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Influence of the thermal treatment in the crystallization of NiWO4 and ZnWO4

de Oliveira, A. L. M. ; Ferreira, J. M. ; Silva, Márcia R. S. ; de Souza, Soraia C. ; Vieira, F. T. G. ; Longo, E. ; Souza, A. G. ; Santos, Iêda M. G.

Journal of thermal analysis and calorimetry, 2009-07, Vol.97 (1), p.167-172 [Periódico revisado por pares]

Dordrecht: Springer Netherlands

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Título:
Influence of the thermal treatment in the crystallization of NiWO4 and ZnWO4
Autor: de Oliveira, A. L. M. ; Ferreira, J. M. ; Silva, Márcia R. S. ; de Souza, Soraia C. ; Vieira, F. T. G. ; Longo, E. ; Souza, A. G. ; Santos, Iêda M. G.
Assuntos: Analytical Chemistry ; Calcination ; Calorimetry ; Carbon ; Chemistry ; Chemistry and Materials Science ; Crystallization ; Exact sciences and technology ; Inorganic Chemistry ; Inorganic chemistry and origins of life ; Measurement Science and Instrumentation ; Nickel ; Physical Chemistry ; Polymer Sciences ; Precursors ; Preparations and properties ; Salts ; Thermal analysis ; Zinc
É parte de: Journal of thermal analysis and calorimetry, 2009-07, Vol.97 (1), p.167-172
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: NiWO 4 and ZnWO 4 were synthesized by the polymeric precursor method at low temperatures with zinc or nickel carbonate as secondary phase. The materials were characterized by thermal analysis (TG/DTA), infrared spectroscopy, UV–Vis spectroscopy and X-ray diffraction. NiWO 4 was crystalline after calcination at 350 °C/12 h while ZnWO 4 only crystallized after calcination at 400 °C for 2 h. Thermal decomposition of the powder precursor of NiWO 4 heat treated for 12 h had one exothermic transition, while the precursor heat treated for 24 h had one more step between 600 and 800 °C with a small mass gain. Powder precursor of ZnWO 4 presented three exothermic transitions, with peak temperatures and mass losses higher than NiWO 4 has indicating that nickel made carbon elimination easier.
Editor: Dordrecht: Springer Netherlands
Idioma: Inglês

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Influence of the thermal treatment in the crystallization of NiWO4 and ZnWO4

de Oliveira, A. L. M. ; Ferreira, J. M. ; Silva, Márcia R. S. ; de Souza, Soraia C. ; Vieira, F. T. G. ; Longo, E. ; Souza, A. G. ; Santos, Iêda M. G.

Dordrecht: Springer Netherlands

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