Спікання кубічного оксиду цирконію — матриці для іммобілізації високоактивних відходів
Sintering of compacts from nanosized cubic zirconia powder containing 10 % mas. oxide of yttrium (stabilizer of structure) and 15% mas. oxide of europium (dummy chemical of actinide americium) was investigated. The ceramic matrix for immobilization of actinide from cubic zirconia with relative densi...
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| Видавець: | State Scientific and Technical Center for Nuclear and Radiation Safety |
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| Дата: | 2009 |
| Автори: | , , , , , , , |
| Формат: | Стаття |
| Мова: | Ukrainian |
| Опубліковано: |
State Scientific and Technical Center for Nuclear and Radiation Safety
2009
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| Онлайн доступ: | https://nuclear-journal.com/index.php/journal/article/view/812 |
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Репозиторії
Nuclear and Radiation Safety| Резюме: | Sintering of compacts from nanosized cubic zirconia powder containing 10 % mas. oxide of yttrium (stabilizer of structure) and 15% mas. oxide of europium (dummy chemical of actinide americium) was investigated. The ceramic matrix for immobilization of actinide from cubic zirconia with relative density of 95,4 %, with grains having size 4-6 mm and pores of three intervals of sizes (0,85-1,1 mm, 0,4 -0.6 mm and 0,20,3 mm) was produced at optimum temperature 1400 °C within 1 hour. Sintering runs intensively at temperatures between 9001200 °C and is less active in the range of 1200—1400 °C. Activation energies of sintering equal 40,1 ±2,1 kJ/mol and 7,1 ±2,1 kJ/mol accordingly. Ceramic material has moderated (700-900 °C) and intensive (900-1400 °C) grain growth. Activation energies of grain growth in the specified intervals of temperatures equal 12,8 ±5,1 kJ/mol and 191 ± 10 kJ/mol accordingly. |
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