5 results about "Oxygen donor" patented technology

The invention provides a method for preparing stable aluminum titanate coated carbon black pigment C (at) Al2TiO5 through a composite non-aqueous precipitation method and application, and belongs to the technical field of preparation of inorganic composite materials. The method comprises the following steps: mixing an aluminum source, a titanium source, a stabilizer and an oxygen donor, adding a composite solvent, carrying out a non-aqueous polycondensation reaction, adding carbon black, and carrying out desolvation treatment and heat treatment to obtain the stable aluminum titanate coated carbon black pigment C (at) Al2TiO5. The method is simple in operation process, the related raw materials are easy to obtain, powder particles with high crystallinity can be synthesized, the preparation period is short, the reaction temperature is low, and the method is suitable for large-scale production. The stable aluminum titanate coated carbon black pigment product prepared by the method is excellent in color generation performance, good in chemical stability, good in high temperature resistance and corrosion resistance, and suitable for the fields of high-temperature corrosion-resistant and weather-resistant coatings, electronic packaging or functional fillers and the like.

A wafer fixing device and an annealing method using the same, at least comprising: a quartz boat; a fixing frame arranged above the quartz boat and capable of being clamped with the wafer when the wafer is vertically arranged in the quartz boat, so that all the wafers are placed in the placement space formed between the quartz boat and the fixing frame without shaking. The fixing frame is hollowed out and arranged at the upper end surface of the wafer, and the fixing frame and the underlying quartz boat jointly improve the stability of wafer placement, prevent wafer shaking, and reduce the probability of wafer breakage. Meanwhile, a guide plate for guiding flow is arranged on both sides of each wafer, which can further improve the fixation of the wafer, make the cold air flow into the guide warehouse formed by the guide plate, accelerate the cooling speed and the uniformity of cooling, further reduce the generation of oxygen donors, and improve the accuracy of resistivity measurement. The annealing time is saved, the energy is saved, and the production cost is reduced.

The invention relates to a method for operating a fuel cell system (1), in which a fuel cell stack (2) of the fuel cell system (1) is supplied on the anode side with a gaseous fuel, in particular hydrogen, and on the cathode side with air as an oxygen donor, before the fuel cell system (1) is shut down, the following steps are carried out: a) determining at least one parameter within the fuel cell system (1) and comparing the at least one parameter with at least one predefined first limit value; the invention relates to a method for operating a fuel cell system (1), comprising the steps of: a) determining a first limit value, b) if the first limit value is below, activating at least one means for releasing thermal energy at key points and / or components (3, 4) within the fuel cell system (1), c) starting a drying procedure, and a control device (10) for a fuel cell system (1).

The invention relates to the technical field of electrode catalytic materials, in particular to a preparation method for precisely constructing a transition-rare earth bimetallic monatomic material based on a confinement strategy of a soft-hard acid-base theory and application of the transition-rare earth bimetallic monatomic material in a lithium-oxygen battery. The preparation method comprises the following steps: S1, selecting transition metal salt, rare earth metal salt, an organic ligand of an oxygen-containing donor and a nitrogen-containing donor; s2, preparing a heteronuclear metal complex; s3, in-situ confinement encapsulation of the complex; and S4, performing high-temperature pyrolysis to form the diatomic catalyst. According to the method disclosed by the invention, molecular pre-constraint under the guidance of a soft-hard acid-base theory is creatively combined with a space confinement effect of ZIF-8, so that the core technical problems of precise pairing of metal atoms and structural stability at a high temperature in synthesis of the heteronuclear diatomic catalyst are successfully solved, and precise, controllable and macro-quantity preparation of heteronuclear diatomic sites such as Co-Gd and the like is realized.

This invention discloses a method for preparing high-purity copper salt from analytical grade copper salt, belonging to the field of high-purity inorganic chemical preparation and fine purification technology. The method includes the following steps: (1) preparing a high-concentration stock solution; (2) fractional dilution treatment; (3) selective adsorption treatment; (4) fractional recrystallization; and (5) washing and drying treatment. This invention prepares high-purity copper salt with a total metal impurity content of less than 20 ppm and a purity higher than 99.99% through selective complexation-adsorption with an oxygen donor-containing adsorbent material and fractional recrystallization. This invention is applicable to the preparation of high-purity copper sulfate, copper chloride, copper nitrate, and other products.