84results about "Cryogenics" patented technology

The application describes a machine tool adapted and arranged to carry out removal and addition of material on a work piece located in a work station, the machine having a first head arranged to remove material from the work piece and at least a second head arranged to process the work piece, each of the first and second heads being arranged to be moveable in at least two axes and preferably in 3, 4 or 5 axes and wherein the machine is arranged to control an environment of the work station. The work station is at least partially sealable. The machine has a clean side and a dirty side. Novel processing heads particularly adapted for use in the new machine tool are disclosed. These may also be retrofitted to CNC machines. The novel heads include heads adapted to carry out two processes simultaneously. Heads adapted to carry out heat and pressure treatment are also disclosed. Use of the processing heads to carry out analysis in manufacturing steps is disclosed as is the provision and use of heads that can carry out analysis as well as processing.

The invention relates to a high-entropy alloy aerogel material with a dielectric near-zero characteristic as well as a preparation method and application of the high-entropy alloy aerogel material. The high-entropy alloy aerogel material is a three-dimensional porous structure material prepared from Cu, Co, Ni, Ag and Bi metal salts through a freeze thawing method. Compared with the prior art, the high-entropy alloy aerogel material prepared by the preparation method disclosed by the invention realizes the dielectric near-zero characteristic near the radio frequency of 10.3 MHz, also has higher charge transfer efficiency, and has important significance in the design aspect of radio frequency electronic devices.

The invention belongs to the technical field of renewable resource utilization and new energy, and relates to a wood-based water photovoltaic power generation material and a preparation method and application thereof.The wood-based water photovoltaic power generation material is prepared by taking natural wood as a raw material, performing chemical modification treatment and combining directional freeze drying and salting-out treatment. The wood-based water photovoltaic power generation material with relatively good mechanical strength is prepared by using the wood-based material as a raw material, the wood-based material has a highly-oriented porous structure, and under the conditions of 25 DEG C, standard atmospheric pressure and relative air humidity RH 30%, a 200-mesh copper mesh is used as an electrode, and the open-circuit voltage of a nano power generation device obtained by assembling in deionized water reaches 110 mV, and the short-circuit circuit reaches 0.74 mA. The material is simple in preparation process and wide in application scene, adopts natural high polymer materials as raw materials, has the environment-friendly advantages of reproducibility and biodegradability, and has a wide application prospect in the field of new energy materials.

An attenuator or dissipating element arranged to thermalize radio frequency or lower frequency signals, respectively, comprises: at least a first heat sink and a second heat sink (230, 231, 232, 233) that are capacitively grounded and arranged to provide heat dissipation via electron-phonon coupling; and at least one tunnel junction (220, 221, 222, 223, 224) coupled to the first heat sink and the second heat sink; wherein a combined resistance of the at least one tunnel junction and a heat sink coupled to it is below h / e 2; and / or a total capacitance of the first heat sink and the second heat sink, respectively, is above e 2 / 2 k b T, wherein h is the Planck constant, e is the elementary charge, k b is the Boltzmann constant, and T is the minimum operating temperature of the element. Preferably, an array (200) of N rows (204) and M columns (202) of non-superconducting metal-insulator-metal tunnel junctions is employed.

The invention relates to an installation for measuring a temperature of an external wall of a pipeline, the device comprising: a pipeline configured to allow the circulation of a fluid; a device for converting heat into thermoelectricity, configured to generate a potential difference when there is a temperature difference between an external wall of the pipeline and the ambient air; an electronic circuit electrically connected to the device for converting heat into thermoelectricity, being configured to extract electrical energy from the potential difference and being configured to measure the temperature of the external wall of the pipeline.

The invention relates to the technical field of wood, in particular to an insulating laminated wood continuous hot press molding process which comprises the following steps: pretreatment: peeling and cutting a wood raw material; according to the method, in the preparation process of the soaking solution, treated modified glass wool and fluorine-containing groups with low surface energy on the surface can be filled in pores of wood after being soaked, moisture invasion is prevented, the influence of moisture on the electrical insulation performance is reduced, meanwhile, the glass wool has certain insulativity, and the electrical insulation performance of the wood is improved. After the aluminum hydroxide and the epoxy resin are mixed and subjected to crosslinking reaction treatment, chemical bond connection is formed between molecular chains of the epoxy resin, a three-dimensional network structure is constructed, movement of electrons can be effectively limited, migration paths of the electrons in the material are reduced, and therefore the electrical insulation performance of the composite insulation additive is improved; and in the subsequent steps, the materials can be uniformly distributed in the wood, so that the insulating capacity of the wood is enhanced.

