114results about How to "Reduce loss value" patented technology

The invention relates to a soft magnetic core used for a high-power inverter power supply, and a manufacturing method thereof. The magnetic core is made of an Fe-based amorphous nano-crystalline belt material through winding , and comprises components according to weight percentages as follows: 81%-85% of Fe, 0.01%-5% of Co, 7%-9% of Si, 1.5%-2.5% of B, 1%-2% of Cu, 4%-7% of M, and 0.001%-0.04% of M', wherein M is one or more of Nb, Mo, V, W and Ta, and M' is at least one of Al and Ti. The magnetic core is subjected to anneal in a protective atmosphere or a vacuum; when in anneal, the position of the magnetic core in a furnace is movable or rotatable, a holding temperature is 520-600 DEG C, the holding time is 1-2 hours, and a temperature rise speed is 100 DEG C per hour. The magnetic core manufactured by adopting the method has lower loss, better manufacturing technique properties, and good soft magnetic characteristics; moreover, the downstream processing after the heat treatment is applicable to various technique methods.

The invention discloses a traditional Chinese medicine health consultation text named entity recognition method based on transfer learning, which comprises the following steps: S1, selecting a text named entity recognition annotation data set in other fields, constructing a neural network, and performing pre-training; S2, respectively constructing a one-way recurrent neural network, and performinglanguage model training by utilizing the traditional Chinese medicine health consultation text unlabeled data set to obtain a forward language model and a reverse language model. And S3, fusing the loop network layer output characteristics of the unidirectional language model, and combining the full connection network layer and the conditional random field layer to obtain a final named entity recognition model. And S4, naming the entity by using the traditional Chinese medicine health consultation text to identify the labeled data set, and carrying out fine tuning training. According to the method, named entities in other fields can be migrated to identify labeled text knowledge and unlabeled text knowledge in the field, so that the identification accuracy and recall rate of the named entities of the traditional Chinese medicine health consultation text are effectively improved, and the convergence speed of the model is increased.

The invention relates to high-saturation flux density composite magnetic powder. The high-saturation flux density composite magnetic powder is prepared from powder A and powder B, wherein the proportion is as follows: 5-95wt% of powder A and 5-95wt% of powder B, the powder A is at least one of iron silicon powder, pure iron powder, iron silicon aluminum power, iron nickel powder, iron nickel molybdenum powder and iron cobalt alloy powder, the powder B is at least one of iron-based amorphous alloy powder, iron-based nanocrystal alloy powder, iron-nickel-based amorphous alloy powder, iron-cobalt-based amorphous alloy powder and iron-cobalt-based nanocrystal alloy powder, and the grain sizes of the powder A and the powder B are 8-200 micrometers. A magnetic core prepared by employing the composite magnetic powder has the characteristics of high Bs, low loss, low cost and the like and is suitable for mass production, the Bs value is 1.71T or above, the loss is not higher than 50W / kg under 1.5T and 1,000Hz, and the magnetic core particularly and suitably works in a medium- and low-frequency range (50Hz-10kHz).

The invention discloses a mask plate for evaporation. The mask plate is characterized by including a first region and second regions. Specifically, the first region corresponds to a display area, the second region corresponds to transition areas, and the second regions are arranged on the left side and right side of the first region. The first region is equipped with a plurality of horizontally parallel slits, the second regions are provided with at least one row of holes, and rib support members are disposed between the adjacent holes in each row of holes. The mask plate for evaporation provided by the invention has better tension transition and balance effects, and the risk of edge color mixing occurring during evaporation in the display area can be reduced. In addition, compared with the prior art, the mask plate occupies less space and realizes frame narrowing in space. The design can also reduce the manufacturing difficulty of the mask plate and lower the cost of the mask plate.

