Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

101results about How to "Dense high" patented technology

High purity zirconium boride / hafnium boride and preparation of superhigh temperature ceramic target material

ActiveCN101468918AAvoid the disadvantages of poor dry mixingEnsure safetyBorideHafnium
The invention discloses a method for preparing a high-purity ultrahigh-temperature ceramic target material which belongs to the technical field of ceramic target materials, and in particular provides a method for preparing high-purity zirconium / hafnium boride powder and a ceramic target material thereof. The method comprises the steps of taking high-purity Zr powder, Hf powder and high-purity B powder as raw materials, adopting a self-propagating method to prepare high-purity ZrB2 and HfB2 powder respectively and then adopting a high-temperature high-pressure hot-pressing molding process to prepare a high-purity dense zirconium / hafnium boride ultrahigh-temperature ceramic target material, wherein the relative density of the target material reaches 95 to 99 percent. Relative to the prior art, metal powder in the method is slightly excessive when the materials are mixed, so as to make up for the metal loss during self-propagating reaction and further guarantee the component unicity of products. Relative to pressureless sintering, the sintering temperature needed in the method is greatly lowered; in addition, as the hot-pressing process adopts two-stage temperature, blank is uniform in temperature field, so as to ensure that the target material with uniform density can be obtained in the late hot-pressing process.
Owner:有研资源环境技术研究院(北京)有限公司

Method of manufacturing liquid discharge head and method of manufacturing substrate for liquid discharge head

A method of manufacturing a liquid discharge head including a pressure generating chamber communicated to a discharge port for discharging liquid and a piezoelectric element which is provided corresponding with the pressure generating chamber and includes a piezoelectric material film and a pair of electrode films sandwiching the piezoelectric material film, including: a step of preparing a structure with a single crystal Si layer being accumulated above a front surface of an Si substrate through an etching stop layer; a step of forming a buffer layer on the above described single crystal Si layer; a step of forming, above the above described buffer layer, the above described piezoelectric material film consisting of a single crystal thin film or a thin film which is directed in a preferential orientation to a direction of the polarization through one of the above described pair of electrode films; a step of forming the above described pressure generating chamber on the above described piezoelectric material film; and a step of etching a location corresponding with the above described piezoelectric material film of the above described Si substrate from a rear surface of the above described Si substrate to reach the above described etching stop layer.
Owner:CANON KK

Wellhead high-pressure-spraying agentia adding method and device for water injection wells

The invention discloses a wellhead high-pressure-spraying agentia adding method and device for water injection wells. The wellhead high-pressure-spraying agentia adding method and device are designed for fixed-point agentia adding for the single water injection well and unpowered agentia adding at a high-pressure wellhead, namely, one end of a negative-pressure generating cavity is connected with a pressure pipeline with a nozzle, the other end of the negative-pressure generating cavity is sequentially connected with a throat pipe, a diffuser and a discharge pipe, and two ends of an agentia adding pipeline are respectively connected with an agentia storage tank and the negative-pressure generating cavity. The wellhead high-pressure-spraying agentia adding method includes that an anti-corrosion coating layer is surfaced on the inner wall of the nozzle at first, then a spraying device is arranged at the wellhead, high-pressure fluid is input so as to enable the negative-pressure generating cavity to generate negative pressure, and liquid agentia is sucked into the throat pipe and is injected into the water injection well through the discharge pipe after energy conversion. The wellhead high-pressure-spraying agentia adding method is simple to operate, energy-saving and lower in consumption. Technical process and the device are simplified. Since no motion parts are installed in the nozzle, the high-pressure-spraying agentia adding device is reliable to operate, leakproof and low in cost. The anti-corrosion coating layer of the nozzle has high density and uniformity, is resistant to washout and high pressure, can effectively protect the base body of the nozzle, and is easy to process and low in maintenance workload, and the service life of the device can be prolonged by 5-10 times of that of existing devices.
Owner:PETROCHINA CO LTD

