摘要:
The present invention relates to methods for the preparation of electrodes for use in solid oxide fuel cells. More specifically, the present invention relates to methods for the preparation of ceramic electrodes that provide high ionic and electronic conduction, high porosity and high surface area. Additionally, the methods of the invention allow for controlled and optimized properties of ionic and electronic phases for a particular operating condition. Advantageously, the methods of the invention allow for the fabrication of SOFC electrodes using low processing temperatures and inexpensive techniques requiring no specialized equipment.
摘要:
A method for producing a fuel cell, including applying a porous, non-densified electrolyte layer over an anode substrate, sintering the electrolyte layer to the anode substrate, and applying a porous catalytic anode layer onto the electrolyte and spaced from the anode layer to define a fuel cell to produce a non-gastight fuel cell. Typically, the fuel cell is annealed and substantially porous.
摘要:
A method of extracting electrochemical energy from flowing hydrocarbon fluids, including positioning a porous electrolyte layer between a substantially porous anode layer and a substantially porous cathode layer to define a fuel cell, flowing a mixture of hydrocarbon fuel and oxidant over the fuel cell, heating the fuel cell to at least a predetermined minimum temperature, and extracting electrochemical energy from fuel cell. The electrolyte is typically an ionic or protonic conductor.
摘要:
The present invention provides methods for the preparation of ceramic materials. Using the methods of the present invention, a porous ceramic material is impregnated with a metal-organic polymer and then treated with heat to decompose the polymer. Advantageously, the heat treatment may be performed at low temperature. The methods of the invention can be used to increase the density of a porous ceramic material or to change its composition. The methods are particularly useful for the formation of ceramic products in the form of films, coatings and layers in multilayer ceramic systems.
摘要:
A method of measuring the dielectric constant of a powder, including selecting a powder having an unknown first dielectric constant, selecting a liquid having a known second dielectric constant, and introducing a predetermined amount of powder into a predetermined volume of liquid to define a slurry characterized by a known volume fraction of powder. Next, the impedance spectra of the slurry is plotted over a predetermined frequency range, the measured dielectric constant data is read and the appropriate equivalent circuit for the slurry is determined. Appropriate equivalent circuit equations are applied to the measured dielectric constant data and the first dielectric constant is calculated from the appropriate equivalent circuit equations, known volume fraction of powder and measured dielectric constant data.
摘要:
An adaptive projector system for headlights of motor vehicles is disclosed, the system consists of a reflector with a light source, a lens (6) and a diaphragm system with fixed screening diaphragms, and with a movable approximately hyperboloid diaphragm cap, which rotates along with the shaft of a motor, on which it is firmly overhung, and by its controlled stopping in certain positions, it creates the desired light beams.
摘要:
A method of measuring the dielectric constant of a powder, including selecting a powder having an unknown first dielectric constant, selecting a liquid having a known second dielectric constant, and introducing a predetermined amount of powder into a predetermined volume of liquid to define a slurry characterized by a known volume fraction of powder. Next, the impedance spectra of the slurry is plotted over a predetermined frequency range, the measured dielectric constant data is read and the appropriate equivalent circuit for the slurry is determined. Appropriate equivalent circuit equations are applied to the measured dielectric constant data and the first dielectric constant is calculated from the appropriate equivalent circuit equations, known volume fraction of powder and measured dielectric constant data.
摘要:
An iterative process of depositing on a solid electrolyte a coating of unconnected particles composed of an ionically conductive material. A liquid solution is also applied. The liquid solution includes an inorganic component. The deposited liquid is heated to a temperature sufficient to evaporate or otherwise remove some or all of the volatile components of the liquid solution. Typically the temperature is below 1000° and often at about 850° C. The effect of heating the solution is to cause ion conducting material in the solution to adhere to the surface of the existing ion conducting particles and form connections between these particles. This is understood to create an ion conducting skeletal support structure. Within the intrestices of this skeletal support structure, the step of heating is also understood to result in the deposition of the inorganic component that will begin to form a electron conducting structure. The process of applying the liquid solution and heating may be repeated until a sufficiently thick layer of material is laid over the solid electrolyte to provide the composite electrode structure desired.
摘要:
A composition is derived from an addition polymerizable organotitanium polymer which upon exposure to an oxygen plasma or baking in air, is converted to titanium dioxide (titania) or is converted to a mixed, titanium-containing metal oxide. The metal oxide formed in situ imparts etch-resistant action to a patterned photoresist layer. The composition may also be directly deposited and patterned into permanent metal oxide device features by a photolithographic process.