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117 results about "Quartz fiber" patented technology

Quartz fiber is a fiber created from high purity natural quartz crystals. It is made by first softening quartz rods (in an oxyhydrogen flame) and then creating filaments from the rods. Since natural quartz crystals of high purity are rare, quartz fiber is more expensive than alternatives (glass fiber and high silica fiber) and has limited applications.

Quartz fiber glass bead defect detection method and system based on microscopic imaging

According to the quartz fiber glass bead defect detection method and system based on microscopic imaging, since the glass beads are of a three-dimensional structure, the internal defects of the glass beads can be distributed at different heights, and the defects of the glass beads can be detected by carrying out region division on the whole disc of quartz fiber glass beads, determining different focal planes and carrying out microscopic scanning on different regions on each focal plane in sequence. Acquiring a plurality of focal plane images corresponding to different focal planes of the whole disc of quartz fiber glass beads, and splicing the same focal plane images corresponding to different areas to ensure that all potential defects of the quartz fiber glass beads are imaged; and then defects in the image are identified, positioned and classified by using deep learning, so that manual subjective errors are avoided, and the detection efficiency and accuracy are remarkably improved.
Owner:SHANDONG ALESMART INTELLIGENT TECH CO LTD

Insulating ceramic material, preparation method thereof and application of insulating ceramic material in semiconductor heater

The invention discloses an insulating ceramic material, a preparation method thereof and application of the insulating ceramic material in a semiconductor heater. The insulating ceramic material comprises the following raw materials in parts by weight: 70-80 parts of aluminum oxide, 20-30 parts of boron nitride, 1-2 parts of magnesium oxide, 2-3 parts of quartz fiber powder and 4-6 parts of a modifier, the preparation method of the modifier comprises the following steps: reacting sodium alginate with 3, 3 '-dithiobis (4-aminobenzoic acid) to generate a first intermediate, reacting the first intermediate with polyacrylic acid to generate a second intermediate, and generating the modifier from the second intermediate under the action of aluminum chloride. The insulating ceramic material disclosed by the invention has excellent mechanical property, heat-conducting property and insulating property, and can remarkably improve the working performance of the semiconductor heater and prolong the service life of the semiconductor heater when being applied to the semiconductor heater.
Owner:SUZHOU XWC ELECTRONIC TECH CO LTD

Quartz fiber reinforced PEEK resin-based wave-transparent composite material and forming method

The invention relates to a quartz fiber reinforced PEEK resin-based wave-transparent composite material and a forming method thereof, and the forming method comprises the following steps: uniformly coating a layer of PEEK resin powder on quartz fiber cloth, repeatedly laying the quartz fiber cloth and the PEEK resin powder in a laminated manner, arranging quartz fibers on the uppermost layer to finish laying, and compacting to obtain a preformed blank; carrying out compression molding on the preformed blank: heating to 280-320 DEG C from room temperature, carrying out first-stage heat preservation, pressurizing after the first-stage heat preservation is finished, and carrying out first pressure maintaining treatment; the temperature is increased to 390-410 DEG C, second-stage heat preservation is carried out, pressurization is carried out after second-stage heat preservation is finished, and second pressure maintaining treatment is carried out; and heating to 420-435 DEG C, carrying out third-stage heat preservation, and after the third-stage heat preservation is finished, pressurizing and exhausting to obtain the composite material. According to the invention, one-time layering is combined with multi-section heating and other operations to realize blank compression molding, and the obtained composite material is good in interlayer combination and has good mechanical properties and wave-transparent properties.
Owner:HUBEI SANJIANG HANGTIAN JIANGBEI MASCH ENG CO LTD

