Color centres and polymorphism in pure WO3 and mixed (1-x)WO3-y·xReO2 powders

E. Cazzanelli; G. Mariotto; C. Vinegoni; A. Kuzmin; J. Purans

doi:10.1007/BF02375997

Color centres and polymorphism in pure WO₃ and mixed (1-x)WO_3-y·xReO₂ powders

E. Cazzanelli^*
, G. Mariotto
, C. Vinegoni
, A. Kuzmin
, J. Purans

^*Šī darba korespondējošais autors

University of Calabria
University of Trento
University of Geneva

Zinātniskās darbības rezultāts: Devums žurnālam › Zinātniskais raksts (žurnālā) › koleģiāli recenzēts

9 Atsauces (Scopus)

Kopsavilkums

The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO₃ powders, acquiring less intense colour after mechanical treatments of variable duration. A comparative study on coloration is made also for mixed compounds (1-x)WO_3-y·xReO₂, where an evidence of a resonance effect for a particular Raman band at 970 cm ^-1, attributed to the color centres, is observed. Besides, it is found that even moderate milling treatments result in a quite different structural evolution of tungsten trioxide upon cooling.

Oriģinālvaloda	Angļu
Lapas (no-līdz)	335-344
Lapu skaits	10
Žurnāls	Ionics
Sējums	5
Izdevuma numurs	5-6
DOIs	https://doi.org/10.1007/BF02375997
Publikācijas statuss	Publicēts - sept. 1999

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10.1007/BF02375997

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abstract = "The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO3 powders, acquiring less intense colour after mechanical treatments of variable duration. A comparative study on coloration is made also for mixed compounds (1-x)WO3-y·xReO2, where an evidence of a resonance effect for a particular Raman band at 970 cm -1, attributed to the color centres, is observed. Besides, it is found that even moderate milling treatments result in a quite different structural evolution of tungsten trioxide upon cooling.",

author = "E. Cazzanelli and G. Mariotto and C. Vinegoni and A. Kuzmin and J. Purans",

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AU - Cazzanelli, E.

AU - Mariotto, G.

AU - Vinegoni, C.

AU - Kuzmin, A.

AU - Purans, J.

PY - 1999/9

Y1 - 1999/9

N2 - The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO3 powders, acquiring less intense colour after mechanical treatments of variable duration. A comparative study on coloration is made also for mixed compounds (1-x)WO3-y·xReO2, where an evidence of a resonance effect for a particular Raman band at 970 cm -1, attributed to the color centres, is observed. Besides, it is found that even moderate milling treatments result in a quite different structural evolution of tungsten trioxide upon cooling.

AB - The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO3 powders, acquiring less intense colour after mechanical treatments of variable duration. A comparative study on coloration is made also for mixed compounds (1-x)WO3-y·xReO2, where an evidence of a resonance effect for a particular Raman band at 970 cm -1, attributed to the color centres, is observed. Besides, it is found that even moderate milling treatments result in a quite different structural evolution of tungsten trioxide upon cooling.

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