6008results about How to "High temperature resistant" patented technology

The invention relates to an electrosurgical instrument for coagulating and/or cutting biological tissue, which can be manufactured easily and economically, wherein a surgical intervention is to be carried out easily and reliably with the instrument. For this purpose, the instrument comprises the following:

• • two linked branches which can be moved toward one another,
  • gripping devices at a proximal region of the branches or of the instrument for bringing the branches together,
  • electrode parts at a distal region of the branches or of the instrument for grasping tissue and for conducting an HF current through the tissue,
  • current feed devices for feeding the HF current to the electrode parts from an HF generator,
  • a switching device for activating the HF current with the branches brought together,
  • at least one spacing element to form a defined minimum spacing between the electrode parts,
  • at least one elastically deformable element, which is arranged at one of the branches or the gripping devices such that, on closing the branches and reaching the minimum spacing, at least one region of the gripping devices can be moved further in the proximal region for actuating the switching device.

The instrument can also be carried out as a shaft instrument, wherein at least one electrode part is movable through a shaft in its extension direction.

The invention relates to the technical field of high voltage and insulation, in particular to a device for researching and testing an insulating property of high-voltage oiled paper. Aiming at the positions of frequent faults during the operation of a converter transformer, the device simulates a ball-board, a needle-board, a board-board, faces and suspension discharge electrode models; and the typical high-voltage oil/oiled paper insulating experiments can be realized under direct current (DC) voltage, alternating current (AC) voltage and AC-DC voltage so as to acquire partial discharge characteristics and breakdown characteristics of the major insulation of the converter transformer.

The invention provides association-type non-crosslinking fracturing fluid and a preparation method thereof. The association-type non-crosslinking fracturing fluid is prepared from hydrophobic modified partial hydrolytic polyacrylamide and derivatives of the hydrophobic modified partial hydrolytic polyacrylamide serving as active ingredients, a gel breaker, potassium chloride, an optional surface active agent and water, wherein each of the molecular structures of the hydrophobic modified partial hydrolytic polyacrylamide and the derivatives of the hydrophobic modified partial hydrolytic polyacrylamide contains acrylamide monomer unit, at least one biparental unsaturated monomer unit and at least one an anion alkene unsaturated monomer unit. As the molecular structure of a thickening agent contains a biparental monomer unit, a reversible super-molecule network can be formed in an aqueous solution through intermolecular hydrophobic association, and the high viscosity and the suspending power required by the fracturing fluid can be obtained without needing chemical crosslinking. The association-type non-crosslinking fracturing fluid based on the thickening agent has the characteristics of simple composition, low residue content, low damage, low friction, shear resistance, temperature resistance and salt resistance and can turn into a new generation of fracturing fluid system for replacing guanidine gum and fracturing fluid thereof.

The invention discloses a rapidly degradable magnesium alloy material. The material comprises the following components: elements such as Al, Li, Ca, Y, Si, Ni, Cu and Fe. The invention also discloses a preparation method and the application of the rapidly degradable magnesium alloy material. Compared with the prior art, the rapidly degradable magnesium alloy material has the advantages that the problems of failure in resisting high temperatures and failure in meeting high-temperature and high-bearing operation requirements of the existing easily degradable materials or easily degradable magnesium alloy materials and products thereof are solved, meanwhile, the material is controllable in density, the slag or the corrosion product of the material meets the requirements of flowback operations, and multiple technical effects of simplicity and high efficiency, low cost, energy conservation, environmental protection and the like can be achieved.

The invention discloses a photo-curing adhesive, in particular relates to an adhesive of ultraviolet rays or visible light. The adhesive comprises components of the following weight ratios: 10 percent to 75 percent of matrix resin, 5 percent to 50 percent of assisted resin and 10 percent to 70 percent of acrylate monomer, wherein, the matrix resin is a mixture of one or the mixture of polyether-based polyurethane and polybutadiene acrylate and the assisted resin is one or the mixture of polyurethane acrylate or epoxy acrylate. The photo-curing adhesive provided by the invention has better adhesive performance than a common adhesive, especially has very high adhesive strength to glass, crystal and metal, meanwhile, the photo-curing adhesive has excellent resistance performance to high temperature, high humidity and water boiling, thereby having wide application prospect.

The invention discloses a nano modified water-base multifunctional sound-absorbing paint and a preparation method thereof. The paint is composed of the following components in parts by weight: 28-38 parts of emulsion, 2-10 parts of pigment, 30-45 parts of filler, 15-25 parts of water, 4-8 parts of flame retardant and 2.25-5.43 parts of assistant. By optimizing the paint system structure, the polymer and filler are selected, modified and proportioned to ensure the basic mechanical properties and sound-absorbing function, and the paint has high-value service properties, such as thermal insulation, moisture resistance, fire resistance, aging resistance, fouling resistance, sterilization, air purification and the like, and is especially suitable for rooms and other occasions with higher environmental requirements.

