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Oxide etching method
InactiveUS8168544B2Precise and easy etchingPrecise and highly selective wet etchingDecorative surface effectsFinal product manufactureAcetic acidEtching
Owner:CANON KK
Ceramic composite material of high temperature insulation sandwich structure and method for preparing ceramic composite material
ActiveCN102642350AImprove toughnessImprove thermal conductivityLaminationLamination apparatusOxide ceramicCeramic composite
Disclosed are a ceramic composite material of a high temperature insulation sandwich structure and a method for preparing the ceramic composite material. A core layer of the composite material is an aerogel composite material layer reinforced by high temperature resistant inorganic fibers, oxide ceramic composite material surface plates reinforced by high temperature resistant inorganic fibers are compounded on the upper surface and the lower surface of the core layer, the thickness of the core layer is larger than or equal to 2mm, and the thicknesses of the upper surface plate and the lower surface plate respectively range from 0.1mm to 3.0mm. The method for preparing the ceramic composite material of the high temperature insulation sandwich structure includes the steps: (1) selecting aerogel composite materials reinforced by the high temperature resistant inorganic fibers as materials of the core layer with the thickness larger than or equal to 2mm; (2) tiling high temperature resistant inorganic fiber cloth or thin-layer fabrics on the upper surface and the lower surface of the core layer to perform needling, puncture or sewing; (3) sucking sol in a vacuum manner and gelating the sol at the temperature of 30-200 DEG C; and (4) performing heat treatment. The ceramic composite material of the high temperature insulation sandwich structure integrates the functions of heat insulation, bearing, wave penetration and the like.
Owner:NAT UNIV OF DEFENSE TECH
Electromagnetic inching forming method and its device for plate moving coil
InactiveCN1821910AGood repeatabilityEasy energy control and automated productionProgramme controlComputer controlEngineeringElectromagnetic pulse
This invention relates to an electromagnetic progressive shaping method for plate moving coils and a device, in which, said device includes a computer control system, an electromagnetic force generation system and a three-shaft digital control shaping system including a plate clamping elevating device, a supporting model frame and an electromagnetic shaping clamping rod, in which, the computer controls the coil to move downward along the contour of a model profile from the top according to the contour data of the model profile and the plate is formed partly relying on the magnetic force of coil till to the bottom of the model and finish the entire process.
Owner:HUAZHONG UNIV OF SCI & TECH
Nanometer traditional chinese medicine microcapsule fabric finishing agent, preparation and fabric finishing method
InactiveCN101324026ANo side effectsEnhanced inhibitory effectFibre treatmentChemicalsNano zinc oxideNanometre
The invention discloses a microencapsulated nano fabric finishing agent of traditional Chinese medicines, which consists of following components by mass percent: 30 to 60 percent of a solution of the microencapsulated finishing agent of the traditional Chinese medicines, 5 to 20 percent of a nano zinc oxide solution, 10 to 15 percent of a aquosity polyurethane solution and 10 to 55 percent of deionized water which are equal to 100 percent in total. A preparation method of the microencapsulated nano fabric finishing agent comprises following steps: according to fabrics to be processed, the selected traditional Chinese medicines are soaked in ethanol, thus obtaining an extracted solution of the traditional Chinese medicines, polylactic acid, an emulsifying agent OP-10 and the extracted solution of the traditional Chinese medicines are produced into a microencapsulated solution of the traditional Chinese medicines with the solid content of 30 to 50 percent, commercial nano zinc oxide powder, tween-80 and the deionized water are adopted to produce a nano zinc oxide solution which is produced into the nano fabric finishing agent of the traditional Chinese medicines with the microencapsulated solution of the traditional Chinese medicines, the aquosity polyurethane and the deionized water. The microencapsulated nano fabric finishing agent of the traditional Chinese medicines can be used for fabric finishing and leading the finished fabrics to have better antisepsis and antivirus effects.
