| 摘要 |
Novel radiation attenuating material made of plastic material comprising a metallic filler consisting of a combination of at least two, preferably, three metals or metal derivatives (oxides or alloys) of different type, except lead, selected on the basis of discontinuities of the X- or gamma radiation absorption curve of the metals or metal derivatives, so as to obtain complementarity of the curves on the energy range of radiation to be absorbed or attenuated, to optimise radiation protection on the energy range. The metallic filler is preferably in the form of a powder whereof the particle dimensions are for the major part less than 50 mum. The filler is present in proportions ranging between 70 and 95% of the weight of the final material and is selected preferably among dense metals such as tungsten, tin, bismuth, barium, antimony, lanthanides, tantalum or derivatives thereof, in particular oxides and alloys.
|
