1011 results about "Far infrared" patented technology

The invention discloses a far-infrared band optical thin film, a preparation method thereof and an optical element, and relates to a far-infrared band optical thin film technology, the far-infrared band optical thin film comprises a substrate, a front band-pass film system and a back cut-off film system; wherein the front band-pass film system is located on one side of the substrate, and the back cut-off film system is located on the other side of the substrate; the far infrared band optical thin film is prepared by alternately depositing lead telluride serving as a high-refractive-index thin film material and cadmium telluride serving as a low-refractive-index thin film material. The far infrared band optical thin film can cut off the band with the wavelength smaller than 4 microns, and the average transmittance is 0.23%; anti-reflection is carried out at the wave band of 5-50 microns; the moisture-resistant performance is excellent.

The invention discloses a preparation method and application of a coating wool fabric with a far infrared health-care function. The preparation method comprises the following steps: dissolving waste wool by adopting an ionic liquid method to extract regenerated keratin powder, and doping the regenerated keratin powder, chitosan quaternary ammonium salt and functional particles into a membrane substrate material by adopting a blending modification method to prepare a functional coating material; and in combination with plasma pretreatment, coating the surface of the wool fabric with the functional coating material, and further performing crosslinking modification to obtain the far-infrared health-care functional coating wool fabric. According to the method, the problems that the wool fabric subjected to resin coating modification is hard in hand feeling and damaged in style are effectively solved, waste keratin resources are fully utilized, and secondary utilization of the resources is achieved; the electrical heating textile is prepared by using the excellent thermal conductivity and high conductivity of graphene and carbon nanotubes, and more far infrared rays are radiated along with the temperature rise of the graphene heating film.

The invention relates to the technical field of physical sign detection, and discloses a far infrared radar non-contact physical sign detection method and device, and the method comprises the steps: collecting radar echo data and body temperature data of a plurality of target objects in a detection region through a far infrared sensor and a millimeter wave radar; carrying out heartbeat and respiration signal analysis on the radar echo data to generate a first heartbeat parameter and a first respiration parameter, and carrying out body temperature distribution analysis on the body temperature data to generate a body temperature distribution parameter; calculating a second heartbeat parameter and a second breathing parameter of each target object based on the first heartbeat parameter and the first breathing parameter; according to the second heartbeat parameter, the second breathing parameter and the body temperature distribution parameter, a physical sign detection result of each target object is generated, the abnormal heartbeat, breathing and body temperature states can be automatically recognized, a comprehensive health assessment result is generated, and the accuracy of non-contact physical sign detection is improved.

The invention discloses a far-infrared high-transmittance composite material, a preparation method thereof and an optical device, and the far-infrared high-transmittance composite material comprises the following components in parts by weight: 70-99 parts of a polymer matrix; 1-30 parts of an anti-reflection auxiliary agent; the polymer matrix is a sulfur-containing polymer prepared by polymerization reaction of a polymeric monomer and sulfur, and the proportion of carbon-carbon unsaturated bonds is less than 3%; the polymeric monomer is selected from at least one of a vinyl monomer, a propenyl monomer, an acrylic acid monomer, a methacrylic acid monomer, an epoxide monomer, a thiopropyl ring monomer, an alkynyl monomer, a butadiene monomer, an isoprene monomer and a norbornene monomer; the anti-reflection auxiliary agent comprises at least one of nano zinc sulfide, nano zinc selenide, nano calcium fluoride, nano magnesium fluoride and nano magnesium oxide. The composite material and the optical device thereof have high far infrared transmittance and good mechanical properties and processability, and can meet the requirements of various far infrared optical fields.