The invention discloses a preparation method of a nanometer crystal magnetic powder core with a magnetic conductivity mumof 60. The method comprises the following steps: thermally treating an iron-based amorphous thin ribbon prepared by a rapid cooling method into a nano-crystalline ribbon, wherein the iron-based amorphous thin ribbon has the following components by weight: 3-15% of Ni, 1-10% of Si, 1-4% of B, 1-9% of Al and the balance of Fe; crushing the nano-crystalline ribbon to obtain nano-crystalline metal powders; conducting ball-milling and shaping the nano-crystalline metal powders; screening the nano-crystalline metal powders, and mixing the nano-crystalline metal powders into powder particle consisting of 90%-98% of first powder screened by a -200-mesh sieve and 2%-10% of second powder screened by a (-150)-(+200)-mesh sieve for distribution; mixing the mixed nano-crystalline metal powders with a bonding agent, and pressing to form the magnetic core; and annealing the formed magnetic core, and then, coating the magnetic core with insulating resin. According to the technical scheme, the magnetic powder core has stable magnetic conductivity, a loss value and direct-current bias ability.

The invention discloses a manufacturing method for a full optical fiber high-pressure gas chamber based on a hollow-core photon crystal fiber. The steps of the invention are as follows: a) two ends of a hollow-core photon crystal fiber (1) are respectively communicated with an airtight A chamber (2) and an airtight B chamber (3), and one end of gas distribution equipment (4) is communicated with the airtight B chamber (3), and the other end of the gas distribution equipment (4) is respectively connected with a vacuum pump (5) and a gas source (6) to be inflated; b) the airtight B chamber (3) is connected with the vacuum pump (5) through the gas distribution equipment (4) first, after the required vacuum degree is achieved, the airtight B chamber (3) is connected with the gas source (6) to be inflated again through the gas distribution equipment (4) until air pressure of the airtight A chamber (2) is more than or equal to one atmospheric pressure; c)the two ends of the hollow-core photon crystal fiber (1) are successively welded with a standard single film fiber (10) within a range of less than or equal to 1.5 min; d) a distillation function p(x) of air pressure of a fiber core in the hollow-core photon crystal fiber (1) is derived from a formula p(x)=p(1)(-c+a2-bx); e) a final air pressure value of the full optical fiber high-pressure gas chamber is calculated by more than one p(x). The p(x) can accurately determine the air pressure value of the full optical fiber high-pressure gas chamber.

The invention discloses an industrial production process target data prediction method of a multi-feature fusion deep neural network. Collecting other variable time sequence data related to the key variable in the industrial equipment through equal-interval sampling by utilizing a sensor, and performing predictive analysis on the time sequence data of the key variable in the process industry; inputting into a pre-designed and pre-constructed deep convolutional neural network for training; segmenting historical data of the key variables according to time steps and then inputting the segmented historical data into a deep gated recurrent neural network for learning; a multi-feature fusion method is utilized to fuse output features obtained by two networks and then input the output features into a full connection layer, network parameters are optimized through back propagation, and prediction precision is improved. According to the method, reliable and effective target variable parameter prediction is provided for process monitoring in industrial production, and the hysteresis quality of measurement of key variables such as the silicon content of molten iron in industrial production isrelieved.

This invention refers to a hydraulic or pneumatic machine with tilting blades, running either as an engine on a fluid flow or on pressure fluid or as a pump or a compressor. The hydraulic or pneumatic machine on a fluid flow according to the invention consists of a cylindrical casing with inlet and outlet openings, radially arranged, diametrically oposed, along the fluid flowing direction, some disk like rotors with tilting blades, hinged over their front faces and provided with driving mechanisms of their own, and some fixed drums located between the rotors, concentrically to them, making inside the machine some channels, symetrically arranged on one or several stages. Flowing through the channels, the fluid drives the tilting blades causing the movement of the rotors, all the rotors moving to one sense being coupled to the same outlet shaft of the machine. The tilting blades of the hydraulic or pneumatic machine operating according to the invention with pressure fluid, run in variable depth grooves located in the rings between the front faces of the rotors and connected to the fluid circuit, the operation conditions of the machine—motor or pump—being determined by the moving sense of the blade in the groove.

