摘要:
The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments. and organic dyes.
摘要:
The present invention provides a resin composition including aluminum oxide (A) containing molybdenum having a size on the order of µm or less and a resin (B); and a resin molded body formed by molding the resin composition. Also, the present invention provides a heat-dissipating material containing the resin composition; and a heat-dissipating member containing the resin molded body. The heat-dissipating member of the present invention can be used for electronic parts such as electronic devices, electric devices, OA devices or for LED illumination.
摘要:
An object of the present invention is to provide an inorganic oxide powder suitable for forming an inorganic oxide porous membrane, which is superior in lithium ion conductivity and has insulation performance, on at least one surface of a positive electrode, a negative electrode and a separator which constitute a lithium ion secondary battery. The present invention relates to an inorganic oxide powder for use in forming an inorganic oxide porous membrane having insulation performance on at least one surface of a positive electrode, a negative electrode and a separator which constitute a lithium ion secondary battery, wherein the powder has 1) an oxide purity of 90% by weight or higher, 2) an average particle diameter of 1 µm or less, and 3) an average three-dimensional particle unevenness of 3.0 or higher.
摘要:
The present invention provides a porous alumina self-supporting film which has a sufficient strength to be used as a self-supporting film, is flexible and has a high transparency; an alumina sol that is composed of fibrous or needle-like boehmite particles dispersed in a solution and that has a high storage stability; and methods for producing such a film and such an alumina sol. More specifically, the invention provides a porous alumina self-supporting film which is composed of a collection of fibrous or needle-like alumina hydrate particles or alumina particles having an average breadth of 1 to 10 nm, an average aspect ratio (length/breadth) of 30 to 5,000 and an average length of 100 to 10,000 nm, has an orientation, has a pore distribution with a pore diameter d peak of 0.5 to 20 nm, is flexible, has a high transparency, and has the ability to luminesce when excited by ultraviolet light; an alumina sol which has a Na, K and SO 4 content of 0 to 1 ppm, has an orientation when the particles are collected, and luminesces when excited by ultraviolet light after being fired at 250 to 900°C; and methods for producing such a film and such an alumina sol.
摘要:
Eine flammgeschützte Polymerzusammensetzung, besteht aus
a) 20 - 60 Gew.-% eines thermoplastischen und/oder vernetzten oder vernetzbaren und/oder elastomeren und extrudierbaren Polymeren und b) als Flammschutzmittel 40 - 80 Gew.-% entweder eines Aluminiumhydroxids mit den Stoffwerten
spezifische Oberfläche nach BET 3 - 5mg 2 /g mittlerer Korndurchmesser d 50 1,0 - 1,5 µm Restfeuchte 0,1 - 0,4 % Ölzahl 19-23 % Wasseraufnahme 0,4 - 0,6 ml/g
oder eines Aluminiumhydroxids mit den Stoffwerten
spezifische Oberfläche nach BET 5 - 8 m 2 /g mittlerer Korndurchmesser d 50 0,8 - 1,3 µm Restfeuchte 0,1 - 0,6 % Ölzahl 21 - 25 % Wasseraufnahme 0,6 - 0,8 ml/g
Ein Verfahren zur Herstellung eines Flammschutzmittels ist dadurch gekennzeichnet, dass ein durch Fällung und Filtration gewonnenes filterfeuchtes Aluminiumhydroxid mit einem mittleren Korndurchmesser von 0,8 - 1,5 µm in einem turbulenten Heißluftstrom einer Mahltrocknung derart unterzogen wird, dass unter weitgehender Beibehaltung der Kornverteilung die BET-Oberfläche um mindestens 20 % vergrößert wird.
摘要:
Nanoscale corundum powders are obtained by first producing an Al2O3 precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the Al2O3 precursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the Al2O3 precursor are separated off. The resulting product is calcinated at temperatures of 700 to 975 °C and any fines that may be present are removed. The resulting corundum powders can be sintered at temperatures ≤ 1200 °C to produce compacts or components of multiple layer systems.