Polyimide composite material and preparation method thereof

PendingCN121108740APolymer sciencePolyamide
The invention discloses a polyimide composite material and a preparation method thereof, and relates to the technical field of functional composites.The polyimide composite material is composed of hollow quartz fibers and silicon-containing polyimide resin, the fiber volume content of the polyimide composite material is 45%-60%, and the density of the polyimide composite material is 1.25-1.55 g / cm < 2 >; wherein the silicon-containing polyimide resin is formed by polymerizing a mixture of aromatic dianhydride, aromatic diamine and diamine containing a siloxane structure, and an end-capping reagent. The preparation method comprises the following steps: synthesizing a polyamide acid solution, preparing a prepreg by preimpregnation, performing by a vacuum bag method, performing hot-pressing curing and performing high-temperature post-treatment. Through collaborative innovation of the components and the process, the preparation method is simple, and the composite material has ultralow density, ultrahigh heat resistance, low dielectric constant and high strength and is suitable for the fields of aerospace, 5G communication, semiconductors and the like.
Owner:SICHUAN ZHONGZI ENVIRONMENTAL PROTECTION EQUIP CO LTD

Cable with co-extruded self-foaming ceramic fireproof layer and preparation method thereof

The invention discloses a cable with a co-extrusion self-foaming ceramic fireproof layer and a preparation method of the cable, and belongs to the technical field of polyolefin cables. The cable comprises a conductor, an insulating layer and a fireproof layer from inside to outside, comprising the following raw materials: 40-60 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of a polyolefin elastomer, 20-30 parts of a ceramic precursor filler, 5-10 parts of a compatilizer, 5-10 parts of a cosolvent, 3-5 parts of a flexibilizer, 2-4 parts of a main foaming agent, 1-2 parts of an auxiliary foaming agent, 1-3 parts of a lubricant and 0.5-1.5 parts of an antioxidant. The compatilizer is siloxane containing sulfydryl and phosphaphenanthrene groups, and the flexibilizer is silane coupling agent modified quartz fibers containing double bonds. In a matrix of the ethylene-vinyl acetate copolymer and the polyolefin elastomer, the compatilizer and the flexibilizer are added, so that the fireproof layer is endowed with better impact resistance and flame retardance.
Owner:GUANG DONG LI GUANG DIAN QI SHI YE YOU XIAN GONG SI

System for detecting and analyzing water-soluble heavy metals in ecological system based on machine learning

The invention discloses a system for detecting and analyzing water-soluble heavy metals in an ecological system based on machine learning. The system is used for detecting water-soluble harmful heavy metal elements in atmospheric particulates. The system comprises a sampling preprocessing module, an electrochemical detection module, a machine learning analysis module and a data verification output module which are connected in sequence, the sampling pretreatment module is used for collecting PM2.5 and PM10 particles by adopting a quartz fiber filter membrane and carrying out dissolving and filtering pretreatment; the electrochemical detection module is used for heavy metal enrichment and detection; the machine learning analysis module adopts an improved CNN (Convolutional Neural Network) to automatically identify the volt-ampere spectrogram, and establishes a nonlinear mapping model of the relationship between the metal ion concentration and the peak current; and the data verification output module performs quantitative analysis by adopting a standard addition method, and compares and identifies the pollution source through a multi-element fingerprint feature database. According to the invention, eight heavy metal elements such as Cd, V, Cr, Ni, Se, As, Mn and Pb can be detected at the same time, the detection range is 0.1-1000 [mu] g / L, and intelligence and automation of heavy metal detection are realized.
Owner:INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI

All-silica fiber Fabry-Perot sensor and manufacturing method thereof

The invention discloses an all-silica optical fiber Fabry-Perot sensor and a manufacturing method. The sensor is composed of a silica optical fiber, a quartz tube, a reflector, an optical fiber tail cable and an optical fiber connector. Wherein the core structure quartz optical fiber, the quartz tube and the reflector are all made of quartz materials, and the quartz optical fiber and the quartz tube are connected through laser welding to form a full-quartz structure, so that maximum thermal expansion coefficient matching is realized, the packaging internal stress of the sensor is reduced, and the working temperature upper limit and the measurement precision are improved. According to the optical fiber sensor, Fabry-Perot interference is formed through reflected light of the end face of the optical fiber and the end face of the reflector, the optical fiber temperature, strain and pressure sensor of a full-quartz structure can be formed by replacing the reflector and changing the connection relation between the reflector and the quartz tube, and the universality is high.
Owner:BEIJING RES INST OF TELEMETRY