Owner:XI'AN POLYTECHNIC UNIVERSITY +2
Ultrahigh-performance plastic film as well as preparation method and composite material thereof
ActiveCN103724791AHigh tensile strengthReduce material usageSynthetic resin layered productsLaminationChemistryHigh-density polyethylene
The invention relates to an ultrahigh-performance plastic film as well as a preparation method thereof. The film is a one-layer structure of a multilayer structure. At least one layer structure in the film adopts the following formula by weight percent: 0 to 100 percent of metallocene linear low-density polyethylene, 0 to 100 percent of linear low-density polyethylene, 0 to 80 percent of low-density polyethylene, 0 to 60 percent of ultralow-density polyethylene, 0 to 60 percent of high-density polyethylene and 0 to 30 percent of additives. The invention also relates to a composite material which is prepared by compounding the ultrahigh-performance plastic film and a fiber material. When used as operation tablecloth, the composite material has the multiplied performance of the existing operation tablecloth, such as tensile strength, impact resisting strength, tearing resistance and the like.
Owner:SUZHOU ADDISON NONWOVEN PROD CO LTD
Oxide etching method
InactiveUS20090149030A1Simple and easy to carry outRemarkable selectivityFinal product manufactureDecorative surface effectsAmorphous oxideEtching
There is provided an etching method of an amorphous oxide layer containing In and at least one of Ga and Zn, which includes etching the amorphous oxide layer using an etchant containing any one of acetic acid, citric acid, hydrochloric acid, and perchloric acid.
Owner:CANON KK
Preparation method of activated carbon adsorption film and method for measuring bisphenol substances in wetland soil or sediment based on thin-film diffusion gradient technique
InactiveCN104492376AStrong toughnessLarge adsorption capacityOther chemical processesComponent separationSorbentBisphenol
The invention discloses a preparation method of an activated carbon adsorption film and a method for measuring bisphenol substances in wetland soil or sediment based on a thin-film diffusion gradient technique, and belongs to the fields of environmental sciences and earth sciences. According to the preparation method of the activated carbon adsorption film, the activated carbon adsorption film is prepared by mixing activated carbon as an adsorbent with agar, and then is overlapped on an agar diffusion film and a PTFE filter film to form a DGT device; after nitrogen introduction pretreatment, the DGT device is put into the wetland soil or the sediment to be tested for 24 hours, and then the activated carbon adsorption film is taken out and eluted by use of an eluent which is the mixed solution of methanol and sodium hydroxide; next, the adsorbing capacity of the bisphenol compounds in the adsorption film is measured and the concentration of the bisphenol substances in the wetland soil or the sediment is calculated according to the Fick's first law of diffusion. The preparation method of the activated carbon adsorption film is simple in process, the adsorbent is even in distribution, the adsorbing capacity is high and the quality guarantee period is long; the DGT technique based on the adsorption film is simple and easy to operate and the testing result is representative, and therefore, the DGT technique is suitable for in-situ detection of the bisphenol substances in the wetland soil or the sediment.
Owner:NANJING UNIV
Preparation method of nanometer composite film ammonia gas sensor
InactiveCN102788822AMild conditionsRaw materials are easy to getMaterial resistanceComposite filmIce water
A preparation method of a nanometer composite film ammonia gas sensor comprises the following steps: 1, taking 18-20 parts by weight of aniline monomers, dispersing the aniline monomers into deionized water, adding 0.1-3 parts by weight of graphene, and uniformly stirring; 2, adding 700-1000 parts by weight of 1mol / L hydrochloric acid to the mixed solution obtained in step 1, placing the obtained solution in an ice water bath, continuously stirring for 20-40min, adding a solution containing 456 parts by weight of ammonium persulfate, placing in the ice water bath, and reacting for 14-18h under stirring; 3, filtering, taking the obtained precipitate, respectively washing with the deionized water and alcohol, drying for 24-72h to obtain dry powder, dispersing the powder in an alcohol solution with the concentration of 15-40% (v / v), and carrying out ultrasound for 3-5h to obtain a uniform dispersion; and 4, coating the dispersion on an interdigital electrode, and obtaining the nanometer composite film ammonia gas sensor after the alcohol solution volatilizes. The sensor prepared through the preparation method has the advantages of high detection sensitivity, good stability, no need of a heating part, and realization of working at room temperature.
