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Nucleation and crystallization of WO3 from pure and Pb2+ doped NaF fluxes (1997)

Pelly, I. ; Dieguez, E. ; Watts, B. E. ; [et al.]

Springer

Journal of thermal analysis and calorimetry 50 (1997), S. 157-166

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ISSN: 1572-8943

Keywords: nucleation and crystallization of WO3 ; WO3

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract DTA runs and flux growth experiments have shown that the crystallization temperatures of WO3 from NaF flux are in the range of 1020–1090°C. Addition of Pb2+ influences the crystal growth and the crystallization temperatures are altered (within this range). A thermal effect giving rise to an exothermal DTA peak was observed above the crystallization temperature. This peak occurs at a higher temperature when lead ions are present. We propose an explanation based on pre-crystallization clustering and on the number of nucleation sites on the surface of the platinum crucible.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01979558

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