Cold Sintering Process of Zinc Oxide Ceramics: Powder Preparation and Sintering Conditions Effects on Final MicrostructureстатьяИсследовательская статья
Статья опубликована в журнале из списка Web of Science и/или Scopus
Аннотация:Although the activating effect of an acetate medium in the cold sintering process of zincoxide ceramics is well known, some problems need to be solved on the effect of process conditionsand the initial powder’s preparation methods on the ceramic’s density and microstructure. Thisarticle describes an effect of the zinc acetate introduction method, its concentration in zinc oxidepowder as well as that of the die sealing configuration on the density and microstructure of zincoxide ceramics obtained by the cold sintering process at 244 °C. The activating additive of zinc acetate was applied in two ways: (1) impregnation in aqueous solution and (2) impregnation with subsequent treatment in water vapor. Zinc oxide powders and ceramics were analyzed using SEM,TGA/DSC/MS and XRD to reveal the effect of powder pre-treatment and sintering conditions onthe material microstructure. Cold sintered ZnO ceramics samples with a relative density up to 0.99and with average grain sizes from 0.28 to 1.71 μm were obtained. The die sealing by two Teflonsealing rings appeared to be the most effective.
