Mullite glass-ceramics were prepared with varying concentrations of Cr(III). The X-ray absorption, emission and EPR spectra reveal that the most defined crystals are formed at the lowest concentration of Cr(II1). The concentration quenching of the luminescence is small and the quantum efficiencies h
Spectroscopy of chromium(III) in β-quartz and petalite-like transparent glass ceramics: Ligand field strengths of chromium(III)
✍ Scribed by A. Kisilev; R. Reisfeld; E. Greenberg; A. Buch; M. Ish-Shalom
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 320 KB
- Volume
- 105
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Absorption, eMon and excitation spectra of c~o~um~II1~ were cittzained For tfanspaient glass ocramics mntaining @+artz and petaliteiike phases. Emission from the 2E and 4T, levels was obserwd si.muItaneousIy at room temperafure. Ligand field strengths of Cr(IIr) m the crystxlhe phare are comparable to those abtained in materials which pro-de hi@tield CMJII) sites, while in the &my phase low-field sites are observed.
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