The present invention discloses a halogen-free epoxy resin composition having low dielectric loss, comprises: (A) 100 parts by weight of an epoxy resin; (B) 10-30 parts by weight of a DOPO modified curing agent; (C) 1-10 parts by weight of benzoxazine resin; (D) 60-90 parts by weight of an active ester compound; (E) 20-50 parts by weight of a flame retardant; and (F) 0.5-10 parts by weight of a curing accelerator. The halogen-free epoxy resin composition uses active ester as a curing agent of the epoxy resin to ensure that the hardening product has characteristics such as low dielectric constant (Dk), low dielectric loss (Df), high heat resistance, low water absorption, flame retardant and halogen-free. The halogen-free epoxy resin composition of the present invention is used for manufacturing semi-cured prepregs or resin-coated films, and is applied toward manufacturing metal clad laminates and printed circuit boards.

The invention discloses a method for identifying the grade of wood for a Chinese zither panel through the near infrared spectrum based on a neural network. The method comprises the steps of: (1), performing Savitzky-Golay convolution smoothing, first-order derivative pre-processing and principal component analysis on near infrared spectrum data including the wood for the Chinese zither panel in different grades; (2), constructing an improved BP neural network model; (3), training the improved BP neural network model; and (4), classifying the near infrared spectrum data of the wood for the Chinese zither panel by utilizing the trained improved BP neural network model, so that grade identification of the wood for the Chinese zither panel is realized. According to the method in the invention,judgement is carried out based on the near infrared spectrum data covering chemical substances of the wood for the Chinese zither panel in different grades; data measurement is rapid; the cost is low; the judgement time is short; the calculation data volume is effectively reduced; the subjective assume is not doped; the stability is relatively high; and the method is relatively robust.

An inverter power supply system includes a half-bridge inverter circuit which includes a first switching element, a second switching element, a first auxiliary capacitor and a second auxiliary capacitor for converting a DC voltage from a DC power supply circuit to an AC voltage. An output control circuit outputs a first output control signal and a second output control signal with a phase difference of a half cycle to control the inverter circuit. An inverter driving circuit turns on the first (or second) switching element when the first (or second) output control signal turns ON while turning off the first (or second) switching element upon lapse of a first (or second) delay time for allowing the first (or second) auxiliary capacitor to discharge to apredetermined level after the first (or second) output control signal turns OFF.

The invention provides a single-mode optical fiber. The single-mode optical fiber includes a core layer and a cladding layer, the outer side of the core layer is provided with the cladding layer, thecladding layer includes a first cladding layer and a second cladding layer, the inner side of the first cladding layer is connected with the outside of the core layer, and the outer side of the firstcladding layer is connected with the inner side of the second cladding layer; and the invention further provides a manufacturing method of the single-mode optical fiber, the manufacturing method includes the following steps that step 1) powder-like loose bodies are prepared; step 2) the powder-like loose bodies are treated; step 3) fiber prefabrication rods are manufactured; step 4) the fiber prefabrication rods are treated; and step 5) wiredrawing is conducted. The single-mode optical fiber and the manufacturing method thereof have the beneficial effects that multiple variable scan be adjusted in the aspects of fiber design and manufacturing, the multiple variables are correspondingly a core layer diameter r1, the first cladding layer diameter r2 and refractive index difference valves [delta] 1, [delta] 2, [delta] 3 and [delta] 4, by changing the valves, the internal stress in fiber wiredrawing is reduced advantageously, Rayleigh scattering of the fiber is reduced, and loss valves ofthe fiber are further decreased as a whole.

A method of manufacturing a chip capacitor according to an aspect of the invention may include: preparing a capacitor lamination including a dielectric sheet formed of a composite having ceramic powder and a polymer mixed with each other, and first and second internal electrodes formed on both surfaces of the dielectric sheet at predetermined intervals; forming covering layers formed of an insulating material on both surfaces of the capacitor lamination; forming at least one first opening and at least one second opening in the capacitor lamination having the covering layers formed thereon to expose the first and second internal electrodes, respectively; forming plating layers in the first and second openings, the plating layers connected to the first and second internal electrodes; and dicing the result into chips on the basis of the first and second openings so that the plating layers formed in the first and second openings are provided as first and second external terminals.