The invention discloses a sixteen-hole multifunctional polyester staple fiber and a preparation method thereof, and relates to the technical field of functional fibers. Sodium alginate is used as a skin layer, polyethylene glycol terephthalate is used as a core layer, functional layering is achieved through skin-core compounding, and the interface bonding force between sodium alginate and polyethylene glycol terephthalate is enhanced through glutaraldehyde; in the melting processing process of polyethylene glycol terephthalate, a chain extender is used for reducing the melting point of the polyethylene glycol terephthalate so as to reduce the pyrolysis risk of sodium alginate, meanwhile, a low-polarity lubricant is used for grafting zirconium carbide so as to balance the lubrication and enhancement functions and realize far infrared and antistatic properties, and then an aniline monomer is initiated to polymerize on the surface of zirconium carbide so as to prepare the far infrared anti-static polyethylene glycol terephthalate composite material. Seaweed-carbon can generate far infrared radiation and negative ions, and zirconium carbide can be used as an electron acceptor to enhance the carrier mobility, so that the far infrared and antistatic properties of the fiber are enhanced.

The invention discloses double-sided coated glass. The double-sided coated glass comprises a glass substrate, a first coating layer and a second coating layer, the first coating layer is arranged on the front surface of the glass substrate and sequentially comprises an anti-reflection layer, an ultraviolet reflection layer and a middle and far infrared reflection layer from the glass substrate to the outside; the second coating layer is arranged on the back surface of the glass substrate and sequentially comprises a near-infrared reflecting layer and a near-infrared regulation and control layer from the glass substrate to the outside, and the near-infrared regulation and control layer is used for regulating and controlling the reflectivity of the near-infrared reflecting layer. According to the design of the front anti-reflection layer of the double-sided coated glass, through continuous transition of the particle size and the refractive index of nanoparticles, the visible light reflectivity is remarkably reduced, and the light transmittance of the glass is kept to be 85% or above and is superior to that of existing composite coated glass; meanwhile, through the synergistic effect of the ultraviolet reflecting layer, the middle and far infrared reflecting layer and the back near-infrared reflecting layer, the ultraviolet blocking rate can be larger than or equal to 99%, the comprehensive infrared blocking rate can be larger than or equal to 90%, and the technical problem that light transmission and blocking performance of traditional glass are difficult to consider at the same time is solved.

The invention relates to the field of PU, and particularly discloses a far infrared magnet therapy PU seat skin and a preparation method thereof.The far infrared magnet therapy PU seat skin sequentially comprises a base cloth layer, a solvent-free bonding layer, a high-solid foaming layer, a polyurethane surface layer and a surface layer from bottom to top; the high-solid foaming layer is prepared from the following components in parts by weight: 70 to 90 parts of high-solid resin, 5 to 8 parts of a cross-linking agent, 0.5 to 1.5 parts of a foaming agent, 0.5 to 1.0 part of a flatting agent, 10 to 15 parts of a flame retardant, 0.05 to 0.2 part of color paste, 10 to 20 parts of far infrared ceramic micro powder and 2 to 8 parts of germanite magnetic powder. The seat skin has a good far infrared ray transmission effect and high strength, and has a good health care effect.

According to the preparation method of the radiation refrigeration colored coating with the double-layer structure, absorption of ultraviolet-visible light and near-infrared wave bands is weakened and heat input is reduced by adding a fluorescent coloring agent and designing a bottom strong reflection layer, meanwhile, high-emissivity varnish is selected as a base material, and the radiation refrigeration colored coating with the double-layer structure is prepared. The capability of emitting heat outwards in a middle and far infrared radiation form of the colored paint is improved, so that efficient cooling is realized. The prepared colored paint has rich and adjustable colors and a good cooling effect, is low in cost and simple in process, and is expected to be applied to the fields of high-power electronic equipment, building heat management and the like.

The invention provides a capsule vibration isolation system based on nanobubbles, and belongs to the field of vibration isolation devices. The capsule vibration isolation system based on the nanobubbles comprises a vibration isolation capsule, the vibration isolation capsule is filled with buffer liquid and solid particles, the nanobubbles are attached to the surfaces of at least part of the solid particles, and bubble attached particles are formed; wherein the bubble attachment particles are configured to collide under the action of elastic waves of the vibration source, so that nano bubbles on the surfaces of the bubble attachment particles are broken, and the bubble attachment particles generate internal energy based on collision friction and bubble breakage to increase energy dissipation of the elastic waves so as to perform vibration isolation treatment on the elastic waves of the vibration source; and the preparation device is configured to prepare the nano bubbles based on a target generation rate under the control of the far infrared control signal, and input the nano bubbles into the vibration isolation bag body through the lower surface of the vibration isolation bag body so as to change the concentration of the bubble attachment particles in the vibration isolation bag body.

