174 results about "Silver film" patented technology

The invention relates to an optical fiber hydrogen sensor based on a silver film-nanowire hole array structure and a preparation method thereof in the field of photochemical sensors. The optical fiber hydrogen sensor comprises a multimode optical fiber, and a sensing area is formed on the multimode optical fiber; the sensing area is formed by stripping a coating layer with a preset length from the multimode optical fiber, thinning the optical fiber in the area, plating a silver film on the surface of the thinned optical fiber, and adsorbing a nanowire hole array structure which is sequentially and vertically arranged on the surface of the silver film in a liquid level self-assembly manner; the nanowire hole array is of a metal-medium-metal (MIM) structure, a gold-palladium nanowire array is arranged at the bottom, an intermediate medium layer is made of aluminum oxide, and a silver film with a hole array in any shape is arranged at the top. When light is transmitted to a sensing area from a fiber core of the multimode optical fiber, the light and a metal silver film can excite a surface plasmon resonance (SPR) effect, meanwhile, an MIM structure formed by a gold-palladium nanowire, an aluminum oxide dielectric layer and a porous silver film serves as an optical coupling antenna through a local surface plasmon resonance (LSPR) effect at the edge of a top hole, and the optical coupling antenna is used for transmitting the light to the sensing area. Light energy is efficiently converged and excited in an extremely bound gap plasmon (Gap Plasmon) in an aluminum oxide dielectric layer, so that far-unconventional electromagnetic field enhancement is generated in a sensing core area, and the sensitivity of the sensor is greatly improved.

A periscopic camera module disclosed by the present invention comprises a lens assembly, a motor assembly and an imaging module, the imaging module comprises an optical filter, a photosensitive chip and a circuit board, the periscopic camera module is characterized in that the periscopic camera module further comprises a reflector, the reflector is obliquely arranged behind the lens assembly, and a first preset angle is formed between the reflector and the optical axis of the lens; the imaging module is arranged in the reflecting light path direction of the reflecting mirror, the reflecting mirror comprises a substrate and a reflecting layer on the surface of the substrate, the reflecting layer can be configured to be a film coating medium, the film coating medium is an aluminum film or a silver film, the reflectivity of the film coating medium is larger than 95%, and the reflection bandwidth is the wavelength of 420-680 nm. According to the periscopic camera module provided by the invention, a prism can be replaced by the reflecting mirror, so that the module cost is reduced, and meanwhile, the effect of reducing the thickness of the module is achieved by utilizing the special angle arrangement of the reflecting mirror and the photosensitive chip.

The invention belongs to the technical field of optical fiber sensing, and particularly relates to a photonic crystal optical fiber sensor which is characterized in that a cladding material is silicon dioxide, a to-be-detected solution channel is formed in the cladding of an optical fiber, and a first inner-layer air hole and a second inner-layer air hole are formed outside the to-be-detected solution channel; the inner wall of the second inner layer air hole in the X-axis positive half axis direction is plated with a silver film, a plurality of outer layer air holes are formed in the outer portion of the second inner layer air hole, every two outer layer air holes form a group, and each group of air holes are evenly distributed in the circumferential direction. The aperture of the outer-layer air holes is larger than that of the first inner-layer air holes and that of the second inner-layer air holes; the number of the first inner layer air holes is 16, and the diameter of the first inner layer air holes is 1.5 mm; the number of the second inner layer air holes is 24, and the diameter of the second inner layer air holes is 1.5 mm. The number of the outer layer air holes is 16, and the diameter of the outer layer air holes is 2.5 mm. The diameter of the to-be-detected solution channel is 7.3 mm; and the thickness of the silver film is 40nm.

The invention discloses a polarization converter and a preparation method thereof. The polarization converter comprises a silicon dioxide substrate, a silicon core waveguide, a zinc oxide supporting layer, an asymmetric silver layer and a silicon dioxide substrate, the silicon core waveguide and the zinc oxide supporting layer are attached to the silicon dioxide substrate to form a substrate structure; the asymmetric silver layer is attached to the silicon dioxide substrate to form a silver film structure; the silver film structure is connected with the substrate structure through the zinc oxide supporting layer, and the asymmetric silver layer is located over the silicon core waveguide and does not make contact with the silicon core waveguide. Through a non-contact structure of the asymmetric silver layer and the silicon core waveguide, air is introduced as a low-refractive-index medium to construct a hollow mixed plasmon waveguide structure, so that the transmission loss is effectively reduced, and meanwhile, based on introduction of the asymmetric silver layer, the high integration level and the high conversion rate of the polarization converter are effectively guaranteed.

