30results about How to "High temperature conductivity" patented technology

A method of preparing small wafers for compatibility with conventional large wafer fabrication equipment comprising the following steps: indenting a face of a large wafer to form an array of depressions thereon, each depression sized to matingly accept a lower portion of a small wafer; applying a bonding medium to an exterior side of the depressions on the indented face of the large wafer; matingly fitting the small wafers into the depressions so that the small wafers are positioned in an array on the large wafer; and, removing the top portion of the small wafers standing out of the depressions by chemical mechanical polishing so that the remaining portions of the small wafers then have a uniform thickness generally equal to the depth of the indentations in the large wafer. A preferred aspect of this invention provides for a method as above wherein the small wafer is SiC and the large wafer is made from an amorphous substance which comprises SiC or aluminum nitride.

The invention relates to a doped crosslinking chemical stable ion exchange membrane, which belongs to the field of functional polymer composite materials. The doped crosslinking chemical stable ion exchange membrane is a perfluorinated ion exchange membrane which is formed by taking perfluorinated ion exchange resin with crosslinking sites as film-forming resin and simultaneously doping an inorganic substance with a water holding function or a proton conduction assisting function and a substance with a function of eliminating free radicals into the film-forming resin, so the chemical stability of the improved ion exchange membrane is greatly improved.

The present invention relates to a composite ion-exchange membrane that can exhibit good conductivity at high temperatures, methods to produce the polymer membrane, membrane-electrode assemblies that comprise one or more of such polymers, and polymer electrolyte fuel cells that comprise one or more of such electrode assemblies.

The invention discloses a novel ZnO-based thermoelectric thin film and a preparation method thereof. The novel ZnO-based thermoelectric thin film is a ZnO thermoelectric thin film codoped by Al and Ti, the chemical formula of which is Zn(1-x-y)AlxTiyO (X is greater than or equal to 0.005 and less than or equal to 0.04 and y is greater than or equal to 0.005 and less than or equal to 0.04). Ti is introduced on the basis of the Al-doped ZnO thermoelectric thin film to be used as a second doping element. The conductivity of the thermoelectric thin film codoped by Al and Ti is remarkably improved. In addition, as Ti is introduced, the effective state density of the thermoelectric thin film is improved, so that the high temperature seebeck coefficient is also further improved. According to the invention solves, the problem that the conductivity and the seebeck coefficient of the thermoelectric thin film cannot be improved at the same time are solved. The novel Zn(1-x-y)AlxTiyO thermoelectric thin film both has great high temperature conductivity and seebeck coefficient, so that the thermoelectric thin film has a good power factor. The novel Zn(1-x-y)AlxTiyO thermoelectric thin film disclosed by the invention has an excellent thermoelectric performance and has a wide application prospect in the high temperature thermoelectric field.

The invention provides an anode of a high-temperature solid-state fuel cell. The anode adopts the structure that nickel or/and a nickel compound is replaced by a ceramic high-temperature conductive material, on one hand, the ceramic high-temperature conductive material does not change structurally along with the oxidation-reduction reaction of the cell to avoid performance reduction caused by structural damage of the cell, on the other hand, the ceramic high-temperature conductive material can separate nickel particles microcosmically to inhibit growth of the nickel particles, so as to facilitate performance stability improvement of the cell, and prolong the service life of the cell. Besides, for a cell stack unit comprising the anode, the cathode active layer, the cathode buffer layer, and/or the connecting part protective layer of the cell stack unit also comprise(s) the ceramic high-temperature conductive material, so as to further improve the conductivity of the cell stack unit.

The invention relates to a doped and crosslinked multilayer perfluorinated ionic membrane and a preparation method thereof, and belongs to the field of functional polymer composite materials. The fluoride-containing ion exchange membrane has a multilayer structure. The fluoride-containing ion exchange resin serves as a membrane-forming resin; proton conduction assisting materials and highvalent metallic compounds are added therein at the same time to perform a crosslinking reaction under a certain condition so as to form the doped ion exchange membrane having a network structure. The ion exchange membrane prepared by the method of the invention has the advantages of higher proton conductivity, size stability, and chemical stability, particularly extremely excellent gas-permeation resistant performance.

The invention discloses siliceous refractory mortar with excellent high-temperature performance. Powder of the siliceous refractory mortar is prepared by mixing 20-50% of waste silicon brick powder with the particle size of 0.5-0 mm, 15-35% of quartz powder with the particle size of 0.3-0 mm, 25-45% of quartz powder with the particle size of 0.088-0 mm, 1-3% of silicon carbide dust extraction powder, 1-3% of silica micropowder, 1-1.5% of dextrin, 0.1-0.5% of carboxymethyl cellulose, 0.05%-0.2% of a mineralizing agent, and adding water accounting for 27-30 wt% of the powder by mass. The silicondioxide content of the siliceous refractory mortar provided by the invention is greater than or equal to 94%, raw clay, sodium bentonite and the like are not added, the content of aluminum oxide is low, the content of low melt is low, and the refractoriness under load is high. And meanwhile, the waste silicon brick powder is added, so that secondary utilization of resources is realized, and the waste silicon brick powder basically exists in a phosphorus quartz phase, is good in volume stability, is matched with the built silicon brick material, is good in adhesion in a high-temperature use environment, and does not fall off from the surface.

