65results about How to "Fast heating and cooling rate" patented technology

The invention discloses a multi-field coupled environment simulating and online monitoring/observing system. The system comprises: a main body test box provided with a quartz observing window and an infrared window; a mechanical loading module comprising two coaxially arranged mechanical loading shafts and respectively connected with the main shafts of a universal testing machine and a sample clamping device; a multi-field service environment module arranged outside the main body test box and comprising an infrared laser rapid heating device, an X-ray radiation device, a corrosion gas box and a cooling system and respectively used for realizing heating, irradiating, corroding and cooling environments; and a damage online monitoring/observing module comprising a surface/interface strain real-time observation system, an in-situ fracture behavior observation system, a damage signal collecting system and an infrared thermodetector which are arranged outside the main body test box, and damage signal detectors arranged at the upper end and the lower end of a tested sample, and wherein devices contained in the damage online monitoring/observing module are respectively used for real-time capturing of strain information, in-situ fracture image information, damage information and temperature information, and synchronously run through a cynchronous control system.

The invention relates to a method for quickly preparing a high-performance Mg2Si-based thermoelectric material. The method comprises the following steps: (1) weighing according to the stoichiometric proportion of all atoms in Mg2 (1+0.02) Si (1-x) Sbx (0<=x<=0.025), then grinding and uniformly mixing the atoms, and pressing the uniformly mixed powder into a block; (2) subjecting the block obtained in the step (1) to the self-propagating reaction, and then naturally cooling to obtain a single-phase Mg2 (1+0.02) Si (1-x) Sbx compound; (3) grinding the obtained product into powder, and performing discharge plasma activated sintering to obtain the high-performance Mg2Si-based thermoelectric material. The method provided by the invention has the advantages of quickness in reaction, simple process, high efficiency, energy saving, good repeatability and the like, the whole preparation process can be completed within 0.5 h, and the thermoelectric figure of merit ZT of the obtained block can reach 0.73 at 875K.

The invention relates to a new method for quickly preparing a high-performance PbS(1-x)Sex based thermoelectric material. The new method comprises the following steps of: 1) weighing Pb powder, S powder and Se powder as raw materials according to the stoichiometric ratio of all the atoms in PbS(1-x+y)Se(x+z), wherein x is greater than or equal to 0 and less than 1.0, y is equal to 0.02 and z is equal to 0; and when x is equal to 1.0, y is equal to 0 and z is equal to 0.02; next, grinding the powdery raw materials and mixing evenly, and then pressing into blocks; 2) arousing the self-propagating reaction of the blocks obtained in the step 1), naturally cooling after the reaction is completed, thereby obtaining a single-phase PbS(1-x)Sex solid solution; 3) grinding the PbS(1-x)Sex solid solution into powder, performing discharge plasma activated sintering to obtain the high-performance PbS(1-x)Sex based thermoelectric material. The new method provided by the invention has the advantages of high reaction speed, simple process, high efficiency and energy conservation, good repeatability and the like; the whole preparation process can be completed in 0.5 hour.

The invention relates to a backheating gas mixed circulating refrigeration, heating and temperature adjustment system which comprises a circulating fan, a gas exhaust port, a two-channel regenerator, a water-cooling heat exchanger, a liquid nitrogen flow control valve, a liquid nitrogen storage tank, a liquid nitrogen mixer, a heater, a heating stop valve, a refrigeration stop valve, a universal stop valve, a vaporizer, a heat sink, a sensor and pipelines. Gas such as nitrogen or air serves as a circulating working medium, the circulating fan circulates the gas in the pipelines, and the circulating gas cools or heats the heat sink; during high-temperature circulating, heating temperature control is performed on the gas via the heater; during low-temperature circulating, cooling temperature control is performed on the gas via liquid nitrogen; and the cooling or heating quantity of the gas flowing out of the heat sink is recovered via the two-channel regenerator. Therefore, the flow energy consumption is reduced; the circulating fan can operate at a room temperature; the operation reliability of the fan is improved; and precise temperature control can be performed on environmental simulation equipment, namely the heat sink from -173 DEG C to 200 DEG C.