The invention discloses a method for preparing a three-dimensional porous graphene material by solution. The method comprises the following steps of: immersing a three-dimensional porous template into a graphene oxide solution, and then depositing the graphene oxide on the template to realize three-dimensional assembling of the graphene oxide on the template, and then preparing the three-dimensional porous graphene material containing the template by reduction; removing the template from the three-dimensional porous graphene material containing the template, and then washing to obtain the three-dimensional porous graphene material. The aperture of the three-dimensional porous graphene material can be regulated and controlled by using the templates with different apertures the material prepared by the invention has the advantages of low density, high specific surface area, high heat conductivity, high-temperature resistance, and corrosion resistance; the preparation method is economical and simple and suitable for large-scale production. And the prepared material is applicable to aspects such as catalytic carriers, preparation of flexible conductors, and stretchable electronics.

The invention relates to a novel organic boron cross linking agent for fracturing and fracturing fluid for deferring cross bonding vegetable glue, wherein the preparation method comprises the steps of, reacting sodium borate with multicomponent aldehydes (e.g. ethanedial), adding polyvalent alcohol amine (e.g. triethanolamine) for complete reaction, forming component an of organic boron cross linking agent, and organic boron component B of 20-30% caustic soda liquor solution, mixing component an and B in the proportion of 100:5-100:15 to form the organic boron cross linking agent. While the organic boron deferring cross bonding vegetable glue fracturing fluid comprises vegetable glue polymer, pH regulator, glue breaking agent and organic boron cross linking agent.

The invention relates to a method for preparing solventless unsaturated polyester-imide wire coating enamel. The method comprises preparation of unsaturated polyester-imide and processing of paint mixing, wherein the unsaturated polyester-imide is prepared by the following steps: first step, adding polylol, dibasic acid or estolide into a reaction kettle according to a mol ratio of 1.05-1.5:1; stirring and heating the mixture to a temperature of between 160 and 170 DEG C; preserving the heat for 0.5 to 2 hours; and slowly heating the mixture to a temperature of between 200 and 205 DEG C until the acid value is no less than 50 mg KOH/g; and second step, cooling the mixture to a temperature of between 110 and 120 DEG C, adding trimellitic anhydride and diamine with the mol ratio of 2:1, and preserving the heat at a temperature of between 130 and 150 DEG C until the material is transparent; and after 1 hour of heat preservation, slowly heating the material to a temperature of between 200 and 205 DEG C until the acid value is no less than 30 mg KOG/g. Machine winding dipped by the solventless resin has the advantages of small volatilization loss, high filling rate, few times of paint dipping, short baking time, strong binding power, excellent performance of electrical appliance, environmental pollution reduction, and the like.

The invention discloses a micro-accelerometer and a preparation method thereof, belonging to the technical field of processing micro inertia devices. The micro-accelerometer is arranged on a package substrate which is formed by stacking an upper surface plate, a lower surface plate and a plurality of middle substrates, wherein a signal detection circuit of the micro-accelerometer is attached on the upper surface plate; a sensitive element of the micro-accelerometer is embedded in the middle substrates, i.e. the middle substrates with cavities form a frame of the sensitive element; a flexible hanger and a sensitive mass block of the sensitive element are arranged in the cavities, and one end of the flexible hanger is connected with the sensitive element, while the other end is fixed on the frame; metal electrodes are respectively sputtered on the sensitive mass block and the surface of the frame corresponding to the sensitive mass block so as to form a flat plate sensitive capacitor, or a metal piezoresistive thick-film pattern is deposited at a connecting part of the flexible hanger and the inner side surface of the frame so as to form a metal piezoresistive strain gauge. The micro-accelerometer has high sensitivity and high-temperature resistance and can be fused into a whole with a system level package substrate, thus the micro-accelerometer has low processing difficulty and cost.

The invention discloses a preparation method of a composite polytetrafluoroethylene nano-filtration membrane. After a hydrophobic polytetrafluoroethylene micro-pore membrane is activated, the composite polytetrafluoroethylene nano-filtration membrane is obtained by virtue of water-phase soaking and oil-phase soaking. The polytetrafluoroethylene micro-pore membrane has the characteristics that the strength is high and an additional supporting layer is not needed, and thus the membrane preparation process is relatively simple. Furthermore, by virtue of a unique node-fibril micropore structure of the polytetrafluoroethylene micro-pore membrane, the bonding strength between a base membrane and a nano-filtration modified layer is greatly improved, so that the performance of the composite nano-filtration membrane is improved. The prepared composite polytetrafluoroethylene nano-filtration membrane can be used for treating wastewater in severe environments of strong acid, strong alkali, high temperature and the like, and application occasions of an existing nano-filtration membrane are expanded.

The invention relates to an inorganic composite heat insulation material, which is prepared from the following raw materials in part by weight: 100 parts of common silicate cement, 10 to 30 parts of quick hardening sulfate aluminum cement, 10 to 30 parts of gypsum powder, 10 to 40 parts of admixture, 20 to 40 parts of mineral fiber, 150 to 200 parts of vitrified micro bubbles, 4 to 8 parts of re-dispersible latex powder, 2 to 4 parts of cellulose ether, 0.1 to 0.3 part of starch ether, 0.2 to 1.0 part of water reducing agent, 0.2 to 0.6 part of retarder, 1 to 3 parts of early strength agent, 0.5 to 3 parts of water repellent, and 0.02 to 0.06 part of air entraining agent. The raw materials are mixed uniformly to prepare dry powder, and the dry powder and water are mixed in a weight ratio of 1: (0.8-1.2) and stirred to form slurry for use. The inorganic composite heat insulation material has good workability, quick strength development, high construction efficiency, good adhesive property, low drying shrinkage, heat insulation, hydrophobic property, fire resistance and durability.