The invention discloses a preparation method of an integrated collector plate for a vanadium battery. The preparation method comprises the following steps: preparing foamed nickel deposited by carbon nanotubes; pressing the conductive particles into sheets, sequentially putting the conductive sheets, the modified foamed nickel and the conductive sheets into a mold, and integrally forming by using a hot press to obtain the composite bipolar plate. Silver-copper composite powder is prepared by plating silver on the surface of copper powder through chemical plating, conductive adhesive containing silver-copper metal powder is prepared, and a copper plate and a composite bipolar plate are bonded through the conductive adhesive to prepare the integrated collector plate. The foamed nickel is used as a framework material, the interface between the foamed nickel and the carbon composite layer is improved by depositing the carbon nanotubes on the surface of the foamed nickel, the mechanical strength and the conductivity of the composite bipolar plate are improved, nano-scale silver particles on the surface of the copper powder can be melted by performing heat treatment on the silver-copper composite powder, a continuous silver film is formed, and the conductivity of the composite bipolar plate is improved. The conductivity and oxidation resistance of the conductive adhesive are improved, and the contact resistance between the bipolar plate and a copper plate is reduced, so that the performance of the flow battery is improved.

The invention discloses a high-sensitivity SPR refractive index sensor with a sawtooth structure and a graphene-silver layer, and belongs to the technical field of sensors. A smooth prism surface is etched into a sawtooth shape, metal silver-two-dimensional nano material graphene is used as a plasma material to form silver layer-graphene, the plasma material contains silver, a silver film is covered with graphene, and the prism is etched into a sawtooth shape by optimizing the thickness of a sawtooth silver layer and the number of layers of black phosphorus. The thickness of a silver layer, the height of sawteeth and the number of layers of graphene are adjusted through the composite film plated with silver-graphene, and the prism with the sawteeth structure and the metal and two-dimensional nanometer material are provided. The average angle sensitivity of the sensor disclosed by the invention can reach 860.6 degrees / RIU in a refractive index range from 1.330 RIU to 1.335 RIU. Compared with a prism type surface plasmon resonance refractive index sensor reported in the past, the surface plasmon resonance refractive index sensor has higher angle sensitivity.

The invention discloses an optical fiber sensor and a preparation method thereof, and belongs to the technical field of optical fiber sensing, and the optical fiber sensor comprises an optical fiber body adopting a splicing structure of a single-mode optical fiber, a tapering coreless optical fiber and a single-mode optical fiber; the cascaded F-P structure comprises a sensing cavity and a reference cavity which are arranged on the tapering coreless optical fiber; the metal enhancement layer comprises a silver film and a gold nanorod array which are sequentially arranged on the surface of the tapering coreless optical fiber, the thickness of the silver film is 30-50 nm, the length-diameter ratio of gold nanorods is 3: 1-5: 1, and the diameter of the gold nanorods is 40-60 nm; the sensitive material coating comprises a polydimethylsiloxane (PDMS) film coated on the surface of the sensing cavity and a polyvinyl alcohol (PVA) film coated on the surface of the gold nanorod array, the thickness of the PDMS film is 3-7 microns, and the concentration of the PVA film is 2-4 wt%; according to the optical fiber sensor and the preparation method thereof provided by the invention, a synergistically enhanced sensing system is formed, and high sensitivity, amplification and multi-parameter detection capability are considered at the same time.