Owner:SOUTHWEST JIAOTONG UNIV
High temperature resistant and wear resistant lubricating paint
A refractory antiwear lubricating paint is prepared from thermosetting epoxy resin, boron modified phenolic resin, MoS2, Sb2O3 and cerium fluoride. Its advantages are high antiwear, load-bearing and lubricating performance, and excellent refractory performance.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method of reducing ammonia and nitrogen pollution in process of zeolite modification
ActiveCN100404432CLow modification costReduce usageWater/sewage treatment by ion-exchangeEnergy based wastewater treatmentReaction temperaturePotassium
This invention relates to a method to reduce ammonia nitrogen pollution during the modification process of zeolite. The method comprises, in the process, exchanging sodium in the zeolite with potassium compounds, and then exchanging zeolite with ammonium salts. The ratio of potassium compounds to zeolite is 0.01~0.5, reaction temperature is 5-100DEG C, and the reaction time is 0.1-6 hours. The method will not increase the modification cost and can reduce ammonium salt use by 50%, therefore reducing ammonia nitrogen pollution and the burden of ammonia nitrogen wastewater treatment process and investment. It is an environmental technology for zeolite modification. The prepared zeolite catalyst has lower sodium content with catalytic activity basically unchanged or increased.
Owner:PETROCHINA CO LTD
A WDM optical transmission system with automatic link gain adjustment and method thereof
InactiveCN1633057AThe wavelength optical signal output power is stableEasy to measureWavelength-division multiplex systemsUltrasound attenuationFiber
This invention relates to WDM light transmission system of a link gain automatic adjustment and an automatic adjust method. The invention detects a received light power of a light monitor channel wavelength at the lower-reach station of a given cross distance section and computes the fiber circuit loss of said section by the difference between sent light power of the upper reach station and the received light power of the lower reach station, then to adjust the light power attenuation value of the light adjustable attenuator of said section lower reach station based on the loss to match the circuit loss and the gain of light amplified relay.
Owner:FENGHUO COMM SCI & TECH CO LTD
Fluorine-containing polysiloxane rubber state composite gas separation membrane, preparation method and application thereof
ActiveCN102327747AMild preparation conditionsResistant to swellingSemi-permeable membranesDispersed particle separationCross-linkProduct gas
The invention discloses a fluorine-containing polysiloxane rubber state composite gas separation membrane, a preparation method and an application thereof. A porous polymer material is used as a support membrane, and a fluorine-containing polysiloxane material is coated on the surface of the support membrane. The preparation method of the fluorine-containing polysiloxane rubber state composite gas separation membrane comprises the following steps of: dissolving fluorine-containing polysiloxane into a solvent to prepare coating liquid; adding a cross-linking agent and a catalyst into the obtained solution; uniformly stirring, standing and de-foaming; coating the coating liquid on the porous support membrane; and heating, curing and cross-linking until the porous support membrane is dried to obtain the fluorine-containing polysiloxane rubber state composite gas separation membrane. The composite gas separation membrane provided by the invention can be applied to separations of oxygen gas from nitrogen gas, carbon dioxide from nitrogen gas, and organic vapors, and has the characteristics of swelling resistance, resistance to pressure, weather fastness, and the like.
Owner:DALIAN UNIV OF TECH
Polymer li-ion battery and the separator thereof
InactiveUS20130236765A1High mechanical propertiesHigh performance propertySecondary cellsCell component detailsPorous substrateLithium-ion battery
The invention pertains to the technical field of a polymer Li-ion battery, in particular to a polymer Li-ion battery separator, comprising porous substrate, wherein at least one surface of the porous substrate is coated with an inorganic coating and an organic coating; the organic coating, shaped like an island and / or linear distribution, is coated on the surface of the porous substrate and / or the inorganic matter coating.
Owner:NINGDE AMPEREX TECH +1
Low cost room temperature silicon sulfide rubber composition
Disclosed is a low cost room temperature vulcanized silicone rubber composition, wherein the constituents include (by weight portions): oligomeric polydimethylsiloxanol 80-120, cross linking agent 2-15, catalyst 0.005-0.1, filling material 3-100, addition agent 10-100.
