16results about How to "Fast heating and cooling" patented technology

The invention discloses a lithium iron phosphate positive electrode material rich in oxygen vacancies and a preparation method and application thereof.The preparation method of the lithium iron phosphate positive electrode material rich in oxygen vacancies has the advantages that the number of heating times can be set in a programmable mode, the heating and cooling speed is high, and the heat treatment time is short; the volatilization amount of the lithium salt is small, and the method is more economical and environment-friendly; according to the method, a programmable constant-current power supply is used for electrifying and heating the carbon-based Joule thermal material, and the carbon-based material is used as a heating stage to realize ultrafast synthesis of the lithium iron phosphate material through a physical contact heat transfer effect; and the oxygen vacancy content can be adjusted by regulating and controlling parameters such as temperature and time. The heat treatment is performed in a specific atmosphere (such as vacuum, inert gas, reducing gas and oxidizing atmosphere), so that the reoxidation of the oxygen vacancies can be reduced, and the formation and the stabilization of the oxygen vacancies are facilitated; the adjustable and controllable range of the oxygen vacancy concentration in the lithium iron phosphate material prepared by the preparation method disclosed by the invention is 2.198 E12 to 7.382 E13Spins / mm < 3 >.

The invention relates to the technical field of soft robots, in particular to a carbon nanosheet-based photo-thermal response thin film driver and a preparation method and application thereof. The preparation method of the carbon nanosheet-based photo-thermal response thin film driver comprises the following steps: adding a UCST type monomer, a cross-linking agent and a photoinitiator into water, and dissolving to obtain a solution A; adding an LCST type monomer, a cross-linking agent and a photoinitiator into the solution of the carbon nanosheets to obtain a solution B; coating one surface of a thin film with the solution A, and curing; and coating the solution B on the other surface of the thin film, and curing to obtain the carbon nanosheet-based photo-thermal response thin film driver. A biomass raw material used for preparing the carbon nanosheet is coconut water. The method is simple in preparation process, mild and controllable in reaction condition and easy to popularize; the size of the carbon nanosheet-based photo-thermal response thin film driver can reach the micron level, the driving process can be accurately controlled, fine elements can be prepared, and the carbon nanosheet-based photo-thermal response thin film driver is high in photo-thermal response sensitivity, high in heating and cooling speed, short in photo-thermal response and recovery time and repeatable.

The present invention provides a temperature control device for a temperature and humidity calibration box and a temperature control method thereof. The device includes a cold source system and a circulation system respectively connected to the primary side and the secondary side of the evaporator. The cold source system includes a compressor, an oil separator, a condenser, a liquid storage, a filter, a heat regenerator and a first flow regulating valve connected in sequence through pipelines; the circulation system includes a buffer tank, a surface cooler, a circulation pump, a first non-return valve and a pipeline heater connected in sequence through pipelines. The device and method have a wide temperature control range and a fast temperature control speed. The opening of the flow regulating valve can be adjusted according to the current working conditions to optimize the system performance; the temperature control accuracy is high. Due to the secondary heat exchange between the heat transfer medium and the air in the box, the influence of the temperature fluctuation of the heat transfer medium on the temperature in the box is reduced, so the temperature fluctuation degree in the box is ≤±0.01℃; the heat generated by the compressor itself is used as a heat source, the energy efficiency ratio is high, the power consumption is small, and the maximum power consumption can be saved by 50%.

The invention discloses a production method for manufacturing an ultra-precision diamond grinding tool through electric spark fusion and laser finishing. The production method comprises the steps that metal alloy powder slurry is prepared; uniformly spraying the prepared metal alloy powder slurry on the surface of a steel substrate; diamond micro-powder particles are uniformly sprayed and adhered to the surface of the metal alloy powder slurry; heating the metal alloy powder slurry by using electric sparks in a vacuum protection atmosphere until the alloy powder is molten; and convex points, floating sand and alloy bumps on the surface of the grinding tool are removed through laser finishing. The grinding tool manufactured through the production method has the advantages of being high in grinding efficiency, long in service life, high in grinding precision and the like, and the production method can be used for manufacturing the special-shaped ultra-precise grinding tool with a long and thin base body, a thin wall and fine diamond; the grinding tool substrate is almost free of thermal deformation due to the fact that electric sparks are high in energy density and high in heating and cooling speed, and diamond thermal damage is small; and convex points on the surface of the grinding tool can be removed through laser finishing, and the surface is smooth and free of floating sand and alloy tumors.

