Preferred Label : aggregate;
Detailed label : aggregate in catalysis;
IUPAC definition : Certain materials used as catalysts or supports consist of spheroids smaller than
10 nm in diameter, cemented into larger entities. A primary particle should be defined
as the smallest discrete identifiable entity and the method of identification should
be mentioned (e.g. transmission electron microscopy, scanning electron microscopy).
An assemblage of such primary particles exhibiting an identifiable collective behaviour
(e.g. chemical nature of the aggregated primary particles, texture of the aggregate,
resistance to mechanical separation upon grinding) constitutes an aggregate. When
describing the aggregates the criterion of identification should be mentioned. Strongly
bonded aggregates are called agglomerates.;
Origin ID : A00184;
Automatic exact mappings (from CISMeF team)
- See also
Certain materials used as catalysts or supports consist of spheroids smaller than
10 nm in diameter, cemented into larger entities. A primary particle should be defined
as the smallest discrete identifiable entity and the method of identification should
be mentioned (e.g. transmission electron microscopy, scanning electron microscopy).
An assemblage of such primary particles exhibiting an identifiable collective behaviour
(e.g. chemical nature of the aggregated primary particles, texture of the aggregate,
resistance to mechanical separation upon grinding) constitutes an aggregate. When
describing the aggregates the criterion of identification should be mentioned. Strongly
bonded aggregates are called agglomerates.
