33results about How to "Reduce bulk resistivity" patented technology

The invention discloses a conductive silver paste for microelectronic packaging, which contains the following components in parts by mass: 10-12 parts of liquid epoxy resins, 9-10 parts of diluents, 10-13 parts of spherical silver powder, 50-57 parts of platy silver powder, 0.5-1.5 parts of latent curing agents, 0.2-0.8 part of curing promoter, 1-2 parts of coupling agents, 0.5-1 part of conductive promoters, 0.5-1 part of aging resister and 1.5-2.3 parts of toughening agents. The body resistivity of the conductive silver paste prepared by the invention reaches 10-5 omega.cm, the shear strength is greater than 9MPa, and the conductive silver paste has stable contact resistance; and after low-temperature circulation, high-temperature humidity aging tests and other aging tests, the shear strength, the impact-resistant toughness and the contact resistance change are all less than 18%. The prepared conductive silver paste is suitable for microelectronic packaging and has the advantages of stable contact resistance and strong impact resistance.

An electrically conductive composite comprising a polyvinylidene fluoride polymer or copolymer and carbon nanotubes is provided. Preferably, carbon nanotubes may be present in the range of about 0.5-20% by weight of the composite. The composites are prepared by mixing or dispersing carbon nanotubes in polymer emulsion using an energy source such as a Waring blender. The liquid in the mixture is then evaporated to obtain the composite comprising the polymer and the nanotubes.

The invention discloses a preparation method of ITO (Indium Tin Oxide) powder, comprising the following steps of: (a) adding an aqueous alkaline solution with the concentration of 10-30 percent by weight to an indium tin solution to obtain an indium tin hydroxide precipitation solution, and controlling the temperature of an initial precipitation solution between 18 DEG C and 30 DEG C in the process of adding the aqueous alkaline solution; (b) separating precipitations and liquid contained the indium tin hydroxide precipitation solution; (c) washing the separated precipitations; and (d) calcining the precipitations to obtain the ITO powder. The invention is beneficial to enhancing the sintering property of the ITO powder by selecting proper aqueous alkaline solution concentration and precipitation temperature according to that the aqueous alkaline solution concentration and the precipitation temperature have a great impact on the sintering property of the ITO powder when the indium tin solution is added to the aqueous alkaline solution; an ITO sintering body prepared by the ITO powder has at least 7.08 g / cm<3> of density, bulk resistivity lower than 1.90*10<-4> ohm.cm and maximum crystallite dimension of the sintering body, which is smaller than 10 micrometers.

The invention discloses a blackening method of a lithium tantalate crystal substrate. The blackening method includes that in a chemical reductive atmosphere, a metal sheet and the lithium tantalate crystal substrate are alternately stacked by means of contacting after the surfaces of the same are roughened, and put in an environment lower than Curie temperature, the lithium tantalate crystal substrate is reduced to convert the same from white or faint yellow to colored and non-transparent, and original characteristics of the lithium tantalate crystal substrate as a piezoelectric material are still maintained. Bulk resistivity of the lithium tantalate crystal substrate after being reduced can be lowered, discharging generated by pyroelectric effect due to temperature difference in the manufacturing process of a surface acoustic wave filter (SAW filter) can be improved, accuracy of photoetching process of an interdigital electrode line is improved, and increasing of yield of SAW device manufacturing and lowering of production cost are facilitated.

The invention relates to a preparation method for high-crystallinity silver powder. The preparation method is characterized by comprising the following steps of: firstly, synthesizing a silver carbonate precursor; uniformly coating the silver carbonate precursor by using a coating agent; and performing low-temperature crystal water removing, high-temperature thermal decomposition, densification sintering and washing on the coated silver carbonate precursor to obtain high-crystallinity silver powder. Due to the adoption of the method disclosed by the invention, high-crystallinity silver powder of which the particle diameter is 0.1-5 mu m and the tap density is 3.0-7.0 g / cm<3> can be finally obtained; the silver powder can be used for preparing silver slurry or silver paste for fine threads and high-accuracy printed galvanic circles; the silver powder has the advantages of high dispersity, high crystallinity, superior degree of sphericity, uniform particle size distribution, easiness for dispersing in silver slurry or silver paste and high filling characteristic, so that high-accuracy fine thread printing can be realized; and meanwhile, an obtained silver thick film has low sintering concentration rate and low bulk resistivity.