The invention provides a multiband photoresponse nerve synapse device based on a two-dimensional and organic heterostructure, an array and application, and belongs to the technical field of organic electric solid-state devices. The device provided by the invention adopts a three-end bottom gate top contact structure and comprises a gate substrate, an insulating layer, a channel layer and a source / drain electrode, and the channel layer forms an II-type heterojunction by a two-dimensional semiconductor material with a narrow-band gap characteristic and an organic semiconductor material. The heterostructure realizes ultraviolet to far infrared (365nm-10 [mu] m) multiband photoelectric response, and shows synaptic plasticity under light pulse modulation, including short-term enhancement, long-term enhancement and learning-forgetting-re-learning characteristics. Large-area array preparation of the device can be realized through methods such as chemical vapor deposition, solution spin coating, jet printing or layer-by-layer self-assembly. The technology not only can be used for brain-like learning and memory simulation, but also can be applied to the fields of sensing and memory integrated intelligent systems, optical neural networks, artificial vision, multi-mode intelligent sensing and the like.

The present invention improves load resistance while also improving waterproofing. This vehicular glass has a glass substrate and is provided with a light-shielding region. A far-infrared transmitting region is formed in the light-shielding region, the far-infrared transmitting region being provided with an opening formed in the glass substrate and a far-infrared transmitting member disposed in the opening. The glass substrate and the far-infrared transmitting member are joined via a frame member. The frame member has: a seal part that is sandwiched between the far-infrared transmitting member and the glass substrate; a support part that is provided on a first direction side, which is the thickness direction of the glass substrate, of the seal part and the glass substrate; and an adhesion part that is between the seal part and the support part. The height of a step in the first direction between the surface of the glass substrate on a second direction side thereof opposite to the first direction and the surface of the far-infrared transmitting member on the second direction side thereof is less than 0.3 mm.

The invention relates to the technical field of transfer films, in particular to a graphene-containing far-infrared warm-keeping polyurethane transfer film and a preparation method thereof. The far-infrared warm-keeping polyurethane transfer film containing graphene comprises a three-layer structure including a supporting layer, a polyurethane transfer layer and a bonding layer, the polyurethane transfer layer is located on one side of the supporting layer, and the bonding layer is located on the other side of the polyurethane transfer layer; the polyurethane transfer layer is prepared from polyurethane resin, an organic solvent, an organic pigment and a composite modifier, the composite modifier is prepared from alkenyl modified graphene oxide, chloropropenyl modified hindered phenol and 4-allyloxy-2-hydroxybenzophenone, and the composite modifier is added, so that the polyurethane transfer layer is formed. The polyurethane transfer film has far infrared thermal insulation performance and good oxidation resistance and hydrolysis resistance.

The invention belongs to the technical field of mid-infrared photoelectric detectors, and particularly relates to a mid-infrared photoelectric detector based on an ultra-thin metasurface and a preparation method thereof.The method comprises the steps that firstly, a substrate and an element atomic material are provided, an ellipsometry test is conducted to obtain dielectric functions of the substrate and the element atomic material, the dielectric functions serve as input to be substituted into finite element software, and the finite element software serves as the input to obtain the ultra-thin metasurface-based mid-infrared photoelectric detector; theoretical modeling design is carried out on the metasurface, the metasurface is manufactured after the appropriate metasurface size is obtained, then reflectivity and transmissivity tests under different polarizations are carried out on the metasurface through an ellipsometry test, a metal layer is deposited on the metasurface through a standard electron beam evaporation technology to serve as an electrode, and the metasurface is manufactured. And finally, a CO2 laser is selected to irradiate the metasurface in a photoelectric detection experiment. By optimizing the structure parameters and the material performance of the metasurface, middle and far infrared broadband absorption, efficient photo-thermal conversion and photoelectric response are achieved, and therefore the problems that in the prior art, the corresponding wavelength is short, devices are heavy, and the detection efficiency is insufficient are solved.

