248 results about "Silver ink" patented technology

A sensor system that detects a current representative of a compound in a liquid mixture features a multi or three electrode strip adapted for releasable attachment to signal readout circuitry. The strip comprises an elongated support which is preferably flat adapted for releasable attachment to the readout circuitry; a first conductor and a second and a third conductor each extend along the support and comprise means for connection to the circuitry. The circuit is formed with single-walled or multi walled nanotubes conductive traces and may be formed from multiple layers or dispersions containing, carbon nanotubes, carbon nanotubes/antimony tin oxide, carbon nanotubes/platinum, or carbon nanotubes/silver or carbon nanotubes/silver-cloride. An active electrode formed from a separate conductive carbon nanotubes layer or suitable dispersion, positioned to contact the liquid mixture and the first conductor, comprises a deposit of an enzyme capable of catalyzing a reaction involving the compound and preferably an electron mediator, capable of transferring electrons between the enzyme-catalyzed reaction and the first conductor. A reference electrode also formed from a conductive carbon nanotube layer or suitable dispersion is positioned to contact the mixture and the second conductor. The system includes circuitry adapted to provide an electrical signal representative of the current which is formed from printing conductive inks made with nano size particles such as conductive carbon or carbon/platinum or carbon/silver, or carbon nanotubes/antimony tin oxide to form a conductive carbon nanotube layers. The multiple-electrode strip is manufactured, by then applying the enzyme and preferably the mediator onto the electrode. Alternatively the electrode can have a carbon nanotubes/antimony tin oxide, carbon nanotubes/platinum, or carbon nanotubes/silver or carbon nanotubes/silver-cloride surface and or a conductive carbon or silver ink surface connecting leg. The carbon nanotube solution is first coated and patterned into electro shapes and the conductive carbon nanotubes, carbon or silver ink can be attached by printing the ink to interface with the carbon nanotube electro surface. A platinum electrode test strip is also disclosed that is formed from either nano platinum distributed in the carbon nanotube layer or by application or incorporation of platinum to the carbon nanotube conductive ink.

Disclosed is a conductive composition which can be used to form an aqueous conductive ink with increased conductivity. The aqueous conductive composition contains conductive particles, preferably silver, an anionic wetting agent and a styrene-acrylic copolymer. The composition is highly conductive and requires reduced drying energy. In addition, it may be applied to low cost substrates by high speed printing processes.

There is provided an sensing device, comprising: a substrate; a sensor ink printed onto the substrate; a conductive polymer ink printed onto the sensor ink; a conductive carbon paste formed on the polymer ink; and a conductive silver ink printed on the conductive carbon paste. There is also provided a sensing device for processing a signal generated by the input device, the sensing device comprising: an operational amplifier to amplify the signal; a filter to filter signal noise from the signal; an adder to apply an offset and attenuation to the signal; a microcontroller comprising an analogue to digital converter to convert the signal into a digital output signal.

The invention discloses a printable flexible ammonia gas sensor. The printable flexible ammonia gas sensor comprises a flexible substrate, an ammonia gas sensitive layer and interdigital electrodes, wherein the ammonia gas sensitive layer is a composite film formed by a conductive polymer and metal nano-wires, and covers the flexible substrate; and the interdigital electrodes are made of a conductive silver ink material, and are coated on the ammonia gas sensitive layer. The ammonia gas sensitive layer is made of a conductive polymer and metal nano-wire composite system, and a making method of the ammonia gas sensor adopts a low temperature solution technology, so the ammonia gas sensor made in the invention has the advantages of high sensitivity, fast response speed and good stability, and the making method has the advantages of simplicity, no requirement for the making area, suitableness for large-scale production, realization of simultaneous production of a plurality of devices on a same substrate, great improvement of the making efficiency, and reduction of the industrial production cost.

The present invention provides an electrode ink composition and a method of using the same. The ink comprises a silver powder, a vehicle and an inhibitor. The silver powder is preferably free of palladium and gold and comprises particles having a maximum particle size of less than or equal to about 1 mum. The inhibitor comprises a powdered ceramic metal oxide composition comprising particles having a maximum particle size of less than or equal to about 0.9 mum.