Organosilicon epoxy acrylic acid modified waterborne alkyd resin emulsion and coating thereof

The invention provides an organosilicon epoxy acrylic acid modified waterborne alkyd resin and a coating thereof; the formula of the coating comprises the components in parts by mass: 40-50 parts of an organosilicon epoxy acrylic acid modified waterborne alkyd resin emulsion comprising the components of 45-65 parts of tung oil, castor oil or linseed oil, 25-45 parts of phthalic anhydride, trimellitic anhydride or trimellitic anhydride, 3-10 parts of xylene, 5-10 parts of epoxy ester and 5-10 parts of organosilicon ester; 3-4 parts of a pigment; 6-26 parts of a packing; 10-20 parts of deionized water; 0.05-0.5 part of a dispersant; 0.1-0.3 part of a defoaming agent; and 0.9-2.5 parts of a drier. The preparation method of the emulsion comprises the steps: heating oil, glycerol, pentaerythritol and trimethylolpropane with nitrogen protection, adding an alcoholysis catalyst, heating up, keeping a reaction until the ethanol tolerance degree reaches 2.0-5.0 ml/100 ml, and cooling; adding anhydride and xylene; adding organosilicon ester and epoxy ester, and modifying; and adding acrylate, and modifying; and cooling, and dispersing the mixture for two times. The coating has the advantages that easily-volatile organic compounds are reduced with water as a diluent.
Owner:盘锦辽河油田金宇生态环境有限公司

Multilayer combined type vacuum stone molding device

The invention relates to a multilayer combined type vacuum stone molding device which solves the problems that the traditional stone molding device only can mold stones piece by piece, the solidification is carried out in addition, molded composite boards are uncompacted, are easy to buckle and deform, and the like. The device is characterized in that an oil cylinder or an air cylinder with a hold-down device are arranged on the top of a vacuum tank; a supporting spring and 2 to 6 vibrators with 50-300Hz of frequency are arranged at the bottom of the vacuum tank; a plurality of layers of mold boards which are arranged in a stacked manner are also arranged in the vacuum tank; and a plurality of compression springs are arranged among each layer of the mold boards. The excitation force generated from the lower parts of the vibrators and the low-frequency excitation force generated from the upper part of the vacuum tank are matched with the compression springs among the mold boars and the supporting spring at the bottom of the vacuum tank to jointly form a vibration process of amplitude variation thereof, and the molding and the solidification are integrally carried out, thereby improving the working efficiency and restricting the problem that the composite boards buckle and deform in the solidification process. The multilayer combined type vacuum stone molding device is suitable for vacuum glue permeation of minerals such as quartz jade material and the like and the molding of spliced composite boards.
Owner:佛山市龙美达石业有限公司

A kind of synthetic magnesium calcium sand and preparation method thereof

InactiveCN102285806AHigh purityNo damage to high temperature performanceCalcium hydroxideMechanical press
The invention relates to synthetic calcium magnesite and a preparation method thereof. The preparation method comprises the steps of firstly carrying out ball milling on 25-30wt% of calcium hydroxide and 70-75wt% of magnesium hydroxide to reach the grain size within 30 mu m, heating the ball-milled mixture in a muffle furnace to 700-900 DEG C, and insulating heat for 0.25-0.5 hour; adding water the amount of which is 20-25wt% of the mixture to the calcined mixture, and digesting for 1-2 hours; and then adding an additive the amount of which is 1-3wt% of the digested mixture to the digested mixture, stirring, carrying out mechanical press shaping by a semi-dry method, naturally drying for 12-15 hours, baking at the temperature of 100-120 DEG C for 12-15 hours, finally firing in a high-temperature furnace at the temperature of 1600-1750 DEG C, insulating heat for 3-5 hours and crushing to obtain the synthetic calcium magnesite. The preparation method provided by the invention has the advantages of simple process and no need for special synthesis equipment and treatment technology. The synthesized calcium magnesite has the characteristics of high purity, wide application range, good sintering performance, good hydration resistance, and no influence on high-temperature use performance.
Owner:WUHAN UNIV OF SCI & TECH