The invention discloses a method for synthesizing a lithium iron phosphate and carbon nanotube composite material in situ. The method comprises the following steps of: uniformly mixing an iron source, a lithium source, a carbon source, a phosphor source and a catalyst, i.e. dicyclopentadienyl iron in a stirring mill with alcohol as a medium; performing drying and ball milling on the mixture; and sintering the mixture in nitrogen gas and mixed aromatic hydrocarbon mixed gas for 4 to 20 hours at the temperature of 400 to 1,000 DEG C to obtain the composite material. While the lithium iron phosphate is generated, a carbon nanotube is grown on the surface of a particle in situ, and a conducting network is formed in a secondary coacervate. The method has the characteristics of simple process, low energy consumption and high efficiency. The prepared material is high in purity, relatively small in particle size and excellent in electrochemical performance. The synthesized lithium iron phosphate is relatively flat in discharge platform, wherein the discharge capacity of 0.2C lithium iron phosphate is 162mAh / g, and the discharge capacity of 2C lithium iron phosphate is 150mAh / g.

The invention aims to solve the technical problems of overcoming the defects of high resistivity, low ductility and poor adhesion between a conductive layer and a basal body of the transparent conductive film in the prior art and provide a novel transparent conductive film and a preparation method thereof. The novel transparent conductive film comprises the following components in percentage by mass: 25-35 percent of hydrogenated bisphenol A epoxy resin, 22-25 percent of epoxy resin active diluting agent, 0.5-1.5 percent of anti-ultraviolet (UV) additive, 20-30 percent of hydrogenated alicyclic amine, 2.5-4 percent of modified amine type curing promoter and 12-27 percent of conductive filler. The transparent conductive film is low in both surface resistivity and size resistivity, can be made into thin films of different thickness, and has the advantages of high transparency, high conductivity, high adhesion strength and the like; and the preparation method has the advantages of simple preparation method, readily available raw materials and non-severe preparation conditions.

The invention provides a photovoltaic tabbing ribbon which is low in resistivity and great in light reflecting effect. The photovoltaic tabbing ribbon comprises a baseband which is provided with a front surface used for receiving light and a back surface used for connecting a solar cell. The photovoltaic tabbing ribbon also comprises a silver coating layer which covers the front surface of the baseband and a tin coating layer which covers the back surface of the baseband. The front surface of the silver coating layer outwardly protrudes to form a curved surface in a way of opposing the baseband. The connecting line of the center of the circle of all the curved lines forming the curved surface extends along the length direction of the tabbing ribbon.

A MgO-TiO sintered compact comprising 25 to 90 mol% of TiO, with the remainder made up by MgO and unavoidable impurities. The present invention addresses the problem of providing: a highly dense target which has a high film deposition speed and can be subjected to direct-current (DC) sputtering by which particles are formed in a reduced amount; and a method for producing the target.

The invention discloses a preparation method of mold-pressing-resistant dipping silver paste. The method comprises the following steps: (1) sufficiently dissolving a 1-20% thermoplastic resin in a certain amount of organic solvent to prepare a resin solution; (2) proportionally adding a thermosetting resin monomer and a curing agent into the resin solution in the step (1), and sufficiently stirring uniformly to prepare an organic carrier; and (3) mixing the organic carrier obtained in the step (2) and silver powder according to the mass ratio of 1:1, and uniformly dispersing by ball milling. The method is simple and feasible in reaction steps, and is suitable for large-scale mass production. Besides, the mold-pressing-resistant dipping silver paste has the advantages of low volume resistivity, favorable high-temperature adhesion, no sagging and excellent high-temperature mold pressing resistance.

The invention discloses moisture-proof and salt-mist corrosion-resistant conductive rubber. The moisture-proof and salt-mist corrosion-resistant conductive rubber is prepared from 100 parts of kneaded silicone rubber, 285-310 parts of silver-plated aluminum conductive powder, 1.2-9 parts of composite coupling agent and 1.5-3 parts of vulcanizing agent. The conductive rubber prepared by a preparation method disclosed by the invention has he advantages of significantly improving moisture proofness and resistance to salt-mist corrosion, increasing the density of materials, improving mechanical properties and electromagnetic shielding performance of the conductive rubber and solving the slag falling defect of the conductive powder.

