556 results about "Far infrared" patented technology

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 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 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 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 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.

The invention belongs to the technical field of textile materials, and relates to an environment-adaptive multi-spectrum camouflage cloak and a preparation method thereof. Comprising a cloak body, the cloak body is made of composite fabric, the composite fabric sequentially comprises a wear-resistant layer, a waterproof layer and a close-fitting layer from outside to inside, and the surface of the wear-resistant layer is sequentially coated with a thermochromic dye layer, a far infrared plating layer and a visible light hiding layer from bottom to top; the thermochromic dye layer is formed by compounding disperse dye and bistable thermochromic microcapsules, and the visible light stealth layer is prepared from photonic crystal gel; and the far infrared plating layer is prepared from an indium tin oxide film. The desert camouflage is switched below 5 DEG C, the woodland camouflage is switched above 60 DEG C, and different regional environments are matched; according to efficient multi-spectrum camouflage, the color difference between the visible light band and the background is smaller than or equal to 1.95, three emissivity levels are formed in the infrared band, and the thermal imaging detection probability is reduced.

The invention provides an automobile skylight full-shading roller shutter composite fabric with a nine-functional-layer structure, and relates to the technical field of automobile textiles. The nine-functional-layer structure sequentially comprises a graphene far infrared emission yarn layer, a connection yarn layer, a rare earth far infrared absorption heating yarn layer, a first PUR connection point layer, a first aluminized heat reflection layer, a film layer, a second aluminized heat reflection layer, a second PUR connection point layer and an interior fabric layer from top to bottom. The woven fabric with the radiation cooling function and the composite fabric of the nine functional layers of the woven fabric have the capability of reversely emitting sunlight heat penetrating through skylight glass on the top of an automobile to the atmosphere outside the automobile and even the outer space through the skylight glass through absorption reflection and infrared radiation; and the aluminum-plated layer on the lower layer of the film can reduce the cold loss of a passenger compartment. The functions of cooling, heat insulation, cold insulation, shading, beautification and decoration of the nine-layer composite skylight roller shutter fabric for the vehicle are achieved through the effects of absorption, reflection and anti-radiation of infrared rays.

The utility model discloses a self-heating sneaker, which relates to the technical field of sneakers and comprises a sneaker body and an inner cavity, a sole is connected below the sneaker body, a toe cap is arranged at one end of the sole, and a heel is arranged at the other end of the sole. According to the self-heating sports shoes, the first heating plush made of far infrared radiation acrylic fibers can keep the feet warm, the far infrared radiation acrylic fibers are made of materials obtained by adding far infrared radiation ceramic particles into acrylic fibers, heat of the human body and heat of the surrounding environment can be absorbed to keep the feet warm, the temperature is moderate, and the health care effect is good. Meanwhile, the heat of the first heating plush can be transferred into the second heating plush through the interlayer, double-layer heat preservation is provided, then the contact face between the first heating plush and the surrounding environment and the contact face between the second heating plush and the surrounding environment are improved through the breathable layer, the breathability is improved, stuffy sweat is not prone to occurring, and the comfort and the heat preservation performance of the sports shoes are improved.

The application discloses a composite patch for promoting hair growth, a hair growth cap and a preparation method. The composite patch for promoting hair growth comprises the following raw materials in parts by weight: medical grade liquid silicone 40-60 parts, gelatin 20-35 parts, silane coupling agent 1-2 parts, far infrared ceramic powder 1-2 parts, tourmaline powder 1-2 parts, chisel stone powder 0.5-1.5 parts and neodymium-iron-boron magnetic powder 4-6 parts. The composite patch for promoting hair growth is prepared by selecting the raw materials, so that the composite patch has the functions of radiating far infrared, generating a micro electric field and a magnetic field and having weak negative electric characteristics at the interface to improve the directional migration of calcium ions, thereby achieving the purposes of improving the micro environment of hair follicles and promoting hair growth.

The invention relates to the technical field of textile materials, in particular to a thermal imaging and far infrared prevention fabric and a preparation method thereof.The fabric comprises a three-layer structure, the first layer is a base material bottom layer, the second layer is a reinforcing framework layer, and the third layer is a low-emissivity surface layer; the base material bottom layer comprises modified aramid fiber, the two sides of the modified aramid fiber are coated with low-emissivity slurry, and the low-emissivity slurry comprises nickel micro powder modified resin; the reinforced skeleton layer comprises a carbon fiber yarn and pre-oxidized fiber blend, and a conductive layer is attached to the surface of the carbon fiber yarn; the low-emissivity surface layer comprises nickel micro powder modified resin and ceramic micro powder. The preparation method of the fabric comprises the following steps: modifying the aramid fibers, pretreating the carbon fibers and the pre-oxidized fibers, coating by using low-emissivity slurry, bonding, and then carrying out hot press molding. The fabric can reflect 90% of radiant heat, and the emissivity lt of the spectrum at the wave band of 8-14 microns is achieved; the cable has excellent thermal imaging and far infrared prevention functions, has a flame retardant grade V0, and is suitable for various civil scenes.

