Production of nanopowder and bulk aluminate ceramic scintillators
| Autor: | N. Jalabadze, R. Chedia, L. Khundadze, L. Nadaraia |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Process Chemistry and Technology Aluminate Analytical chemistry Spark plasma sintering chemistry.chemical_element Mineralogy Yttrium Lutetium Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Thermogravimetry chemistry.chemical_compound chemistry law visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Crystallization Perovskite (structure) |
| Zdroj: | Ceramics International. 39:2207-2214 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2012.09.018 |
| Popis: | The developed nanotechnology makes it possible to prepare lots of standard powders of Aluminates such as lutetium and yttrium orthorombic LuAlO 3 , YAlO 3 (LuAP, YAP – perovskite), aluminum garnets Lu 3 Al 5 O 12 , Y 3 Al 5 O 12 (LuAG, YAG) with cubic structure and aluminates with monoclinic structure Lu 4 Al 2 O 9 , Y 4 Al 2 O 9, (LuAM, YAM). Powders of scintillation materials are prepared by sol-gel method, co-precipitation method and a combination of sol-gel method with combustion reactions. Crystallization process of LuAG phase starts at 900 °C. At lower temperatures, during the pyrolysis of the gel, amorphous powders have been produced. After pyrolysis of the gels without additives of aminoacetic acid a mixture of LuAG+Lu 2 O 3 has been formed instead of LuAP. New phase of LuAP in a cubic form is detected. Diffraction peak profile analyzes and scanning electron microscope (SEM) investigations are performed to approximately establish grain size of the obtained powder. Thermogravimetry analysis (TGA) was carried out for detection of thermal effects in the range up to sintering temperature. Perovskite phases of aluminates have been synthesized via pyrolysis (at |
| Databáze: | OpenAIRE |
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