Heat-conducting composite material as well as preparation method and application thereof

The invention belongs to the technical field of heat-conducting composite materials, and discloses a heat-conducting composite material which is a quartz fiber felt matrix reinforced epoxy resin composite material. The epoxy resin composite material is prepared from the following components in parts by mass: 100 parts of epoxy resin, 20 to 80 parts of epoxy group grafted aluminum oxide microspheres, 10 to 50 parts of hydroxyl-rich boron nitride nanosheets, 4 to 10 parts of a curing agent and 0.3 to 1 part of an accelerant. The surface modifier with an epoxy functional group is adopted to eliminate the interface thermal resistance of an inorganic micro-nano composite structure (spherical and lamellar) material, the interface strength and fusion of the filler and a resin matrix are improved, the heat conductivity coefficient of the composite material can be efficiently improved, and the composite material shows high insulating property and mechanical property.
Owner:SHANDONG JINGWEIYUAN NEW MATERIAL TECH CO LTD

Modified quartz fiber cloth, high-frequency copper-clad plate as well as preparation method and application of high-frequency copper-clad plate

The invention discloses modified quartz fiber cloth, a high-frequency copper-clad plate as well as a preparation method and application of the high-frequency copper-clad plate, and belongs to the technical field of copper-clad plates. The modified quartz fiber cloth comprises quartz fiber cloth and a rough layer positioned on the surface of the quartz fiber cloth, and the rough layer is formed by stacking nano silicon dioxide particles. The preparation method of the modified quartz fiber cloth comprises the following steps: soaking quartz fiber cloth in silicon dioxide sol, then drying, soaking in a coupling agent, and then drying. The copper-clad plate containing the modified quartz fiber cloth and a fluorine-containing resin functional layer has high interlayer binding force, layering or degumming can be effectively avoided, and the high-frequency copper-clad plate can meet the requirements for heat conduction, low dielectric loss and high peel strength at the same time.
Owner:SOLOMON (CHANGZHOU) ALLOY NEW MATERIAL CO LTD

In-situ growth nanowire skeleton reinforced aerogel composite material and preparation method thereof

The invention relates to an in-situ nanowire skeleton reinforced aerogel composite material and a preparation method thereof. The preparation method comprises the following steps: in-situ growth of a nanowire skeleton from quartz fiber felt, preparation of silica sol, sol impregnation and aging, and supercritical drying. The internal pores of the prepared nanowire skeleton reinforced aerogel composite material are refined and segmented by an in-situ grown nanowire network, the interface bonding of nanowires and aerogel is improved through interlocking, fracture under the action of external force is prevented, the structural performance of the aerogel composite material is improved, and the performance of the aerogel composite material is improved. The high-temperature-resistant and low-thermal-conductivity nanowire porous framework composite silicon oxide aerogel thermal insulation material is prepared by a simple and controllable process.
Owner:FEIDU AEROSPACE TECH CO LTD

Thin-wall gradient thermal protection structure and application

The invention relates to the technical field of thermal protection composite materials, in particular to a thin-wall gradient thermal protection structure and application. The thermal protection structure sequentially comprises, along a thickness direction, an outer surface layer; the ablation-resistant layer is composed of at least one layer of quartz fiber cloth, and the distance d between the outer side face of the quartz fiber cloth and the outer surface layer is larger than 0 mm and smaller than or equal to 0.3 mm; the heat insulation layer is positioned on the inner side of the ablation-resistant layer; the total thickness of the thermal protection structure is smaller than or equal to 5 mm, and the overall density of the thermal protection structure is smaller than or equal to 0.6 g / cm. According to the thin-wall gradient thermal protection structure, under the extreme lightweight constraint that the thickness is smaller than or equal to 5 mm and smaller than or equal to 0.6 g / cm < 3 >, the extra thermal insulation gain larger than or equal to 5% is obtained through the principle of gradient layering and millimeter-level near-wall ablation resistance.
Owner:HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL

