44results about How to "Thermally matched well" patented technology

A method and system for generating power from low- and mid-temperature heat sources using a zeotropic mixture as a working fluid. The zeotropic mixture working fluid is compressed to pressures above critical and heated to a supercritical state. The zeotropic mixture working fluid is then expanded to extract power. The zeotropic mixture working fluid is then condensed, subcooled, and collected for recirculation and recompression.

The invention discloses an antioxidant composite protective layer for a high-temperature film sensor and a manufacturing method of the antioxidant composite protective layer, and belongs to the technical field of film sensors. The antioxidant composite protective layer sequentially comprises a BN insulation layer, a ZrB2-based composite ceramic layer and a Al2O3 covering layer from bottom to top, wherein the BN insulation layer, the ZrB2-based composite ceramic layer and the Al2O3 covering layer are sequentially deposited on a sensitive function layer of the film sensor in the way of evaporation or sputtering or the like. By means of the antioxidant composite protective layer for the high-temperature film sensor, the antioxidant protective requirements of the aero-engine high-temperature film sensor at the high temperature of 1000-1700 DEG C can be met, the stability and reliability of the film sensor in high-temperature high-pressure severe environment are effectively improved, and the service life of the film sensor in high-temperature high-pressure severe environment is effectively prolonged.

The invention provides a U-shaped heating element of a silicon tetrachloride hydrogenation furnace and a manufacturing process thereof. The U-shaped heating element of the silicon tetrachloride hydrogenation furnace consists of a green body, a matrix and a silicon carbide surface coating, wherein, the green body is prepared from 2D (two-dimensional) carbon fiber laminated fabric or quasi-3D (three-dimensional) carbon fiber needle felt with the weight not less than 50% of the total weight of the product; the matrix is composed of impregnated carbon and CVD-based (chemical vapor deposition) carbon, wherein, the content of the CVD-based carbon is not more than 30% of the total weight of the green body and the matrix; the material density of the heating element is higher than or equal to 1.3g/cm3; and the thickness of the silicon carbide surface coating is 10 to 100 mum. The U-shaped heating element of the silicon tetrachloride hydrogenation furnace has the advantages of high corrosion and erosion resistance, long service life and high reliability.

The invention provides an integrated light-emitting Micro LED chip and a manufacturing method thereof, which belong to the field of semiconductor optoelectronic technologies. A buffer layer, an unintentionally doped GaN layer and an n-type doped GaN layer epitaxially grow on the same side of a substrate. First and second blue light electroluminescence structure layers and a green light electroluminescence structure layer are etched laterally at intervals by depositing an insulating dielectric mask layer twice, and corresponding light-emitting structure layers are manufactured in correspondingly formed etching areas. Blue light emitted by the second blue light electroluminescence structure layer is converted into red light by a red light photoluminescence conversion layer. According to theinvention, GaN-based blue and green electroluminescence and red light photoluminescence technologies are integrated to produce red, green and blue three-primary-colour MicroLED LED light-emitting units; red, green and blue three-primary-colour light-emitting units are laterally deposited on the n-type doped GaN layer at intervals and are connected through the n-type doped GaN layer.

The invention relates to a heat sink material and a preparation method thereof, and in particular relates to an AlN-particle-reinforced copper composite heat sink material and a preparation method thereof. The invention aims to solve the technical problems that the existing AlN-particle-reinforced copper composite heat sink material has complex preparation process and high cost. The composite heat sink material is prepared from a rare earth compound, AlN particles and electrolytic copper, wherein the rare earth compound is Y2O3 powder. The method comprises the following steps: performing ball milling to the rare earth compound, AlN particles, electrolytic copper and stearic acid, then prepressing to obtain a preform, preburning the preform, and then roasting at 900-1300 DEG C to obtain the AlN-particle-reinforced copper composite heat sink material. The heat conductivity of the material is more than 200w/mK, the compactness is more than 98% and the thermal expansion coefficient is no more than 14ppm/K; and the heat sink material can be used in electronic packaging.

An anode for an X-ray tube includes at least one thermally conductive anode segment in contact with a rigid support member and cooling means arranged to cool the anode. The anode may further include a plurality of anode segments aligned end to end, each in contact with the support member.

The present disclosure provides a rotary friction welding process including: providing an outer axisymmetric workpiece having a front first annular weld surface at a radially inward extent and a rear first annular weld surface at a radially inward extent; providing a front inner axisymmetric workpiece, the front inner workpiece having a front second annular weld surface at a radially outward extent of the front inner workpiece; providing a rear inner axisymmetric workpiece, the rear inner workpiece having a rear second annular weld surface at a radially outward extent of the rear inner workpiece; and rotary welding the workpieces together.

The invention provides an organic rankine cycle power generation system. An evaporation device is internally provided with a first heat exchanger and a second heat exchanger which are connected through a first circulating pipeline, and the first circulating pipeline is internally provided with a first duplex fluid working medium which contains first liquid metal and a first organic working medium.Meanwhile, a condensing device is provided with a third heat exchanger and a fourth heat exchanger which are connected through a second circulating pipeline, and the second circulating pipeline is internally provided with a second duplex fluid working medium which contains second liquid metal and a second organic working medium. Due to the high heat conductivity of the liquid metal in the two duplex fluid working media, heat can be rapidly dispersed, the heat releasing efficiency of a heat source medium, the heat absorbing efficiency of a cold source medium and the heat absorbing efficiency and the heat releasing efficiency of the organic working media in an organic rankine cycle pipeline are improved, meanwhile, by means of latent heat of phase change of the organic working media contained in the duplex fluid working media, much heat can be stored, higher efficient heat transmission and better heat matching of the working media on the two sides of the heat exchanger are achieved, andtherefore the power generation system efficiency is improved as a whole.

The invention relates to the technical field of high-temperature stealth coatings, and particularly discloses a functional gradient distribution high-temperature radar and infrared compatible stealth coating and a preparation method thereof. The surface of a metal base material is coated with the high-temperature radar and infrared compatible stealth coating, and from the surface of the metal base material, the coating sequentially comprises a metal bonding layer, a thermal matching ceramic layer, a dielectric ceramic layer, a first high-temperature electromagnetic periodic structure layer, a dielectric isolation layer, a second high-temperature electromagnetic periodic structure layer and an infrared stealth layer from bottom to top. The high-temperature radar and infrared compatible stealth coating disclosed by the invention has radar and infrared compatible stealth functions, adopts a multifunctional layer structure, realizes gradient distribution of thermal expansion coefficients of the coating, can realize better thermal matching with a metal substrate, and is good in thermal shock resistance; and the softening point temperature of the selected glass phase does not exceed 600 DEG C, so the coating has the advantages of low sintering temperature and short sintering time, and can reduce the influence of oxidation, damage, deformation and the like on the metal substrate.

The present invention includes a catalyst having a layered structure with, (1) a porous support, (2) a buffer layer, (3) an interfacial layer, and optionally (4) a catalyst layer. The invention also provides a process in which a reactant is converted to a product by passing through a reaction chamber containing the catalyst.

A rotary friction welding process is provided, including: providing a first axisymmetric workpiece having a first annular weld surface, and a second axisymmetric workpiece having a second annular weld surface; and rotationally welding the workpeices. On the longitudinal section through the aligned workpieces, each of the first and second annular weld surfaces is flanked by radially inner and outer side surfaces, the first weld surface and its side surfaces being shaped to thermally match the second weld surface and its side surfaces across a line of initial contact of the first and second weld surfaces such the heat flows from the weld at all the side surfaces are substantially equal.