The invention discloses a double fluorescent lyophilized microchip, a kit and a method for the novel coronavirus (2019-nCoV). The kit comprises the lyophilized microchip, a tube of mineral oil, a tubeof positive control, a tube of negative control, a tube of diluent and a tube of nuclease-free water, wherein the lyophilized microchip is coated with a primer, a probe, Taq enzyme, reverse transcriptase, trehalose, Tris-Cl, dNTP, Mg<2+>. According to the lyophilizing condition, the temperature of an insulator is reduced to negative 55 DEG C at a pre-freezing stage; pre-freezing is kept for 1 hour, and equipment is used for vacuumizing, and freeze-drying is kept for 1 hour; in an analytic drying stage, the temperature of the insulator is increased to negative 25 DEG C and kept for 1 hour, isincreased to 37 DEG C and kept for 2 hours and is reduced to 25 DEG C and kept for 1 hour to obtain the lyophilized microchip, and the diluent and sample nucleic acid are added during use. The doublefluorescent lyophilized microchip can be used for simultaneously detecting an ORF 1a/b gene and an N gene. The detection kit and detection method have high accuracy, high specificity, high sensitivityand short detection time.

The invention relates to a performance testing device for a sealing gasket under a high pressure and low temperature environment. The device comprises a test cavity, a liquid nitrogen refrigeration system, an electric heating temperature control system, a pressure adjustment system, a vacuum system, a data acquisition system and a visual observation system. The device provided by the invention cancontrol the temperature and pressure of a system in a wide range, and can realize the sealing performance test of the sealing gasket in the test pressure of 0 to 5 MPa and a temperature control rangeof -160 DEG C to +80 DEG C.

The invention provides an extreme speed PCR reaction detecting device, which comprises a temperature control system, a horizontal transmission mechanism, a reaction tube fixing device, and a perpendicular transmission mechanism.The horizontal transmission mechanism drives the temperature control system to move horizontally, the reaction tube fixing device is connected with the perpendiculartransmission mechanism and capable of moving up and down along an eccentric wheel of the perpendiculartransmission mechanism so as to realize the relative reciprocating movement of a reaction tube on the reaction tube fixing device between temperature control modules. The extreme speed PCR reaction detecting device is compact in structure, the moving speed is fast, the temperature rising and falling speed of reaction liquid in the reaction tube can be increased by the temperature setting of a high temperature module and a low temperature module, the two aspects of increasing the temperature rising and falling speed of the reaction tube and the moving speed between the reaction tube and the temperature control modules are set about to achieve the purpose of shortening the time required for PCR reaction, at the same time, the detection result of the extreme speed fluorescence PCR reaction detecting device is good in repeatability, and the result is accurate.

The invention relates to the technical field of biomedicines and in particular relates to a full-automatic medical fluorescence PCR (Polymerase Chain Reaction) analysis system based on a POCT (Point-of-care Testing) mode. The system comprises a PCR instrument and a client, wherein the PCR instrument is used for amplifying DNA through a PCR reaction; the PCR instrument is further used for performing fluorescence detection on the DNA, generating fluorescence images and transmitting the images to the client; and the client is used for analyzing the fluorescence images and generating analysis results. According to the full-automatic medical fluorescence PCR analysis system based on the POCT mode provided by the invention, the defects that the traditional gene detection process is complicated, the cost is high and the waiting cycle is long can be overcome.

The invention relates to a new method for synthesis of a super fast prepared high performance CoSb3-based thermoelectric material by self-propagating combustion. The new method comprises the following steps: 1) weighing Co powder, M powder, Sb powder and Te powder as raw materials according to stoichiometric ratio of each element in the chemical formula Co4-xMxSb12-yTey, wherein 0<= x <=1.0, 0<= y <=1.0, M is Fe or Ni, the raw material powder is mixed and pressed into a bulk blank body; 2) triggering high temperature self-propagating synthesis reaction of the bulk blank body obtained by the step 1), and after the reaction cooling to obtain a single phase CoSb3 compound; 3) grinding the product of the step 2) into powder for discharge plasma activated sintering to obtain the pure single phase high performance CoSb3-based thermoelectric material. The method has the advantages of fast reaction speed, simple process, high efficiency, energy conservation, good repeatability, and the like. The whole preparation process can be completed in 20min, and the bulk thermoelectric figure of merit (ZT) is 0.98 at 875K.