The invention discloses a metasurface based on a nano resonator and a design method for realizing wavelength classification deflection. The metasurface is formed by periodically arranging three unit silicon nano resonators, wherein the widths of middle layers of the unit silicon nano resonators change in a gradient mode along the x axis, and the metasurface is of the sub-wavelength scale. The substrate of the unit resonator is a silver substrate, the surface of the silver substrate is provided with a silicon nanometer strip, and the top of the silicon nanometer strip and the top of the silver substrate are respectively deposited and covered with a layer of silver film; by adjusting the thickness of the middle silicon layer of the resonator, the working wavelength of a near-infrared band can be regulated and controlled, normal incident y polarized light with a specific wavelength is deflected to a diffraction order, light with other wavelengths is vertically reflected, and meanwhile, a phase modulation function is achieved. The device has the remarkable advantages of simple structure and convenience in preparation, has the advantages of high throughput and large-area preparation, and has important application prospects in new technologies such as optical imaging, spectrum detection and machine vision.

The invention provides a probe type optical fiber SPR (Surface Plasmon Resonance) sensor system based on a microsphere structure. The probe type optical fiber SPR sensor is characterized in that the probe type optical fiber SPR sensor is composed of a broadband light source, a spectrograph, a broadband circulator and a microballoon structure probe type optical fiber SPR sensor, the microballoon structure probe type optical fiber SPR sensor is formed by welding a multimode optical fiber with a section of single-mode optical fiber, and the single-mode optical fiber at the welding position of the multimode optical fiber and the single-mode optical fiber is prepared into the microballoon structure; the nano-silver film is deposited on the surface of the single-mode optical fiber, the polydimethylsiloxane film and the polyvinyl alcohol film are coated section by section along the outer surface of the nano-silver film, and the nano-gold film is plated on the end face of the tail end, so that the temperature parameter and the humidity parameter can be simultaneously measured in various sensing application scenes. The device is simple in structure, flexible and compact, and can be widely applied to the optical fiber sensing application fields of chemistry, biology, medicine, life science and the like.

The invention discloses a surface plasmon resonance (SPR) hydrogen sensor based on an Ag / PDMS / Pt-WO3 multilayer structure. The SPR hydrogen sensor is characterized by comprising a halogen lamp light source, two sections of multimode optical fibers, a spectrometer and an SPR hydrogen sensing head, wherein the SPR hydrogen sensing head is composed of a different-core structure formed by multimode-single-mode-multimode optical fibers, a silver film, PDMS (polydimethylsiloxane) and Pt-WO3 (platinum-tungsten trioxide). The SPR hydrogen sensor based on the Ag / PDMS / Pt-WO3 multi-layer structure, which is simple to prepare, high in sensitivity and capable of being repeatedly used for a long time, is provided aiming at the defects that an existing optical fiber SPR hydrogen sensor is low in sensitivity and complex in device manufacturing, and PdH is changed from an alpha phase to a beta phase when Pd is used as a hydrogen sensitive material, so that the use of the device is influenced, and the like. When the hydrogen concentration is increased, the Pt-WO3 reacts with the hydrogen to generate heat, so that the refractive index of the PDMS film is changed, the SPR resonance spectrum is moved, and the hydrogen concentration is obtained by observing the offset of the PDMS film. The high refractive index sensitivity of SPR is brought into full play by utilizing the high refractive index change of PDMS, so that high-precision detection of hydrogen leakage is realized.

This invention belongs to the field of thermoelectric thin film technology, specifically relating to the preparation of a high-density domain-structured flexible silver telluride thin film and its reversible thermoelectric performance control method. The film possesses a high-density strip-like domain structure with numerous twins and stacking faults. The high-density domain boundaries provide a large number of ultra-highly active sites, allowing for wide-range reversible control of thermoelectric performance through simple post-processing methods, such as oxidation annealing, chemical and physical deposition of nano-metal particles. The high-density domain-structured silver telluride thin film prepared by this invention uses a silver film prepared by magnetron sputtering as a precursor, reacting it with tellurium vapor in a tube furnace to generate a dense thin film. The preparation method is simple, low-cost, highly reproducible, and operates at a low reaction temperature, making it suitable for large-scale preparation and compatible with flexible substrates such as polyimide. The high thermoelectric performance and reversible control characteristics of this film are of great significance for applications in high-performance flexible thermoelectric generators and multifunctional sensors.