A co-woven three-dimensional interpenetrating network reinforced aerogel composite material and a preparation method and application thereof

The application provides a kind of co-woven three-dimensional interpenetrating network reinforced aerogel composite material and its preparation method and application.The composite material is composed of reinforced phase and matrix phase, the reinforced phase is three-dimensional interpenetrating network fiber felt prepared by integrated weaving or needling process, containing hollow fiber and solid quartz fiber, which are interpenetrated and entangled in three-dimensional space to form a continuous network skeleton;The matrix phase is silica-based aerogel filled and coated network pores.The preparation method includes the steps of forming, sol impregnation, gelation and aging, supercritical drying and other steps of co-woven preform, and can also include hydrophobic post-processing.The material has the characteristics of light weight, high strength, ultra-low thermal conductivity and excellent wave-transparent performance, and is suitable for hypersonic aircraft radome, antenna window, radar fairing and satellite communication wave-transparent components, which can meet the requirements of load bearing, heat insulation and wave-transparent integration.
Owner:FEIDU AEROSPACE TECH CO LTD

Compression molding method for chopped quartz fiber reinforced PEEK resin-based wave-transparent radome

The invention discloses a compression molding method for a chopped quartz fiber reinforced PEEK resin-based wave-transparent radome. The method comprises the following steps: preparing and drying a premix; the premix is added into a mold cavity in batches in a pre-pressing mode; and carrying out compression molding on the premix. According to the PEEK resin temperature characteristic, integrated compression molding is carried out under the conditions of multi-stage heating and stage progressive pressurization, and the obtained composite material has the antenna housing appearance and also has good mechanical property and wave-transparent property; the forming mode is simple, and the production cost and period can be greatly reduced under the condition that the use requirements are met.
Owner:HUBEI SANJIANG HANGTIAN JIANGBEI MASCH ENG CO LTD

Preparation method of high-temperature-resistant wave-transparent special-shaped polyimide-based composite part

PendingCN122645629AImidePolymer science
The application discloses a preparation method of a high-temperature-resistant wave-transparent special-shaped polyimide-based composite part. The preparation method comprises the following steps: firstly, coating polyimide resin on the surface of a quartz fiber cloth to obtain a quartz fiber prepreg cloth, and cutting and numbering the quartz fiber prepreg cloth according to the structure of the special-shaped part; secondly, laying the quartz fiber prepreg cloth on a male die, and sequentially performing vacuum bag pressing and drying and heat preservation; then, repeating the processes of laying, vacuum bag pressing, drying and heat preservation; finally, performing die pressing and drying to obtain the high-temperature-resistant wave-transparent special-shaped polyimide-based composite part. The special-shaped polyimide-based composite part prepared by the method has the advantages of one-time forming, excellent physical and chemical properties, lower cost, and wider application in the future due to the unique preparation and processing technology.
Owner:BEIJING COMPOSITE MATERIALS CO LTD

Method for improving high-temperature interface strength of quartz fiber reinforced polyimide resin-based composite material

The invention provides a method for improving the high-temperature interface strength of a quartz fiber reinforced polyimide resin composite material. The method comprises the steps of fiber cleaning, fiber surface activation, fiber surface grafting treatment and composite material preparation. Taking a quartz fiber reinforced PMR type polyimide resin composite material as an example, the bending strength of the composite material prepared by the method is greater than or equal to 373.5 Mpa under the test condition of 350 DEG C / 20 min, and is improved by 46%; the interlayer shear strength is greater than or equal to 34.5 MPa and is improved by 43%, and the dielectric constant is less than or equal to 3.40. The method solves the problems of poor interface bonding strength, low mechanical strength and poor structural stability of the quartz fiber reinforced polyimide resin-based composite material under the long-time high-temperature working condition, and is simple, easy to operate and suitable for batch production and application.
Owner:AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH

