Аннотации:
The purpose of this paper is to study the effect of PbO doping of multicomponent composite
glass-like ceramics based on TeO2
, WO3
, Bi2O3
, MoO3
, and SiO2
, which are one of the promising
materials for gamma radiation shielding. According to X-ray diffraction data, it was found that the
PbO dopant concentration increase from 0.10 to 0.20–0.25 mol results in the initialization of the phase
transformation and structural ordering processes, which are expressed in the formation of SiO2 and
PbWO4 phases, and the crystallinity degree growth. An analysis of the optical properties showed
that a change in the ratio of the contributions of the amorphous and ordered fractions leads to the
optical density increase and the band gap alteration, as well as a variation in the optical characteristics.
During the study of the strength and mechanical properties of the synthesized ceramics, depending
on the dopant concentration, it was found that when inclusions in the form of PbWO4 are formed
in the structure, the strength characteristics increase by 70–80% compared to the initial data, which
indicates the doping efficiency and a rise in the mechanical strength of ceramics to external influences.
During evaluation of the shielding protective characteristics of the synthesized ceramics, it was
revealed that the formation of PbWO4
in the structure results in a rise in the high-energy gamma ray
absorption efficiency