The application discloses a kind of hypersensitive coupling bionic strain sensors and preparation method thereof, belong to the field of strain sensor.The specific method is through coupling bionic arthropod crack receptor and helical growth divergent law of sunflower seed, design coupling bionic strain sensor structure, prepare flexible elastic substrate with micro-nano coupling bionic crack array using replication transfer method, and carry out ion sputtering and plate a layer of nano silver film, obtain the resistance layer deposited on flexible elastic substrate and micro-nano coupling bionic crack array.Finally, copper wire electrode is packaged on the surface of resistance layer, and a kind of coupling bionic strain sensor is obtained, which not only has ultrahigh sensitivity, but also good durability, rapid response time and recovery time, simple structure, and excellent performance in all aspects.

A method for manufacturing a combined sintered-prepared silver film and a carrier (1), a) a step of creating a carrier (2) including a designed opening (5); b) a step of casting a silver film layer (7) into the designed opening (5), for example, a step of casting a silver paste; and c) a method comprising the step of drying the carrier (2) and the silver film layer (7) to form a combined sintered-prepared silver film and carrier (1). The carrier (2) may comprise a plastic carrier, which may be produced by permanently bonding two plastic films using a plasma bonding process or using a temperature-stable adhesive. The carrier (2) may comprise a stencil layer (3) and a backing layer (4). The stencil layer (3) may define a designed opening (5). The backing layer (4) may be configured to seal the bottom of the designed opening (5), wherein, at the beginning of step b), the top of the designed opening (5) may be open to receive a cast silver film layer (7). The combined sintered-prepared silver for the substrate (10) a) a step of positioning a combined sintered-prepared silver film and carrier (1) of the type comprising a carrier (2) including a designed opening (5) and a silver film layer (7) cast into the designed opening (5) on the upper surface of a substrate (10) such that the silver film layer (7) faces downward; b) a step of transferring a silver film layer (7) onto a substrate (10) by lamination; c) a step of removing the carrier (2) of the combined sintered-prepared silver film and the carrier (1); d) a step of forming an assembly by placing the component (22) on the substrate (10) so as to be in contact with the transferred silver film layer (7); and e) includes the step of sintering the assembly to create a silver bond between the component (22) and the substrate (10). In step b) of the method of assembling the component (22) to the substrate (10), lamination is performed using a lamination press (11+12) at a pressure of 3 to 8 MPa, optionally 3 to 6 MPa, optionally 8 MPa, and a temperature of 130 to 150°C, optionally 130°C. In step e) of this method, sintering is performed at a pressure of 10 MPa and a temperature of 250°C.

The invention relates to a transparent electrode for a deep ultraviolet LED and a preparation method thereof. The method comprises the following steps: depositing a silver film on a deep ultraviolet LED epitaxial structure; spin-coating a carbon nanotube suspension on the silver film; performing a first rapid annealing in an inert atmosphere after drying to form a silver / carbon nanotube composite structure consisting of carbon nanotubes and silver nanospheres attached to the carbon nanotube walls; depositing an aluminum oxide film layer on the silver / carbon nanotube composite structure; and performing a second rapid annealing in an inert atmosphere to form a transparent electrode of the silver / carbon nanotube / aluminum oxide composite structure. The transparent electrode has strong bonding strength and mechanical strength, and has good light transmittance and electrical conductivity.

The invention discloses a high-sensitivity photonic crystal fiber double-parameter sensor based on SPR effect, which comprises a substrate, a fiber core and a cladding are arranged on the substrate, two sides of the cladding are symmetrically and laterally polished to respectively form an upper polishing surface and a lower polishing surface, a plasmon material layer and a titanium dioxide layer are sequentially arranged on the upper polishing surface, and a high-sensitivity photonic crystal fiber is arranged on the lower polishing surface. A silver film layer is arranged on the lower polishing surface; a core air hole is formed in the center of the substrate, and outer-layer air holes which are arranged in a hexagonal structure by taking the core air hole as the center, middle-layer air holes which are arranged in a hexagonal structure by taking the core air hole as the center and inner-layer air holes which are arranged in a straight line are sequentially formed in the cladding outside the core air hole from outside to inside. According to the sensor disclosed by the invention, the air holes are specially arranged, so that the refractive index and the temperature can be synchronously detected, and the sensor has relatively high maximum wavelength sensitivity and quality factor.

