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Time-resolved and temperature-dependent spectra of chromium(III) in glasses and spinel-type glass-ceramics

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


Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
260 KB
Volume
121
Category
Article
ISSN
0009-2614

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โœฆ Synopsis


Time-resohrd spectroscopy or Cr'+-doprd glasses or spmel-lype glass ceram~cz ulth limruum and lllamum-zmzomum as nuclca~ng agent. allows us 10 dwmgt.nsh the long-hved 'E and short-hved 'T2 sIa[es Temperalure dependence and ume resolulion permll us lo locale the varrous energy levels and presence or aggregnres of Cr'+ m these syswms


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Laser spectroscopy of chromium(III) in m
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Laser excitation at different wavelengths was carried out on Cr'+-doped transparent glass-ceramics of composition (mole%) Ac(58.7S10Z, 16.7A120,, 17.8MgO,6.7T10~,0.03Cr~O,)andBc(49.1 SiOz, 19.7Alz0,,21.9Mg0,6.0TiO~,3.2Zr0,,0.03 Cr201), and in synthetic crystals of composition MgA120, (CT'+ ), Mg,TiO

Transparent glass-ceramics doped with Cr
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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

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Spectroscopy and EPR of chromium(III) in
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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