The utility model belongs to the technical field of biological reagent detection, and particularly relates to biological reagent detection equipment. The utility model provides biological reagent detection equipment and aims to solve the problem of low temperature control efficiency of biological reagent detection equipment in the prior art. Biological reagent detection equipment comprises a reagent loading assembly used for loading a thin film chip with a built-in reagent; the temperature control assembly is used for heating or cooling the reagent; the light analysis component is used for analyzing light emitted by the reagent; and the optical assembly is used for guiding the light emitted by the reagent to the light analysis unit. The reagent loading assembly is used for loading the thin film chip with the reagent inside, and the thin film chip is thin and high in heat exchange efficiency, so that the biological reagent detection equipment is high in temperature control efficiency, the thin film chip is low in heat transfer loss, and the temperature increasing and decreasing speed is high.

The invention discloses a determination system of effective sulfur content in ore, including an infrared furnace, a constant temperature water circulation machine, a SO2 detector, a vacuum pump, a lower single chip microcomputer, an electronic balance, a host computer and a carrier gas bottle, wherein the infrared furnace includes a furnace body, a heating chamber surrounded by two arc-shaped reflectors is arranged in the furnace body, a quartz sample tube and a plurality of infrared heating sources are arranged in the heating chamber, the top and bottom ends of the quartz sample tube extend out of the furnace body respectively, the bottom end of the quartz sample tube is connected with the carrier gas bottle through a gas path system, the carrier gas bottle provides oxygen in the quartz sample tube, a solenoid valve is arranged in the gas path system, the top end of the quartz sample tube is connected with the SO2 detector through a pipeline, the vacuum pump is connected with the SO2 detector through a pipeline, the infrared heating source, the SO2 detector, the vacuum pump, and the solenoid valve are electrically connected to the lower single chip microcomputer respectively, and the lower single chip microcomputer and the electronic balance are electrically connected to the host computer respectively. The measurement accuracy of the determination system of effective sulfur content in ore of the invention is high.

The invention discloses a production method for manufacturing an ultra-precise cubic boron nitride grinding tool through plasma arc fusion and electron beam finishing. The production method comprises the steps that metal alloy powder slurry is prepared; uniformly spraying the prepared metal alloy powder slurry on the surface of a steel substrate; cubic boron nitride micro-powder particles are uniformly sprayed and adhered to the surface of the metal alloy powder slurry; heating the metal alloy powder slurry by using plasma arc in a vacuum protection atmosphere until the alloy powder is molten; and performing electron beam finishing to remove salient points, floating sand and alloy bumps on the surface of the grinding tool. The grinding tool manufactured by the production method has the advantages of high grinding efficiency, long service life, high grinding precision and the like; the production method can be used for manufacturing a special ultra-precision grinding tool with a slender substrate, a thin wall and fine cubic boron nitride; the plasma arc energy density is high, the heating and cooling speed is high, the thermal damage of cubic boron nitride is small, and a grinding tool base body almost has no thermal deformation; protruding points on the surface of the grinding tool can be removed through electron beam finishing, and the surface is smooth, free of floating sand and free of alloy tumors.

