Na2CO3 doping effect on ZnO–Pr6O11–Co3O4 ceramic varistor properties
| Autor: | Hsing I. Hsiang, Li Then Mei, Chi-Shiung Hsi, Fu Su Yen |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Praseodymium Scanning electron microscope Mechanical Engineering Doping Metallurgy Metals and Alloys Oxide Varistor chemistry.chemical_element Microstructure chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Ceramic Diffractometer |
| Zdroj: | Journal of Alloys and Compounds. 558:84-90 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2013.01.047 |
| Popis: | Suitable Na 2 CO 3 doping can enhance the varistor properties of ZnO–Pr 6 O 11 –Co 3 O 4 ceramics. X-ray diffractometer (XRD), thermo-gravimetry analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to investigate the Na + ion addition effects on the crystal phases, microstructure development and varistor properties of ZnO–Pr 6 O 11 –Co 3 O 4 ceramics. The results imply that sodium ions will dissolve into praseodymium oxide and promote oxygen vacancy formation in praseodymium oxide. This phenomenon will enhance the oxygen diffusion and formation of zinc vacancies at the grain boundary. The varistor characteristics of ZnO–Pr 6 O 11 –Co 3 O 4 ceramics can therefore be improved by adding Na 2 CO 3 . |
| Databáze: | OpenAIRE |
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