The invention relates to a sintered body, a sputtering target comprising the sintered body and a thin film formed by using the spattering target. The present invention relates to a sintered body or a film containing ZnS and an oxide. The sintered body contains 40 to 70 mol% of ZnS. The oxide in the sintered body contains a composite oxide including at least Zn, Ga, and O. The composition of the sintered body or the film satisfies a relational expression of 4 at% <= Ga / (Ga + Zn - S) <= 18 at%. An objective of the present invention is to provide a sputtering target that is low in bulk resistance value and allows stable DC sputtering. Another objective of the present invention is to provide a thin film as a film for optical adjustment, an optical disc protection film, or a transparent conductive film for various types of display, which has excellent optical or high-temperature high-humidity resistance characteristics.

The invention relates to a multifunctional anti-interference data cable which comprises an aluminum core and two copper data leads. The two copper data leads are wrapped in two shielding insulation layers respectively, and an oversheath layer wraps a flame-retardant layer. The oversheath layer comprises 100 parts of 1,3-butadiene, 50-60 parts of styrene, 25-35 parts of an ethane-vinyl acetate copolymer, 20-35 parts of chlorinated polyethylene, 10-12 parts of didecyl phthalate, 15-20 parts of polythiophene, 5-10 parts of siloxane, 20-25 parts of fumed silica, 5-10 parts of copper powder, 1-2 parts of polyethylene wax, 1.8-2 parts of titanium dioxide, 1-1.5 parts of 4,4-bis(alpha,alpha-dimethylbenzyl)diphenylamine, 0.5-1 part of dicumyl peroxide, 2-3 parts of triallyl cyanurate and 3-4 parts of dilauryl thiodipropionate by weight. The multifunctional anti-interference data cable reduces overhearing and signal attenuation, and has physical mechanical performance of higher tensile and tearing intensity.

The invention discloses a wear-resistant outdoor data cable which comprises an aluminum core, two data copper conductors and a filling rope, wherein a copper layer is coated with the aluminum core and an outer surface of the copper layer is coated with an insulation foam layer; each data copper conductor is coated with a shield insulation layer and outer surfaces of the two shield insulation layers are coated with a single-sided aluminum foil layer; a partition is positioned between the insulation foam layer and the single-sided aluminum foil layer, a first side tail fin part and a second side tail fin part are arranged at two ends of the partition respectively and positioned on a left side and a right side of the partition respectively, each shield insulation layer comprises specific components, the partition adopts a helical structure in a length extension direction, and the helical pitch of the partition is 75-90 mm; an outer surface of a flame-retardant layer is coated with an outer sheath layer. The wear-resistant outdoor data cable improves reflection and absorption of low-frequency electromagnetic waves, enhances the cross-linking strength of a basic material while improving crosstalk and signal attenuation, and has relatively high tensile and tear strength as well as physical and mechanical properties.

The invention discloses an anti-crosstalk high-speed data transmission cable for the 10-gigabit Ethernet. The cable comprises eight copper leads and a cross skeleton. Each copper lead is wrapped in a semi-conductive layer, and the external surface of the cross skeleton is plated with an aluminum layer. The semi-conductive layer comprises 100 parts of 1,3-butadiene, 50 to 60 parts of styrene, 25 to 35 parts of ethane-vinyl acetate copolymer, 8 to 14 parts of ethane-vinyl acetate copolymer grafted maleic anhydride copolymer, 5 to 10 parts of siloxane, 20 to 25 parts of vapor-phase-method white carbon black, 5 to 10 parts of cooper powder, 1 to 2 parts of microcrystalline wax, 1.8 to 2 parts of titanium white, 1 to 1.5 parts of 4,4'-bis(alpha,alpha-dimethylbenzyl)diphenylamine, 0.5 to 1 part of dicumyl peroxide, 2 to 3 parts of triallyl cyanurate and 3 to 4 parts of dilauryl thiodipropionate by weight. The high-speed data transmission cable improves reflection and absorption of high-frequency electromagnetic waves, reduces crosstalk and signal attenuation, broadens the bandwidth of adsorption frequency, and enhances the stability of product performance.

