68results about "Scandium oxides/hydroxides" patented technology

Disclosed are: a metal oxide film, which is formed by a coating method that is one of the methods for producing a metal oxide film, and which has a good balance between excellent transparency and high electrical conductivity, while having excellent film strength; and a method for producing the metal oxide film. Specifically disclosed is a method for producing a metal oxide film, which comprises: a coating step wherein a coating film is formed on a substrate using a metal oxide film-forming coating liquid that contains various organic metal compounds; a drying step wherein the coating film is changed into a dry coating film; and a heating step wherein an inorganic film is formed from the dry coating film. The method for producing a metal oxide film is characterized in that in the heating step, the dry coating film, which is mainly composed of the various organic metal compounds, is heated to a temperature at which at least mineralization of organic metal compound components occurs or higher in an oxygen-containing atmosphere at a temperature not higher than the temperature that is lower by 10 DEG C than the dew point, so that the organic components in the dry coating film are removed by thermal decomposition or combustion, or by thermal decomposition and combustion, thereby forming a metal oxide fine particle layer which is densely filled with metal oxide fine particles that are mainly composed of various metal oxides.

Powder of particles, more than 95% by number of said particles exhibiting a circularity greater than or equal to 0.85, wherein said powder contains more than 99.8% of a rare earth oxide and / or of hafnium oxide and / or of yttrium aluminium oxide, as percentage by weight relative to the oxides, and has: a median particle size D 50 of between 10 and 40 microns and a size dispersion index (D 90−D 10) / D 50 of less than 3; a percentage by number of particles having a size less than or equal to 5 μm which is less than 5%; an apparent-density dispersion index (P<50−P) / P of less than 0.2, the cumulative specific volume of the pores which have a radius of less than 1 μm being less than 10% of the apparent volume of the powder, in which the percentiles Dn of the powder are the particle sizes corresponding to the percentages, by number, of n %, on the curve of cumulative distribution of the particle size of the powder, the particle sizes being classified in increasing order, the density P<50 being the apparent density of the fraction of particles having a size less than or equal to D50, and the density P being the apparent density of the powder.

Provided is a method of manufacturing a metal oxide film to be formed through the following processes: a coating process of forming a coating film on a substrate by using a coating liquid for forming metal oxide film containing any of various organometallic compounds; a drying process of making the coating film into a dried coating film; and a heating process of forming an inorganic film from the dried coating film under an oxygen-containing atmosphere having a dew-point temperature equal to or lower than −10° C.

There are provided processes for preparing alumina. These processes can comprise leaching an aluminum-containing material with HCl so as to obtain a leachate comprising aluminum ions and a solid, and separating said solid from said leachate; reacting said leachate with HCl so as to obtain a liquid and a precipitate comprising said aluminum ions in the form of AlCl3, and separating said precipitate from said liquid; and heating said precipitate under conditions effective for converting AlCl3 into Al2O3 and optionally recovering gaseous HCl so-produced. These processes can also be used for preparing various other products such as hematite, MgO, silica and oxides of various metals, sulphates and chlorides of various metals, as well as rare earth elements, rare metals and aluminum.

A process for preparing a mesoporous material, e.g., transition metal oxide, sulfide, selenide or telluride, Lanthanide metal oxide, sulfide, selenide or telluride, a post-transition metal oxide, sulfide, selenide or telluride, and metalloid oxide, sulfide, selenide or telluride. The process comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic or lyotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to form the mesoporous material. A mesoporous material prepared by the above process. A method of controlling nano-sized wall crystallinity and mesoporosity in mesoporous materials. The method comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic or lyotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to control nano-sized wall crystallinity and mesoporosity in the mesoporous materials. Mesoporous materials and a method of tuning structural properties of mesoporous materials.

Powder of particles, more than 95% by number of said particles exhibiting a circularity greater than or equal to 0.85, wherein said powder contains more than 99.8% of a rare earth oxide and / or of hafnium oxide and / or of yttrium aluminum oxide, as percentage by weight relative to the oxides, and has: a median particle size D 50 of between 10 and 40 microns and a size dispersion index (D 90−D 10) / D 50 of less than 3; a percentage by number of particles having a size less than or equal to 5 μm which is less than 5%; an apparent-density dispersion index (P<50−P) / P of less than 0.2, the cumulative specific volume of the pores which have a radius of less than 1 μm being less than 10% of the apparent volume of the powder, in which the percentiles Dn of the powder are the particle sizes corresponding to the percentages, by number, of n %, on the curve of cumulative distribution of the particle size of the powder, the particle sizes being classified in increasing order, the density P<50 being the apparent density of the fraction of particles having a size less than or equal to D50, and the density P being the apparent density of the powder.