The invention provides solid solution-modified sodium bismuth titanate leadless piezoelectric ceramics and a preparation method thereof. The piezoelectric ceramics are represented by chemical composition general formula of (1-x)(0.74Na0.5Bi0.5TiO3-0.26SrTiO3)-xBa(Zr0.05Ti0.95)O3 or (1-y)(0.9Na0.5Bi0.5TiO3-0.1CaTiO3)-yBa(Zr0.05Ti0.95)O3, wherein 0.04<=x<=0.1 and 0.04<=y<=0.1. Solid solution of Ba(Zr0.05Ti0.95)O3 is realized at the morphotropic phase boundary of a 0.74Na0.5Bi0.5TiO3-0.26SrTiO3 and 0.9Na0.5Bi0.5TiO3-0.1CaTiO3 system, and high-density microcrystalline structure ceramics with uniform crystal grain size distribution are obtained by a two-step forming method and a self-bearing pressure sintering process. The piezoelectric property of the material is optimized by the morphotropic phase boundary composition characteristics and the solid solution modification method, and the piezoelectric constant d33 reaches 110-138 PC / N; the electromechanical coupling coefficient of the material is also increased obviously; the preparation process of the material is simple and stable, and the material is an optimal material for manufacturing low-power ultrasonic devices and energy transducers used in fields of gas sensors, industrial nondestructive test, and the like.

The invention discloses a preparation method of an anisotropic FeSiAl magnetic core and a product. The preparation flow comprises the steps of (1) performing smashing on a FeSiAl cast ingot by adopting a sand mill and then performing flattening treatment to obtain flake-shaped FeSiAl magnetic powder; (2) coating the surface of the flake-shaped FeSiAl magnetic powder with an SiO<2> insulating material by adopting a sol-gel process; (3) performing uniform mixing on the coated FeSiAl and a binder to prepare coating paste, and coating a substrate with the paste, and next, putting the product into a magnetic field to be subjected to orientation; (4) performing hot pressing compaction treatment on the oriented coating sheet, and performing curing at a certain temperature; and (5) performing punch forming on the cured coating sheet to obtain the anisotropic FeSiAl magnetic core. The anisotropic FeSiAl magnetic core prepared in the invention has high insulativity as well as high heat resistance; high magnetic conductivity and low loss value still can be maintained at 1MHz, and high direct current biasing resistance characteristic is still kept; and in addition, the preparation process for the anisotropic FeSiAl magnetic core is mild in conditions, convenient and quick to operate and high in efficiency, and batch production can be promoted.

This invention provides a fluorate clad plastic fiber characterizing in having fluorate clad a fibre core or plastic fiber. This invention also provides the process method for fluorate clad plastic fiber including preparing materials: preparing fibre core or plastic fibre; putting fibre core or plastic fibre into a fluorate over with the concentration of 0.01%-10% to perform fluorate reaction for 2-72h at 10-80 deg.c to finish the fluorate clad plastic fiber.

The invention relates to a covered wire cold connector, which comprises a first plug core cavity and a second plug core cavity, wherein a first plug core tail handle is arranged in the first plug core cavity; one end of the first plug core tail handle is provided with a first plug core, while the other end is provided with a first slot; the first plug core is extended into a connecting pipe corresponding to the other end connected with the first plug core tail handle; the connecting pipe is provided with a second plug core corresponding to the other end provided with the first plug core; the second plug core is provided with a second plug core tail handle corresponding to the other end embedded in the connecting pipe; the second plug core tail handle is provided with a second slot corresponding to the other end provided with the second plug core and penetrates into a second plug core cavity; an optical fiber matching fluid corresponding to the end part of the first plug core is arranged in the connecting pipe and surrounds the end part of the first plug core; and the connecting pipe is provided with a vent hole corresponding to a side wall provided with the optical fiber matching fluid. The covered wire cold connector has the advantages of simple structure, convenient operation, low splice loss, high stability and high reliability.