An electrically conductive fiber and a coupled biomedical sensor are described. An electrically conductive core of the fiber includes a multiplicity of synthetic conductive filaments and an outer nonconductive fiber layer. The sensor area of the electrically conductive fiber is coated by thin film of silver ink and thin film of silver-silver chloride ink. The electrically conductive fiber's porous surface contacts the thin silver ink coating and the silver coating contacts the silver-chloride ink coating. A surface of the biomedical sensor is coated by a thick film of ionically conductive media, containing an electrolyte, in contact with the silver-chloride coating. The electrolyte diffuses into a porous structure of electrically conductive yarn.

A wiring circuit board and a method of producing the same are provided in which a desired pattern of wiring is provided at higher density while permitting no overflow from the grooves of an electroless plating catalyst containing solution and an electric conductor forming liquid such as silver ink.

The pattern of electric conductor is deposited by applying the electric conductor forming liquid into the grooves provided in a substrate and distributing the same along the grooves with the action of capillarity. The method starts with patterning the grooves in the surface of the substrate (S1), applying the electric conductor forming liquid into the grooves (S2), and coating the surface of the substrate with a layer of repellent liquid which is lower in the affinity with the electric conductor forming liquid (S3). This is followed by cleaning at least the grooves (S4) and then filling the grooves with the electric conductor forming liquid once again (S5). The electric conductor forming liquid applied into the grooves is then distributed throughout the grooves by the action of capillarity. When silver ink is used, the pattern of electric conductor is produced by repeating an action of applying and drying a number of times. Alternatively, the patter of electric conductor can be produced by an electroless plating technique or a combination of an electroless plating technique and an electro-plating technique for separating an electrical conductive material form the electric conductor forming liquid.

There is provided with a silver ink composition which is formed by blending one or more kinds of silver β-ketocarboxylates selected from the group consisting of silver isobutyrylacetate, silver benzoylacetate, silver propionylacetate, silver acetoacetate, silver α-methylacetoacetate, and silver α-ethylacetoacetate, and an aliphatic primary or secondary amine having 1 to 10 carbon atoms, and a substrate with a surface on which a metallic silver layer which is formed by heating the silver ink composition is provided. According to the invention, it is possible to obtain a silver ink composition suitable for forming a metallic silver layer which has superior glossiness and specularity, and a substrate with a surface on which a metallic silver layer is formed using the silver ink composition.

The invention belongs to the field of nano technology and particularly relates to a method for preparing nano silver conductive ink. The method comprises the following steps: dissolving a silver salt and an organic protective agent in a solvent, adjusting the pH value of the solution to 9 to 10 with an alkaline complexing agent, and raising the temperature gradually to 30 to 100 DEG C till the reaction system is a transparent solution; and cooling the reaction system obtained by the previous step to room temperature, adding a reducer into the reaction system, and continuously stirring the reaction system for 20 to 30 minutes to obtain the nano silver conductive ink. The molar ratio of the organic protective agent to the silver salt is 0.01-3:1; each 0.01 mol of silver salt is dissolved in 5 to 50 milliliters of solvent; and the molar ratio of the reducer to the silver salt is 1-3:1. The nano silver prepared by the method has the advantages that: the particle size is less than 10 nanometers; the process is simple, the reaction conditions are mild and the reaction time is short; the raw materials are simple and the dose of the dispersant is small; the purity and concentration are high; and the conductive property is good. In addition, the preparation cost of the nano silver ink is low; no harmful waste is produced, so the requirements for 'green production' are met; and the nano silver ink can be widely used in fields of touch screens, electronic tags, thin film switches, flexible circuit boards, medical products, sensors, printing contact, radio frequency interference screening, electrolysis, multilayer circuit board hole filling and the like.

A structural health monitoring system for a marine composite riser string is provided. Each riser pipe section includes a cylindrical form having an axis and also a carbon epoxy matrix. A sensor is associated with (e.g., embedded in) and substantially circumscribes the riser pipe section. The sensor includes a PolyVinyliDene Fluoride laminate and electrodes (e.g., conductive silver ink coating) so that the sensor generates electricity at the electrodes responsive to mechanical stresses and strains of the riser section, including vibrations. The system can also include a data acquisition system and digital signal analyzer to analyze signals responsive to the generated electricity at the electrodes of sensors and to provide health monitoring and damage detection for the marine riser pipe string, including impact damage and fatigue crack initiation. The system can further include a subsurface energy storage device and a plurality subsurface microelectromechanical devices coupled to the subsurface energy storage device.

