Synthesis of Preceramic Precursor Based on Organic Aluminum Salts for Stereolithographic 3D Printing of Corundum Ceramics

Orlov, N.K.; Evdokimov, P.V.; Milkin, P.A.; Tikhonov, A.A.; Tikhonova, S.A.; Klimashina, E.S.; Zuev, D.M.; Kapitanova, O.O.; Putlayev, V.I.

Авторы: Orlov N.K., Evdokimov P.V., Milkin P.A., Tikhonov A.A., Tikhonova S.A., Klimashina E.S., Zuev D.M., Kapitanova O.O., Putlayev V.I.
Журнал: Inorganic Materials: Applied Research
Том: 12
Номер: 5
Год издания: 2021
Первая страница: 1358
Последняя страница: 1367
DOI: 10.1134/S2075113321050300
Аннотация: Variants for the synthesis of aluminum acrylates, including substituted hydroxoacrylates, as well as an adduct of aluminum isopropylate with allylamine, were tested to develop a mixture that can be formed by photopolymerization, followed by annealing while maintaining the shape of the ceramic, for further use in molding using stereolithographic 3D printing. By photopolymerization of a polymer precursor based on an acrylate suspension of in situ synthesized alumoxane Al(OH)2(ООСН2СН=СН2), corundum ceramics of a given shape were prepared. The inhomogeneity of the polymer precursor does not prevent its use in technol- ogy. A significant percentage of weight loss during heat treatment of the polymer precursor suggests its pos- sible use as a binder when filled with dispersed aluminum oxide powder. The highest shrinkage of a ceramic product occurs in the range of 200–400°C; it is necessary to develop a special program for heating up the product to the sintering temperature 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 pyrolysis leaves behind a large amount of amorphous carbon. Annealing such ceramics with amorphous carbon in a nitrogen atmosphere is promising for carrying out the carbonitridization process in the preparation of alumi- num nitride and oxynitride.
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Synthesis of Preceramic Precursor Based on Organic Aluminum Salts for Stereolithographic 3D Printing of Corundum Ceramicsстатья

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