The invention discloses a dual-direction rotating hot air exchange real time fluorescence polymerase reaction analyzer, comprising tank with electric machine and prime axis inside and hot air exchange circulation device on the top. The hot air exchange circulation device consists of upper air chamber installed on upper part of tank, which has air inlet with hole on its top and the overheating protection has force fan 6 and heating unit within it. The force fan is on upper part of heating unit wherein is overheating protection, and air outlet of air inlet has extending chamber which is in tank and linked to the upper air chamber through circline enclosed air outlet. Extending chamber has temperature sensor inside and upper air chamber has controllable fan blower unit and protection device inside. The invention has properties of automatic monitoring, fast, accurate, not easy pollution, convinient operation, low price, quick popularity, suitable for the need of skeleton medical and health, epidemic prevention and plant and animal test.

A transient state experiment device for catalyst high temperature and high pressure evaluation comprises a reaction shell formed by integrally connecting a constant temperature cabin and a high temperature reactor. A sealing ball valve is arranged on the reaction shell for controlling communication or isolation of the constant temperature cabin and the high temperature reactor. A reaction feed gas inlet and a reaction gas exhaust port are arranged in the high temperature reactor, and the high temperature reactor is provided with a heating device. A protective gas inlet and a pressure relief opening are formed in the constant temperature cabin, and the constant temperature cabin is provided with a cooling device. A hanging basket driving device drives a basket to carry a catalyst to descend to enter the high temperature reactor or ascend to enter the constant temperature cabin. The experiment device can accurately represent the real condition of the catalyst when the reaction is stopped, and representation of catalyst intrinsic behaviors based on high temperature and high pressure gas phase catalyst reactions is achieved.

The invention discloses a freeze-dried microchip for identifying a porcine reproductive and respiratory syndrome virus classic strain and an NADC30-Like strain, a kit and a method thereof, which belong to the field of molecular detection. The freeze-dried microchip is characterized in that a fluorescent PCR reaction system used for identifying the porcine reproductive and respiratory syndrome virus classic strain and the NADC30-Like strain is fixed on the microchip through freeze-drying; wherein the fluorescent PCR reaction system comprises the following primers and probes: a porcine reproductive and respiratory syndrome virus classic strain upstream primer, a porcine reproductive and respiratory syndrome virus classic strain downstream primer and a porcine reproductive and respiratory syndrome virus classic strain Taqman probe sequence; an NADC30-Like strain upstream primer, an NADC30-Like strain downstream primer, and an NADC30-Like strain Taqman probe. According to the present invention, the porcine reproductive and respiratory syndrome classical strain virus and the NADC30-Like strain virus are simultaneously detected, and the detection kit has characteristics of high accuracy,high specificity, high sensitivity and short detection time.

The invention relates to an MgB2 Josephson junction and a fabrication method thereof. The MgB2 Josephson junction is of an MgB2/barrier layer/MgB2 structure, a barrier layer between an upper MgB2 superconduction layer and a lower MgB2 superconduction layer comprises a high-boron compound of boron or magnesium, the MgB2 layer is a superconduction layer, a groove is etched in the center of a boron layer between the upper MgB2 superconduction layer and the lower MgB2 superconduction layer, and a junction region barrier layer is arranged at the bottom of the groove. The maximum energy gap of the MgB2 Josephson junction at 20K reaches 1.17meV, and the working frequency reaches 500GHz. Rapid annealing is performed on an electronic beam in vacuum to obtain the MgB2 Josephson junction; a precursorfilm of the MgB2 Josephson junction is obtained by an electronic beam evaporation method and focusing ion beam etching, the precursor film is annealed within time within several second order of magnitude, so that magnesium and boron in the precursor film react to obtain the Josephson junction; and different types of Josephson junction can be obtained from the MgB2 Josephson junction after annealing according to different focusing ion beam etching processes.

The invention relates to a surface temperature signal fast generating device which is provided with a semiconductor refrigerator, a water/gas heat exchange device, an infrared sensor, liquid crystal, an upper computer and a control circuit, wherein as a temperature signal generating element, the semiconductor refrigerator is formed by a plurality of groups of P-N structures and has a cold end surface and a hot end surface; the water/gas heat exchange device comprises water/gas two-path exchange systems and is provided with an electromagnetic valve, a water pump and an air pump which are connected with a control signal output by a control circuit; the infrared sensor is assembled above the semiconductor refrigerator, acquires the surface temperature of the semiconductor refrigerator and outputs the surface temperature to the control circuit; the liquid crystal displays the surface temperature of the semiconductor refrigerator in real time; and simultaneously, a control chip serial port sends temperature data to the upper computer in real time so as to lead the upper computer to send relevant instruments to a control chip in the control circuit for control according to the temperature change.