The invention relates to a 2-2 type cement base piezoelectric composite material which belongs to an intelligent material in the civil engineering field. The composite material is manufactured by the following method: polarizing a cuboid piezoelectric ceramic block; using a slicer to sequentially cut out a series of piezoelectric ceramic pieces along the direction parallel to a piezoelectric ceramic polaxis and pouring cement according to a certain cement water ratio; after finishing the pouring, putting both a sample and a mould in a vacuum drying box for carrying out vacuum processing; putting the sample in a maintenance box for maintenance; and uniformly coating low-temperature conductive silver ink or plating an electrode on the two surfaces after two parallel surfaces are respectively sanded and polished so as to prepare the 2-2 type cement base piezoelectric composite material. The 2-2 type cement base piezoelectric composite material has the advantages of good piezoelectric performance and compatibility with concrete, integration of sensing and driving, good durability, simple preparation process, low cost, and the like.

The invention relates to a method for preparing a transparent electrode of a crystalline silicon solar cell, which comprises the following steps: A, an electrode sample is prepared, wherein a silver ink solution is dripped to the surface of a silicon chip with a pyramidal textured structure, and a uniformly distributed nano silver particle aggregate structure is formed on the surface of the whole silicon chip by adopting a dripping and coating method; and B, the electrode sample is sintered, wherein the electrode sample is heated through the microwave radiation so as to allow the nano silver particles to mutually fuse, thereby forming mutually connected metal nano wire/rod network structure. The preparation method provided by the invention is simple and has a low cost. The transparent electrode prepared by the method comprises micropores and mutually connected metal nano wires. The transparent electrodes prepared by the invention are arranged at the bottom of the pyramidal textured surface of the crystalline silicon solar cell and mutually connected, has the advantages of lower light reflection rate, better conductibility, and excellent potential carrier collection efficiency, can serve as a perfect substituent for a traditional silver grid electrode, and can improve the conversion efficiency of the solar battery, with reduced manufacturing cost.

The invention discloses a PPSMZT-doped piezoelectric ceramic, a preparation method thereof and use thereof. The preparation method comprises the following steps: synthesizing a ternary Pb0.98Sr0.02(Mn1/3Sb2/3)x(Zr0.5Ti0.5)1-xO3(PSMZT) pre-burnt product; doping cobalt-niobium-bismuth-lithium-copper-nickel low-melting-point glass with the pre-burnt product according a stoichiometric ratio; granulating; tabletting; removing bonder; sintering; polishing; firing silver ink; and polarizing and thus obtaining the PPSMZT-doped piezoelectric ceramic. The method of the invention obviously reduce the sintering temperature of the ceramic and retaining the performance of the ceramic, is applicable to high-power piezoelectric material, and provides a raw material for manufacturing laminated piezoelectric ceramic elements.

A chemical process to formulate conductive ink with low sintering temperature for inkjet printing is described and shown. The application of fabricated flexible conductive film on lithium ion batteries is also described. This chemical method and composition can remove the oxidation on metallic nanoparticle surface during ink fabrication and sintering processes. Etched metallic ions in the conductive ink are reduced and particles bridged while annealing printed patterns to achieve low temperature sintering at about 350° C. The chemical process can be applied on nickel materials that are excellent current collectors for lithium ion batteries due to high chemical stability especially at high charging-discharging potential of less than 3 Volts. Thermal decomposition and chemical reduction of silver salts are two methods disclosed for particle-free silver ink. Surfactant additive further make silver film more uniform and easier to be sintered.

Embodiments of the invention concern automatic color separation with a white ink for colored and/or transparent substrate, automatic color separation with a silver ink for a natural rendering, automatic color separation with a varnish which has a gloss scale different from that of the printed sample for all shades of gloss that are possible between high glossy to high matte for a false third rendering, automatic color variation with variable thickness under the inks, and variable gamut mapping for a low contrast space.