The invention discloses antibacterial titanium dioxide with high temperature resistance and a preparation method. The titanium dioxide comprises a titanium dioxide base material, an inorganic coating layer coating the surface of the titanium dioxide base material and an organic coating layer coating the surface of the inorganic coating layer, the inorganic coating layer comprises a nano-silver film layer; the organic coating layer is a coating layer formed by introducing Ti-S bonds. The titanium dioxide is subjected to inorganic coating and organic modification treatment in sequence. A high-dispersion nano-silver film layer and a Ti-S bond are introduced, so that the titanium dioxide has excellent antibacterial property and temperature resistance, and the use requirements of the plastic industry are met.

Provided is a composition, including: (A) a compound represented by the following general formula (1); (B) a compound represented by the following general formula (2); and (C) a silver compound:where R1 and R2 each independently represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms;where R3 and R4 each independently represent a hydrogen atom, a sodium atom, a potassium atom, or an alkyl group having 1 to 5 carbon atoms, and “n” represents 1 or 2.

A kind of drug chiral detection device based on metal resonance optical fluid chip, including light source module, polarization control module, beam splitter, polarization conversion module, resonance optical fluid chip, polarization control module includes the quarter-wave plate and linear polaroid that are sequentially arranged along the direction of light path, one side of beam splitter is provided with first photoelectric detector, polarization conversion module includes two quarter-wave plates, resonance optical fluid chip includes the upper silver film layer and lower silver film layer that are arranged in parallel and the cavity layer formed between upper silver film layer and lower silver film layer, one side of resonance optical fluid chip is provided with second photoelectric detector.The metal resonance optical fluid chip of the present application combines polarization light modulation structure, realizes the high-precision detection of chiral drug, by optimizing the interaction of optical field and chiral medium, significantly improve the detection sensitivity, reduce sample demand, and realize high-throughput, integrated detection process.

The invention relates to a nano aerogel fabric compounded with a silver film and a preparation method of the nano aerogel fabric, and belongs to the technical field of textile fabric production, the fabric comprises base cloth and a functional silver film in parts by weight, the base cloth is obtained by blending cotton fibers, organic fibers and functional fibers, the functional silver film is formed on the base cloth after the base cloth is soaked in treating fluid B and dried, and the functional silver film is formed on the functional silver film after the functional silver film is dried. The functional fibers are carbon fibers with aerogel layers attached to the surfaces, the aerogel layers are formed by dipping the carbon fibers in treating fluid A and then conducting drying and calcination treatment, the treating fluid A is formed by mixing Zn / Fe co-doped TiO2 gel and methyl cellulose, and the treating fluid B is formed by mixing silver nitrate, an organic metal framework ZIF-8, a red moss extract and ethyl alcohol. According to the nano aerogel fabric compounded with the silver film and the preparation method of the nano aerogel fabric, part of functional fibers are blended in the base cloth, and then the functional silver film is compounded on the surface of the base cloth, so that the fabric has good antibacterial performance, anti-static performance and ultraviolet-proof performance at the same time.

The application discloses a light-emitting device and a display panel. The light-emitting device comprises an anode layer, a first light-emitting unit, an n-type charge generation layer, a silver film-electron transport material coordination layer, a silver film layer, a silver film-hole injection material coordination layer, a p-type charge generation layer, a second light-emitting unit and a cathode layer which are sequentially stacked. By arranging the silver film-electron transport material coordination layer and the silver film-hole injection material coordination layer on the two sides of the silver film layer, the silver aggregation is inhibited, most of the silver film layer is nano silver particles, the injection barrier of electrons is reduced, the performance of the light-emitting device is improved, the short circuit caused by silver migration is avoided, and the stability of the light-emitting device is improved.

Embodiments of the present disclosure include optical elements and methods of forming the same using light-based patterning in solidified molten halide material. Other embodiments include systems that include such optical elements. The light-based patterning may be performed, for example, by forming silver-comprising nanostructure inclusions in a solidified silver halide film using ultraviolet (UV) laser exposure.

