A silica composite particle includes a silica particle and a compound in which a metal atom selected from the group consisting of Ti, Al, Zr, V, and Mg bonds to an organic group through oxygen, the silica particle being surface-treated with the compound. A coverage of a surface of the silica composite particle with the metal atom is 0.01 at % or more and 30 at % or less. When a binding energy peak of O1s in an oxide of the metal atom is assumed to be MO1s, a binding energy peak of O1s in SiO.sub.2 is assumed to be SO1s, and a binding energy peak of O1s in the silica composite particle is assumed to be MSO1s, the binding energy peaks being detected by X-ray photoelectron spectroscopy, the formula 0.000452X.sup.20.059117X+SO1s<MSOs(SO1sMO1s)/100X+SO1s is satisfied.

Provided are oxide composite particles to be mixed with a resin to obtain a resin composition having low viscosity, low dielectric constant, and low dielectric loss tangent. The oxide composite particles containing silica and an oxide of aluminum (a single oxide or a composite oxide, or both), in which the oxide composite particles contain 50% by mass or more of an ?-cristobalite crystal phase, less than 5% by mass of an ?-alumina crystal phase, and 10% by mass or less of a mullite crystal phase, and an elemental ratio of aluminum to silicon (aluminum/silicon) as determined by X-ray photoelectron spectroscopy is 0.01 to 5.0.

A method of making silica-layered double hydroxide microspheres having the formula I: (i) wherein, M.sup.z+ and M.sup.y+ are two different charged metal cations; z=1 or 2; y=3 or 4; 0<x<0.9; b is 0 to 10; c is 0 to 10; P>0, q>0, X.sup.n is an anion; with n>0 a=z(1x)+xy2; and the AMO-solvent is an 100% aqueous miscible organic solvent; comprises the steps: (a) contacting silica microspheres and a metal ion containing solution containing metal ions M.sup.z+ and M.sup.y+ in the presence of a base and an anion solution; (b) collecting the product; and (c) optionally treating the product with AMO-solvent and recovering the solvent treated material to obtain the silica-layered double hydroxide microspheres. Preferably, M in the formula I is Li, Mg, Ni or Ca. Preferably, M in formula I is Al. The invention further provides silica-layered double hydroxide microspheres having the formula I. The silica-layered double hydroxide microspheres may be used as catalysts and/or catalyst supports.

(SiO.sub.2).sub.p@{[M.sup.z+.sub.(1x)M.sup.y+.sub.x(OH).sub.2].sup.a+(X.sup.n).sub.a/n.bH.sub.2O.c(AMO-solvent)}.sub.q(I)

The present invention relates to, inter alia, a composition, a nanocomposite material, and a method for preparing the nanocomposite material. The nanocomposite material includes: a dielectric-silver nanocomposite material, the dielectric-silver nanocomposite material including a silver nanoparticle having a silver ion, and a dielectric material encapsulating the silver nanoparticle, where the silver ion chelates with a matrix of the dielectric material, and a surface plasmon band absorption of the dielectric-silver nanocomposite material lies outside a range of a visible region.

Aqueous dispersion containing a hydrophilic metal oxide powder comprising a metal oxide and a surface modification of the metal oxide, wherein a) the metal oxide is selected from the group consisting of TiO.sub.2, ZrO.sub.2, SiO.sub.2, Al.sub.2O.sub.3, Fe.sub.2O.sub.3, Fe.sub.3O.sub.4, Sb.sub.2O.sub.3, WO.sub.3, CeO.sub.2 and mixed oxides thereof and b) the surface modification b1) comprises silicon atoms and aluminum atoms and b2) the silicon atoms are at least partly bonded to a hydrocarbon radical via a C atom and b3) the Al/Si molar ratio of the surface modification is 1:2-1:20.

A composite material comprising at least one polymer matrix. The polymer matrix comprises at least one inorganic load composed of a biphasic material that comprises at least one mesoporous substrate at least partially coated with carbon nanotubes. The composite material is remarkable in that the mesoporous substrate is composed of diatoms.

The present invention provides a cost-efficient method for producing particles having a SiO.sub.2 containing surface wherein said method comprises a) providing an aqueous reaction composition comprising i) core particles, ii) an added base, iii) a silicate salt, and iv) a pH modulator wherein the pH value of the reaction composition is above the gelation pH value; b) agitating said reaction composition, wherein the pH modulator decreases the pH value of the reaction composition over time and wherein due to said decrease of the pH value of the reaction composition SiO.sub.2 is deposited onto the core particles, whereby particles are formed which have a diameter of 30 m or less; and c) obtaining the particles. Furthermore, silica particles having high nucleic acid binding properties are provided.

The present invention is generally directed to treated silica particulates for use in ink-jet media coatings, comprising silica particulates being surface-activated by a surface activating agent; the surface active agent including an aluminum chloride hydrate, and where the silica particulates are also reagent-modified by an organosilane reagent; the organosilane reagent including an amine-containing silane.

The present application discloses an eco-friendly long-lasting heat-sensitive paper, including a substrate layer, a base color layer, a heat-sensitive covering layer, and a protective layer that are arranged sequentially from bottom to top, where the heat-sensitive covering layer is prepared as follows: coating a heat-sensitive covering layer raw material on the base color layer, and oven-drying a resulting product, where the heat-sensitive covering layer raw material is an emulsion obtained by mixing an acrylic hollow microsphere with a host resin. In the present application, an acrylic hollow microsphere that can change from an opaque state to a transparent state after rupturing under heat is used as a heat-sensitive covering layer to cover a base color layer to obtain the heat-sensitive paper with heat-sensitive color development characteristics.

Compositions and methods for modifying and/or enhancing the fluorescence and/or radiance intensity, and single and multiple-emission wavelengths in an inorganic ceramic coating comprising quantum dots (QDs) are provided. The compositions of the disclosure include quantum dot-dope metal oxide particles, water, and an inorganic binder and are useful as highly fluorescent aqueous coatings, inks, and paints.