Owner:GUANGZHOU GBS HIGH TECH & IND
Method and device for realizing antenna tuning
InactiveCN106299609APerformance unchangedImprove antenna efficiencySimultaneous aerial operationsAntenna supports/mountingsEngineeringImpedance matching
The invention relates to a method and a device for realizing antenna tuning. The method comprises the following steps: detecting whether a USB access event occurs or not; if yes, obtaining the current working frequency of an antenna, and a preset compensation tuning strategy which is corresponding to the current working frequency; adjusting an impedance matching network corresponding to the current working frequency according to the compensation tuning strategy, and making the offset of the antenna resonant frequency relative to the that of the resonant frequency before the USB access event in a set range under the effect of the adjusted impedance matching network. The method and the device for realizing the antenna tuning disclosed by the invention can compensate the offset of the antenna resonant frequency caused by insertion of USB to ensure a higher antenna efficiency.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Multi-functional built-in dynamic-static-pressure motorized spindle for efficient high-speed precision machine
InactiveCN103286678AReduce radiationAvoid Limiting AppsGrinding machine componentsThrust bearingGrinding wheel
The invention relates to a multi-functional built-in dynamic-static-pressure motorized spindle for an efficient high-speed precision machine. The multi-functional built-in moving piezo spindle comprises a shell, a spindle body, a bearing, an oil sealing cover, a motor rotor and a stator. A front bearing is arranged at the right end of the shell and forms a static-pressure push bearing with the spindle. The inner surface of the front bearing is provided with a static-pressure oil cavity, and part of the large diameter of the inner surface matches with a pre-tightening piston. A rear bearing is mounted in a rear-bearing seat. The motor rotor is arranged between the front bearing and the rear bearing. The outer cylindrical face of the motor stator matches with a water sleeve tightly. The water sleeve matches with a hole in the middle of the shell and is connected to the shell. The rear bearing is sealed through a gas sealing ring, and the front bearing is sealed through the oil sealing cover and a gas sealing hole at the rear end. Heat shielding devices are arranged at two ends of the motor stator. The spindle can be mounted at different positions according to different using conditions. The multi-functional built-in dynamic-static-pressure motorized spindle can serve as a spindle of a grinding wheel of a precision machine, a milling center or a grinding machine or a spindle of a workpiece, and has the advantages of high precision, high rigidity, long service life, fine producing process, good sealing effect and the like.
Owner:上海原创精密机床主轴有限公司
Diode laser beam collimation method
ActiveCN107346062APerformance unchangedImproved laser power delivery efficiencyICT adaptationOptical elementsLaser technologyDivergence angle
The invention belongs to the field of laser technology application, and provides a diode laser beam collimation method. A laser beam emitted by a diode laser is collimated by a convex cylindrical lens, a concave cylindrical lens and a convex lens in turn, and then is emitted into the atmosphere. The laser beam along the fast axis direction firstly passes through the convex cylindrical lens and is collimated into parallel light. Through the concave cylindrical lens, the beam in the fast axis direction is diverged again. The fast axis divergence angle of the output laser beam matches the receiving angle of the convex lens, which greatly improves the coupling efficiency of the fast axis laser beam. The size and divergence angle of a laser beam along the slow axis direction are not changed. The fast axis is placed perpendicular to the Scheimpflug plane. The slow axis is placed parallel to the Scheimpflug plane. Finally, the fast and slow axis laser beams are collimated by the convex lens and emitted into the atmosphere. According to the technical scheme provided by the invention, the coupling efficiency of the emitted light beams is improved under the condition of the same performance of the SLidar system.