The invention relates to the technical field of installation and debugging of optical elements, and particularly discloses a far infrared beam splitting lens bracket and an optical path debugging method. The far infrared beam splitting lens frame comprises a mounting frame used for mounting an optical lens; the mounting frame is connected to the spectacle frame main body; the adjusting module comprises at least three adjusting pieces and at least one locking piece; the adjusting piece is fixedly arranged on the spectacle frame main body, and the end part of the adjusting piece is used for contacting and defining an optical working surface of a lens mounted on the mounting frame; the locking piece is arranged on the spectacle frame main body and is used for applying an elastic force acting on the back surface of the lens to the mounting frame. According to the optical path debugging method, a far infrared beam splitting lens frame is used. Therefore, the problem that the optical path debugging cannot be effectively solved in the prior art is effectively solved.

The invention relates to the technical field of electrothermal film preparation, in particular to an electrothermal film energy-saving heating method and system based on far infrared radiation, and the method comprises the steps: obtaining a plurality of historical electrothermal films and a current slurry feature group according to a current slurry component set and a storage electrothermal film set, and obtaining an original solid content data set of the historical electrothermal film set, obtaining a training feature data set based on the current feature parameter set and the original solid content data set, training a neural network by using the training feature data set to obtain a solid content selection model, and inputting the current feature parameter set into the solid content selection model to obtain an optimal solid content. And preparing current coating slurry based on the optimal solid content and the current slurry component set, preparing a coating base material according to the current coating slurry, and heating and drying the coating base material by using a multi-section temperature zone drying furnace to obtain the radiation layer film material. The coating efficiency in the electrothermal film preparation process can be improved, and the energy consumption in the drying process can be reduced.

The application discloses an oxyacetylene torch operation intelligent monitoring system and method, which comprises the following steps: 1, real-time image acquisition of the monitoring area is carried out through an information acquisition subprogram; then, data preprocessing is carried out through a data processing subprogram, and a target detection algorithm YoloV5 is used to identify and locate the target in the image; 2, the relationship between the specific target relative positions in the visible light image and the far infrared image is detected through a flame detection subprogram, a high-temperature area without visible fire or a flame area is judged and analyzed on site, and oxyacetylene flame and fire flame are distinguished; 3, the real-time state of the monitoring area is fed back through a result output subprogram, and the monitoring result is output. The application improves the monitoring accuracy, does not need supervision, and improves the safety of the torch operation.

1. The name of the design product: electric heater (rotary wind curtain graphene far infrared wind warming type A). 2. The use of the design product: for indoor heating. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention discloses a method for manufacturing cookware with a function of releasing far infrared rays by heating, and relates to the field of marmite manufacturing, which comprises the following steps: S1, preparing pug: preparing argil, kaolin, quartz and pre-sintered argil particles, and mixing the raw materials in proportion, S2, adding carbon powder: preparing carbon powder, and carrying out granularity sorting on the carbon powder by using a screen, the ceramic pug is pumped into a spray drying tower, slurry liquid drops are dried through hot air, S4, trimming and firing are conducted, specifically, the earthen pot prototype is dried, bound water contained in the earthen pot prototype is removed, trimming and glaze spraying are conducted on the surface of the earthen pot, and finally the earthen pot prototype is sent into a kiln to be subjected to vacuum firing; according to the device, the carbon powder is added on the basis of a traditional argil raw material, the carbon powder can serve as a conducting medium, the pot body can generate induction current to generate heat, the device can be directly applied to an induction cooker, far infrared rays can be released after heating, and the more uniform and faster heating effect is achieved.

The invention discloses an energy-absorbing stone and a preparation method thereof, and relates to the technical field of life cultivation and health preservation. According to the technical key points, three raw materials including coconut shell activated carbon powder, A900 type aluminate cement and natural dark jade powder are precisely selected, and the purity, the particle size, the water content and the volume ratio of each raw material are strictly controlled, so that the synergistic interaction of the functions of the raw materials is realized; wherein the large specific surface area characteristic of the coconut shell activated carbon powder guarantees the adsorption performance, the auxiliary energy storage effect of the natural dark jade powder stabilizes the release of far infrared rays, and the excellent curing performance of the A900 type aluminate cement guarantees the structural compactness; the problems that in the prior art, raw materials are single in function and poor in synergism are solved, the far infrared ray release wavelength of a finished product is precisely locked to the human body adaptive wave band of 5-15 micrometers, the energy penetration depth reaches subcutaneous 20 mm, the adsorption value is larger than or equal to 100 mg / g, meanwhile, no harmful components are separated out, and the effectiveness and use safety of the health preserving function are guaranteed from the source.

