42results about How to "Ensure thermal stability" patented technology

The invention provides a copper-based methanol synthesis catalyst and a preparation method thereof. The method comprises: mixing the copper-zinc mixed solution and the first precipitant aqueous solution in parallel, controlling the pH to be 7-8, and standing for aging to form a slurry A ; Add the second precipitant aqueous solution to the soluble aluminum salt aqueous solution, control the pH to 7-8, and the temperature to 40-50°C, leave it to age to obtain slurry B; mix slurry A and slurry B, filter, and pass through the solid phase Washing, drying, roasting, molding treatment, that is, the copper-based methanol synthesis catalyst is obtained. The above preparation method has simple steps, strong controllability, wide sources of raw materials, and easy industrialization. The preparation method of the present invention can obtain a copper-based methanol synthesis catalyst with high catalytic activity and thermal stability, which is suitable for the synthesis of methanol containing CO, CO2, H2 The synthesis gas can produce methanol under the condition of low temperature and low pressure, and the catalyst of the invention does not need to be reduced before use, which is convenient for large-scale popularization and application.

A magnetic recording medium in which information can be recorded using a heat-assisted magnetic recording method comprises a recording layer formed on a substrate. The recording layer has a plurality of magnetic recording bit regions and a plurality of high thermal conductors each extending inside a corresponding one of the bit regions. The high thermal conductors have a thermal conductivity higher than that of the recording layer and assist in dissipating heat energy imparted to the bit regions during the recording of information.

Embodiments of the invention provide a method and an apparatus for generating a total harmonic distortion reference signal. A triangle wave having a predetermined frequency and a predetermined amplitude is generated. The triangle wave is filtered to produce a signal substantially consisting of a sinusoid at the predetermined frequency and selected harmonics of predetermined amplitudes.

A secondary cell capable of ensuring thermal and mechanical stabilities required for a high-capacity cell with a simple structure is provided. The secondary cell includes: a can; and an electrode jelly-roll wound with two different electrodes and a separator interposed between the electrodes therein and accommodated in the can, the outer surface of the electrode jelly-roll being wound around one more turn with the separator. Only the separator is wound at the core of the electrode jelly-roll to form a rod-like stability member which is cured by absorbing heat generated from the cell. The separator wound at the core of the electrode jelly-roll is continuous from a portion of the separator which is stacked with the two different electrodes.

The invention discloses a SCR nanofilm denitration catalyst, and a preparation method and applications thereof. According to the preparation method, industrial-grade common ceramic with changeable flow morphology is taken as a nanofilm catalyst carrier; a nanoparticle is taken as an auxiliary carrier; a mixture obtained via combination of V2O5 with at least one ingredient selected from PdO, MnO2, and NiO is taken as an active component; CeO2 is taken as a catalytic active ingredient; WO3 is taken as an accessory ingredient; the carrier is subjected to cleaning and drying, and then is delivered into a reflux unit filled with ethidene diamine for surface modification; the auxiliary carrier is prepared into a solution, the modified carrier is added into the solution for pulling film forming; the film-formed carrier obtain via the former step is delivered into a vacuum drying oven so as to realize chemical bond connection of the carrier with the nanoparticle; an obtained product is delivered into a mixed solution of CeO2 and WO3 for pulling film forming; and at last the SCR nanofilm denitration catalyst is obtained via drying. The SCR nanofilm denitration catalyst can be used for removing nitrogen oxides generated in combustors; turbulent flow, rotational flow, and cross flow are caused when air flow is delivered through the SCR nanofilm denitration catalyst; catalyst surface utilization rate is increased by changing flow morphology of the air flow, and catalytic efficiency is increased.

The invention relates to a whole-body dry-pressed porcelain induction cooker heating panel material and a preparation method thereof. Parts by weight: blank: 30-60 parts of spodumene; 0-20 parts of cordierite; 0-20 parts of burnt gem; 0-20 parts of calcined kaolin; 10-30 parts of kaolin; 0-4 parts of minerals; 0.5-6 parts of colorants; panel colorants: 15-30 parts of spodumene; 20-30 parts of alumina; 0-5 parts of mineralizers; 30-60 parts of transition metal oxides; Panel glaze: 0-60 parts of spodumene; 0-70 parts of petalite; 0-10 parts of calcined zinc oxide; 0-10 parts of barium carbonate; 0-10 parts of calcite; 15-35 parts of fused quartz; kaolin 4 to 10 parts; 0 to 25 parts of frit; 0.5 to 6 parts of coloring material; panel coloring material is added to panel blank and panel glaze respectively according to the coloring requirements, and the addition amount is 0.5 to 6%, and the panel glaze is applied to the panel blank. form a layered structure.