Owner:DALIAN UNIV OF TECH
Trapping and detecting multiplexed scanning optical-tweezers system
InactiveCN102540447APerformance unchangedWon't deviateRadiation/particle handlingMaterial analysis by optical meansSystems designTrapping
The invention provides a trapping and detecting multiplexed scanning optical-tweezers system. The trapping and detecting multiplexed scanning optical-tweezers system works by the following steps of: scanning a conjugate surface of a back focal plane of an objective lens to trap light beams to form a pair of scanning optical tweezers; collecting trapped small ball scattering light spots on the back focal plane of the objective lens, and projecting the light spots of the back focal plane of the objective lens onto a four-quadrant detector in a conjugate imaging manner; multiplexing an optical path by a trapping optical path and a detecting optical path through a half-reflecting and half-transparent plane mirror; changing symmetry of light spots when particles deviate the center of a light trap so as to realize high-precision detection on the displacement of the particles; and realizing detection of the light beam on the displacement of the scanning optical tweezers because the conjugate image central position of the light spots of the particles on the back focal plane of the objective lens is still placed on a target surface of a detector when the optical tweezers scan. The trapping and detecting multiplexed scanning optical-tweezers system provided by the invention simplifies a system design of the traditional scanning optical tweezers and also keeps the detection of the optical tweezers at different scanning positions so as to realize requirements on high-precision detection.
Owner:UNIV OF SCI & TECH OF CHINA
Thermosetting lignin-based polyurethane elastomer suitable for cyclic processing and preparation method thereof
The invention belongs to the technical field of polyurethane elastomers and discloses thermosetting lignin-based polyurethane elastomer suitable for cyclic processing and a preparation method thereof.The thermosetting lignin-based polyurethane elastomer is made from partially-depolymerized lignin reacting with polyurethane prepolymer; the partially-depolymerized lignin is prepared by dissolving lignin in an alkaline liquid, boiling under the concentration of 1-30% by weight, 140-280 DEG C and 0.4-2.0 MPa, and depolymerizing. The partially-depolymerized lignin is used herein to prepare the polyurethane elastomer which is better compatible with polyurethane matrix; reinforcement effect is provided; good ultraviolet resistance and aging resistance are imparted to the polyurethane elastomer;the problem that traditional lignin-based polyurethane elastomer is unsuitable for multiple cyclic processing is solved; after being processed many times, the elastomer herein has substantially unchanged performance.
Owner:SOUTH CHINA UNIV OF TECH
Supporting structure for composite anchor mesh steel bar support of deep well high-stress soft rock roadway and construction method thereof
InactiveCN106761811AImprove stabilityAvoid loose damageUnderground chambersTunnel liningSupporting systemShotcrete
The invention provides a supporting structure for a composite anchor mesh steel bar support of a deep well high-stress soft rock roadway and a construction method thereof. Firstly, anchor rods and anchor ropes are stroke into the interior of surrounding rock, and the set length is exposed; then, steel bar meshes and polyester fiber meshes are laid and hung through the outward-exposing portion of the anchor rods and the anchor ropes, the steel bar meshes are closely attached to the surrounding rock to be laid, and the polyester fiber meshes are closely attached to the steel bar meshes to be laid; a steel bar mesh shell support is erected; the anchor rods and the anchor ropes pass through the steel bar meshes, the polyester fiber meshes and the steel bar mesh shell support in sequence and are fixed on the steel bar mesh shell support through trays and nuts; a first concrete shotcrete layer is poured to close the whole supporting structure, and initial supporting is finished; and finally, a second concrete shotcrete layer is poured, and second supporting is finished. Through initial supporting, the whole structure and the surrounding rock deforms jointly, the yielding effect is given play, and surrounding rock pressure is released, and then second supporting is conducted. Meanwhile, the flexibility and pressure releasing effects of the polyester fiber meshes are utilized, so that the surrounding rock pressure is evenly distributed in the whole supporting system.
Owner:ANHUI UNIV OF SCI & TECH
Underfill adhesive, as well as preparation method and application thereof
InactiveCN104559808ALow halogen contentImprove performanceNon-macromolecular adhesive additivesMacromolecular adhesive additivesEpoxyAdhesive
The invention belongs to the technical field of adhesives, and particularly relates to an underfill adhesive, as well as a preparation method and application thereof. The underfill adhesive comprises 100 parts of an epoxy resin mixture, 20 to 100 parts of epoxy modified acrylate resin, 5 to 50 parts of a latent curing agent, 5 to 30 parts of an epoxy active diluting agent, 5 to 60 parts of acrylic ester, 0.1 to 5 parts of a thermal initiator and 0.1 to 10 parts of an additive. According to the underfill adhesive, as well as the preparation method and application thereof, epoxy modified acrylate resin is used as a bridging agent to bind an epoxy resin curing system and an acrylic ester curing system, so that high performance of epoxy resin can be achieved, and the viscosity can be greatly reduced by acrylic ester without changes in performance.
