Plasma dynamic synthesis of composite ZnO-Bi2O3 material with a core-shell structure for varistor ceramics
| Autor: | Ivan Shanenkov, Iliyas Rakhmatullin, Alexander Sivkov, Yuliya Shanenkova, Alexander Ivashutenko, Liliya Osokina |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Process Chemistry and Technology Composite number Spark plasma sintering Varistor 02 engineering and technology Plasma Intergranular corrosion 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Grain size 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Crystallite Ceramic Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 44:22808-22815 |
| ISSN: | 0272-8842 |
| Popis: | Zinc oxide has been studied for many years and found many applications in different areas, including the power engineering, where the ZnO-based ceramics could be used as a varistor. However, there is a necessity to add different oxides to ZnO to make a uniform ceramics structure with well enough nonlinear characteristics. In this regard, the uniform distribution of additives in the structure of a composite based on ZnO becomes an urgent task to prepare the high-quality ceramics. This work shows the possibility to obtain the composite powdered material with the uniformly distributed Bi2O3 addition in the ZnO crystallites by a plasma dynamic method. The features of this method and flowing reactions allow forming the ZnO-Bi2O3 particles with the core-shell structure. The spark plasma sintering of the ZnO-Bi2O3 composite material with such particles structure provides the production of varistor ceramics characterized by a fine-grained ZnO structure (average grain size is about 1 µm) with uniformly filled intergranular spaces by Bi2O3. The comparison of voltage-current characteristics with the ceramics made of ball-milled commercial powders showed the prospects of using as-prepared ZnO-Bi2O3 composite with core-shell structure. |
| Databáze: | OpenAIRE |
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