5results 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 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 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 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 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.