Owner:东莞市腾威电子材料技术有限公司
Adsorption film capable of selectively fixing hexavalent chromium ions and preparation method thereof
ActiveCN105080519AGood choiceHigh selectivityOther chemical processesWater contaminantsMethyl groupGlass sheet
Owner:NANJING UNIV
Preparation method of carbon nanotube compounded lubricating oil
InactiveCN1730631AImprove lipophilicityLower surface energyAdditivesPigment treatment with non-polymer organic compoundsVacuum pumpingCarbon nanotube
Disclosed is a preparation method of carbon nanotube compounded lubricating oil which comprises the steps of, mixing carbon nano tube and oleic acid by the mass ratio of 1:2-10, charging into toluenesulfonic acid solution for supersonic dispersion, heating and returning flow 0.8-2h, vacuum-pumping filtering, cleaning the obtained precipitate with alkane solvents, flushing to neutral with deionized water, vacuum drying at 40-100 deg C, obtaining carbon nano tube with coated oleic acid, charging carbon nano tube into lubricating oil by the proportion of 0.05-2:98-99.95, supersound dispersing at 50-90 deg C, the lubricating oil is any one selected from conventional diesel engine oil, cylinder oil and gear oil for vehicle.
Owner:HUNAN UNIV
Glycerin distillation residue treatment method
The invention discloses a glycerin distillation residue treatment method. The glycerin distillation residue treatment method sequentially comprises the following steps: adding an extracting agent to glycerin distillation residues, stirring and filtering out inorganic salt; distilling so as to remove the extracting agent; adding water for dilution, heating to 60-95 DEG C; adding an acidifying agent so as to adjust the pH value to 2.5-6; standing still, and skimming; adding an alkaline solution so as to adjust the pH value to 8-10, thus obtaining a mixed liquid of glycerin, polymerization glycerin and water. The mixed liquid prepared by the method falls in the protection scope of the invention and is applied in a cement grinding-aid reinforcing agent.
Owner:JIANGSU JUWEI NEW MATERIALS
High-efficiency visible light response amorphous plasma heterojunction nano TiO2 sol
ActiveCN106914236AImprove photocatalytic performanceBroaden the photoresponse rangeAntifouling/underwater paintsWater/sewage treatment by irradiationPrecious metalSemiconductor
The invention discloses an amorphous plasma heterojunction nano TiO2 sol having high-efficiency visible light response as well as a preparation method and an application thereof. The amorphous plasma heterojunction nano TiO2 sol is formed by taking a heterojunction structural body formed by precious metals and nano TiO2, or other semiconductor-precious metals and nano TiO2 by chemical connection as nano particles, schottky junction generated by cooperation among precious metals and nano TiO2 or other semiconductor-precious metals and nano TiO2 is used for performing resonance effects with local surface plasma to obtain the excellent visible-light photocatalysis effect, and the problem of low visible-light utilization rate of common TiO2 photocatalysts can be solved.
Owner:FUZHOU MINGGU NANOMETER SCI & TECH
Stable single-component epoxy surface mount adhesive in room temperature storage and preparation method thereof
InactiveCN101760162AGood printability and consistencyImprove wet strengthEpoxy resin adhesivesChemistryAdhesive
The invention discloses a stable single-component epoxy surface mount adhesive in room temperature storage and a preparation method thereof. The surface mount adhesive comprises the following components according to parts by weight: 30-45 parts of epoxy resin, 10-25 parts of epoxy diluent, 20-35 parts of latent curing agent, 0.5-2.0 parts of stabilizer, 5-15 parts of thixotropic agent, 15-30 parts of filler and 0.1-1.0 part of pigment. The preparation method comprises the following steps: (a) adding the epoxy resin, reactive diluent, the filler, the pigment and the stabilizer into a reactor for uniform mixing sequentially; (b) adding the latent curing agent into the above mixture for uniform mixing; and (c) adding the thixotropic agent for uniform dispersing and vacuum defoaming treatment.