The invention discloses a waterproof sensor with fine and large strain detection capability. The waterproof sensor sequentially comprises a protective layer, a silver film, a graphene film and a flexible base material from top to bottom, a micro-column structure is arranged on the flexible base material; the graphene film is sprayed on the flexible base material to cover the micro-column structure; the silver film is arranged on the surface of the graphene film in a magnetron sputtering mode to form a conducting layer, and the two sides of the silver film are connected with wires. And the protective layer is poured on the silver film. The sensor prepared by the invention has waterproof capability and fine and large strain detection capability, and can be better applied to human body vital sign monitoring.

The utility model discloses sunroof glass capable of being opened without a sunshade curtain, which comprises a sunroof frame (1), laminated glass (2) is arranged in the sunroof frame (1), the laminated glass (2) is divided into an outer sheet (21) positioned at the topmost layer and an inner sheet (22) positioned at the bottommost layer, a PVB (Polyvinyl Butyral) grey film (23) is arranged between the outer sheet (21) and the inner sheet (22), a silver-plated film (24) is arranged on the inner side of the outer sheet (21), the outer sheet (21) is white glass, and the outer sheet (21) is transparent glass. The inner sheet (22) is SG green glass, the silver-plated films (24) are arranged between the PVB grey films (23), and the number of the silver-plated films (24) is two; by cancelling a sunshade curtain assembly and changing the sunshade curtain assembly into laminated glass (2), an integral skylight assembly movement mechanism is counterfeited, the color of glass is changed, a coating process is added, and the light transmittance of a PVB film is changed, so that the requirements of shading and heat insulation functions after the sunshade curtain is cancelled are met, the weight of the whole automobile is reduced, the head space is increased, and the occurrence probability of product quality problems is reduced.

The invention relates to the technical field of conductive glass, in particular to high-transmittance ITO conductive glass and a preparation method thereof.The high-transmittance ITO conductive glass is prepared by firstly cleaning a glass substrate, then sputtering a first SiO2 film on the surface of the glass substrate through the magnetron sputtering technology and then sputtering an ITO film on the surface of the first SiO2 film; and sequentially sputtering a second SiO2 thin film, a first Ag thin film, a third SiO2 thin film, a second Ag thin film, a fourth SiO2 thin film, a third Ag thin film and a fifth SiO2 thin film on the surface of the ITO thin film to finally obtain the high-transmittance ITO conductive glass. The method is simple and convenient in process and high in controllability, the used materials are cheap and easy to obtain, and the method has a good industrial application prospect. In the constructed structure, SiO2 and ITO cooperate to form a three-layer antireflection film system, and the visible light transmittance of the composite film layer can be remarkably improved. Meanwhile, by introducing multiple layers of ultrathin silver (Ag) films into the top layer SiO2, a composite nano conductive path is formed, and effective cross-layer transmission of carriers can be realized, so that the surface layer SiO2 is endowed with good surface conductivity.

The utility model provides a kind of refractive index sensing device based on titanium dioxide nanopore array, it is related to micro-nano photoelectronic technical field, the device includes titanium dioxide substrate, the titanium dioxide substrate surface is equipped with the nanopore array of square periodic arrangement;Gold film layer, the gold film layer covers in nanopore side wall and hole bottom surface;Silver film layer, the silver film layer covers in the upper surface of the titanium dioxide substrate, and the silver film layer with the gold film layer is connected at the orifice edge of nanopore;Silica protective layer, the silica protective layer covers in the exposed surface of the gold film layer, silver film layer, forms the package protection of metal layer.The utility model improves sensitivity and quality factor, and with low-cost material and local coating reduces cost and simplifies structure, also rely on protective layer to enhance stability, realize high performance and economy compatibility.

The invention discloses a power module, a power supply circuit and a chip. The power module comprises a first metal-clad substrate and a second metal-clad substrate which are oppositely arranged, and the chip and an interconnection column which are located between the first metal-clad substrate and the second metal-clad substrate. The chip and the first metal-clad substrate are electrically connected by adopting sintering materials through pressure sintering, the joint reliability can be improved, and the chip is electrically connected with the second metal-clad substrate through the interconnection columns. As the substrates are arranged on the two sides of the chip, heat generated in the power module can be discharged from the two substrates, and the heat dissipation performance of the power module is improved. Besides, the sintering material formed by the silver paste, the copper paste or the silver film has the advantages of low sintering temperature, high melting point and high thermal conductivity, so that the heat dissipation performance of the power module can be further improved, and the power density of the power module is improved.