The invention discloses a high-performance graphene / nylon 6 alloy and a preparation method thereof. The alloy comprises graphene / nylon 6 master batch, a nylon 6 elastomer, a high polymer material, a compatibilizer and an antioxidant, and the graphene / nylon 6 master batch is graphene / nylon 6 resin prepared through in-situ polymerization on a graphene oxide sheet layer, and blending and extruding the graphene / nylon 6 resin and nylon 6 to obtain the graphene / nylon 6 composite material. The alloy is prepared by blending and extruding the graphene / nylon 6 master batch, the nylon 6 elastomer, the high polymer material, the compatibilizer and the antioxidant, the alloy has more excellent mechanical properties such as better notch impact strength, tensile strength and bending strength, on the basis, due to the synergistic effect of graphene and nylon 6 elastomer, the alloy has ultrahigh toughness, the production process of the product is simple, industrial continuous production is easy, and the production cost is low. Wide application prospects are realized, and higher economic benefits are realized.

The invention discloses a method for reducing transparency and resistivity of a lithium niobate or lithium tantalate wafer, which comprises the following steps of: alternately arranging the pretreated lithium niobate or lithium tantalate wafer and pure cotton paper or fiber cloth to form a laminated structure, and performing reduction blackening treatment on the wafer under a specific annealing furnace process condition to obtain the lithium niobate or lithium tantalate wafer. By adjusting the ratio of the thickness of the pure cotton paper or the fiber cloth to the thickness of the wafer, the lithium niobate or lithium tantalate yellow black wafer / grey wafer with different reduction degrees can be controllably prepared, the problems that the wafer blackening speed is too high, the reduction degree of the wafer is difficult to control, and the wafer is completely blackened are effectively solved, meanwhile, the resistivity and the light penetration rate of the wafer are effectively reduced, and the service life of the wafer is prolonged. And the whole process preparation process is environment-friendly and pollution-free, the reduction blackening treatment process is simple, the energy consumption is low, the production efficiency is low, and the method has excellent actual production value.

A method for blackening treatment of lithium tantalate crystal substrates. In a chemically reducing atmosphere, roughen the surfaces of metal sheets and lithium tantalate crystal substrates, and then alternately stack them in a contact manner, and place them in a temperature lower than the Curie temperature. In the environment, the lithium tantalate crystal substrate is reduced to make the lithium tantalate crystal substrate change from white or light yellow to colored and opaque, and still maintain its original piezoelectric material characteristics. The reduction treatment of lithium tantalate crystal substrate can reduce its volume resistivity, improve the discharge phenomenon caused by pyroelectric effect caused by temperature difference in the manufacturing process of surface acoustic wave filter (SAW filter), and improve the interdigitated electrode lines in The precision of the photolithography process helps to improve the yield of SAW device manufacturing and reduce production costs.

The invention discloses a shielding high-speed enhanced CAT 7 type data communication cable which comprises eight copper leads and a cross skeleton. A sheath layer wraps a tinned copper wire braided layer. The sheath layer comprises 100 parts by weight of 1,3-butadiene, styrene, ethane-vinyl acetate copolymer, ethane-vinyl acetate copolymer grafted maleic anhydride copolymer, siloxane, vapor-phase-method white carbon black, cooper powder, microcrystalline wax, titanium white, 4,4'-bis(alpha,alpha-dimethylbenzyl)diphenylamine, dicumyl peroxide, triallyl cyanurate and dilauryl thiodipropionate. The pitches of first, second, third and fourth twisted pairs are 15.2, 13.7, 14.4 and 12.9 mm respectively. The shielding high-speed enhanced CAT 7 type data communication cable improves reflection and absorption of high-frequency electromagnetic waves, reduces crosstalk and signal attenuation, broadens the bandwidth of adsorption frequency, and enhances the stability of product performance.