The present application suitably suppresses reflection of far infrared rays and suitably forms an antireflection film. A far infrared ray transmitting member (20) has a substrate (30) that transmits far infrared rays and a functional film (32) formed on the substrate (30) and containing a low refractive index layer (34) that has an oxide as a main component and has a refractive index of 1.5 or less for light of a wavelength of 10 μm, the low refractive index layer (34) having MgO as a main component, and the content ratio of MgO being 50 mass% or more and 100 mass% or less with respect to the entirety of the low refractive index layer (34).

1. The name of the design product: indoor sauna room. 2. The use of the design product: through the far infrared heating plate to raise the temperature, promote the body to sweat. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective drawing.

The invention discloses a preparation method of a low-temperature fired infrared porous ceramic plate. The preparation method comprises the following steps: (1) preparing composite oxide powder; (2) preparing coating powder; (3) soaking the coated powder in an aqueous solution of lithium acetate, filtering, drying and calcining to obtain modified powder; and (4) uniformly mixing celsian powder, quartz powder, barium aluminum silicate powder, the composite oxide powder, the modified powder and sodium tripolyphosphate to obtain mixed powder, adding water to adjust the water content, pressing into a plate blank, drying, calcining, and cooling along with a furnace to obtain the infrared porous ceramic plate. The ceramic plate prepared by the method has good far infrared ray emissivity and strength, the application performance of the ceramic material in the aspects of decoration, heat preservation, air purification and the like is improved, and the durability of the ceramic is improved.

The utility model discloses a kind of baking tray structures of far infrared heating, by setting pitch adjustment mounting structure, the height of food material placing plate relative to lower far infrared heating film can be conveniently, accurately manually adjusted, the defect of fixed heating distance in background art is effectively solved, the utilization efficiency of far infrared radiation energy is significantly improved, the risk that oil, juice and the like liquid directly overflow from food material placing plate edge into baking tray internal cavity in cooking process is reduced by the overflow groove set, and the heat dissipation efficiency of entire baking tray under long time, high load working condition is improved by specially-designed bottom heat dissipation structure.

1. The name of the design product: far infrared magnetoelectric pulse therapeutic instrument (Z). 2. The use of the design product: for far infrared magnetoelectric pulse therapy. 3. The design points of the design product: in the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view.

The utility model discloses a far-infrared ceramic bead muscle massage patch for relieving temporomandibular joint disorder, which belongs to the technical field of medical health care products and comprises two connecting sections and a massage section, each of the connecting sections and the massage section comprises an outer layer and an inner layer, two massage gel layers are arranged inside the inner layers, and the outer layer and the inner layer are respectively provided with a far-infrared ceramic bead muscle massage patch for relieving temporomandibular joint disorder. A far-infrared ceramic bead layer is arranged between the massage gel layers, connecting cloth is arranged on the top of the massage section, a hook-and-loop fastener is arranged between the connecting cloth and the massage section, a mounting through hole is formed in the middle of the connecting cloth, a positioning frame is arranged at the mounting through hole, and the positioning frame is connected with the massage section. Positioning columns are arranged at the positions, close to the corners, of the positioning frame, disposable diaphragms are arranged on the positioning beads, and positioning holes are formed in the disposable diaphragms. According to the temporomandibular joint massager, the temporomandibular joint can be conveniently and rapidly massaged through matched use of the massage section and other components, so that the temporomandibular joint can be relaxed and relaxed.

The utility model provides a kind of heater for sauna room, belong to sauna room technical field, including sauna room and the heating assembly installed in sauna room, heating assembly includes fixed column, stool body, gear ring and far infrared heating arc plate, fixed column is fixedly arranged in the inside center of sauna room, the inside fixed mounting of fixed column's upper surface is equipped with stool body, the outside surface of fixed column is rotationally provided with gear ring by bearing, far infrared heating arc plate is installed on gear ring, sauna room is additionally equipped with the drive assembly of driving gear ring to and fro rotation and far infrared heating arc plate up and down movement;The utility model is provided with far infrared heating arc plate, in the process of sauna, user enters far infrared heating arc plate by the opening outside far infrared heating arc plate and sits on stool body, far infrared heating arc plate emits infrared, infrared is irradiated on user's body from the periphery of user, realize the effect of heating sauna to human body, heating is rapid and uniform, increase work efficiency.