High-temperature-resistant efficient filter

The invention relates to the technical field of air filtration, discloses a high-temperature-resistant efficient filter, and aims to solve the problems that an organic filter material of a traditional filter is poor in temperature resistance, ceramic fibers are high in brittleness and high in cost, and an existing filter element is insufficient in support, uneven in flow field and prone to failure at high temperature, so that the performance is reduced at the temperature of 400 DEG C or above. The filter comprises a stainless steel outer frame which is encircled and fixed by a plurality of plate bodies; the metal filter screen is arranged on the outer side of the air inlet side of the outer frame; the filter element is arranged in the outer frame and is formed by alternately stacking glass fiber filter paper and aluminum foil; the sealant is injected into the junction of the edge of the filter element and the outer frame. In addition, the aluminum foil wave crest can be provided with a filiform reinforcing structure and a quartz fiber functional layer. The H13-level filtering efficiency at the instant high temperature of 550 DEG C is achieved, the structural stability, the sealing reliability and the low airflow resistance are all considered, and the service life is prolonged.
Owner:SUZHOU COMFORT ENVIRONMENT TECH CO LTD

Cutting device for quartz fiber board processing

The utility model relates to the technical field of quartz fiberboard processing, in particular to a cutting device for quartz fiberboard processing, which comprises a shell, a cutting groove is processed in the middle of the shell, a bending plate is fixedly connected to the outer wall of the shell, a cutting mechanism is arranged below the bending plate, a cutting knife is arranged below the cutting mechanism, and the cutting knife is arranged below the cutting mechanism. And a bulge at the right end of the cutting knife is fixedly connected with an output shaft of a first motor. According to the cutting device for quartz fiberboard machining, through cooperation of the limiting mechanism and the shell, an output shaft of a second motor rotates to drive a rotating rod to rotate, a push plate is limited by the shell to do linear motion, limiting of the quartz fiberboard is achieved, and compared with a spring, a rack is used for driving the push plate to move the quartz fiberboard more stably; and the electric telescopic rod is stopped, the quartz fiberboard is limited through the pressing roller, and the situation that the cutting precision is affected due to edge warping of the quartz fiberboard during cutting is reduced.
Owner:ZHEJIANG DENIM NEW MATERIAL TECH CO LTD

Polytetrafluoroethylene-based quartz fiber low-dielectric composite material

When the human society enters the highly informationized era, instant uninterrupted communication between electronic devices is everywhere, which causes innovative application of the 5G / 6G communication technology in work and life, such as automobile automatic driving, virtual / augmented reality, digital logistics and the like. The development of the technologies also continuously improves the performance requirements of the low-dielectric composite material, such as high frequency, high speed and low loss, which are the key points of the current research. The invention provides preparation of a polytetrafluoroethylene-based quartz fiber low-dielectric composite material, quartz fibers and polytetrafluoroethylene resin are used as a reinforcement and a matrix, the resin content of a composite material substrate is regulated and controlled by adopting a multi-impregnation mode, and surface defects of the composite substrate are repaired through polydopamine deposition. The polytetrafluoroethylene-based quartz fiber low-dielectric composite material prepared by the invention is high in strength, has low dielectric constant and dielectric loss in a high-frequency environment, is simple in preparation process, and can meet wave-transparent performance requirements and packaging requirements of a new generation of communication technology and related equipment.
Owner:EAST CHINA UNIV OF SCI & TECH