The invention belongs to the field of functional polymer composite materials and particularly relates to a fluorine-containing ion exchange membrane for a fuel cell and a preparation method of the fluorine-containing ion exchange membrane. According to the fluorine-containing ion exchange membrane for the fuel cell, film-forming resin of the membrane has a perfluorinated main chain; a side chain contains multiple functional groups, wherein at least one functional group has an ion exchange function; the membrane contains transition metal elements with a free radical elimination effect; and the transition metal elements and the functional groups on the side chain form a complex bond. Through a hydrogen bond and electrostatic interaction among the functional groups on the side chain of the film-forming resin, the high-temperature conductivity and the elasticity modulus of a proton exchange membrane are improved and the H2 transmittance is reduced. In addition, the functional groups have complexing action, and functional groups and transition metal ions with the free radical elimination effect form a complex, thereby preventing losses of these functional materials in the whole process.

The invention belongs to the technical field of industrial equipment, and relates to a composite pipe, in particular to a corrosion-resistant heat-tracing sampling composite pipe and a preparation method thereof. The corrosion-resistant heat-tracing sampling composite pipe is technically characterized by comprising a sampling pipe, a heat tracing band, a thermal insulation layer, a reinforcing layer and a protective layer. A heat tracing groove is cut in the outer part of the sampling pipe and is used for winding the heat tracing band on the sampling pipe; the heat tracing band is a constant-power heat tracing band; the outer layer of the heat tracing band is made of a basalt fiber/carbon fiber composite material; and the thermal insulation layer is arranged outside the sampling pipe, the reinforcing layer is wound outside the thermal insulation layer, and the protective layer is arranged outside the thermal insulation layer. According to the corrosion-resistant heat-tracing sampling composite pipe and the preparation method thereof, by adopting the heat tracing groove, the contact area of the heat tracing band and the sampling pipe is increased, the temperature conduction capacity is improved, the heat loss of the heat tracing band is reduced, on the other hand, the sampling pipe can be protected through the heat tracing band, and the high temperature resistance and the corrosion resistance of the sampling pipe are improved.

The invention discloses a CeO2-doped Cu/Mn composite film/microcrystalline interface layer and metal matrix composite connector and a preparation method thereof, and relates to the field of solid oxide fuel cell metal connector composite materials. Firstly, a microcrystalline transition layer of a matrix material is deposed through a high-energy micro-arc alloy technology; then, a composite film plated with metal Cu and combined with nanoscale CeO2 particles is compounded through an electrochemical deposition method; and then metal Mn is electrochemically deposited to serve as an outer layer of the whole composite material, wherein a certain amount of nanoscale CeO2 is added during electrodeposition of a Cu plating layer to refine grains of the plating layer, so that the high-temperature diffusivity of elements and the high-temperature oxidation resistance of a composite layer are improved. The CeO2-doped Cu/Mn composite film/microcrystalline interface layer and metal matrix composite connector and the preparation method thereof have the beneficial effects that the prepared microcrystalline interface layer and metal matrix composite connector is high in conductivity and excellent in high-temperature oxidation resistance, and can effectively prevent the Cr element in the metal base material from diffusing outwards, so that the service life of the solid oxide fuel cell metal connector is prolonged, and the working efficiency of the solid oxide fuel cell metal connector is improved.

The invention discloses an automobile exhaust gas and resident coal/carbon burning waste gas purification system. The system comprises a gas cleaning device and a pollution exhaust gas discharge-freequicklime production process method, wherein the gas cleaning device comprises an air guiding tube, a pipeline supercharger, an exhaust gas/waste gas cleaning tank, a stirrer, a cleaning liquid, a sensor and a control circuit. The exhaust gas cleaning device is mounted on the top of an automobile or on the roof of a residential building, one end of the gas guiding tube is connected with the exhaust tube of the automobile or the chimney of the residential building, the other end of the gas guiding tube is connected with the cleaning tank, a plurality of cleaning tubes are arranged in the cleaning tank, and the automobile exhaust gas or the waste gas is conveyed to the bottom of the cleaning tank through the cleaning tubes overcoming the pressure of the cleaning liquid in order to complete the cleaning of the automobile exhaust waste and the waste gas, so the system achieves the effect of automobile emission reduction and provides a long-acting treatment method for urban air treatment.