The invention relates to a heating device for a semiconducting material hot wall epitaxy growth system, which comprises a radio-frequency heater and a graphite sleeve, wherein the graphite sleeve is arranged in an induction heating coil of the radio-frequency heater; the inner wall and the outer wall of the graphite sleeve are respectively coated with a heat-conduction and noncombustible insulating layer; and the graphite sleeve is placed in an inert gas environment. The heating device provided by the invention adopts radio-frequency for heating the graphite sleeve, can be used for quickly heating and cooling, and has the advantages of energy conservation, long service life, maintenance-free and the like. Since the diameter of the induction heating coil can be enlarged, quick heating of a large-area reaction chamber can be realized through heating the large-sized graphite sleeve.

The invention discloses a constant temperature box device based on a distributed optical fiber temperature measuring system. The constant temperature box device comprises a calibration fiber (5), a wavelength division multiplexer (WDM) (7), an APD module (8) and a light source (10), and is characterized by further comprising a refrigeration sheet radiator (2), a refrigeration sheet (3), an insulating layer (4), a constant temperature box pure copper thickened inner wall (6), a constant temperature inner wall temperature sensor (9) and a radiator temperature sensor (11). The constant temperature box device has the following specific beneficial effects and advantages that 1, the size is small and the installation design is flexible; 2, the semiconductor refrigeration sheet is used as a corefor designing to reduce development cost; 3, the use requirements of the distributed optical fiber temperature measuring system with high standards can be met; 4, the constant temperature box device is of integrated box design and is convenient to maintain; 5, the constant temperature of the constant temperature box device can be automatically adjusted according to requirements, and the temperature range is (-10)-85 DEG C; 6, the constant temperature deviation of the constant temperature box device is +/-0.1 DEG C; and 7, the rate of temperature rising and the rate of temperature fall are high, and the rate of temperature rising is 3 DEG C/min and the rate of temperature fall is 2 DEG C/min.

The invention relates to a method for rapidly preparing a single-phase Bi2S3 thermoelectric compound. The method comprises the following steps: (1), preparing Bi powder and S powder as raw materials at a stoichiometric ratio Si:S = 2:3.06, the sulfur powder material being excessive by 2% relative to the stoichiometric ratio of compound Bi2S3, and then grinding and thoroughly mixing them to obtain reactants; (2), initiating the reactants obtained in step (1) to take place a self-propagating reaction or thermal explosion reaction, and after the reaction is completed, naturally cooling to obtain a single-phase Bi2S3 thermoelectric compound. The method provided by the invention has the advantages of high reaction speed, simple equipment, good repeatability, high efficiency, energy conservation and the like.

The invention discloses a raw material, preparation device and method for preparing a foamed ceramic insulation board based on a rolling method. The preparation device comprises a rolling device (6) for carrying out rolling forming on the raw material of the foamed ceramic insulation board, an annealing kiln (7) which is connected with the rolling device (6) and is used for carrying out solidification treatment on the foamed ceramic insulation board; the roller plate forming of the raw material of the foamed ceramic insulation board is realized through the rolling device (6); and the cooling aggregation shaping is realized through the annealing kiln (7), and a mold is not needed for shaping any more, so that the production efficiency of preparing the foamed ceramic insulation board is improved.

The invention relates to the field of ultrahigh-temperature ceramic materials, in particular to an HfCxNy ultrahigh-temperature ceramic powder material and a preparation method thereof, wherein the sum of x and y is more than 0 and less than and equal to 1. The material is prepared by induction heating pressureless sintering, the preparation method includes: (1) adding Hf, C and HfN powder into anylon tank according to the proportion, adopting absolute ethyl alcohol as a medium and conducting wet milling to obtain powder paste; (2) performing rotary evaporation of the powder paste and dryingand screening to obatin Hf-C-HfN mixing powder, and conducting cold press molding in a stainless steel mould; and (3) placing the formed blank into a graphite crucible and puting the formed blank withthe graphite crucible into an ultrahigh-temperature induction heater, perfroming pressureless sintering under nitrogen atmosphere to obtain HfCxNy ultrahigh-temperature ceramic. The HfCxNy superhigh-temperature material prepared by the method has the advantages of high purity, simple preparation process flow, short preparation period and the like.