The invention relates to a solvent-based conductive silver ink, a preparation method and an application. The solvent-based metal conductive ink for ink jet printing is characterized by being preparedfrom 10%-30% metal salt, 1%-10% of a reducing agent, 10%-30% of a complex stabilizer, 40%-60% of a solvent and 0.1%-0.5% of an additive, wherein the sum of mass percentage of the components is 100%. The preparation method comprises the following steps: firstly, dissolving the metal salt in a stabilizer and a solvent, then adding the reducing agent, performing stirring at room temperature, then leaving the mixture to stand overnight, performing filtering to obtain a clear solution, and then adding the additive to obtain the conductive ink. A complex precursor solution is formed with the preparation method of the ink, the conductive ink is printed on a flexible substrate by a 3D ink jet printer in an additive manufacturing mode, and a conductive film is obtained by heating. The preparation method is simple, low in cost and low in post-treatment temperature. The prepared solvent-based conductive ink is suitable for ink jet printing and spray holes are prevented from being blocked; the conductive ink is suitable for preparing electrode circuits of various flexible electronic devices such as solar cells, field effect transistors, RFID and the like.

The invention provides silver ink with a good metal printing effect and a printing process using the silver ink. The printing process comprises the steps that first, a coated surface of a white cardboard with a single side coated is coated with water-soluble varnish or UV (ultraviolet) varnish, images and texts are printed with well mixed gravure silver ink in a gravure manner, and finally, a layer of water-soluble varnish or UV varnish is printed on an image and text area with the gravure silver ink. The gravure silver ink is formed by blending the following materials in percentage by weight: 60-68% of silver powder, 24-30% of n-propyl acetate, 1-3% of methyl methacylate, 1-3% of butyl acrylate, 1-2% of methacrylic acid, 1-2% of N-hydroxymethyl acrylamide, 0.5-1% of allyl methacrylate, 0.5-1% of isooctyl thioglycolate, 0.2-0.5% of alkylphenol ethoxylates sodium sulfate, 1-2% of water-resistant agents and 0.1-0.5% of drying agents. By means of the silver ink and the printing process, a metal ink layer has a refraction effect, the metal effect is more obvious and an optimal metal effect is achieved.

The invention relates to a preparation method for a crystalline silicon solar cell nanometer transparent buried gate electrode. The preparation of an electrode sample includes a first step of dripping silver ink solutions to the surface of a silicon wafer with a pyramid suede structure, exerting vibration in the horizontal direction on the silicon wafer, and enabling the whole surface of the silicon wafer to form an aggregate structure with evenly distributed nanometer silver particles, a second step of sintering the electrode sample, heating the electrode sample through microwave radiation and enabling the nanometer silver particles to be mutually fused to form mutually connected metal nanometer line or bar network structures, a third step of carrying out metal auxiliary chemical etching to the electrode sample, carrying out metal auxiliary etching process to the sample after being sintered in mixed solutions of hydrofluoric acid, hydrogen peroxide and ethanol, and enabling the metal nanometer line or bar network electrode to be inserted into the silicon wafer to form the nanometer transparent buried gate electrode. After the metal auxiliary chemical etching, antireflection effects of the metal nanometer line or bar networks inserting into the silicon wafer are remarkably optimized, contact resistance of the metal nanometer line or bar network electrode and the silicon wafer is remarkably decreased, and the electrode has a function of an antireflection layer and potential excellent carrier collection efficiency.

The invention discloses a potassium sodium niobate base lead free transparent ferroelectric ceramic material and a preparation method thereof. The formula of the ceramic material is (1-x)(K<0.5>Na<0.5>)Nb<3-x>Sr(Mg<1/3>Nb<2/3>)O3, and x represent the mole number of Sr(Mg<1/3>Nb<2/3>)O3 and is in a range of 0.02 to 0.08. The preparation method comprises steps of preparing raw materials, pre-burning, ball-milling, granulating, pressing, pressure-free sealed sintering, polishing, and silver ink firing; the ceramic material has the advantages of high light transmission, optical isotropy, strong practicality, and easy production, moreover, the preparation method is simple, the repeatability is good, and the yield is high. The test results show that when x is equal to 0.05, the optical transmission rate of the ceramic material is 60-70% in the near infrared area, at the same time, the ceramic material has good electric properties: the remnant polarization is 4.8 [mu]C/cm2, the coercive field is 7.4 kV/cm, the maximal dielectric constant is 2104, the dielectric loss is less than 0.03, and the piezoelectric constant d33 is 48 pC/N.