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Laser spectroscopy of chromium (III) in gahnite crystals and transparent gahnite-type glass-ceramics

โœ Scribed by Vincent Poncon; Mehdi Bouderbala; Georges Boulon; Anne-Marie Lejus; Renata Reisfeld; Alla Buch; Moshe Ish-Shalom


Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
286 KB
Volume
130
Category
Article
ISSN
0009-2614

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โœฆ Synopsis


Laser-excited emission spectra and decay curves of Cr3+ m gahnite-type glass-ceramics are compared with those in gahnite crystals. The nature of the CT'+ sates is determined from the positions of the emission and excitation peaks and from measurements of the decay times.


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Trivalent chromium in transparent glass-ceramics (73.6 SiOl: 11.8 Alz0,:4.2 Li,O:7.0 ZnO: 1.6 TiOz: 1.5 Zr02:0.3 AszOl: 0.024 Cr203 mole%) enters mainly the gahnite phase after an equilibrium has been reached. The intermediate phase during heat treatment is of virgilite-type Li,AlSi,\_,O,. This glas