Quartz fiber yarn tension adjusting device

The utility model discloses a quartz fiber yarn tension adjusting device belongs to fiber yarn tension adjusting technical field, solved the problem that the mechanical structure of quartz fiber yarn tension adjusting device in traditional technology will lead to the fiber fracture if tension control is improper, it includes: the yarn and the yarn function of collecting yarn when realizing in the tension adjustment through the first drive motor of base drive's both sides roller on the base, the second drive motor drives the rotation of screw rod, and the screw rod outer cover has the thread ring, because the thread ring is fixedly connected with the slide, so the thread ring can not rotate, but because the slide is connected with the guide rail, the thread ring will replace the force transmission of drive motor and convert into the force along the guide rail direction translation on the screw rod, thereby make the slide and the compression roller frame receive the force of second drive motor, and translate on the guide rail, realize the tension elimination of quartz fiber yarn, realize adjustable effect and realize the full automatic function of the yarn, the yarn and the yarn.
Owner:JIANDE XINDING FIBER MATERIALS CO LTD

Preparation method of light high-strength fiber reinforced ceramic matrix composite antenna window

The invention provides a preparation method of a light high-strength fiber reinforced ceramic matrix composite antenna window, and belongs to the technical field of antenna windows. Comprising the steps of quartz fiber preform preparation, pretreatment and densification composite forming. The densification forming comprises the steps of first-round compounding, second-round compounding and post-treatment; the first-round compounding step comprises the following steps: adding an acidic material into silica sol, and adjusting the pH value of the silica sol to 2-6 to obtain first-round composite silica sol; putting the pretreated quartz fiber preform into the first round of composite silica sol, performing cyclic dipping, performing saturated vapor pressure curing treatment at the pressure of 30-101 kPa, and then treating for 2-8 hours at the temperature of 500-800 DEG C in an air atmosphere to obtain an antenna window blank; the antenna window obtained by adopting the preparation method disclosed by the invention has the density as low as 1.1-1.6 g / cm < 3 >, high strength and excellent stability.
Owner:SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS

Ultrafast flash sintering method and system for performing the same

Ultrafast Joule heating synthesis methods and systems, and more particularly, ultrafast flash Joule heating upcycling of fiber reinforced plastics (such as waste fiber reinforced plastics, glass fiber reinforced plastics, carbon fiber reinforced plastics, and / or quartz fiber reinforced plastics) and materials including fiber reinforced plastics (such as reinforced metal laminates including glass reinforced aluminum laminates and other glass reinforced metal laminates) to phase-controllable silicon carbide (SiC). Further, ultrafast Joule heating synthesis methods and systems for synthesis include SiC fibers / fibrils (such as SiC nanowires), SiC nanowires, and SiC-containing polymer composites, as well as B4C nanowires.
Owner:WILLIAM MARCH RICE UNIVERSITY

A method of molding in place a quartz / phenolic tip with an embedded probe temperature sensor

The application discloses a quartz / phenolic end head moulding method of an embedded probe temperature sensor, and steps are as follows: forming and processing of a probe temperature sensor protection support; packaging of the probe temperature sensor; forming of an end head product; and processing of the end head product. The application makes full use of the flexibility of the moulding process, the designability of the material, and the excellent ablation resistance of the quartz fiber and the phenolic resin, avoids the problem that cannot be operated due to the characteristics of the forming process, and reduces the preparation difficulty of the product. The quartz / phenolic composite material is used to replace the traditional conical metal piece, which greatly reduces the total mass of the end head. The product has high size precision, good internal quality, and low manufacturing cost after forming. In the case of meeting the normal use of the embedded probe type temperature sensor, the overall aerodynamic structure of the end head is not damaged. After the power and heat test, the material selection and design of the end head are obviously improved.
Owner:BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP CO LTD

Thermal-mechanical-chemical-electromagnetic coupling-based integrated calculation method for ablation damage and electromagnetic wave transmission performance of quartz fiber reinforced composite material under laser irradiation

