The present invention is directed to a method for manufacturing a bismuth vanadate pigment having an improved alkaline resistance, the method comprising: i) obtaining a dried bismuth vanadate pigment; ii) encapsulation of the bismuth vanadate pigment using a functionalized silane of the general formula RSi(OR)3 wherein R is an alkyl group; and R is a methyl or ethyl group; iii) final processing of the encapsulated pigment; and v) drying of the pigment.

In addition, the present invention is directed to a bismuth vanadate pigment encapsulated with a functionalized silane of the general formula RSi(OR)3 wherein R is an alkyl group; and R is a methyl or ethyl group.

The invention relates to a particle with a core-shell structure, the core of which comprises at least one thermochromic semiconductor and the shell comprises at least two layersan inner layer in contact with the core and comprising a mineral material or an organo-mineral hybrid material; andan outer layer comprising a mineral material or an organo-mineral hybrid material, different from that of the inner layer. The invention also relates to a method for producing this particle, and the use thereof as a temperature indicator, in particular in a culinary article, such as a pan.

A carbon-coated vanadium dioxide particle includes a vanadium dioxide particle; and a coating layer containing amorphous carbon on a surface of the vanadium dioxide particle, the amorphous carbon being derived from carbon contained in an oxazine resin, and having a peak intensity ratio of a G band to a band of 1.5 or greater as determined from a Raman spectrum. The coating layer has an average thickness of 50 nm or less. The coating layer has a coefficient of variation (CV value) of thickness of 7% or less.

A heat storage particle that includes a ceramic particle containing a vanadium oxide as a main component thereof, and a metal film covering the ceramic particle.

A composite particle of the present invention includes an inorganic particle and a graphene oxide particle that coats at least a part of the inorganic particle, and the graphene oxide particle is a modified graphene oxide particle having a surface modified with a hydrocarbon group optionally having a substituent.

The present invention is directed to a method for manufacturing a bismuth based pigment having an improved alkaline resistance, the method comprising: i) obtaining a dried bismuth based pigment; ii) encapsulation of the bismuth based pigment using a chelating agent; iii) final processing of the encapsulated pigment; and v) drying of the pigment. In addition, the present invention is directed to a bismuth based pigment encapsulated by a layer of chelating agent.

The present disclosure relates to a method for preparation of a high temperature-resistant bismuth yellow pigment. The method comprises: mixing an oxide which served as a matrix and dopan with a bismuth source, a vanadium source, or a molybdenum source, and then placing the mixture into a mill for grinding to obtain a precursor; further calcining and crushing the precursor to obtain the high temperature-resistant bismuth yellow pigment powder. The bismuth yellow pigment has a bright color, a b* value greater than 90, a stable performance, and a high heat-resistance above 800? C. The method is environmentally friendly without waste, and reaction conditions are simple. Doping of BiVO.sub.4 crystal lattices by incorporation of oxides can be achieved, so that the particle size and distribution of the bismuth yellow pigment can be effectively controlled while the color performance of the bismuth yellow pigment is greatly improved.

The present invention is directed to a coated bismuth oxy halide-based pigment having a coating comprising an anti-oxidant, said antioxidant is being a phenol based, a phosphite or phosphonate based, or a thioether based stabilizer, and the coating comprising an inner coating and an outer coating, wherein the outer coating comprises the antioxidant, and wherein the inner coating comprises a first layer consisting of one or more salts, or one or more oxides, heteropolyacids, organic acids, sulphites, sulfides, sulfates, phosphates, pyrophosphates, polyphosphates, hydrates, carbonates, or a combination thereof, selected from the group of alkali-earth metals, metals, non-metals, transition metals or lanthanides. Further, the present invention is directed to a composition comprising a paint, a lacquer, an ink, a cosmetic, a resin, a plastisol or a polymer formulation, and such pigment. In addition, the present invention is directed to a method for manufacturing a coated bismuth oxy halide-based pigment, said method comprising the steps of:providing a dispersion of a bismuth oxy halide-based pigment,adding a dispersion of an antioxidant,mixing and drying.

A composition can exhibit improved ion resistance and color stability. The composition includes a pigment made of bismuth vanadate (BiVO.sub.4). The pigment is in the form of particles coated with at least one O-functionalized carbohydrate, where the O-functionalized carbohydrate is at least one of an ether of a carbohydrate and an ester of a carbohydrate. The carbohydrate is at least one of a monosaccharide and an oligosaccharide. The oligosaccharide is at least one of an oligosaccharide having two to ten monosaccharides, a sugar alcohol, a sugar acid, and a lactone of the sugar acid.

Coated mesoflower are described including: a metallic mesoflower core having a first surface and including at least one protrusion terminating in a tip; a non-metallic coating covering and substantially conformal to the first surface, thereby creating an outer surface of the coated mesoflower; and a marker material having an optical property that is enhanced in the presence of the coated mesoflower. Coated hollow mesoflowers that do not have the metallic mesoflower core are also described.