55results about How to "Avoid high temperature sintering" patented technology

The invention relates to the technical field of electronic packaging and discloses a metal heat-conducting substrate and a manufacturing method thereof. An insulating medium slurry layer is printed on a metal substrate and molten by a laser ablation method to form an insulating medium layer, and a metal circuit slurry layer is printed on the insulating medium layer and molten by the laser ablation method to form a metal circuit layer, so that a well-insulated radiating passage is provided. The laser melting method has the advantages of achieving extremely high pattern accuracy, contributing to product miniaturization and precision, simplifying the technology of a manufacturing process, preventing pollution, saving materials, lowering cost and achieving good radiating effect.

The invention discloses a method for deoxidizing a low-concentration oxygen-containing coal bed gas. The method comprises the following steps: preheating a fixed bed deoxidization reactor; feeding the oxygen-containing coal bed gas into the reactor after penetrating through a flame arrester, a preheater and a preheater bypass; carrying out deoxidization reaction when the reaction temperature is 350-650 DEG C, the operation pressure is 0-0.4MPa and the gaseous hourly space velocity is 2,000-20,000h<-1>; feeding a hot deoxidized coal bed gas into the preheater and exchanging heat with a cold oxygen-containing coal bed gas; and feeding the cooled oxygen-containing coal bed gas into a cooler, cooling and dewatering, and feeding to a coal bed gas delivery pipeline. The method has the advantages of being good in safety, good in deoxidization effect, low in investment, convenient to operate and low in operation cost.

The invention discloses a high-temperature-resistant methanation catalyst which is prepared from an active component, a carrier, a first additive and a second additive, wherein the active component is nickel, the carrier is a SiO2 / Al2O3 composite carrier, the first additive is La2O3 and the second additive is the mixture of one or two of Mg oxide and Ca oxide. The invention further discloses a preparation method of the high-temperature-resistant methanation catalyst. The preparation method comprises the steps that nickel nitrate, aluminum nitrate, tetramethoxysilane, lanthanum nitrate, magnesium nitrate and calcium nitrate are dissolved in ethyl alcohol to obtain a solution I; oxalic acid and a dispersing agent are dissolved in ethyl alcohol to obtain a solution II; the solution II is slowly dropwise added into the solution I to be evaporated and dried after solvent ethyl alcohol is removed, the product is soaked with deionized water, filter, dried, pelletized and roasted, graphite is added, tabletting is carried out, and the high-temperature-resistant methanation catalyst is obtained. The high-temperature-resistant methanation catalyst is high in specific surface area and activity.