A stable dispersion of exfoliated layer substances is prepared through interlayer exfoliation of a layered compound. A dispersion including quaternary ammonium ions (A) each having a total carbon atom number of 15 to 45 and one or two C.sub.10-20 alkyl groups, and an anionic surfactant (B) having an ammonium ion, wherein plate-like particles (C) having an average thickness of 0.7 to 40 nm, an average major-axis length of 100 to 600 nm, an average minor-axis length of 50 to 300 nm, and a ratio of average major-axis length to average minor-axis length of 1.0 to 10.0 are dispersed in a liquid medium, and the plate-like particles (C) in the dispersion have an average particle diameter of 10 to 600 nm as measured by dynamic light scattering, and a transparent substrate using the dispersion.

The disclosure relates to a conductive particle and a manufacturing method thereof, an adhesive and an application thereof. The conductive particle includes a core, a conductive carbon layer and a conductive polymer layer. The conductive carbon layer covers the core, and the conductive polymer layer is provided on the conductive carbon layer. The conductivity of the conductive particle is higher.

The invention pertains to the field of materials based on calcium carbonate and in particular to the use thereof as a filler in polymeric plastics. The invention provides a method for reducing the hygroscopicity of a material (M) comprising calcium carbonate by treatment with at least one homopolymer grinding assistant (P) which is neutralized in a particular way. The invention pertains also to a method for producing said material (M), which is then of reduced hygroscopicity.

A boron nitride powder includes boron nitride aggregated grains that are formed by aggregation of scaly hexagonal boron nitride primary particles, the boron nitride powder having the following characteristic properties (A) to (C): (A) the primary particles of the scaly hexagonal boron nitride have an average long side length of 1.5 μm or more and 3.5 μm or less and a standard deviation of 1.2 μm or less; (B) the boron nitride aggregated grains have a grain strength of 8.0 MPa or more at a cumulative breakdown rate of 63.2% and a grain strength of 4.5 MPa or more at a cumulative breakdown rate of 20.0%; and (C) the boron nitride powder has an average particle diameter of 20 μm or more and 100 μm or less. Also provided are a method for producing the same and a thermally conductive resin composition including the same.

The invention relates to a method for preparing an at least partially exfoliated clay. The present invention further relates to an at least partially exfoliated clay obtainable by such a method and to a suspension comprising such a clay, as well to the use of such an at least partially exfoliated clay and of a suspension comprising such an at least partially exfoliated clay. Furthermore, the present invention is also directed to a polymeric composition comprising an at least partially exfoliated clay and/or a suspension comprising an at least partially exfoliated clay.

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 disclosure relates to a method for mechanochemical preparation of an iron red pigment, which comprise steps: mixing a clay mineral, a soluble iron source and an alkali source in a mill for grinding to obtain a precursor, wherein the ratio of ball to material is controlled at 20-50, the grinding speed is 300-1200 rpm, and the grinding time is 30-360 min; and calcining the precursor at 500-900° C. for 30-120 min to obtain a high-performance iron oxide red/clay mineral hybrid pigment. The iron oxide red/clay mineral hybrid pigment has a bright and beautiful color, high-temperature and acid resistance, and can satisfy requirements for high-performance iron oxide red pigments in fields of paints, inks, ceramics, anti-corrosive coatings, etc. Furthermore the method is a simple process without waste that is environmentally friendly and suitable for industrialized production, thus it is expected to replace existing processes of iron oxide red pigments.

A method of producing glass-coated aluminum nitride particles which includes a first step of mixing, while applying a shearing force by a mechano-chemical method, a mixture of aluminum nitride particles, and a composition powder containing a glass component, a second step of heat treating the mixture at a temperature of the glass transition temperature of the glass component or more, and 2000° C. or less, and a third step of crushing the heat treated product.

The present invention aims to provide a method of producing a fine particulate inorganic oxide dispersion, which makes it possible to easily disperse a fine particulate inorganic oxide while reducing the amount of dispersant used. The present invention relates to a method of producing a fine particulate inorganic oxide dispersion, the method including mixing the following components (A) to (D): (A) at least one fine particulate inorganic oxide selected from the group consisting of zirconium oxide (ZrO.sub.2), titanium oxide (TiO.sub.2), and barium titanate (BaTiO.sub.3), (B) a dispersant, (C) an alkoxysilane compound, and (D) a solvent having the following Hansen solubility parameters: a hydrogen bonding component (dH) of 11 or less and a polar component (dP) of 4 or more; and wet grinding the resulting mixture.

Provided is a method for producing a composite material in which the dispersibility of an exfoliated layered substance in a resin or the like is improved and with which a synthetic resin having significantly improved properties, such as impact resistance, can be obtained. A method for producing a composite material including an exfoliated layered substance and a coating substance coating a surface of the exfoliated layered substance includes a disintegrating step of disintegrating secondary particles of an exfoliated layered substance in a solution containing a coating substance, or a method for producing a composite material including an exfoliated layered substance and a coating substance coating a surface of the exfoliated layered substance includes a disintegrating step of disintegrating secondary particles of an exfoliated layered substance in a solvent and a dissolving step of dissolving a coating substance in a dispersion containing the exfoliated layered substance that has been disintegrated.