The invention relates to the technical field of train operation safety monitoring, and discloses a train obstacle detection method and system based on a four-eye sensor. The method comprises the following steps: constructing a three-dimensional sensing space fusing geometry, texture and temperature information by synchronously acquiring binocular visible light and binocular far infrared three-dimensional image data and carrying out cross validation and spatial association of heterogeneous visual information. And further combining orbit coordinate system constraints, dynamically generating and cutting a sensing space slice accurately corresponding to the rail-mounted area, and inputting the sensing space slice into the network to complete obstacle identification and positioning. And finally, calculating the threat degree based on the context, and generating an obstacle list. According to the method, multi-source heterogeneous information is fused, dynamic adaptation of a sensing space and a running orbit is realized, the robustness, the accuracy and the real-time performance of obstacle detection in a complex environment are improved, and false alarms and missing alarms are reduced.

The invention relates to the technical field of building energy-saving intelligent windows, and discloses a sunlight and heat radiation multi-adjustment intelligent window and a preparation method and application thereof. The intelligent window comprises an outer surface layer, a middle layer and an inner surface layer which are stacked in sequence. The outer surface layer comprises an infrared transparent layer, and an infrared reflecting layer and a doped vanadium dioxide layer which are respectively arranged on two opposite surfaces of the infrared transparent layer; the inner surface layer comprises a transparent substrate and a conductive layer attached to the surface of one side of the transparent substrate; the middle layer is a liquid crystal / polymer dimming layer, one side of the liquid crystal / polymer dimming layer is bonded with the infrared reflecting layer, and the other side of the liquid crystal / polymer dimming layer is bonded with the conductive layer. According to the intelligent window, multiple cooperative regulation and control of sunlight and heat radiation can be achieved, the regulation and control wave band is wide, the response speed is high, and the energy-saving effect is good. The regulation and control wave band covers visible light, near infrared and middle and far infrared ranges, reversible change can be realized along with the change of environment temperature, and all-year-round and all-weather energy saving is realized.

The invention discloses a microwave mesh belt uniform drying device for ceramic roller kiln slurry blanks. The microwave mesh belt uniform drying device comprises a base, an air supply conveying mechanism and a moisture removal fan. According to the microwave mesh belt uniform drying device for the ceramic roller kiln slurry blank, a blank body is subjected to segmented heating through the first microwave heating assembly, the second microwave heating assembly and the third microwave heating assembly, and after segmented heating, the blank body is subjected to far infrared heating through electric infrared rays, so that the drying efficiency of the blank body is improved; in addition, a small-diameter stick is selected for conveying the uncured blank body, namely the blank body at the first microwave heating assembly, so that the blank body is prevented from being deformed and cracked due to heating; meanwhile, in the conveying process, the chain transmission structure drives the fan blade assembly to gradually flow to the first microwave heating assembly and the second microwave heating assembly of the drying kiln from the kiln tail, namely the waste heat generated in the drying process of the third microwave heating assembly, namely, the waste heat is conveyed to provide hot air with humidity for front-section drying; and the drying efficiency and the heat energy utilization rate are improved.

This invention facilitates attachment to glass while improving water-stopping performance. The present invention is provided with: a far-infrared transmitting member that is disposed in an opening formed in a glass substrate; and a frame member that fixes the far-infrared transmitting member to the glass substrate. The frame member has a first holding part held between the far-infrared transmitting member and the glass substrate. The first holding part has a first portion formed from a first material, and a second portion formed from a second material different from the first material and having a lower softening temperature than the first material. The second portion is provided radially on the outside of the first portion.