Owner:TONSAN ADHESIVES INC
Adaptive quantized analog-to-digital converter
ActiveCN104660261AImprove accuracyPerformance unchangedAnalogue/digital conversionElectric signal transmission systemsShift registerDigital down converter
The invention discloses an adaptive quantized analog-to-digital converter. A comparing unit compares an analog input signal with a feedback reference signal, and outputs comparative results to M shifting registers and a division accumulation unit; the shifting registers store the comparative results from the comparing unit in a clock sequence, and output M parallel-by-bit data to an adaptive quantized arithmetic unit; the adaptive quantized arithmetic unit determines an initial quantized value according to the M parallel-by-bit data output by the M shifting registers, and outputs the initial quantized value to the division accumulation unit; the division accumulation unit divides the initial quantized value by 2 from the first comparison to M comparison by the comparing unit, and outputs a result obtained by accumulation or decreasing to the input end of a digital-to-analog converting unit and the output end of the analog-to-digital converter; and the digital-to-analog converting unit performs digital-to-analog conversion on the output result of the division accumulation unit and outputs to the negative input end of the comparing unit.
Owner:SHANDONG GETTOP ACOUSTIC
Wet chemical prepn process of leadless functional barium titanate ceramic film
InactiveCN1350071AGood dielectricExcellent ferroelectricPiezoelectric/electrostrictive device manufacture/assemblyLiquid/solution decomposition chemical coatingBarium titanateSolvent
The method for preparing barium zirconate titanate (BZT) film belongs to the field of functional ceramic film. Its precursor liquor for preparing BZT is made up by using barium acetate, zirconium propylate and butyl titanate as raw material, using glycol methyl ether as solvent and using acetylacetone and glacial acetic acid as stabilizing agent according to the gran molecular concentration mixing ratio of Ba:Zr:Ti=I:X:1-X (X is greater than or equal to O and is less than or equal to 1), and its concentration is 0.2-0.3M. The above-mentioned precursor is undergone the process of filting, film-forming, whirl coating (its speed is 3000-4000 rpm and time is 30 sec.), pretreating, multiple film-forming, pretreating and film-forming to reach to required thickness, and annealing at 650-750 deg.c so as to obtain the invented product. The lead-free BZT functional film prepared by said ivnention possesses good dielectric feeraelectric and piezoelectric properties.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Wearproof ceramic tile and preparation method thereof
InactiveCN106220144ANot easy to scratchMaintain surface glossCeramic materials productionClaywaresCeramic tilesAluminium
The invention discloses a wearproof ceramic tile. The wearproof ceramic tile is prepared from the following raw materials in parts by weight: 15-30 parts of kaolin, 20-35 parts of ceramic waste, 15-35 parts of calcined quartz stone, 10-15 parts of bauxite, 3-9 parts of brown fused alumina, 5-8 parts of talcum powder, 2-10 parts of clay and 0-5 parts of methylcellulose. The invention also discloses a preparation method of the wearproof ceramic tile. By adopting the wearproof ceramic tile disclosed by the invention, the advantages of wear resistance, scratch resistance and environmental friendliness can be realized, production cost can be reduced, and service life of the ceramic tile is prolonged.
Owner:佛山市寰田陶瓷有限公司
Production process of luminous ceramic product
The invention discloses a production process of a luminous ceramic product, which belongs to the field of production processes of ceramic materials, and particularly relates to a production process of a luminous ceramic product. A manufacturing process comprises the steps of manufacturing a luminous glaze material, printing, burning, reshaping and the like. The luminous ceramic product disclosed by the invention is a high-technology environment-friendly product, has unique decorating and warning functions, can be widely applied to warning sign systems and emergency evacuation systems of various public utilities, and can be specifically applied to places such as stairs, passages, wall sides, door number plates, floors, decks, lifeboats, buoyant apparatuses, firefighting devices and the like. The luminous ceramic product has the advantages of super-long afterglow, high weather resistance, no influence of weather on the luminous time, acid resistance, alkali resistance, and no change in 100 years.
Owner:张云龙
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