The invention relates to the field of crystal silicon solar cells, in particular to a novel front surface electrode of a crystal silicon solar cell. The novel front surface electrode of the crystal silicon solar cell is characterized in that the novel front surface electrode is positioned in a cutting notch of a crystal silicon cell n-type surface, is a Cu-Ag-Ni serial low-silver conductive alloy electrode and uses Cu as a matrix and Ag and Ni as additive elements and the width d of the cutting notch is 45 microns; the cutting notch is prepared by laser radiation; the Cu-Ag-Ni serial low-silver conductive alloy electrode is prepared by an electroless plating method; as having improved physical strength and not forming alloy with a silicon body, the prepared novel front surface electrode is not broken after a crystal silicon cell piece generates cracks and can continue achieving the function of current collecting. Compared with an Ag-Si alloy, the novel front surface electrode has the advantage of saving Ag by more than 40%, the electric performance of the cell piece adopting the novel electrode is greatly improved by testing, and the improvements mainly comprise that the open circuit voltage and serial resistance are reduced and a filling factor is improved.

The invention belongs to a method for preparing a nano composite material. A multi-walled carbon nano-tube has excellent mechanical properties and conductivity and a unique nano effect of a one-dimensional nanostructure, due to having higher surface energy and surface binding energy, the surface atoms of the multi-walled carbon nano-tube are more easily agglomerated when the multi-walled carbon nano-tube is used as a reinforced material of a polyvinyl composite material with low density, thereby the multi-walled carbon nano-tube has a low dispersion degree in a polyethylene matrix with low density, and an application performance of the composite material is influenced. The method for preparing the nano composite material comprises the following steps: the multi-walled carbon nano-tube is mixed in xylene solvent in advance by using ultrasonic waves; then, the multi-walled carbon nano-tube is mixed with polyethylene solution with low density at 110 DEG C; and finally, the multi-walled carbon nano-tube and polyethylene with low density are internally mixed and dispersed at 180 DEG C. The invention provides the method for preparing the nano composite material by the dispersion of the multi-walled carbon nano-tube in the polyethylene with low density.

The invention discloses an anti-interference data cable easy to lay. The data cable comprises an aluminum core, two copper power leads and two copper data leads. The two copper data leads are wrapped in two shielding insulation layers respectively. The shielding insulation layer comprises 60 parts of nitrile butadiene rubber, 40-50 parts of methyl vinyl silicone rubber, 25-35 parts of an ethane-vinyl acetate copolymer, 20-35 parts of chlorinated polyethylene, 10-12 parts of tetrabromophthalic anhydride, 12-15 parts of polyaniline, 5-10 parts of polythiophene, 8-10 parts of siloxane, 16-20 parts of fumed silica, 1-2 parts of polyethylene wax, 1-1.5 parts of 4,4-bis(alpha,alpha-dimethylbenzyl)diphenylamine, 2-4 parts of dicumyl peroxide, and 2-5 parts of triallyl isocyanurate by weight. According to the data cable, the bandwidth of absorption frequency is broadened, the hardness and the reliability are improved, and the service life is prolonged.

The invention discloses an n-type high-conductivity Si-based negative electrode material and a preparation method thereof, and relates to the technical field of negative electrode materials for lithium ion batteries. 2 Si is silicon source, AlBr 3 As the oxidant, silicon source, oxidant and phosphorus source are added into the solvent, and the phosphorus-doped n-type high-conductivity Si-based negative electrode material is synthesized in situ by solvothermal method. The invention adopts the solvothermal method to synthesize the phosphorus-doped n-type high-conductivity Si-based negative electrode material in-situ, the synthesis process is carried out at a lower temperature, the reaction is sufficient, the phosphorus doping amount is easy to control, and no toxic and harmful substances are used in the preparation. Reagents, green and safe, and do not require high temperature environment. The prepared Si-based material has high purity and high conductivity. During the slurry mixing process, the proportion of conductive agent used can be reduced and the energy density of the battery can be improved; using it as a negative electrode material can effectively reduce the volume resistivity and provide more electrons The transmission channel has a higher lithium storage capacity, thereby improving the battery rate performance and reducing polarization.