The invention discloses a package for a plurality of power semiconductor elements for a double-sided water-cooled power module, the double-sided water-cooled power module mainly comprises a heat dissipation housing and a power semiconductor element package, the heat dissipation housing comprises an upper heat conduction cover and a lower heat conduction cover, and liquid cooling pipes are respectively formed on the upper heat conduction cover and the lower heat conduction cover; the power semiconductor element package is composed of a ceramic main board, an upper copper guide column, a ceramic cover plate, a shunting column and a resin insulation package, the power semiconductor element is connected with the ceramic main board in a pressing mode through a silver thin film layer, and the upper copper guide column is welded to the power semiconductor element in a pressing mode through an interface silver film to complete a conductive loop. Meanwhile, the heat dissipation shell is matched to achieve the effect of double-sided heat dissipation; in addition, the liquid cooling pipes formed in the upper heat conduction cover and the lower heat conduction cover respectively achieve double-sided heat conduction elimination, so that the heat dissipation effect of the whole power semiconductor element is improved.

The present invention relates to an optical fiber sensor for detecting lead ions in industrial wastewater from battery production, which is composed of a multimode optical fiber, a coreless optical fiber, a microsphere, a chromium film, a silver film, and a modified chitosan film. The end face of the coreless optical fiber is processed into a microsphere shape, and the surface of the coreless optical fiber is successively coated with a chromium film, a silver film, and a modified chitosan film to form an optical fiber cladding. The present invention utilizes the adsorption of lead ions in industrial wastewater from battery production by the modified chitosan film, which causes a change in the refractive index of the modified chitosan film layer, and further leads to a change in the wavelength of the SPR signal loss peak. By analyzing the wavelength of the SPR signal, the detection of lead ion concentration is realized, meeting the actual requirements for the detection of heavy metal ions. The preparation method of the present invention uses simple equipment, steps, and processes, can effectively excite the SPR signal, realize the high-sensitivity and high-precision detection of lead ions, and effectively evaluate the pollution situation of lead ions in industrial wastewater from battery production.

The invention discloses a hairtail body surface silver film fresh-keeping spraying machine and belongs to the technical field of aquatic product treatment.The spraying machine comprises a spraying plate, a spraying assembly is arranged above the spraying plate, the spraying plate is obliquely arranged, a filtering assembly is arranged below the spraying plate, the filtering assembly comprises a collecting box with an opening in the upper portion, and a filtering box is arranged below the collecting box; an outlet of the collecting box is connected with a feeding pipe on the filtering box through a first conveying pipe, one end of the feeding pipe is arranged in the filtering box, the other end of the feeding pipe is arranged outside the filtering box, an inner barrel with filtering holes is arranged in the filtering box, an outlet of the feeding pipe is located on the inner side of the inner barrel, and a driving motor connected with the inner barrel is arranged outside the filtering box. The spraying machine can adapt to the slender body shape of the hairtail, lossless protection of a silver film is achieved, the preservative is evenly sprayed at low cost, and the fresh keeping processing cost of the hairtail is reduced.

The invention discloses a preparation process of double-silver coated glass, and relates to the technical field of glass coating. The preparation process of the double-silver coated glass comprises the following steps: step 1, placing a glass substrate on an objective table, and conveying the glass substrate to a feeding hole of a composite coating cavity; 2, enabling the objective table and the glass substrate to pass through a composite coating cavity in the vertical direction, and coating a plurality of film layers to form a composite film layer; 3, the glass substrate is sent out from the discharging port and conveyed to the feeding port through a first conveying device, and the objective table is sent away from the discharging port and conveyed to the feeding port through a second conveying device; and 4, repeating the step 2 to form a group of composite film layers on the surfaces of the composite film layers again. By designing the composite film layer with the silver layer and enabling the glass substrate to pass through the same composite film coating cavity twice to finish double-silver-layer plating, two groups of independent composite film coating cavities do not need to be independently arranged for the double-layer silver film, so that the overall occupied area of equipment is remarkably reduced, and the capital construction investment and the production site cost are reduced.