This invention relates to the field of wood processing technology, and provides a novel method for preparing slicing from the decay and softening of extra-hardwood. The method includes the following steps: immersing a wood sample in a water-filled container, first applying a vacuum, then depressurizing and maintaining the pressure for a period of time to allow liquid water to penetrate the wood cell cavities; heating the immersed sample and applying a vacuum again to cause the liquid water to boil and vaporize; extracting the sample after the bursting treatment with cold and hot water sequentially to remove extractives from the wood and reduce its decay resistance; adjusting the moisture content; treating the sample with brown rot fungi to cause decay and softening on the axial surface of the sample; soaking the sample in water and then freezing it until it is solid, followed by slicing. This invention can successfully produce slicings of extra-hardwood, providing a strong theoretical foundation and technical means for studying the structure of extra-hardwood, predicting its physical and mechanical properties, and improving its high-value-added processing and utilization.

Metal-foam mesh structures are used in a variety of applications where flexible mesh structures are utilized, such as steam chamber wicks and various diaphragms and energy electrodes. The new metal-foam mesh hybrid material has a three-dimensionally connected microporous structure and has improved mechanical properties, including good strength, ductility, flexibility, and other properties.

The invention relates to a process for producing Fe-Cr-Ni austenitic steel reinforced by an oxide dispersion, said process comprising the following steps: a) supplying (100) Fe-Cr-Ni austenitic steel powder; b) carrying out (200) a grinding, called cryogenic grinding, of the Fe-Cr-Ni austenitic steel powder at a temperature between -50°C and -196°C; c) supplying (300) an oxide powder; d) carrying out (400) a co-grinding of the Fe-Cr-Ni austenitic steel powder with the oxide powder thus supplied to obtain Fe-Cr-Ni austenitic steel powder reinforced by an oxide dispersion; and e) producing (500) the Fe-Cr-Ni austenitic steel reinforced by an oxide dispersion from the powder thus produced.

A high temperature superconductor (HTS) cable includes at least one HTS tape stack extending along a length of the HTS cable and at least one optical fiber extending along the HTS cable, the at least one optical fiber having a plurality of gratings spaced apart from one another along a length of the HTS cable for detecting quenches of the at least one HTS tape stack.

The application discloses a preparation method of formaldehyde-free low-carbon wood composite material, which comprises the following steps: preparing an impregnation solution, removing lignin on wood by using an alkaline solution to obtain a wood matrix; pretreating the obtained wood matrix by using a gas phase treatment process to control and adjust the pores on the wood matrix; cyclically freezing and impregnating the wood matrix by using the impregnation solution; heating the wood matrix after the S3 treatment; and ultraviolet curing, so that the voids on the wood after the lignin is removed are more uniform, the impregnation of the impregnation solution in the later impregnation process is easier, the situation that all areas cannot be filled is avoided, the uniformity of the pores is greatly improved, the impregnation degree and impregnation efficiency in the later impregnation process are improved, and the physical performance and stability of the wood are improved.

The application relates to a temperature recording device for a cold chain and a temperature recording method thereof. The temperature recording device can be applied to the temperature recording of the fields of food, medicines and the like which need to be kept at low temperature for production, storage and transportation. The temperature recording device comprises a base, a transparent cover, a spiral bimetallic sheet, a central shaft, a shaft sleeve, a temperature pointer, a scale dial and a rotating dial. A one-way hook is arranged on the temperature pointer, a recording arrow and a clamping groove are arranged on the rotating dial, the central shaft is fixed in the center of the base, the shaft sleeve is sleeved on the central shaft and can rotate, the outer end of the spiral bimetallic sheet is connected to the inner wall of the base, the inner end of the spiral bimetallic sheet is connected to the shaft sleeve, the spiral bimetallic sheet is stretched and bent to drive the shaft sleeve to rotate when the temperature changes, the rotating dial is covered above the scale dial and can rotate, the shaft sleeve penetrates through the scale dial and the rotating dial, the lower end of the shaft sleeve is connected to the spiral bimetallic sheet, the upper end of the shaft sleeve is connected to the temperature pointer, the shaft sleeve drives the temperature pointer to rotate, and the transparent cover is covered on the upper portion of the base.

