Crystallization of Bi2Sr2Cu1O6 and Bi2Sr2Ca1Cu2O8 Phases in Bi-Sr-Ca-Cu-O Glass
| Autor: | B. Koscielska, L. Wicikowski, Leon Murawski, B. Kusz |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Annealing (metallurgy) Analytical chemistry Mineralogy chemistry.chemical_element General Chemistry Condensed Matter Physics Microstructure Copper law.invention Differential scanning calorimetry chemistry X-ray photoelectron spectroscopy law General Materials Science Crystallite Fourier transform infrared spectroscopy Crystallization |
| Zdroj: | Crystal Research and Technology. 36:925-931 |
| ISSN: | 1521-4079 0232-1300 |
| DOI: | 10.1002/1521-4079(200110)36:8/10<925::aid-crat925>3.0.co;2-f |
| Popis: | Crystallization of Bi 4 Sr 3 Ca 3 Cu 4 O x glass at 472°C and 800°C for the different duration, studied by X-ray diffraction, X-ray photoelectron spectroscopy, atomic force microscopy, differential scanning calorimetry, termogravimetric analysis and Fourier transform infrared spectroscopy is reported. Crystallization at the temperature 472°C leads to the formation of Bi 2 Sr 2 Cu 1 O 6 phase. This phase forms granular structure with randomly distributed grains in the glassy matrix. It was found that oxygen needed for the crystallization of the Bi 2 Sr 2 Cu 1 O 6 phase is taken from glassy matrix and involves a change in the valency state of copper ions from Cu +1 to Cu 2+ during crystallization. Annealing at 800°C gives mainly Bi 2 Sr 2 Ca 1 Cu 2 O 8 phase. After 200 h of heat treatment at this temperature, Bi 2 Sr 2 Cu 1 O 6 phase, Bi 2 Sr 2 Ca 2 Cu 3 O 10 phase and Cu 2 O was also observed. |
| Databáze: | OpenAIRE |
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