C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 3/20 (2006.01) C08K 3/10 (2006.01) C09C 1/34 (2006.01) C09C 3/06 (2006.01) C09D 7/12 (2006.01)
Patent
CA 2347886
The present invention provides new solid solutions having a corundum-hematite crystalline structure which are useful as inorganic color pigments. Solid solutions according to the present invention include a host component having a corundum-hematite crystalline structure which contains as guest components one or more elements from the group consisting of aluminium, antimony, bismuth, boron, chrome, cobalt, gallium, indium, iron, lanthanum, lithium, magnesium, manganese, molybdenum, neodymium, nickel, niobium, silicon, tin, titanium, vanadium, and zinc. Solid solutions according to the present invention are formed by thoroughly mixing compounds, usually metal oxides or precursors thereof, which contain the host and guest components and then calcining the compounds to form the solid solutions having the corundum-hematite crystalline structure. Some of the new solid solutions according to the present invention exhibit relatively low Y CIE tri-stimulus values and relatively high near infrared reflectance.
L'invention concerne de nouvelles solutions solides de structure cristalline corindon-hématite, qui servent de pigments de couleur inorganiques. Les solutions solides selon l'invention comprennent un composant hôte de structure cristalline corindon-hématite, qui contient, en tant que composants occupants, un ou plusieurs éléments sélectionnés dans le groupe composé d'aluminium, d'antimoine, de bismuth, de bore, de chrome, de cobalt, de gallium, d'indium, de fer, de lanthane, de lithium, de magnésium, de manganèse, de molybdène, de néodyme, de nickel, de niobium, de silicium, d'étain, de titane, de vanadium, et de zinc. Les solutions solides de l'invention sont formées par mélange homogène de composants, généralement des oxydes métalliques ou des précurseurs de ces derniers, qui contiennent les composants hôtes et occupants, puis par calcination des composants, de sorte que ces solutions solides présentent une structure cristalline corindon-hématite. Certaines des nouvelles solutions solides selon l'invention présentent des valeurs Y trichromatiques CIE relativement basses et une réflectance dans le proche infrarouge relativement élevée.
Blonski Robert P.
Pipoly Richard A.
Sliwinski Terrence R.
Ferro Corporation
Moffat & Co.
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