Atmospheric pressure air plasma treated alumina powder for ceramic sintering

作者：Szalay Zsolt^*; Bodisova Katarina; Palkova Helena; Svancarek Peter; Durina Pavol; Rahel Jozef; Zahoranova Anna; Galusek Dugan

来源：Ceramics International, 2014, 40(8): 12737-12743.

DOI：10.1016/j.ceramint.2014.04.124

• Grain size
• Al2O3
• Colloidal stability
• Plasma treatment

We report on plasma surface treatment of sub-micron alumina powder by the Diffuse Coplanar Surface Barrier Discharge (DCSBD) in ambient air. Even though the isoelectric point did not change after plasma treatment, the results indicated an enhanced colloidal stability of treated powder, especially when ultrasonication was used as homogenization method. Suspensions prepared from plasma treated powder also exhibit lower pH values compared to those of original powder. FTIR analysis confirmed enhanced sorption ability of treated powder. Polycrystalline alumina ceramics prepared from the treated powder possess significantly finer microstructure compared to those prepared from untreated powders. These findings may have a significant impact on ceramic engineering.

• 出版日期2014-9