Nano water-based functional ceramic composite coating and preparation method thereof

The invention discloses a nano water-based functional ceramic composite coating which comprises raw materials in parts by weight as follows: 10-35 parts of silicate inorganic adhesives, 10-35 parts of main filler, 2-10 parts of stabilizing materials, 5-20 parts of toughness-enhancing emulsion type binding agents, 3-10 parts of film forming assistants and 5-25 parts of water. A preparation method comprises the steps as follows: the silicate inorganic adhesives and diluent are poured into a container and stirred at 350-400 r/min for 10-20 min, so that a mixed liquid is obtained; the main filler and the stabilizing materials are added to the mixed liquid, and the mixture is stirred at 350-400 r/min for 50-60 min; and the toughness-enhancing emulsion type binding agents and the film forming assistants are added sequentially, and the mixture is filtered by gauze with 400-600 meshes, so that the composite coating is obtained. A film of the coating is formed at the normal temperature, and the nano water-based functional ceramic composite coating has the characteristics of infiltration, large adhesive force, high density, stone hit resistance, impact resistance, high and low temperature resistance, superior abrasion resistance, washing resistance and good flexibility.
Owner:WUHAN ZHUOYI TECH DEV CO LTD

Method for hot-pressing and sintering alumina-based eutectic composite ceramic materials

InactiveCN107032767AEliminate grain boundariesElimination of interfacial amorphous phaseCeramic compositeGranularity
The invention discloses a method for hot-pressing and sintering alumina-based eutectic composite ceramic materials. The method includes the steps: preparing rod-like eutectic samples with small and uniform tissues by the aid of laser suspension zone melting-directional solidification technology; performing crushing and screening to obtain eutectic powder with inner eutectic structures; preparing the alumina-based eutectic composite ceramic materials with inner eutectic structures in a hot-pressing and sintering manner. The prepared sintering eutectic composite materials reserve eutectic structures in initial eutectic samples and eliminate most of crystal boundary and interface non-crystal phases, so that a new idea is provided for preparation of large alumina-based eutectic composite ceramic materials. According to the method, the tissues are typical 'hieroglyphic' eutectic morphologies, the particle size of eutectic particles ranges from 4mum to 25mum and larger than gaps between eutectic layer sheets, so that the eutectic particles effectively reserve eutectic structures, and the large-block eutectic composite ceramic materials are prepared, high in melting point, close to full density and provided with inner approximately full-eutectic structures.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Composite heavy anti-corrosion structure for thermal power plant titanium plate chimney and construction technology

The invention belongs to the technical field of anti-corrosion materials, and particularly relates to a composite heavy anti-corrosion structure for a thermal power plant titanium plate chimney. The composite heavy anti-corrosion structure for the thermal power plant titanium plate chimney is arranged on a titanium plate chimney body, the titanium plate chimney body comprises multiple titanium plates which are welded together, a nano composite emulsion titanium plate substrate coating and at least one light curing fiber reinforcement composite layer, and the nano composite emulsion titanium plate substrate coating and the light curing fiber reinforcement composite layers are sequentially arranged on the welding seams of the multiple titanium plates and used for closing the welding seams. The composite heavy anti-corrosion titanium plate chimney has the advantages of being excellent in mechanical strength, high in electrical insulation and thermal insulation, high in temperature resistance, good in heat shock resistance, small in expansion coefficient and the like; chemosmosis can be well prevented, a base material is prevented from making contact with the outside world to the maximum extent, and the long-time stability of the base material is guaranteed; the construction time can be greatly shortened, and the construction difficulty and labor cost can be greatly lowered.
Owner:WELLABLE NEW MATERIALS ENG CO LTD SHISHI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products