Study of the Phase Formation Processes and Their Influence on the Change in the Optical and Shielding Characteristics of 0.25ZnO–0.25Al2O3–0.25WO3–0.25Bi2O3 Ceramics

The phase formation processes in 0.25ZnO–0.25Al2O3–0.25WO3–0.25Bi2O3 ceramics with variation the thermal annealing temperature were evaluated this study. According to obtained data on composition dependent temperature, transformation dynamics, which can be written form of ZnO/Bi2O3/WO3/Al2O3 → ZnBi38O60/ZnO/Bi2WO6/WO3 Bi2Al4O9/ZnBi38O60/Bi2WO6/ZnO/WO3 ZnWO4/Bi2WO6/ZnAl2O4/ZnO ZnWO4/Bi2WO6/ZnAl2O4 Bi2WO6/ZnWO4/ZnAl2O4 ZnAl2O4/Bi2WO6/Bi2W2O9, established. It has been found that phases complex oxides ZnWO4, Bi2WO6 and Bi2W2O9 types leads an increase density up 8.05–8.10 g/cm3, positively affects shielding efficiency strength characteristics. change characteristics, it was a from 6.3 g/cm3 strengthening crack resistance by 75–80%, indicates high their increased external influences. As shown evaluation due decrease gamma intensity factor 3–3.5. At same time, base presented, concluded range 900–1100 °C have both characteristics