The utility model relates to the technical field of reactor heating, and specifically to a far-infrared heating reactor with uniform heating, comprising a reactor body, a middle heating cavity recessed inwardly arranged on the bottom end surface of the reactor body, a first fixing ring coaxially sleeved on the outer side of the lower part of the reactor body, connecting plates connected to the reactor body symmetrically arranged on both sides of the top end surface of the first fixing ring, a first heating mechanism detachably sleeved on the outer side of the reactor body above the first fixing ring, and a second heating mechanism detachably arranged below the first fixing ring and located at the bottom of the reactor body. The utility model can heat the reactor body internally and externally at the same time through the arrangement of the first heating mechanism coordinated with the second heating mechanism, thereby improving the heating rate and heating effect of the material inside the reactor body. At the same time, the arrangement of the first heating mechanism and the second heating mechanism detachably connected to the reactor body facilitates the later maintenance or replacement of the first heating mechanism or the second heating mechanism, thereby improving the applicability.

To elicit a hot-bath effect to be able to be sufficiently enjoyed simply and easily with less stress than a conventional sauna and cause deep inside the body to be warmed with comfort as never experienced before. In order to realize this, a lava bathing-spa device 1 includes a heat / steam generating device 20 which is installed in a spa room 10 including a door 15 capable of being opened / closed and which generates heat and steam, an interior material 16RP which contains ores generating far infrared rays, and which is installed in the spa room 10, and a heating device which heats the interior material 16RP from inside or a back side thereof.

The invention is applicable to the technical field of fabrics, and provides a temperature-locking and heat-storing layered fabric and a down jacket, the temperature-locking and heat-storing layered fabric comprises a far-infrared nylon base fabric layer and a heat-storing printing layer locally arranged on the far-infrared nylon base fabric layer, slurry of the heat storage printing layer is prepared from the following raw materials: modified aerogel, modified nano Tai Chi stone, nano graphite, a dispersing agent, a cross-linking agent, a thickening agent, modified polyethylene glycol and water. According to the temperature-locking heat-storage layered fabric disclosed by the invention, the far infrared nylon base cloth layer and the heat storage printing layer are arranged, so that internal heat energy is reflected, circulating temperature locking and heat storage are realized, and the heat storage effect is good; modified aerogel is added into slurry of the heat storage printing layer, the heat storage printing layer has a rich nano porous structure and can effectively isolate heat transfer, modified nano Tai Chi stone is added, heat of a human body can be absorbed and stored, energy loss is avoided, far infrared rays are emitted, and the effects of heating and keeping warm are achieved. By adding nano-graphite and modified polyethylene glycol, the heat storage and far infrared effects are further improved.

The invention relates to the technical field of electrochromic materials, in particular to a long-life electrochromic intelligent window and a preparation method thereof. Comprising a conductive substrate and an electrochromic device, the electrochromic device is arranged above the conductive substrate and comprises a transparent conductive film, an anode electrochromic film, a cathode electrochromic film and an electrolyte layer, and a plurality of layers of visible near-infrared anti-reflection infrared high-emission multilayer films are arranged above the electrochromic device. According to the structure, the optical regulation and control amplitude of the electrochromic device can be increased, visible infrared rays, near infrared rays and middle and far infrared rays are effectively blocked, the temperature of the colored electrochromic device is reduced, and the service life of the electrochromic intelligent window is prolonged.

1. The name of the product of this design: Smart scalp massage comb. 2. Purpose of the product with this appearance design: It has functions such as massage, microcurrent, essential oil conduction, far infrared light, etc., and can be used to comb hair and massage the scalp. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention provides an EMS pulse fatigue relieving instrument, and relates to the technical field of relieving instruments, the EMS pulse fatigue relieving instrument comprises a relieving instrument, the top of the relieving instrument is provided with a cover plate, both sides of the bottom of the cover plate are fixedly connected with fixing plates, and both sides of the fixing plates are provided with diversion trenches. A pull block is pulled outwards, the pull block drives a pull rod to move outwards, so that a clamping rod is driven by the pull rod to move outwards, the clamping rod moves along a transverse rod, meanwhile, a compression spring is compressed, when the clamping rod is separated from the interior of a clamping groove, a cover plate is opened, and then through the compression spring on the surface of an inclined rod, the inclined rod moves towards the top, so that the cover plate is opened. The lifting plate is pushed to the top, so that the cover plate is jacked up to the top, the cover plate is conveniently and efficiently opened, a 650mm and 850mm double-wave lamp is used, red light has the wavelength of 650mm, irradiates and penetrates through a corium layer, enhances cell activity and relieves muscular soreness, and far infrared light has the wavelength of 850mm, penetrates into subcutaneous tissues of a human body and promotes cell metabolism.

