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Production and conversion of color centers in OH−-doped KCl polycrystals colored electrolytically

✍ Scribed by Fen Wang; Hongen Gu; Fang Qin; Jia Liu; Weiwei Chen

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
276 KB
Volume
405
Category
Article
ISSN
0921-4526

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✦ Synopsis

OH À -doped KCl polycrystals are colored electrolytically by using a pointed cathode and a flat anode at various temperatures and voltages. Characteristic O À , OH À , U, U A and Cu + absorption peaks are observed in resolved absorption spectra of uncolored polycrystals. Characteristic V 2 , V 3 , Cu + , O 2 À -V þ a , I À 2 , I 2 , H 2 O À and F spectral bands are observed at room temperature in Kubelka-Munk functions of colored polycrystals. Current-time curve for electrolytic coloration of an OH À -doped KCl polycrystal and its relationship with electrolytic coloration process are given. Production and conversion of color centers are explained.

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