The invention relates to the technical field of composite material damage evaluation and performance prediction, and discloses a thermal-mechanical-chemical-electromagnetic coupling-based integrated calculation method for ablation damage and electromagnetic wave transmission performance of a quartz fiber reinforced composite material under laser irradiation. The method comprises the following steps: acquiring verification data through a laser ablation experiment and an electromagnetic wave transmission test, establishing a laser damage numerical model of the quartz fiber reinforced composite material, and correcting a simulation calculation result by using the verification data; secondly, extracting features in a simulation calculation result, performing electromagnetic wave-transparent numerical calculation based on an established electromagnetic wave-transparent performance numerical model, and verifying and correcting through experimental data again; and finally, a verified integrated calculation method is formed. According to the method, organic coupling and integrated prediction from physical and chemical damage to electromagnetic performance degradation are realized, the problems of model separation, excessive geometric simplification, dependence on high-cost experiments and the like in the prior art are solved, and the prediction precision, efficiency and engineering applicability are remarkably improved.
Owner:HEBEI UNIV OF TECH

A method for producing a quartz fiber-reinforced quartz composite material containing a lanthanum phosphate interface phase

ActiveCN117964390BRadiating element housingsLanthanum phosphateQuartz fiber
The application discloses a preparation method of quartz fiber reinforced quartz composite material containing a lanthanum phosphate interface phase, and the method comprises the following steps: vacuum impregnating a quartz fiber fabric from which an impregnant is removed in a lanthanum phosphate precursor solution, and obtaining the quartz fiber fabric containing the lanthanum phosphate interface phase after high-temperature sintering; vacuum impregnating the quartz fiber fabric in a silica sol, and repeating impregnation-drying until densification after drying; and high-temperature sintering the quartz fiber reinforced quartz composite material blank, and continuing to repeat the impregnation-drying-sintering process for multiple cycles after sintering, so as to finally obtain the dense and uniform quartz fiber reinforced quartz composite material containing the lanthanum phosphate interface phase. Since the lanthanum phosphate interface phase exists, the quartz fiber reinforced quartz composite material prepared has good denseness, improved material toughness and enhanced mechanical properties.
Owner:NAT UNIV OF DEFENSE TECH

Rudder heat-proof cup suitable for aerobic long time and preparation method of rudder heat-proof cup

The invention relates to the technical field of high-temperature fire-resistant composite materials, and provides a rudder heat-proof cup suitable for aerobic long time and a preparation method of the rudder heat-proof cup. The rudder heat-proof cup sequentially comprises an anti-oxidation and ablation-resistant layer prepared from polycarbosilane modified 2.5 D quartz fabric / medium-density phenolic aldehyde, a barrier layer prepared from a metal material and a heat insulation layer prepared from quartz fiber cloth reinforced low-density phenolic aldehyde from the outer layer to the inner layer, the manufacturing method mainly comprises the following steps: putting the heat insulation layer fiber cloth, the metal barrier layer and the anti-oxidation ablation-resistant layer into a forming mold by using 2.5 D quartz fabric; a double-cavity structure is achieved through mold design, and medium-density phenolic aldehyde and low-density phenolic aldehyde are adopted for impregnation and curing at the same time; brushing a polycarbosilane modified anti-oxidation ablation-resistant layer; and finally processing to obtain the rudder heat-proof cup. Compared with a traditional material, the ablation retreating amount of the anti-oxidation ablation layer material of the rudder heat-proof cup is reduced by 90% or above, the internal temperature is greatly reduced through metal phase change and low-density heat insulation, and the anti-oxidation ablation layer material is suitable for thermal protection of an aerobic long-time rudder shaft.
Owner:HENAN JIUCE TECH CO LTD