The invention discloses a magnetic infrared radiation heat dissipation material MnSe2, and a preparation method of the magnetic infrared radiation heat dissipation material MnSe2 comprises the following steps: 1) uniformly mixing manganese powder and selenium powder in proportion, and tabletting the obtained mixed powder to obtain a primary block 2) melting and quenching the obtained primary block under a vacuum condition; 3) grinding the quenched casting body, and tabletting to obtain a secondary block body; and 4) carrying out step-by-step melting annealing on the obtained secondary block under a vacuum condition, and then grinding to obtain the magnetic infrared radiation heat dissipation material MnSe2. Manganese powder and selenium powder are used as main raw materials, the melting quenching process and the step-by-step melting annealing process are combined, the infrared emissivity of the obtained MnSe2 material is promoted to be improved, and particularly, the high emissivity can be shown in the middle infrared band and the far infrared band; when the material is applied to preparation of a MnSe2 composite film, a good radiation refrigeration effect can be achieved, and the material has a good application prospect in the fields of thermal management of microelectronic devices and the like.

The invention discloses a graphene microcrystalline far-infrared electric heating plate and a preparation method thereof. The graphene microcrystalline far-infrared electric heating plate comprises a base layer, a functional layer arranged on the base layer and a microcrystalline glass layer covering the functional layer, the base layer is formed by compounding silicon nitride ceramic and boron carbide short fibers, the volume fraction of the boron carbide short fibers is 15%-20%, the bending strength is larger than or equal to 800 MPa, and the heat conductivity coefficient is 80-100 W / (m.K); and the functional layer comprises an electric conduction and heat conduction layer and a far infrared radiation layer. The graphene microcrystal far infrared electric heating plate adopts a multi-layer composite structure, a functional main body is formed by compounding a graphene nanosheet and a hexagonal boron nitride nanotube, the square resistance is less than or equal to 100 omega / square, the heat conductivity coefficient reaches 500-800 W / (m.K), 30-second rapid thermal response is realized, and the heating response speed is increased by more than 90% compared with that of a traditional resistance wire; the far infrared radiation layer is compounded with nano titanium dioxide through tourmaline, and can stably emit far infrared rays of 8-14 microns, the emissivity is greater than or equal to 88% and is far higher than that of a common material and is less than 70%, and the blood circulation and metabolism of a human body are effectively promoted.

The invention discloses a preparation method of a double warm-keeping fabric, which comprises the following steps: (1) adding light-absorbing heating particles into a spinning solution, and controlling the shape of a spinning head to enable spinning to form hollow heating yarns; (2) weaving the hollow heating yarns prepared in the step (1) to obtain the light-absorbing heating fabric; (3) adding far-infrared heating particles into the membrane material stock solution to prepare a far-infrared temperature rise membrane stock solution, and preparing a far-infrared temperature rise membrane by adopting a roller coating stretching process; and (4) preparing the light-absorbing and heating fabric prepared in the step (2) and the far infrared temperature rise film prepared in the step (3) in a dispensing bonding manner to obtain the double-warm-keeping fabric. The fabric prepared by the preparation method disclosed by the invention has double warm-keeping functions, and by optimizing the yarn structure of the fabric and selecting a specific functional material, the warm-keeping performance is enhanced, and a better warm-keeping effect and wearing experience are realized.

