Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7887146 | Ceramics International | 2018 | 10 Pages |
Abstract
Plasma electrolytic oxidation (PEO) is commonly known as a coating technique. However, the present study shows that PEO of pure Al in 10â¯gâ¯lâ1 Na2WO4·2H2O leads to the synthesis of micro and nano sized powders of WO3. The as-synthesized WO3 powders have been characterized by SEM, TEM and photocatalytic tests. The plasma discharges during the PEO process have been investigated by real-time imaging and spectrographic method. The energetic features of the single discharge at different stages of PEO have been evaluated. It was suggested that the electrolyte species were directly decomposed into tungsten oxides within the discharge channels and then the oxides re-entered the electrolyte due to the lower melting and boiling points of WO3, and more importantly, its tendency of sublimation.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Tingyan Zhan, Wenbin Tu, Yulin Cheng, Junxiang Han, Bin Su, Yingliang Cheng,