Optimization of the composition and sintering conditions of high-voltage ZnO varistor ceramics
| Autor: | E. P. Lokshin, Yu. A. Savel’ev, O. G. Gromov, A. T. Belyaevskii, E. L. Tikhomirova |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science General Chemical Engineering Metallurgy Metals and Alloys Sintering Allowance (engineering) High voltage 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Isothermal process Varistor ceramics Inorganic Chemistry visual_art 0103 physical sciences Materials Chemistry visual_art.visual_art_medium Relative density Composition (visual arts) Ceramic 0210 nano-technology |
| Zdroj: | Inorganic Materials. 53:536-539 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s0020168517050089 |
| Popis: | This paper presents a study aimed at optimizing the composition and sintering conditions of highvoltage ZnO varistor ceramics. We demonstrate that, with allowance for the cost of starting materials, the optimal composition of high-voltage ZnO varistor ceramics is as follows (wt %): ZnO, 90; Bi2O3, 2.76; Sb2O3, 1.92; Al2O3, 3.32; and Co2O3, 2. The optimal sintering conditions are isothermal holding at a temperature of 975°C for 2 h. The ceramics thus prepared have V b = 4.5 kV/mm, α = 50, I l = 1.1 μA/cm2, density ρ = 5.67 g/cm3 (relative density of 96.1%). |
| Databáze: | OpenAIRE |
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