A mobile terminal and a global positioning system calibration method are disclosed in the invention. The mobile terminal includes: a GPS parameter calibration module (10), which is configured to calibrate GPS parameters based on at least one of the following items: data from a GPS signal feedback and collection module (20), state parameters of the mobile terminal, and environmental parameters of the mobile terminal; the GPS signal feedback and collection module (20), which is configured to acquire the GPS parameters before and after the calibration implemented by the GPS parameter calibration module (10) and feed back the collected data to the GPS parameter calibration module (10). The GPS calibration function of the mobile terminal is enhanced with the invention.

The invention relates to a production method for a magnetic material, in particular to a low-permeability, low-power consumption Fe-Si-Al soft magnetic material and a production method thereof. The production method for the low-permeability, low-power consumption Fe-Si-Al soft magnetic material includes the following steps: (1) In the process of producing Fe-Si-Al powder, a melt-spinning machine rapid cooling method is adopted to produce a strip, and flat Fe-Si-Al powder is produced by atmosphere-protected mechanical crushing; (2) when the produced Fe-Si-Al powder is roasted until the temperature reaches 80 DEG C to 120 DEG C, phosphoric acid diluent is added for surface treatment, and the Fe-Si-Al powder then continues to be roasted to become dry; (3) the Fe-Si-Al alloy soft magnetic powder is pressed to be shaped; (4) in heat treatment, hydrogen or nitrogen is filled into a heat treatment furnace; (5) epoxy resin paint is applied on the surface of the soft magnetic material. The invention has the advantages that: the oxygen content of the powder is greatly decreased, the grain size of the product is reduced, consequently, the loss of the Fe-Si-Al product is reduced, and the properties of the product are enhanced.

The invention discloses a multi-core optical fiber connector, comprising a multi-core optical fiber capillary sleeved on a multi-core optical fiber, connection optical fibers, a connection optical fiber capillary sleeved on the outside of the connection optical fibers and an optical fiber elastic sleeving, wherein the quantity of the connection optical fibers is identical to that of the cores of the multi-core optical fiber, the distribution of the connection optical fibers is identical to that of the cores of the multi-core optical fiber and the outer diameter is D; the optical cable elastic sleeving sleeves the outside of the multi-core optical fiber capillary and the connection optical fiber capillary; when the multi-core optical fiber capillary is closely abutted against the connection optical fiber capillary, the multi-core optical fiber is abutted against the connection optical fibers; the multi-core optical fiber is in butt joint with the connection optical fibers through rotating the connection optical fibers; and the optical fiber elastic sleeving is fixed with the connection optical fiber capillary through glue and the multi-core optical capillary. Through the technical scheme of the multi-core optical fiber connection structure, two capillaries are abutted against and then realize the butt joint between the multi-core optical fiber and the connection optical fibers through rotating, and the loss value is minimum.

The invention relates to an optical fiber contact element, in particular to a photoelectric hybrid separation off connector. A floating optical fiber jack module comprises a jack fixing sleeve (19), alocation spring (21), an optical fiber jack part (22) and a jack guiding shaft (20), the jack guiding shaft (20) is of a hollow structure, the optical fiber jack part (22) is arranged in the jack guiding shaft (20), the location spring (21) sheathes the optical fiber jack part (22), one end of the location spring (21) tightly leans on the outer surface of the optical fiber jack part (22), the other end of the location spring (21) tightly leans on the inner wall of the jack guiding shaft (20), and the optical fiber jack part (22) can move and compress the location spring (21) in the axial direction; and a part of the jack guiding shaft (20) is contained in the jack fixing sleeve (19), a part of the jack guiding shaft (20) penetrates out the jack fixing sleeve (19), and the effect that thejack guiding shaft (20) can not penetrate out the jack fixing sleeve (19) is guaranteed by virtue of a limit structure. The photoelectric hybrid separation off connector provided by the invention realizes optical fiber transmission of the optical fiber contact element with long insertion and extraction life and low optical loss.