The invention provides a method for measuring the surface temperature of a gold nanorod, a heat transmission device constructed by using the gold nanorod, and application. The measuring method comprises the following steps: connecting a DNA probe to the surface of the gold nanorod through a gold-sulfur bond, dispersing in an alkaline buffer solution, and heating by using laser; and enabling the DNA probe to release fluorescence from the surface of the gold nanorod and emit fluorescence, detecting the fluorescence intensity of the DNA probe, and calculating the surface temperature of the gold nanorod according to the fluorescence intensity. The nanometer local temperature around gold nanoparticles is measured by utilizing the instability of gold-sulfur bond, the heat transmission device of a gold nanorod surface temperature field is constructed, and meanwhile, the length of a spacer region and a reaction region of the DNA probe can be designed and nucleic acid amplification can be carried out through the device; and by utilizing the method, the volume of a PCR reaction system can be obviously reduced, the temperature increasing and decreasing rate in the nucleic acid amplification process is greatly improved, and the time required by the amplification reaction is shortened.

The invention discloses an efficient detachable electric heater heat source assembly with a filtering function. The efficient detachable electric heater heat source assembly comprises a heat source assembly, and the multiple heat source assemblies are installed in the electric heater in a matched mode. Each heat source assembly structurally comprises a tube shell of a cylindrical structure, two ports of the tube shell are open, a flange plate is fixed to one end of the tube shell, a plurality of first long-strip-shaped holes are formed in the tube wall of the other end of the tube shell in thecircumferential direction at intervals, and a cone structure is installed at the end of the tube shell in a matched mode. A resistance tube element is installed in the tube shell in a matched mode, the installation structure of the resistance tube element is that an electrode plate parallel to the flange plate is further arranged in the tube shell, and S-shaped resistance tubes which are oppositely arranged are installed between the flange plate and the electrode plate. By the adoption of the assembly type structure, during maintenance, the whole electric heating component does not need to becompletely pulled out, only one damaged assembly needs to be pulled out, the workload is greatly reduced, maintenance is rapid and efficient, and the cost is low.

The invention discloses a high-power heater capable of quickly warming and cooling, which comprises a furnace body and is characterized by also comprising a layer of or a plurality of layers of metallic reflecting plates arranged on the furnace body and heating wires positioned on the metallic reflecting plates. In the high-power heater, the metallic reflecting plates are adopted to replace PBN (Pyrolytic Boron Nitride) ceramic insulation boards and ceramic parts as main heat insulation and insulating materials of the heater. The high-power heater has the following advantages that 1, the heater is made of tungsten, molybdenum and rhenium or other high-temperature alloys, and the insulation materials are made of 99 ceramic, so that the service life can be improved; 2, by applying the metallic reflecting plates, the downward heat of the heating wires can be reflected upwards, so that the temperature uniformity and the warming and cooling rate can be improved, and the energy consumption and the cost can be reduced; and 3, the heater is applicable to any environment protected by hydrogen or nitrogen.

The invention discloses a cold and hot integrated vacuum freeze dryer. The cold and hot integrated vacuum freeze dryer includes a dry bin, a shelf, a cold trap, an acrylic plate, a regulating valve, arefrigeration and heating all-in-one machine, a vacuum pump and a control system; a frame is of a main body outer frame structure, a touch screen is installed on a frame panel, and the control systemis installed inside the fame; the dry bin is connected with a dry bin acrylic plate; the shelf is installed inside the dry bin; a cold trap communicates with the dry bin through a vacuum degree regulating valve and is connected with a cold trap acrylic plate at the same time; a door knob is installed on the dry bin acrylic plate and the cold trap acrylic plate; the vacuum pump is connected with the cold trap; a refrigeration and heating all-in-one unit is connected with the cold trap through a cold trap refrigeration pipeline, and a shelf refrigeration and heating pipeline is connected with the shelf. The cold and hot integrated vacuum freeze dryer is compact in structure, convenient to operate, and good in temperature uniformity, one-button automatic operation and the vacuum degree control function can be realized, the intelligent level of cold and hot integrated vacuum freeze dryer is improved effectively, and the operative difficulty index of operating staff is reduced sharply.