Microwave gel combustion synthesis and sinterability of Nd:GGG nanopowders
| Autor: | Neelam Malhan, Rekha Mann, Kiranmala Laishram |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Scanning electron microscope Doping Mineralogy chemistry.chemical_element General Chemistry Microstructure Neodymium law.invention chemistry Geochemistry and Petrology law visual_art visual_art.visual_art_medium Calcination Particle size Ceramic Fourier transform infrared spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Rare Earths. 32:521-525 |
| ISSN: | 1002-0721 |
| DOI: | 10.1016/s1002-0721(14)60102-2 |
| Popis: | Neodymium doped gadolinium gallium oxide (Nd:GGG) nanopowders synthesized by microwave gel combustion using alanine as a fuel was reported. Metal nitrates solution with alanine fuel was combusted in microwave to give precursor. The microwave precursor powder was calcined at different temperatures from 800 to 1100 °C. Phase pure Nd:GGG formation took place at 800 to 1100 °C as observed by X-ray diffraction (XRD) and Fourier transform infra-red (FTIR) spectroscopy. However particle size increased with calcinations temperature from 25 nm at 800 °C to 200 nm at 1100 °C. Nd:GGG nanopowder obtained at different calcination temperatures were compacted and sintered at 1550 °C for 3 h in air. Most densified ceramic was obtained from Nd:GGG nanopowder calcined at 1100 °C. Microstructure as observed from scanning electron microscopy (SEM) showed that the most densified ceramic, obtained from nanopowder calcined at a higher calcination temperature, had a more uniform grain-size distribution, fewer pores and greater densification. XRD of sintered sample showed retention of phase purity. |
| Databáze: | OpenAIRE |
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