The invention relates to an insert device, in particular to an insert device with an exhausting function, belonging to the technical field of the optical fiber junction. The ferrule device with the exhausting function comprises a connection pipe; two ends of the connection pipe are respectively provided with a first ferrule and a second ferrule; one end of the second ferrule extends into the connection pipe and is fixedly connected with the connection pipe; one end of the first ferrule extends into the connection pipe and can slide in the connection pipe; the connection pipe is internally provided with optical fiber matching fluid corresponding to the end of the second ferrule, the fiber matching fluid surrounds the end of the second ferrule; and the connection pipe is provided with an exhausting hole corresponding to the side wall provided with the optical fiber matching fluid. The invention has the advantages of simple structure, convenient operation, low splice loss as well as high stability and reliability.

The invention relates to a text viewpoint mining method and system. The method comprises the steps of obtaining a to-be-mined text; carrying out preliminary screening of viewpoint statements on the to-be-mined text; according to the screened text to be mined, adopting a Fast Text-XG Boost model to carry out viewpoint statement recognition; according to the recognized viewpoint statement, adoptingan MTL-BiLSTM-CRFs model to perform viewpoint mining with annotation of the evaluation object and the evaluation word as a main task and part-of-speech annotation as an auxiliary task. According to the text viewpoint mining method and system provided by the invention, the mining efficiency and accuracy of the text viewpoints are improved.

The invention discloses an image recognition method based on an improved Focal loss function, and the method comprises the steps: improving a modulation factor of the Focal loss function on the basis of an existing Focal loss function, enabling the function to have higher attention to a difficult sample, and enabling the function to have relatively lower attention to a simple sample; and then, on the basis of the convolutional neural network model based on the Focal loss function, predicting the residual negative sample set, screening all difficult samples, dividing the samples into N equal parts, respectively adding the N equal parts into the original training set to form N new training sets, then training a plurality of models, and determining a final prediction picture label result according to voting selection of the N models. According to the method, on the basis of an original Focal loss function, the attention degree on a difficult sample is higher, and the model generalization ability is improved; and under the condition of excessive negative samples, difficult samples are screened out by utilizing the original model and added into the training set, so that the accuracy of the model is improved, available samples are fully utilized, and the calculation amount during model training is also reduced.

In a method for producing a grain-oriented electrical steel sheet by comprising a series of steps of hot rolling a raw steel material comprising C: 0.002-0.10 mass %, Si: 2.0-8.0 mass %, and Mn: 0.005-1.0 mass %, subjecting the steel sheet to a hot band annealing as required, cold rolling to obtain a cold rolled sheet having a final sheet thickness, subjecting the steel sheet to primary recrystallization annealing combined with decarburization annealing, applying an annealing separator to the steel sheet surface and then subjecting to final annealing, rapid heating is performed at a rate of not less than 50° C. / s in a region of 200-700° C. in the heating process of the primary recrystallization annealing, and the steel sheet is held at any temperature of 250-600° C. in the above region for 1-10 seconds, while a soaking process of the primary recrystallization annealing is controlled to a temperature range of 750-900° C., a time of 90-180 seconds and PH2O / PH2 in an atmosphere of 0.25-0.40, whereby a grain-oriented electrical steel sheet being low in the iron loss and small in the deviation of the iron loss value is obtained.