This application provides an injection molded alloy material and a processing method, so as to improve strength of the alloy material, thin a structure of a terminal product, reduce production costs of the product, and improve production efficiency of the product. The injection molded alloy material includes the following components: carbon (C) occupying ≦ 0.10% of a total weight of the alloy material, nickel (Ni) occupying 4.5-8.5% of the total weight of the alloy material, chromium (Cr) occupying 5.5-9.5% of the total weight of the alloy material, molybdenum (Mo) occupying 4.5-7.5% of the total weight of the alloy material, cobalt (Co) occupying 13.0-18.0% of the total weight of the alloy material, vanadium (V) occupying ≦ 1.0% of the total weight of the alloy material, and a remaining component of iron (Fe).

The invention discloses an optimization treatment method for wood for musical instruments. The optimization treatment method comprises the steps of low-temperature forced circulation drying treatment, low-temperature vacuum drying treatment, content regulation and control treatment, accelerated aging treatment and humidity regulation and balance treatment. The accelerated aging treatment comprises high-temperature treatment and low-temperature moisture absorption treatment, the oxygen content of the treatment environment is controlled in the high-temperature treatment process, and the two types of treatment are cyclically alternated for 2-8 times. The method has the advantages of being efficient, environmentally friendly, low in cost, free of additives, capable of keeping the original characteristics of wood and the like, the optimization treatment period of the wood is shortened, and the acoustic performance and the dimensional stability of the wood are further improved while the natural characteristics of the wood are kept to the maximum extent.

A system for improving an electrical conductivity and reducing an electrical energy loss in an electrical component, the system includes a temperature sensor, insulation for enclosing the electrical component and the temperature sensor, a cooling source to be coupled to the electrical component through the insulation, and a computer connected to the cooling source and the temperature sensor, where the computer is configured to control the cooling source to cool the electrical component to a user-definable temperature as indicated by the temperature sensor and maintain the electrical component at the user-definable temperature for a user-definable period of time.

According to an aspect, there is provided a Coulomb blockade thermometer comprising an input electrode; an output electrode; and a sensor component coupled in-between the input and output electrodes. The sensor component comprises: an array of tunnel junctions comprising at least one row of tunnel junctions, a first heat sink and a second heat sink. The tunnel junctions of the array comprise an insulating layer forming a tunnel barrier between two electrically conducting volumes which are characterized by an absence of superconductivity. The absence of superconductivity in the two electrically conducting volumes is achieved by using titanium tungsten layers or scandium layers. The at least one row comprises a first tunnel junction, a second tunnel junction and a third tunnel junction. The first heat sink is coupled to the first and second tunnel junctions. The second heat sink is coupled to the second and third tunnel junctions. The first heat sink and the second heat sink are arranged to provide heat dissipation via electron-phonon coupling.

The invention relates to a process for producing Fe-Cr-Ni austenitic steel reinforced by an oxide dispersion, said process comprising the following steps: a) supplying (100) Fe-Cr-Ni austenitic steel powder; b) carrying out (200) a grinding, called cryogenic grinding, of the Fe-Cr-Ni austenitic steel powder at a temperature between -50°C and -196°C; c) supplying (300) an oxide powder; d) carrying out (400) a co-grinding of the Fe-Cr-Ni austenitic steel powder with the oxide powder thus supplied to obtain Fe-Cr-Ni austenitic steel powder reinforced by an oxide dispersion; and e) producing (500) the Fe-Cr-Ni austenitic steel reinforced by an oxide dispersion from the powder thus produced. Figure for the summary: Figure 1

A virtual thermocouple system for non-invasively predicting product characteristics is disclosed, which includes one or more temperature sensing systems including a resistive network which includes a temperature sensing device comprising a plurality of negative temperature coefficient (NTC) thermistors, and a load resistor, a corresponding system-on-chip coupled to a corresponding resistive network and configured to i) power the corresponding resistive network, ii) receive corresponding signals from each NTC thermistor of the corresponding temperature sensing device, iii) process the signal associated with each NTC thermistor of the corresponding temperature sensing device and thus generate data associated with each NTC thermistor, and iv) transmitting the processed data, a power generating device configured to provide power to the corresponding system-on-chip, and a base stations adapted to i) receive the processed data from a corresponding system-on-chip, and ii) using a predefined model, and non-invasively translate the processed data to thermal characteristics of a product.

