The described embodiments relate generally to cosmetic surfaces and associated treatments to alter a color of cosmetic surfaces. According to one embodiment, cosmetic ink configured to be applied to a cosmetic surface can include a suspension matrix configured to suspend a number of small particles in the suspension matrix. Each of the small particles of the is within a desired overall diameter to cause a user to perceive a desired color due to plasmon resonance of the small particles.

Changing colors of materials

The present invention relates to novel technical ceramic bodies and a method for preparing these technical ceramic bodies. The method of the invention for the production of a coloured technical ceramic body comprises the following steps: providing a composition comprising alumina, at least one pigment component and optionally binder materials, preparing a green body from this composition, optionally debinding the green body, thereafter subjecting the green body to a treatment with a metal-containing preparation as a further pigment component, and sintering the treated green body. The coloured technical ceramic body of the present invention consists of alumina as a technical ceramic material, the technical ceramic body comprising a first coloured area and a second coloured area of a different colour, whereby the first coloured area contains a first pigment component, and the second coloured area contains a second pigment component in combination with the first pigment component.

Coloured technical ceramic bodies and method for preparing the same

The embodiments described herein relate to forming white appearing metal oxide films by forming cracks within the metal oxide films. In some embodiments, the methods involve directing a laser beam at a metal oxide film causing portions of the metal oxide film to melt, cool, contract, and crack. The cracks have irregular surfaces that can diffusely reflect visible light incident a top surface of the metal oxide film, thereby imparting a white appearance to the metal oxide film. In some embodiments, the cracks are formed beneath a top surface of a metal oxide film, thereby leaving a continuous and uninterrupted metal oxide film top surface.

Forming white metal oxide films by oxide structure modification or subsurface cracking

The invention relates to a refractory material that can withstand high temperatures in an oxidising medium, which contains at least: a first component which is hafnium or a non-oxide compound of hafnium, or a mix of at least two metals and/or compounds selected from hafnium or a non-oxide compound of hafnium; a second component which is boron or a non-oxide compound of boron, or a mix of boron and a non-oxide compound of boron; a third component which is a rare earth element (RE) or a non-oxide compound of the rare earth element (RE), or a mix of the rare earth element (RE) and a non-oxide compound of the rare earth element (RE), wherein RE is selected from among scandium, yttrium, and the lanthanides. The material does not contain any silicon or silicon compounds.

Materials and parts that can withstand high temperatures in an oxidizing medium, and method for manufacturing same

A range of processes is described herein for the preparation of a range of gold nanoparticle (Au NP) ceramic glazes with traditional firing methods that represents significant efficiency and ecological advancements over existing methods and allows for the replacement of commercial ceramic colorant methods, while retaining the costly equipment and firing methods already used. The process allows for ceramic surface color while breaking standards for minimal amounts of transition metal colorant used. The nanoparticle-based glazes described here add new colors to the known ceramic surface palette and offers greater consumer safety as an alternative to existing coloring processes that use higher concentrations of toxic metal and an increased risk of metal leaching from the final ceramic vessel into its contents (e.g., soil, beverage, food).

Gold Nanoparticle in Ceramic Glaze

The invention relates to a piece comprised in part or in full of a pigmented ceramic in which the pigment is comprised of nanoparticles based on a metal from column IB of the periodic table of the elements or of an alkaline metal, or an alloy of both, coated with a layer of silica, the silica being crystalline silica, particularly cristobalite or tridymite. The ceramic is preferably zirconia or alumina. The nanoparticle silica is crystallized, for example, by a thermal treatment in air or under inert gas at temperatures of between 900° C. and 1400° C. The piece is made by sintering a nanoparticle/ceramic mixture in air or under inert gas at temperatures of between 900° C. and 1250° C.

Pigmented ceramic piece

The component partially or wholly comprises pigmented ceramic. The pigment comprises nanoparticles of metal of group IB in periodic table, alkaline metals or their alloy, coated with a layer of silica such as crystalline silica. The crystalline silica is in cristobalite or tridymite form. The metal is gold or gold/silver alloy. The ceramic is zirconia and/or alumina, preferably zirconia. An independent claim is included for manufacture of components of timepiece and jewelry.

Pigmented ceramic element

The invention relates to nanoparticles based on a metal, on a metal alloy or on a metal derivative coated with a silica layer, in which the silica is crystalline silica, in particular crystalline silica in the cristobalite form. They may be prepared from nanoparticles based on amorphous silica by making the latter crystallize by a heat treatment in air or in an inert atmosphere at a temperature between 900 and 1400°C and they may be used as pigments for ceramics or in the biological field.

Nanoparticles with a silica-covered metal core

The invention relates to a piece comprised in part or in full of a pigmented ceramic in which the pigment is comprised of nanoparticles based on a metal from column IB of the periodic table of the elements or of an alkaline metal, or an alloy of both, coated with a layer of silica, the silica being crystalline silica, particularly cristobalite or tridymite. The ceramic is preferably zirconia or alumina. The nanoparticle silica is crystallized, for example, by a thermal treatment in air or under inert gas at temperatures of between 900 DEG C. and 1400 DEG C. The piece is made by sintering a nanoparticle/ceramic mixture in air or under inert gas at temperatures of between 900 DEG C. and 1250 DEG C.

Pigmented ceramic element and manufacturing method

L'invention concerne des nanoparticules a base d'un metal, d'un alliage ou d'un derive metallique revetu d'une couche de silice dans lesquelles la silice est de la silice cristalline, en particulier de la silice cristalline sous forme de cristobalite. Elles peuvent etre preparees a partir de nanoparticules a silice amorphe en faisant cristalliser celle-ci par une traitement thermique a l'air ou sous atmosphere inerte a une temperature comprise entre 900 et 1'400°C, et etre utilisees comme pigments pour ceramiques ou dans le domaine biologique.

Alke Fink-Petri

Papers

Pigmented ceramic piece

Pigmented ceramic element

Nanoparticles with a silica-covered metal core

Pigmented ceramic element and manufacturing method

Nanoparticules a noyau metallique recouvert de silice