The invention provides an energy storage current transformer combination optimizing method based on maximum energy efficiency. The method includes the following steps: A, inputting basic data of a photovoltaic micro-grid; B, calculating the load within all sampling intervals [delta]T and the net power of photovoltaic output according to load data and photovoltaic output data in the step A; setting the required total power PC of an energy storage current transformer according to a net power value P0' obtained in the step B and associated with the charge and discharge process of an energy storage system and also according to the maximum energy storage charge and discharge power PBmax; D, calculating all current transformer combinations that meet requirements according to optional current transformer specifications and the total power of the current transformer determined in the step C; E, adopting a smart algorithm to distribute power to each current transformer combination determined in the step D within each period of time relative to each current transformer in the combination according to the net power value P0' obtained in the step B and associated with the charge and discharge process of the energy storage system and also to the configured the total power PC of the energy storage current transformer; and F, selecting the current transformer combination the loss of which is the minimum within a whole counted period of time in the step E as a final energy storage current transformer combination scheme.

A body structure of an AT power roll-core autotransformer relates to a body of a transformer. Insulation strength, an overload ability, an anti-short circuit ability, a high loss, etc. of a conventional autotransformer body structure cannot meet requirements of an electric railway. An iron core of the body structure of the AT power roll-core autotransformer is a single frame closed roll core structure, vertical columns of the iron core are iron core columns, and horizontal columns of the iron core are iron yokes. A plurality of concentric coils are wound around each iron core column, and upper and lower ends of each coil are both provided with insulation end rings. A lower end of a lower insulation end ring and an upper end of an upper insulation end ring are both provided with iron yoke insulation plates. Pressing devices are disposed on the upper iron yoke insulation plate, and integrally press the coil, the insulation end ring, and the iron core as a whole. The present technical solution uses the body structure of the roll-core autotransformer to enhance the insulation property and heat dispersion property, to improve the overload ability and the anti-short circuit ability of the transformer, to reduce the loss value of the transformer, and to meet the special requirements of the electric railway.

The invention belongs to the technical field of novel metal and alloy materials in new materials, and in particular relates to a polycrystalline silver platinum alloy plasma thin-film material and a preparation method thereof. The general formula of the thin-film material is Ag1-xPtx, wherein x represents the atomic percent of Pt in alloy and ranges 4-25%, and the thickness of the thin-film material is 50-200 nanometers. The polycrystalline silver platinum alloy plasma thin-film material is prepared by a magnetron sputtering technique, a utilized sputtering target is a composite target which has the same components as the silver platinum alloy plasma thin-film material to be sputtered, sputtering gas is argon, one-four pure platinum wafers are respectively arranged on a pure silver substrate target, the ratio of the total sputtering area of the pure platinum wafers to the sputtering silver target is 0.04-0.16, and the loss of the alloy thin-film material can be remarkably reduced through a suitable annealing treatment. The preparation method disclosed by the invention is simple, the raw materials are easy to obtain, and the cost is relatively lower; and the plasma property of the thin-film material disclosed by the invention is better than that of common metal, such as copper and gold, in a visible light frequency range and even is close to that of metal silver in some special areas so that the polycrystalline silver platinum alloy plasma thin-film material is an excellent plasma low-loss substrate.

The invention discloses a high specific capacitance capacitor cathode foil. The foil possesses an aluminum foil. A surface of the aluminum foil is sputtered with a titanium nitride layer. A surface of the titanium nitride layer is sputtered with a mixing layer of titanium nitride and graphite. By using the high specific capacitance capacitor cathode foil, an experiment shows that the titanium nitride layer and the aluminum foil surface are combined firmly; the mixing layer of the titanium nitride and the graphite and the titanium nitride layer are combined firmly; as the cathode foil, an electric capacity reaches several times of the electric capacity of the aluminum foil and is higher than a carbon foil; the cathode foil possesses lower impedance and losses than the aluminum foil and is especially suitable for making a solid state capacitor and a large capacity electrolytic capacitor. The cathode foil possesses characteristics of a small size, a long service life and good heat stability. The invention simultaneously discloses a film coating apparatus manufacturing the high specific capacitance capacitor cathode foil. The apparatus mainly comprises a vacuum unreeling chamber, a first vacuum film coating chamber, a second vacuum film coating chamber and a vacuum rolling chamber. By using the film coating apparatus, from an unreeling process to a rolling process, continuous film coating can be realized, a film coating speed is fast and production efficiency is high.