The invention relates to an inorganic nonmetal composite wave-absorbing material containing a graphene nano layer as well as a preparation method and application thereof. The material comprises the graphene nano layer and inorganic nonmetal, wherein the voltage of the graphene nano layer is 0.1-50 percent of that of the entire inorganic nonmetal composite wave-absorbing material. The preparation method comprises the following steps of: (1) mixing the graphene nano layer and the inorganic nonmetal; and (2) sintering mixed powder of the graphene nano layer and the inorganic nonmetal in as the way of normal pressure, hot pressing, hot isostatic pressing or discharge plasmas, and the like. The material has the characteristics of high temperature resistance, corrosion resistance and good wave absorption performance and improves the wave absorption effect while reducing surface reflection; and the preparation method is simple and suitable for industrialized production.

The invention provides a briquette binder and a briquette preparation method based on the binder. The binder comprises 45 to 75 mass percent of humic acid, 8 to 20 mass percent of bentonite, 5 to 18 mass percent of kaolin, 1 to 5 mass percent of quartz sand, 2 to 8 mass percent of quicklime, 0.1 to 2 mass percent of sodium chloride, 0.1 to 2 mass percent of potassium permanganate and 0.05 to 0.1 mass percent of polyacrylamide. The binder has a simple preparation process, low cost, convenient use and no any secondary pollution and is applicable to various types of coal. The process for preparing the briquette by using the binder comprises the following steps of: only making little pretreatment on raw material coal and the binder, mixing the raw material coal and the binder in proportion, adding water into the mixture, uniformly stirring, pressing the mixture into a cylindrical briquette by using a press machine, and air-drying or drying the cylindrical briquette. The briquette prepared by using the binder of the invention has the characteristics of high cold strength, high water resistance, low cost, low ash increment, high thermal strength, high sulfur retention rate and wide source of raw materials.

The invention discloses a watering spray gun with an automatically rotating shower nozzle. The watering spray gun with the automatically rotating shower nozzle comprises an upper spray gun body, a lower spray gun body, a throttling device, a speed regulating device, a steering device and the shower nozzle; the lower spray gun body is connected through the throttling device; one end of the speed regulating device is connected to the lower spray gun body through one end of a pipeline and the other end of the speed regulating device is connected to a P opening of the reversing valve through a water inlet pipe; the reversing device which is installed on the upper spray gun body comprises a water inlet pipe, a reversing valve, a valve block, a hydraulic cylinder, a reversing blocking block, a rack and a pinion; a first reversing blocking block and a second reversing blocking block are installed on the valve block; the end portion of a shifting rod of the reversing valve is arranged between the first reversing blocking block and the second reversing blocking block; the nozzle is installed on the upper spray gun body through a bearing. According to the watering spray gun with the automatically rotating shower nozzle, an electric element is avoided, the safety is high, and application occasions are wide; the valve block which is adopted plays a role as a pipeline for flowing between the reversing valve and the hydraulic cylinder, the hydraulic pipeline is simplified, and the device structure is compact.

The present invention discloses one kind of conductive plastic and its processing method and apparatus. The conductive plastic includes conductive fiber 0.1-45 vol%, thermoplastic plastic 55-99 vol% and machining assistant 0-3 vol%. The conductive fiber is arranged in 3D netted form homogeneously with multiple joining points, and the conductive plastic has high conductivity, high antistatic and electromagnetic shielding effect, and low surface resistance and volumetric resistivity, and may be injected, extruded and molded like common plastic.

The invention relates to a gadolinium-containing sintered neodymium-iron-boron rare earth permanent magnet alloy and a preparation method thereof. The permanent magnet alloy comprises components in the following formula: Re[alpha]Gd[beta]B[gamma]MxNyFe[100-alpha-beta-gamma-x-y], wherein the weight percentage beta of the gadolinium element is more than 0.50 and less than or equal to 25. Through the method for adding the Gd element into a sintered Nd-Fe-B magnet, a sintered Nd-Fe-B permanent magnet with high coercive force and high temperature resistance is prepared. The coercive force temperature coefficient beta of the prepared magnet is reduced, so the coercive force of the magnet at high temperature is improved and the magnet has the high temperature resistance.

The invention discloses a craft to spray ceramic on the surface of epoxide resin group carbon fiber composite material product, which comprises the following steps: A, proceeding roughening treatment for the surface of epoxide resin group carbon fiber composite material product; B, spraying metallic substratum on the roughening surface; C, spraying ceramic powder on the surface of metallic substratum; forming ceramic coating. This invention can increase the safe property and durability of the product, which can make epoxide resin group carbon fiber composite material possess wide application area.