The present disclosure discloses a tibial plateau prosthesis with trabeculae containing zirconium-niobium alloy on oxidation layer and a preparation method thereof. The preparation method uses zirconium niobium alloy powder as raw material, conducting a 3D printing for one-piece molding to obtain an intermediate product of the tibial plateau, performing hot isostatic pressing and cryogenic oxidation to obtain the tibial plateau prosthesis comprising a proximal trabecular layer and a distal trabecular layer; the pore size and porosity of the proximal trabecular layer are evenly arranged, and the distal trabecular layer are partitioned; the topological structure of the trabeculae of the tibial plateau prosthesis is gradiently distributed from three dimensions; the micro-strain in the 64%-72% region of the finite element model of the tibial plateau bone tissue is between the minimum effective strain threshold and the supraphysiological strain threshold, which increases the mechanical adaptation of the prosthesis.

The present invention provides a method for producing a rare earth permanent magnet material, which includes one or more deep-cooling and tempering treatments. When the method includes one deep-cooling and tempering treatment, the deep-cooling is performed between the sintering and tempering treatments or after the tempering treatment. When the method includes two or more deep-cooling and tempering treatments, at least one deep-cooling is performed between the sintering and tempering treatments, and at the same time, at least one deep-cooling is performed after the tempering treatment. The method for producing a rare earth permanent magnet material has the advantages of fine structure, homogenized structure, and rapid and easy processing, and can effectively improve the mechanical properties of the rare earth permanent magnet material and maintain excellent magnetic properties.

The invention relates to an installation for measuring the temperature of an external wall of a pipe, the device comprising: a pipe configured to allow the circulation of a fluid; a heat-to-thermoelectricity conversion device, configured to generate a potential difference when there is a temperature difference between an external wall of the pipe and the ambient air; an electronic circuit electrically connected to the heat-to-thermoelectricity conversion device, being configured to extract electrical energy from the potential difference and being configured to measure the temperature of the external wall of the pipe.

A method for direct energy deposition of metal, for example, for wire arc additive manufacturing (WAAM), comprises: (f) moving a tool head (10) and / or a metal structure (1) one relative to the other so that the tool head (10) moves relative to the metal structure (1) in an advance direction (X) on a deposition path along the metal structure (1); (g) directing energy (12) to an energy input location (6) of the metal structure (1) to create a melt-pool (7) that moves in the advance direction (X) along the deposition path; (h) supplying a feedstock metal (11) from the tool head (10) in a discharge direction (Z) directed toward the advancing melt-pool (7) to deposit a new layer (5) of metal on the structure (1); and (i) directing one or more cryogenic coolant jets (20; 22, 24) of cryogenic fluid with a directional component counter to the advance direction (X) towards the new layer (5) so that the cryogenic fluid impinges on the new layer (5) in a coolant impingement region (8) trailing the melt-pool (7) in the advance direction (X).

The bamboo wood deep dyeing method comprises the following steps: 1) bleaching treatment: processing raw bamboo into bamboo pieces, and bleaching after cooking with bleaching agent; 2) modification treatment: modifying the bamboo pieces with 0.4-1.0% alkali liquor, and using ultrasonic wave in the process, and the treatment temperature is 65-75 DEG C, and the treatment time is 20-40 min, and after the treatment, the bamboo pieces are frozen, and after the freezing treatment, the bamboo pieces are thawed for use; 3) dyeing treatment: immersing the bamboo pieces treated in step 2) into 1-4% sucrose aqueous solution, and keeping the temperature at 40-60 DEG C in the process, and keeping the pressure in the tank at 0.05-0.5 MPa, and the dyeing treatment time is 3-5 h; 4) drying treatment: taking out the bamboo pieces treated in step 3), washing the surface floating color, and then drying. The bamboo wood deep dyeing method can further improve the penetration, uniformity and fixation effect of dyeing, and has significant progress compared with the prior art.

