inorganic pigments hydrotalcite precursors derivatives, process for their preparation and their use in decorating ceramic substrates.

摘要

inorganic pigments derived from hydrotalcite precursors, process for their preparation and their use in decorating ceramic substrates.; inorganic pigment derived from hydrotalcite precursors, process for their preparation and their use in decorating ceramic substrates. The hydrotalcite-like precursors have the general chemical formula [M {(II)} _ {1-n} M {(III)} _ {n} (OH) {2} 1] ^ {n +} [X {m} _ {n / m} {2} cdotkH_ O] wherein m represents {II} a divalent cation, m III {} represents a trivalent cation. X represents an anion, m represents the valency of the anion, k may have any greater or equal to 0 and n is between 0 and 1. According to the method reacting a homogeneous solution of soluble salts of the cations M {II} and {III} M with a solution of a soluble salt containing an anion X, for the hydrotalcite precursor and calcining at temperatures between 500 and 1500C.