96 results about "Double oxide" patented technology

In a composite material having a construction that on the surface of a substrate is formed a primer layer having an appropriate function, and a photocatalyst layer is laminated on the primer layer, decreasing of the durability of the film due to the existence of the primer layer is prevented. Primer layer 14, photocatalyst layer 16, and hydrophilic layer 18 are laminated on one surface of transparent glass substrate 12 in this order. Primer layer 18, which makes up for suppressing sodium dispersion, is composed of a mixture or double oxide comprising an inorganic oxide such as SiO2 and Al2O3, and lanthanoide oxide such as La, Ce, and Pr, or of Ta2O5 or ZrO2. Photocatalyst layer 16 comprises, e.g., the photocatalyst, TiO2. Hydrophilic layer 18 comprises, e.g., porous SiO2.

A paste to be fired at a temperature lower than melting point of silver for forming a circuit board comprising surface-modified silver powder consisting essentially of metal silver particles having an average particle size of not more than 10 mum and at least one member selected from the group consisting of oxides and double oxides containing at least one metal element selected from the group consisting of those belonging to Groups 2 to 14 of Periodic Table whose atomic number falls within the range of from 12 to 82, which is adhered to the surface of the individual metal silver particles. The surface-modified silver powder has an elevated sintering-initiation temperature and a reduced rate of heat shrinkage due to sintering. Therefore, the surface-modified silver powder is particularly suitable for use in making a circuit board, in particular an LTCC circuit board.

Provided is a sphere-shaped coated magnesium oxide powder having a surface coated with a double oxide and having an average shape factor of 1.25 or less, wherein the powder is advantageous not only in that it has excellent humidity resistance, but also in that it has excellent filling property and excellent flowability when being used as filler for a resin. In addition, provided is a method for producing a sphere-shaped coated magnesium oxide powder, wherein the method comprises allowing a compound of an element forming a double oxide to be present on the surface of magnesium oxide powder, and then fusing the resultant magnesium oxide powder at a high temperature so that the surface of the magnesium oxide powder is coated with the double oxide and the magnesium oxide powder is shaped into sphere. Further, provided are a resin composition comprising the sphere-shaped coated magnesium oxide powder and an electronic device using the resin composition.

The invention provides a double-oxide co-coated high-nickel lithium battery positive electrode material and a preparation method thereof. A high-nickel ternary precursor material is prepared through aco-precipitation method; and then, vacuum pre-sintering is carried out after fully mixing and ball-milling with lithium hydroxide and calcium hydroxide; later, sulfate, metal oxide titanium oxide, cerium oxide and the like are added into gel synthesized in an organic solvent; and the high-nickel lithium battery positive electrode material coated by a double-oxide layer is obtained after sintering. According to the method in the invention, the problem that the alkali content of the traditional high-nickel ternary material is excessively high in the precursor preparation process is solved; theprepared double-oxide-layer coated high-nickel lithium battery positive electrode material forms a physical isolation layer, so that the corrosion of HF in the electrolyte and the generation of side reactions are inhibited, the high-nickel lithium battery positive electrode material is protected; therefore, the cycling performance of the battery is improved; meanwhile, the introduced sulfate ionsform a stable electrolyte layer, so that the decomposition of the electrolyte is inhibited, and the cycling performance of the battery is further improved.

A paste to be fired at a temperature lower than melting point of silver for forming a circuit board comprising surface-modified silver powder consisting essentially of metal silver particles having an average particle size of not more than 10 mum and at least one member selected from the group consisting of oxides and double oxides containing at least one metal element selected from the group consisting of those belonging to Groups 2 to 14 of Periodic Table whose atomic number falls within the range of from 12 to 82, which is adhered to the surface of the individual metal silver particles. The surface-modified silver powder has an elevated sintering-initiation temperature and a reduced rate of heat shrinkage due to sintering. Therefore, the surface-modified silver powder is particularly suitable for use in making a circuit board, in particular an LTCC circuit board.

The invention provides a nanometer composite fiber membrane and a preparation method thereof and relates to the technical field of compounding. The preparation method comprises: dissolving a water-soluble divalent metal salt and a water-soluble trivalent metal salt in water, then adding a precipitating agent into the solution to obtain a metal salt mixed solution, immersing a polymer nanofiber membrane in the metal salt mixed solution to obtain a mixture, heating the mixture, carrying out washing and drying to obtain a layered double oxide-loading nanofiber membrane, mixing the nanofiber membrane and an imidazole solution, and heating the mixture for a reaction to obtain the nanometer composite fiber membrane loading MOF particles. The nanometer composite fiber membrane realizes effectiveadhesion of MOF particles on the nanofibers. The preparation method has simple processes, realizes a low cost, prevents pollution and has a wide application prospect.

The drive of direct-heat-supply type reforming of hydrocarbon at ordinary temperature is necessary in order to realize a self-sustaining, on-site reforming type fuel cell system which does not necessitate the supply of energy from the outside. According to the invention, an oxide, CeO2 or Pr6O11, or a Ce / Zr or Ce / Zr / Y double oxide is used as the oxide containing a rare earth element capable of changing the oxidation number with an active metal and oxygen defects are introduced into the oxide or double oxide by activating the oxide or double oxide with a reducing gas at high temperature. When a reaction gas containing hydrocarbon and oxygen is passed though the catalyst at low temperature, the oxygen defects react with oxygen and thereby return to the original oxide. Since this return reaction is an exothermic reaction, the catalyst itself is heated, which acts as the driving force for advancing the combustion of the hydrocarbon, whereby the catalyst layer is further heated and the reforming is advanced to from hydrogen. Thus, the hydrogen-producing reaction can be driven even at low temperature, particularly ordinary temperature.

A thermal spraying powder includes granulated and sintered particles of an yttrium-aluminum double oxide obtained by granulating and sintering a raw powder containing yttrium and aluminum. The total volume of fine pores having a diameter of 6 μm or less in one gram of the granulated and sintered particles is 0.06 to 0.25 cm3. The thermal spraying powder reliably forms a thermal spray coating that is suitable for use where the thermal spray coating is subjected to a thermal shock in a corrosive atmosphere or an oxidative atmosphere and for use where the thermal spray coating is subjected to a thermal shock in a state where the thermal spray coating contacts a member that has reactivity to a base material.

Using as a negative thermal expansion material a double oxide containing at least partly a compound represented by the chemical formula: RQ,O, (wherein R is Zr, Hf or a tetravalent metallic element represented by a mixture system of these, and Q is a hexavalent metallic element selected from W and Mo), and using as a positive thermal expansion material a material containing at least partly a compound represented by the chemical formula: MQX, (wherein M is Mg, Ca, Sr, Ba, Ra or a divalent metallic element represented by a mixture system of any of these, Q is a hexavalent metallic element selected from W and Mo, and X is an element selected from O and S), these are mixed preferably in a weight ratio of 1:1 and are synthesized to obtain a material whose coefficient of thermal expansion is substantially zero over a wide temperature range, i.e., a zero thermal expansion material. Using this zero thermal expansion material, high-precision and high-performance practical component parts can be obtained.