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Synthesis Mechanism of an Iron–Chromium Ceramic Pigment
Author(s) -
Escardino Agustín,
Mestre Sergio,
Barba Antonio,
Beltrán Vicente,
Blasco Antonio
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01143.x
Subject(s) - chromium , chemical engineering , ceramic , pigment , materials science , phase (matter) , mechanism (biology) , chemistry , mineralogy , metallurgy , organic chemistry , philosophy , epistemology , engineering
The synthesis of a black Fe 2 O 3 –Cr 2 O 3 pigment has been studied to better understand the synthesis mechanism. A mechanism is proposed according to which, under the tested operating conditions, one of the starting constituents (Cr 2 O 3 ) is transferred, largely in a gas phase (after subliming), to the particle surface of the other constituent (Fe 2 O 3 ), at which it is deposited or chemisorbed, forming a layer from which it diffuses inward into the Fe 2 O 3 particles. The process stops when the composition of the resulting solid solution has become uniform.