Various options for the synthesis of aluminum acrylates, including substituted hydroxoacrylates, as well as an adduct of aluminum isopropylate with allylamine, have been tested in order to develop a mixture that can be formed by photopolymerization, followed by annealing while maintaining the shape of the ceramics, meaning further molding using stereolithographic 3D printing. By photopolymerization of a polymer precursor based on an acrylate suspension of in situ synthesized alumoxane of the Al(OH)2(ООСН2СН=СН2), corundum ceramics of a given shape were prepared. The inhomogeneity of the polymer precursor is not an obstacle to its use in technology. A significant percentage of weight loss during heat treatment of a polymer precursor suggests its possible use as a binder when filled with dispersed aluminum oxide powder. The strongest shrinkage of a ceramic product occurs in the range of 200 – 400 °C; it is necessary to develop a special program for heating the product to the sintering temperature in order to minimize the consequences of severe shrinkage. When a molded product is heat treated in an inert atmosphere, the shrinkage is less than when annealed in air, since a large amount of amorphous carbon remains during pyrolysis. Annealing such ceramics with amorphous carbon in a nitrogen atmosphere is promising for carrying out the carbonitridization process in the preparation of aluminum nitride and oxynitride.