The invention discloses a marine high-frequency data transmission cable. The cable comprises eight copper wires and a cross framework. Each copper wire is coated with a semiconductor layer. Four ends of the cross framework are each provided with an end strip part. The semiconductor layer comprises following components in parts by weight: 100 parts of 1,3-butadiene, 55-58 parts of styrene, 28-30 parts of ethylene-vinyl acetate copolymer, 10-12 parts of ethylene-vinyl acetate copolymer grafted maleic anhydride copolymer, 8-10 parts of siloxane, 22-25 parts of fumed silica, 6-8 parts of copper powder, 1.2-1.6 parts of microcrystalline wax, 1.8-2 parts of titanium dioxide, 1-1.2 parts of 4,4'bis(alpha,alpha dimethyl benzyl)diphenylamine, 0.6-0.8 part of dicumyl peroxide, 2.2-2.5 parts of triallyl cyanurate, and 3.2-3.5 parts of dilauryl thiodipropionate. The marine high-frequency data transmission cable improves reflection and absorption of high-frequency electromagnetic waves, alleviates cross talk and signal attenuation, expands the bandwidth of absorption frequency and improves the stability of product performance.

The invention discloses a high-speed network data transmission cable for maritime affairs. The cable comprises eight copper leads and a cross framework, wherein the copper leads are wrapped with semiconductor layers; four end strip parts are arranged at the four tail ends of the cross framework respectively; and each semiconductor layer comprises the following components in parts by weight: 100 parts of 1,3-butadiene, 55-58 parts of styrene, 28-30 parts of ethylene-vinyl acetate copolymer, 10-12 parts of ethylene-vinyl acetate copolymer grafted maleic anhydride copolymer, 8-10 parts of siloxane, 22-25 parts of fumed silica, 6-8 parts of copper powder, 1.2-1.6 parts of microcrystalline wax, 1.8-2 parts of titanium dioxide, 1-1.2 parts of 4,4'-bis-(alpha, alpha dimethyl benzyl) diphenylamine, 0.6-0.8 parts of dicumyl peroxide, 2.2-2.5 parts of triallyl cyanurate, and 3.2-3.5 parts of dilauryl thiodipropionate. The cable improves reflection and absorption of a high-frequency electromagnetic wave, improves crosstalk and signal attenuation, expands the bandwidth of absorption frequency, and improves the stability of product performance.

Disclosed are a silver nanowire positive electrode for a silver zinc battery and a method for preparing the same. The method comprises the following steps: laying pre-processed silver nanowires above and below a current collector; and performing compression molding and vacuum sintering and obtaining a silver nanowire positive electrode. The silver nanowire positive electrode obtained in the present invention has advantages of a large specific surface area, reduced thickness, low volume resistance, and a stable structure.

The invention discloses main grid slurry containing silver-copper alloy powder and a preparation method of the main grid slurry. The main grid slurry comprises the following components in percentage by weight: 75-90% of silver powder, 0.2-2% of glass powder, 0.1-20% of silver-copper alloy powder and 8-25% of an organic carrier. The glass powder is one of Mn-Cu system glass and Pb-Si-Ti system glass; the silver-copper alloy powder is silver-copper binary, ternary and quaternary alloy powder, and the organic carrier comprises a solvent, a plasticizer, a thixotropic agent, a thickening agent and a dispersing agent. According to the invention, the silver-copper alloy powder is matched with the silver powder for use, so that under the condition of low glass content, a high-density main gate electrode is realized, the resistivity of the main gate electrode body is reduced, the welding resistance of the main gate silver paste is improved, a high-electrical-performance battery structure is further obtained, the glass content of the main gate paste is reduced, the open voltage of the battery is improved, and the photoelectric conversion efficiency of the battery is improved. As the silver-copper alloy powder is used, the consumption of silver is reduced, the consumption of slurry is saved, and the cost is further reduced.

The invention provides a photovoltaic tabbing ribbon which is low in resistivity and great in light reflecting effect. The photovoltaic tabbing ribbon comprises a baseband which is provided with a front surface used for receiving light and a back surface used for connecting a solar cell. The photovoltaic tabbing ribbon also comprises a silver coating layer which covers the front surface of the baseband and a tin coating layer which covers the back surface of the baseband. The front surface of the silver coating layer outwardly protrudes to form a curved surface in a way of opposing the baseband. The connecting line of the center of the circle of all the curved lines forming the curved surface extends along the length direction of the tabbing ribbon.