Phase separation and crystal precipitation in supercooled sulphophosphate ionic melts

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Reibstein S, Da N, Simon JP, Spiecker E, Wondraczek L
Zeitschrift: Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B
Verlag: Society of Glass Technology
Jahr der Veröffentlichung: 2012
Band: 53
Heftnummer: 3
Seitenbereich: 61-67
ISSN: 1753-3562


Abstract


Sulphophosphate melts of the type SO3-P2O5-EO-A(2)O (E={Zn2+, Ca2+, Sr2+, Ba2+, Mg2+, Mn2+}; A={Li+, Na+, K+}) enable fabrication of surprisingly stable ionic glasses. Depending on the P/S ratio, their structure may be characterized by chemical heterogeneity on short length scales, where different cations cluster in the vicinity of different anions. To evaluate the topological origin and the kinetics of phase separation and crystallisation, in situ small angle x-ray scattering, transmission electron microscopy, laboratory x-ray diffraction and calorimetric analyses were employed. Volume crystallisation occurs in a two-step process of microscopic phase separation and diffusion-controlled two-dimensional growth of sulphate phases. The crystallisation mechanism depends largely on SO3 content and appears to be directly related to the topological heterogeneity of the precursor melt.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Wondraczek, Lothar Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Glas und Keramik)


Zusätzliche Organisationseinheit(en)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


Zitierweisen

APA:
Reibstein, S., Da, N., Simon, J.-P., Spiecker, E., & Wondraczek, L. (2012). Phase separation and crystal precipitation in supercooled sulphophosphate ionic melts. Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B, 53(3), 61-67.

MLA:
Reibstein, S., et al. "Phase separation and crystal precipitation in supercooled sulphophosphate ionic melts." Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B 53.3 (2012): 61-67.

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Zuletzt aktualisiert 2018-01-09 um 07:08