37results about How to "Improve uneven heating" patented technology

An object such as food is heated favorably by means of microwaves while enclosing the food with superheated steam. The apparatus comprises a heating chamber in which an object to be heated is put, steam generating means for supplying superheated steam to the heating chamber, superheated steam maintaining means provided in the heating chamber to prevent the temperature of the superheated steam in the heating chamber from lowering, and microwave generating means for irradiating the object with microwaves. The object placed in the heating chamber is heated in superheated steam with microwaves, so that the food is efficiently heated from inside and outside and the food is not wetted.

An object such as food is heated favorably by means of microwaves while enclosing the food with superheated steam. The apparatus comprises a heating chamber in which an object to be heated is put, steam generating means for supplying superheated steam to the heating chamber, superheated steam maintaining means provided in the heating chamber to prevent the temperature of the superheated steam in the heating chamber from lowering, and microwave generating means for irradiating the object with microwaves. The object placed in the heating chamber is heated in superheated steam with microwaves, so that the food is efficiently heated from inside and outside and the food is not wetted.

The invention discloses a flexible far-infrared heating aramid fiber nanofiber film and a preparation method thereof. The flexible far-infrared fiber film is obtained by uniformly dispersing carbon nanotubes with nanoscale structure, excellent mechanical properties and electrical properties and aramid nanofibers with excellent mechanical properties. Infrared heating aramid nanofiber film, giving full play to the excellent film-forming properties of aramid nanofibers, and the advantages of their abundant functional groups on the surface that are easy to produce a strong network cross-linking structure, synergistically improving the dispersion performance and film-forming of carbon nanotubes Performance, the development of aramid nanocellulose-based new materials with both flexibility and conductivity, and low-temperature and far-infrared heating properties has improved the uneven heating surface of current flexible heating materials, excessive temperature differences, unstable heating performance, and low service life. Improve product grades to meet the application requirements of electrothermal physiotherapy functional clothing, intelligent physiotherapy safety clothing, and medical far-infrared treatment cabins.

The invention relates to the silicon film material preparation filed, and concretely relates to a method for preparing a nanometer silicon film through an intermediate-frequency magnetron sputtering process, and its special device. The method comprises the following steps: sputtering non-equilibrium state twin magnetron silicon targets forming a coupling magnetic field with an applied solenoid by adopting an intermediate-frequency power supply to excite a plasma through utilizing the intermediate-frequency magnetron sputtering process; depositing a nanometer silicon film on a substrate, wherein sputtering of an Ar gas is adopted, the pressure is measured by an ionization gauge, the pressure is controlled between 0.2 and 1.5 in the whole deposition process, the current of the applied solenoid is 0-6A, and the deposition time is 30-90min; evacuating a vacuum chamber to 10<-3>-10<-4>Pa through adopting a vacuum pump group; and heating the substrate to 400-500DEG C to obtain the nanometer silicon film. In the invention, the applied solenoid is adopted to continuously adjust the nonequilibrium degrees of the twin targets, so high-rate ion auxiliary deposition of the nanometer silicon film under low power is realized, the crystal structure of the film is controllable in a large range, and the optical band gap is adjustable.

The invention belongs to the technical field of laser welding, and provides a method for assisting high-temperature laser brazing through self-propagating reaction of a nano-multilayer film. A double-metal nano-film is alternately deposited on a substrate by adopting a magnetron sputtering method; the deposited double-metal nano-multilayer film is stripped from the substrate; the stripped multilayer film is arranged between two layers of brazing materials, so that a composite intermediate layer is formed; surface pretreatment is conducted on base materials to be welded; and the composite intermediate layer is arranged between obtained base materials, a lap joint mode is adopted for welding, and lasers are adopted for carrying out scanning welding on the composite intermediate layer. The nano-multilayer film is subjected to the self-propagating reaction after being ignited by the lasers, a large amount of heat released by the reaction can melt low-melting-point brazing materials, and thus connection is achieved on both lap joints and whole lap-joint faces in the welding process, so that the joint connecting strength is improved, and material connection is completed. By means of the method, heating nonuniformity of the lasers used as local heat sources can be relieved, the more uniform interface reaction is achieved, and the joint density can be increased.