Condensation of Organoyttriumoxanalumoxanes with Chromium Acetylacetonate

The process of organoyttriumoxanealumoxanes co-condensation with chromium acetylacetonate has been studied, as a result chromium-containing organoyttriumoxanealumoxanes were obtained, which are ceramic-forming oligomers and may have fiber-forming properties. Their physicochemical characteristics have been determined by NMR, IR spectroscopy, SEM, TGA, XRD and elemental analysis. It has been found that when the molar ratio of chromium-containing organoyttriumoxanealumoxanes is Al/Y ≈ 2 and Al/Cr ≈ 180 they have fiber-forming properties. Polymer fibers were produced from chromium-containing organoyttriumoxanealumoxanes by melt spinning. The process of thermochemical transformation of synthesized chromium-containing organoyttriumoxanealumoxanes into the ceramic phase has been studied. It is found out that the pyrolysis of chromium-containing organoyttriumoxanealumoxanes leads to the formation of Y 3 (Cr x Al 1−x ) 5 O 12 , YAl y Cr 1-y O 3 and α-(Al 2−x Cr x O 3 ). That is, these oligomers can be used to create a new generation of heatresistant, optically-transparent, corrosion—and radiation-resistant multicomponent ceramics based on aluminum, yttrium and chromium oxides. Graphic Abstract