The chromatographic instrument column box comprises a column box body, an electromagnetic induction coil, a heating pipe, a chromatographic column, a detector and an electromagnetic controller, the column box body is provided with an installation cavity, an air outlet communicated with the installation cavity is formed in the column box body, the electromagnetic induction coil is used for heating the heating pipe, the chromatographic column is arranged on the heating pipe, and the detector is arranged on the chromatographic column. The heating pipe is used for heating the chromatographic column, the chromatographic column is connected with the detector, the detector is used for detecting a to-be-analyzed sample separated by the chromatographic column, the electromagnetic controller is used for controlling opening and closing of the electromagnetic induction coil, the column box is provided with a vaporizing chamber, the vaporizing chamber is communicated with the chromatographic column, and the chromatographic column is connected with the detector. The sample to be analyzed enters from the vaporizing chamber, and enters the detector after flowing through the chromatographic column after being vaporized. The method has the advantages of uniform temperature field distribution in the column box, high temperature rising and falling speed and high temperature control precision, the analysis accuracy and repeatability are greatly improved, the analysis period is shortened, and the real-time performance of analysis data is improved.

The invention discloses a method for efficiently removing carbon deposition on a catalyst. The method provided by the invention comprises the following steps: electrifying the catalyst, wherein current passes through carbon deposition on the catalyst and reacts with CO2 to be removed. The device has the advantages of being high in energy efficiency and practicability, capable of achieving simultaneous chemical production and catalyst carbon removal and the like, particularly, the carbon deposition change on the surface of the catalyst can be observed in real time by monitoring the resistance change of the catalyst, and good conditions are provided for feedback control of the carbon removal process.

The invention discloses an Ir-based intermetallic compound electrocatalyst and a preparation method and application thereof, the catalyst comprises a carrier and an intermetallic compound loaded on the carrier, the chemical formula of the intermetallic compound is IrMo (1-x) Cex, x = 0.1-0.3, the preparation method comprises the following steps: (1) uniformly mixing an iridium salt solution, a molybdenum salt solution and a cerium salt, adding water and carbon black, uniformly mixing to obtain a metal salt precursor mixed solution, and drying the mixed solution to obtain metal salt precursor loaded carbon black; and (2) performing Joule heating treatment on the precursor-loaded carbon black in an argon environment, taking out, washing and drying after the Joule heating treatment is finished, thereby obtaining a final product. The Ce element is introduced, so that the electronic structures of Ir and Mo are obviously optimized, the electro-catalytic hydrogen evolution reaction activity is enhanced, and a huge energy application prospect is shown.

The invention discloses a production method for manufacturing a high-precision grinding tool through electron beam fused diamond. The production method comprises the steps that metal alloy powder slurry is prepared; uniformly spraying the prepared metal alloy powder slurry on the surface of a steel substrate; diamond micro-powder particles are uniformly sprayed and adhered to the surface of the metal alloy powder slurry; and heating the metal alloy powder slurry by using electron beams in a vacuum protection atmosphere until the alloy powder is molten, and fusing and fixing the diamond micro-powder particles and the alloy on the surface of the steel substrate after cooling to form the grinding tool. The high-precision grinding tool obtained through the production method of the high-precision grinding tool has the advantages of being high in grinding efficiency, long in service life, high in grinding precision and the like, the special-type precision grinding tool with a slender base body, a thin wall and fine diamonds can be manufactured through the production method, in addition, the characteristics that electron beams are high in energy density and high in heating and cooling speed are utilized, the diamonds are small in thermal damage, and the quality of the diamonds is improved. And the grinding tool substrate is almost free of thermal deformation.

The utility model discloses a kind of temperature and humidity test box temperature control system, including first refrigeration cycle unit, first temperature control cycle unit, second refrigeration cycle unit, second temperature control cycle unit and expansion cycle unit, second refrigeration cycle unit and first refrigeration cycle unit are connected in series, first temperature control cycle unit is connected and controls first refrigeration cycle unit, second temperature control cycle unit is connected and controls second refrigeration cycle unit, expansion cycle unit is connected on first, second refrigeration cycle unit.The utility model is suitable for wide temperature range, without heater-80~60 ℃ under condition;Temperature control precision is high, temperature fluctuation degree is ≤±0.02 ℃;Temperature rising speed is fast, compared with traditional mode and improve 10%~50%;Energy efficiency ratio is high, power consumption is small, maximum can save 50% power consumption.

