barium sulfate and tungsten oxide at 30 % by weight does not affect the homogeneity of the materials after drying. No surface cracking was detected. The advantage of the obtained compositions is the possibility of their application in a liquid state. Tests of the adhesive properties of the mixtures when applied to concrete and drywall show that they meet the requirements of State Standard ISO 2409:2019. This makes it possible to apply the mixtures to surfaces of any shape in several layers, which makes it possible to adjust the shielding coefficients depending on the radiation and electromagnetic environment.Downloads
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