Method for determining the temperature of products transported on the conveyor belt of a cryogenic tunnel, comprising the following steps: —continuously measuring the surface temperature of products travelling on the conveyor belt; —measuring the thickness of a product at the point where the temperature measurement is taken; —performing the following evaluation: a. when the thickness of the product is within a certain range, then the temperature measured for said product is considered to be a reliable value; b. when the thickness of the product is outside the range, then the last temperature value of the measured product is considered to be a reliable value according to paragraph a) above; c. after a determined period of time during which the measured thickness is outside the range, it is concluded that there are no products on the conveyor belt and the temperature measurements are no longer taken into account.

The present invention discloses a preparation method of a wood-based cell culture chip with low fluorescence background. The wood is subjected to water immersion treatment with low-concentration alkali solution, laser cutting is performed on the water-soaked wood, the wood is crosslinked with an epoxy-based crosslinking agent, and then lignin is removed. The wood pores are filled with polysaccharide nanofibers to obtain a wood-based cell culture chip with low fluorescence background. Based on the original pores of the wood as cell culture cavities, the present invention uses laser cutting to obtain a flat surface, and then uses crosslinking means to fix the wood framework to keep it stable during the subsequent lignin removal process. Finally, the filling of polysaccharide nanofibers is used to control the depth of the nanopores, thereby controlling the number of cells that can be stored in a single pore and the chemical environment of the cells after entering the wood pores, and completing the preparation of the wood-based cell culture chip with low fluorescence background.

The invention discloses a coconut shell structure imitating wood buffer material and a preparation method and application thereof.The preparation method comprises the following steps that wood is subjected to delignification treatment and soaked in water, and treated wood is obtained; the end face of the treated wood is subjected to end sealing treatment, and a sodium silicate solution is added for primary dipping treatment; and removing the end sealing material on the end surface of the impregnated wood, adding a polyvinyl alcohol solution, carrying out secondary impregnation treatment, and drying to obtain the wood buffer material with the imitated coconut shell structure. The wood buffer material with the imitated coconut shell structure has the advantages of light weight, high strength, good toughness, excellent buffer performance, excellent flame retardant property, good water resistance and the like, can replace a polystyrene foam material, and is widely applied to the field of product packaging.

The present invention discloses a temperature sensor 1 comprising a Fiber Bragg Grating 2, a first coating 3 comprising a polymeric or metallic material such as polyimide, a second coating 4, arranged externally to the first coating 3, comprising a polymeric material such as an epoxy adhesive and a cylindrical sheath 5 comprising a UV light-transparent heat-shrinkable tube 6 of high thermal coefficient at 20 K, as it is the case of polytetrafluoroethylene, arranged externally to the second coating 4, and wherein the cylindrical sheath 5 has suffered a thermal process so that it exerts a pressure or throttling in the radial direction on the outer surface of the second coating 4. This temperature sensor 1 is adapted to provide temperature measurements at cryogenic temperatures without loss of accuracy. Systems 7 including one or more temperature sensors 1 and manufacturing processes of the temperature sensors 1 are also disclosed.

The invention provides a method of producing a piece of delignified wood having a porous structure, said method comprising: chemically treating a piece of natural wood to remove at least 90% of lignin from the natural wood while substantially retaining cellulose-based lumina of the natural wood, thereby producing a piece of delignified wood; after the removing, drying the piece of delignified wood by freeze drying or critical point drying, such that the cellulose-based lumina remain open or unobstructed in a cross-sectional view; and after the drying, further chemically treating the piece of delignified wood to be hydrophobic or resistant to weather or salt water, or forming or depositing a coating on exterior surfaces of the delignified wood. The unique microstructure and composition of the delignified wood can provide advantageous thermal insulation properties, among other advantages described herein.

The invention relates to a process for producing Fe-12 / 18 Cr ferritic steel reinforced by an oxide dispersion, comprising the following steps: a) supplying (100) Fe-12 / 18 Cr ferritic steel powder and oxide powder; b) co-milling (200) the Fe-12 / 18 Cr ferritic steel powder with the oxide powder to obtain Fe-12 / 18 Cr ferritic steel powder reinforced by an oxide dispersion; c) sieving (300) the Fe-12 / 18 Cr ferritic steel powder reinforced by an oxide dispersion to a predetermined initial average particle size; d) reprocessing (400) the Fe-12 / 18 Cr ferritic steel powder reinforced by an oxide dispersion to obtain a predetermined final average particle size which is strictly less than the predetermined initial average particle size; and, e) produce (500) Fe-12 / 18Cr ferritic steel reinforced by an oxide dispersion. Figure for the abstract: Figure 1