Binary cyclo-tetraphosphates (Co<subscript>2−x</subscript>Ca<subscript>x</subscript>P<subscript>4</subscript>O<subscript>12</subscript>) as special pigments
In: Journal of Materials Science, Jg. 25 (1990-04-21), Heft 4, S. 2159-2164
Online
serialPeriodical
Zugriff:
The cyclo-tetraphosphates of the type Co 2-x Ca x P 4 O 12 , where x=0 to 1, have been synthesized as new binary compounds, and their existence has been proved. The synthesis is based on a thermal procedure making use of the reversible transformation of cyclo-tetraphosphates to higher linear phosphates. Temperatures and heats of formation of these products have been determined (i.e. formation by thermal recrystallization from higher linear phosphates) along with the yields of this procedure which increase with increasingx (the calcium content). The structure of the binary cyclo-tetraphosphates belongs to the monoclinic system (over the whole range ofx); the structural parameters determined usually increase with increasing calcium content. With respect to the proposed application of these products as special inorganic pigments, the following properties have been determined experimentally: density, thermal stability, colour hue and the anticorrosion activity.
Titel: |
Binary cyclo-tetraphosphates (Co<subscript>2−x</subscript>Ca<subscript>x</subscript>P<subscript>4</subscript>O<subscript>12</subscript>) as special pigments
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Autor/in / Beteiligte Person: | Trojan, M. |
Link: | |
Zeitschrift: | Journal of Materials Science, Jg. 25 (1990-04-21), Heft 4, S. 2159-2164 |
Veröffentlichung: | 1990 |
Medientyp: | serialPeriodical |
ISSN: | 0022-2461 (print) ; 1573-4803 (print) |
DOI: | 10.1007/BF01045782 |
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