This utility model discloses a non-contact pipe hot melt welding machine, including a base. A far-infrared heating plate is fixedly installed on the upper surface of the base. A fixing column is also fixedly installed on the upper surface of the base. An mounting ring is rotatably installed above the fixing column. A fixing disc is rotatably installed inside the mounting ring. A first ventilation ring pipe and a second ventilation ring pipe are fixedly installed on the outer surface of the fixing disc. The diameter of the second ventilation ring pipe is larger than that of the first ventilation ring pipe. A grinding zone is formed between the first and second ventilation ring pipes. Multiple second spring grinding blocks are fixedly installed on the outer surface of the first ventilation ring pipe, and multiple first spring grinding blocks are fixedly installed on the inner surface of the second ventilation ring pipe. Through the setting of the fixing disc, grinding zone, first spring grinding blocks, and second spring grinding blocks, the end face of the pipe is ground, removing the oxide layer and contaminants from the end face, reducing the bonding strength, and simultaneously improving the flatness of the pipe end face, greatly improving the welding quality.

The far infrared floor heating mat based on the graphene electrothermal film comprises a surface layer and a heating assembly, a first hook-and-loop fastener is arranged on the lower side face of the surface layer, the heating assembly comprises a heating device, a second hook-and-loop fastener is arranged on the surface of the heating device, and the second hook-and-loop fastener is connected with the first hook-and-loop fastener in an adhesive mode; according to the electric floor heating mat, the surface layer and the heating assembly which are detachably connected are arranged, the surface layer can be detached according to requirements and soaked and tanned, and the current situation that the surface of an existing electric floor heating mat is inconvenient to clean due to the fact that the existing electric floor heating mat is integrally arranged is changed.

The application provides a high-thermal-conductivity radiation refrigeration coating for a 5G communication base station cabinet and a preparation method thereof, and belongs to the technical field of coatings. A SiC@BN / TiB2 three-phase fiber framework obtained through three-stage calcination is bonded with methylphenyl silicone resin through a silane coupling agent to form a longitudinal high-speed thermal conduction framework. Starburst calcium titanate and edge in-situ magnesium fluoride form a refractive index ladder and a rough multi-faceted structure, which not only reflects ultraviolet-near infrared light, but also endows weather resistance. Holmium / ytterbium co-doped calcium fluoride nanosheets are transversely overlapped to scatter near infrared light and convert the near infrared light into medium-far infrared radiation which can penetrate the atmospheric window, thereby further dissipating heat. Through mutual cooperation of a longitudinal continuous heat conduction path, a transverse heat dissipation network, optical multiple scattering and energy downshift radiation, stable chemical bond network support is achieved to realize high-efficiency, long-term reliable heat dissipation performance.

The present application relates to the technical field of biochip, in particular to a multi-waveband synergic release permeation-quantitative biochip, which comprises a substrate, a permeation function layer and a gold plating layer stacked from bottom to top; the substrate is made of graphene material with a thickness of 0.05-0.1mm, used for receiving and storing environmental energy; the permeation function layer has a thickness of 0.1-0.3mm, which is made of a mixture of nano far infrared powder, anion powder, magnetic powder and nano catalytic material with a mass ratio of 3:2:2:1, and then compounded with a biocompatible adhesive; the present application simultaneously releases magnetic wave, far infrared wave, anion wave and quantitative wave, and has the dual functions of human physiotherapy and material purification, solves the problem of single function of the existing products, the energy storage capacity of the graphene substrate and the energy aggregation effect of the gold plating layer greatly improve the energy utilization efficiency, prolong the chip action time, the permeation technology strengthens the waveband penetration capacity, and when acting on the human body, it does not need to be pasted on the skin, and when acting on the material, it does not need to be soaked, and the use scene is flexible.

The invention discloses a high-performance low-expansion heat-resistant purple sand tea set with a far infrared radiation function, and belongs to the technical field of ceramic tea sets, the tea set adopts an inner-outer double-layer composite structure, the inner layer is a low-expansion enhancement layer, and raw materials comprise 58-73% of purple sand raw ore, 2-3% of rare earth, 10-20% of surface hydroxylation cordierite micro powder, 5-15% of mullite particles and 2-5% of a sintering aid; the outer layer is a far infrared radiation functional layer and comprises the following raw materials: 30-40% of far infrared radiation powder, 30-40% of purple sand fine powder and 10-15% of a high-temperature binder; a quartz sand transition layer is arranged between the inner and outer layers. According to the high-performance low-expansion heat-resistant purple sand tea set with the far infrared radiation function, through the inner layer hydroxylation cordierite micro powder modification technology, the interface bonding strength of cordierite and a purple sand matrix is improved, and the framework supporting effect of mullite particles is matched, so that the thermal expansion coefficient of the inner layer is reduced, and the thermal shock resistance is improved; the problem of temperature difference cracking is solved.