Abstract
The temperature conditions of sintering of corundum ceramics affect the rate of subsequent metallization and the catalytic activity of metallized high-porosity cellular material. The process of chemical silvering of the material under study from a solution containing (g L–1): 2 silver nitrate, 54 glucose, and 1,5-oxyethylidene diphosphonic acid, as complexing ligand, was developed. The influence of the velocity of electrolyte flow on the uniformity of metal distribution within the high-porosity cellular material was determined. A technology was developed for the surface pretreatment of corundum ceramics before metallization, including degreasing with white spirit, etching in a mixture of hydrofluoric and sulfuric acids, and palladium activation, which makes it possible to obtain continuous, fine-crystalline coatings with good adhesion and high catalytic activity.
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Asnis, N.A., Vasilenko, O.A., Gasparyan, M.D. et al. Silvering of High-Porosity Cellular Ceramic Materials. Russ J Appl Chem 93, 1518–1524 (2020). https://doi.org/10.1134/S1070427220100055
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DOI: https://doi.org/10.1134/S1070427220100055