The embodiment of the invention discloses a cold-proof sleeping bag with a far infrared heating function. The cold-proof sleeping bag comprises a sleeping bag body and a nanometer carbon fiber heating device, and the nanometer carbon fiber heating device comprises a first insulating film, nanometer carbon fiber textile fabric and a second insulating film which are sequentially stacked. The preparation method of the carbon nanofiber textile fabric comprises the following steps: (1) performing carbonization treatment on quartz fiber / polyester fiber composite fabric to obtain a carbon nanofiber layer; and (2) heating metal until the metal is molten, and uniformly laying the metal on the surface of the carbon nanofiber layer to obtain the conductive carbon nanofiber layer. The novel carbon nanofiber textile material is adopted, far infrared heating can be achieved by externally connecting the mobile power source and utilizing the low-voltage high-temperature technology, and the far infrared heating device has the advantages of being light, thin, comfortable, uniform in heating, precise in temperature control, high in temperature rising and falling speed, high in electricity-heat conversion rate and safe in power source and has good application and popularization value.

The invention discloses a production method for manufacturing a high-precision grinding tool through ion beam fusion cubic boron nitride. The production method comprises the steps that metal alloy powder slurry is prepared; uniformly spraying the metal alloy powder slurry on the surface of the steel substrate; cubic boron nitride micro-powder particles are uniformly sprayed and adhered to the surface of the metal alloy powder slurry; and heating the metal alloy powder slurry by using an ion beam in a vacuum protection atmosphere until the alloy powder is molten, and fusing and fixing the cubic boron nitride particles and the alloy on the surface of the steel substrate after cooling to form the grinding tool. The grinding tool manufactured through the production method has the advantages of being high in grinding efficiency, long in service life, high in grinding precision and the like, and the production method can be used for manufacturing the special precision grinding tool with a slender base body, a thin wall and fine cubic boron nitride; ion beams are high in energy density and high in heating and cooling speed, thermal damage of cubic boron nitride is small, and a grinding tool base body is almost free of thermal deformation.

The embodiment of the invention discloses a military cotton quilt based on a carbon nanofiber textile material. The military cotton quilt comprises a military cotton quilt body and a nanometer carbon fiber heating device, and the nanometer carbon fiber heating device comprises a first insulating film, nanometer carbon fiber textile fabric and a second insulating film which are sequentially stacked. The preparation method of the carbon nanofiber textile fabric comprises the following steps: (1) performing carbonization treatment on quartz fiber / polyester fiber composite fabric to obtain a carbon nanofiber layer; and (2) heating metal until the metal is molten, and uniformly laying the metal on the surface of the carbon nanofiber layer to obtain the conductive carbon nanofiber layer. The novel carbon nanofiber textile material is adopted, far infrared heating can be achieved by externally connecting the mobile power source and utilizing the low-voltage high-temperature technology, and the far infrared heating device has the advantages of being light, thin, comfortable, uniform in heating, precise in temperature control, high in temperature rising and falling speed, high in electricity-heat conversion rate and safe in power source and has good application and popularization value.

The present invention provides a rare earth tungsten hafnium alloy and a preparation method thereof. The atomic percentages of the components of the rare earth tungsten hafnium alloy are as follows: Y 0.5%-2.5%, Hf 10%-30%, and the balance is W. When the rare earth tungsten hafnium alloy is plasma ablated at 2000°C for 60s, the mass ablation rate is ≤10.00×10 ‑3 g / (cm 2 ·s), line ablation rate ≤10.50×10 ‑3 mm / s. The present invention adopts a process flow combining wet ball milling, rapid hot pressing sintering and annealing to prepare a rare earth tungsten hafnium alloy. The preparation method is simple and controllable. The rare earth tungsten hafnium alloy has excellent high-temperature ablation resistance, a density of more than 95%, and a hardness of HV 0.2 Up to 1200.