32results about How to "Reduce bulk resistivity" patented technology

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 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.

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 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 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 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 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.

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.