Disclosed in certain embodiments are polymer compositions comprising closed-cell metal oxide particles and methods of preparing the same. In at least one embodiment, a closed-cell metal oxide particle comprises a metal oxide matrix defining an array of closed-cells. Each closed-cell encapsulates a media-inaccessible void volume. The outer surface of the closed-cell metal oxide particle is defined by the array of closed-cells.

A porous plate-shaped filler is a plate shape having an aspect ratio of 3 or more, and has a minimum length of 0.1 to 50 m and a porosity of 20 to 90%. Furthermore, the porous plate-shaped filler 1 includes plate-shaped pores 2 having an aspect ratio of 1.5 or more. Consequently, in the porous plate-shaped filler, a thermal conductivity is low. The heat insulation film includes the porous plate-shaped filler, whereby a heat insulation effect of the heat insulation film can improve.

Copper oxide particles having particular starting size and surface area characteristics can be processed by heat and milling to achieve sizes and particle size distributions that give the copper oxide properties as an infrared reflective pigment without addition of other metals or oxides.

A filler for electronic material according to the present invention has a silica particle material produced by a dry method, wherein D50 is 0.2 m or greater and 7.0 m or less. Further, in the filler for electronic material according to the present invention, (BET specific surface area)/(theoretical specific surface area calculated from D50) is 0.85 or greater and 1.2 or less (requirement 1), and/or D10/D50 is 0.55 or greater and 0.75 or less (requirement 2). When at least one of the requirements 1 and 2 is satisfied, electric characteristics such as a Df value are improved. Here, the BET specific surface area is a value measured by using nitrogen, and D50 is a 50 mass % cumulative diameter, i.e., a median diameter, and means a particle diameter at 50 mass % when the masses of particles are sequentially integrated from smaller particle diameters. Similarly, D10 is a 10 mass % cumulative diameter.

The present invention refers to a process for producing white UV-absorbing surface-reacted calcium carbonate doped with a titanium species, comprising the steps of providing a calcium carbonate-comprising material, a calcium phosphate selected from monocalcium phosphate and/or dicalcium phosphate, and at least one titanium comprising substance, treating the calcium carbonate-comprising material with the calcium phosphate in an aqueous medium to form an aqueous suspension and grinding the aqueous suspension at a pH value of at least 4.2 to form an aqueous suspension of surface-reacted calcium carbonate, wherein the calcium carbonate-comprising material and the calcium phosphate in combination have a calcium ion to phosphate ion molar ratio (Ca.sup.2+:PO.sub.4.sup.3) in the range from 1.75:1 to 100:1, and wherein the at least one titanium comprising substance is added before and/or during and/or after the treatment step and/or before and/or during the grinding step.

In a zinc oxide powder, a BET specific surface area is equal to or more than 1.5 m.sup.2/g and less than 8 m.sup.2/g, an apparent specific volume by a loose packing method is equal to or more than 0.8 mL/g and equal to or less than 4.0 mL/g, and a value (the apparent specific volume by the loose packing method/an apparent specific volume by a tapping method) obtained by dividing the apparent specific volume (mL/g) by the loose packing method by the apparent specific volume (mL/g) by the tapping method, is equal to or more than 1.50 and equal to or less than 2.50.

The present invention aims to provide spherical particles satisfying the requirements concerning hydrochloric acid-soluble matter and soluble barium salt described in the standard of Barium sulfate in The Japanese Standards of Quasi-Drug Ingredients 2021. The present invention relates to spherical composite particles of barium sulfate and silica with the following features: when the spherical composite particles are subjected to a purity test concerning hydrochloric acid-soluble matter and soluble barium salt described in the standard of Barium sulfate in The Japanese Standards of Quasi-Drug Ingredients 2021, the spherical composite particles contain a hydrochloric acid-soluble matter in an amount of 15 mg or less, and a test liquid used in the test concerning soluble barium salt has an absorbance of less than 0.03.

A material for producing macromolecule air fibers, a preparation method, and an application thereof are provided. The material for producing macromolecule air fiber is prepared by preparation of doped antibacterial TiO.sub.2/ZnO/ZrO.sub.2 ceramic powder, deposition of magnetic iron oxide, surface modification with tannic acid, addition of water-soluble chitosan solution, immersion in a spined TPEE air fiber membrane, uniform addition of Genipin solution, heating and reacting, membrane removal, washing, and drying. The TPEE air fiber membrane produced by the present disclosure has good mechanical properties, and modified ceramic powder is uniformly dispersed in the TPEE air fiber membrane, which plays a good role in antibacterial, environmental protection, immune regulation, magnetic therapy, far-infrared heating and other effects, rendering the material for producing macromolecule air fibers have better comprehensive performance and a good mattress support material with broad application prospects.

The present invention provides an alumina particle containing molybdenum (Mo) and an inorganic coating part provided on the surface of the alumina particle.

Disclosed are a method for producing a composite talc powder material and a housing thereof. The method for producing a composite talc powder material includes the following steps. firstly, evenly mixing a talc powder material, a bio-powder material and a solvent to produce a mixed solution; subsequently, filtering the mixed solution to obtain a mixed powder material; then drying the mixed powder material to obtain a dry powder material; next sintering the dry powder material to produce a sinter cake material; and then pulverizing and grinding the sinter cake material to obtain the composite talc powder material. Besides, the disclosure provides a housing manufactured by using the composite talc powder material.