Different processes for the preparation of fluorozirconate glasses
| Autor: | Rosaria Chiappetta, Marco Braglia, Monica Ferraris, Eros Modone, Giuseppe Cocito |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Infrared
Chemistry Mechanical Engineering Inorganic chemistry Infrared spectroscopy Ammonium bifluoride Condensed Matter Physics Nitrogen trifluoride law.invention chemistry.chemical_compound Mechanics of Materials law ZBLAN X-ray crystallography General Materials Science Electron paramagnetic resonance Fluoride Nuclear chemistry |
| Zdroj: | Materials Research Bulletin. 25:891-897 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/0025-5408(90)90067-c |
| Popis: | Different processes for the preparation of fluorozirconate glasses (ZBLAN) have been investigated by infrared spectroscopy (IR) and x-ray diffraction (XRD) on fluoride powders, during the reaction. Glasses have been prepared with 20-10-5-0 (% weight) ammonium bifluoride (NH4F·HF) or with nitrogen trifluoride (NF3) as fluorinating agent. In order to improve the quality of the glasses, small percentages (about 5%) of NH4F·HF are a good compromise between fluorination and hydration of starting products; NF3 is very effective during the fluorination step of the preparation: our electron spin resonance measurements (ESR) on these last glasses after γ-irradiation (20 Mrad), do not detect any O2 signal. |
| Databáze: | OpenAIRE |
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