The invention relates to the field of fiber manufacturing, in particular to a magnetic far-infrared dual-response fiber and a preparation method thereof.The magnetic far-infrared dual-response fiber comprises a polymer matrix and a magnetic far-infrared composite material evenly distributed in the polymer matrix; the magnetic far-infrared composite material comprises a nano ferroferric oxide core body and a zirconium carbide coating layer coating the core body, the interior of the nano ferroferric oxide core is doped with transition metal elements, so that the Curie point temperature of the nano ferroferric oxide core is 40-50 DEG C, and the surface of the nano ferroferric oxide core is modified by a cationic surface active agent to form a positive charge layer; hydroxyl is grafted on the surface of the zirconium carbide material. The Curie temperature of ferroferric oxide is precisely regulated and controlled to range from 40 DEG C to 50 DEG C through transition metal doping, a magnetic-far infrared synergistic energy transfer channel is designed and constructed in combination with a core-shell structure, intelligent response with the far infrared emissivity larger than or equal to 0.90 is achieved under body temperature triggering, and the functional strength and large-scale production feasibility are both achieved.

The invention discloses a Cr < 3 + >-doped gallium germanate broadband near-infrared luminescent material as well as a preparation method and application thereof. The general chemical formula of the luminescent material is Y3ZnGa3-3xCr3xGeO12 (wherein 0 lt; x is smaller than or equal to 0.07), can be effectively excited by a light source of a blue light band or a red light band and emits high-brightness near-infrared light covering the range from far infrared to near infrared (600-1200 nm), and has high light-emitting quantum efficiency (gt; 95%) and excellent thermal stability (gt; 68% at 150 DEG C). The preparation process of the luminescent material is simple and environment-friendly, and the obtained product is stable in physical and chemical properties and pure in phase. In addition, by means of cosolvent doping, Cr < 3 + > ion doping concentration regulation and control and the like, effective regulation and control of luminous properties such as luminous intensity and emission peak position (770nm-830nm) of the luminescent material can be realized. The near-infrared light output power and the photoelectric conversion efficiency of a near-infrared LED light-emitting device formed by combining the light-emitting material and a commercial LED chip are relatively excellent, so that the near-infrared light-emitting device has wide application potential in the fields of night vision imaging, biomedical treatment, information anti-counterfeiting and the like.

The invention provides a middle and far infrared broadband metamaterial absorber and a design method thereof. The middle and far infrared broadband metamaterial absorber comprises metamaterial absorption units which are arranged in a periodic array mode. The whole metamaterial absorption unit is square and comprises a top metal layer, a dielectric layer and a bottom metal layer from top to bottom in sequence. The top metal layer is attached to the upper surface of the dielectric layer and is formed by arranging eight metal sheets according to a certain arrangement mode, namely a circular metal sheet which is arranged at the central position of the upper surface of the dielectric layer, and the center of the circular metal sheet is aligned with the center of the upper surface of the dielectric layer; three annular metal sheets concentric with the circular metal sheet surround the periphery of the circular metal sheet, and gaps exist between the circular metal sheet and the annular metal sheet on the innermost layer and between the annular metal sheets on the adjacent layers from inside to outside. And the four metal square sheets with the same size are respectively arranged at four corners of the upper surface of the dielectric layer. The absorption bandwidth is greatly prolonged, and perfect absorption of a target wave band can be infinitely approached by adjusting geometric parameters of the absorber.

The utility model relates to the technical field of reactor heating devices, and specifically to a far-infrared electric heating device for a reactor, comprising a reactor body and a far-infrared electric heating device arranged at the bottom of the reactor body, the far-infrared electric heating device comprising a heating device shell, a cavity is arranged between the heating device shell and the reactor body, an insulation layer and an electric heating element are arranged in sequence on the inner wall of the heating device shell in the cavity, a junction box is arranged on one side of the heating device shell, and an inflation interface and an exhaust interface connected to the cavity are respectively arranged on the other side of the heating device shell. The utility model adopts a positive pressure inflation structure to fill the cavity with inert gas, thereby preventing the electric heating element from oxidative denaturation, and filling the entire cavity with inert gas, which can squeeze out other gas media and improve safety.