A quartz fiber melting passive counter-roller quartz rod positioning mechanism

The utility model relates to a quartz fiber melting passive counter roller quartz rod positioning mechanism. Its roll sending counter roller includes first, second drive rollers that drive and rotate oppositely by the drive arrangement, and the first, second drive rollers rotate and are assembled on the frame to be used for sending quartz rods along the first direction, and the first, second drive rollers are arranged in parallel in the first plane, and the first direction is perpendicular to the first plane, the positioning counter roller rotates and is assembled on the frame and includes first, second positioning rollers, and the first, second positioning rollers are arranged in parallel in the second plane, and the first, second planes are parallel, and the positioning counter roller and roll sending counter roller are sequentially arranged along the first direction to make the quartz rods pass through the positioning counter roller and roll sending counter roller in turn, and the outer surface of at least one of the first, second positioning rollers is provided with annular positioning grooves corresponding to the quartz rods. It can ensure that the quartz rod is inserted and assembled quickly, and can improve the positioning accuracy of the quartz rod as far as possible.
Owner:JIANGSU JINGYUE NEW MATERIAL TECHNOLOGY CO LTD

Sizing agent for quartz fiber as well as preparation method and application of sizing agent

The invention provides a sizing agent for quartz fibers as well as a preparation method and application thereof, and relates to the technical field of preparation and application of compositions of high-molecular compounds. According to the preparation method, the sizing agent for the quartz fiber can be stably prepared through a preparation process of aromatic dianhydride pretreatment, specific polycondensation treatment and mixing treatment of polyamide acid salt, tertiary amine and a functional additive according to a specific ratio; the whole preparation process is a full-water-based system, the used functional additive can be completely volatilized at high temperature, no residue exists, and the characteristics of environment friendliness and high performance are achieved. The obtained sizing agent for the quartz fiber has extremely high molecular weight and temperature resistance potential, and the glass transition temperature of the sizing agent is 300 DEG C or above. When the quartz fiber sizing agent is applied to quartz fiber sizing treatment, a high-performance protective layer capable of resisting the high temperature of 350 DEG C or above can be formed on the surface of the quartz fiber, the long-term working temperature and the processing stability range of the quartz fiber reinforced polymer matrix composite material are widened, and the application prospect is wide.
Owner:NAT UNIV OF DEFENSE TECH

Preparation method of T-direction gradient honeycomb core material

The invention relates to a preparation method of a T-direction gradient honeycomb core material. The preparation method comprises the following steps: preparing a non-uniform fiber fabric, gluing, staggering and stacking, preparing a laminated plate, stretching a honeycomb, dipping and purifying. Fabrics such as variable-density glass fibers or quartz fibers, core strip glue such as polyimide or epoxy resin series and impregnating resin such as polyimide or phenolic cyanate are adopted, preparation of the T-direction gradual change honeycomb based on the weaving and assembling method is achieved, and engineering application requirements of low cost, high efficiency, continuous production and the like are met; and on-demand customization of the performance of the honeycomb core material is achieved, non-uniform loads can be perfectly matched, and the honeycomb core material has wide application prospects in the field of light weight of high-end equipment such as aerospace and the like.
Owner:THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC

Alkaline electrolytic cell plastic electrode frame and preparation method and application thereof

The invention relates to an alkaline electrolytic cell plastic electrode frame and a preparation method and application thereof, and belongs to the technical field of alkaline electrolytic cell electrode frame materials. The alkaline electrolytic cell plastic electrode frame provided by the invention comprises the following components in parts by weight: 100 parts of polysulfone; 20 to 30 parts of PFA resin; 5 to 15 parts of bisphenol A polycarbonate; 2-6 parts of graphene oxide; 5 to 10 parts of a fluorosilane coupling agent; 5 to 20 parts of quartz chopped fiber; 2-8 parts of hollow glass beads; and 2-6 parts of spherical silica powder. According to the scheme, the plastic electrode frame takes the polysulfone material as a main material, is matched with the PFA resin and the bisphenol A polycarbonate, and adopts the quartz chopped fibers with specific morphology and size to be matched with the hollow glass beads and the spherical silica powder reinforcing material, so that the plastic electrode frame has relatively good strength, high temperature resistance and strong alkali corrosion resistance; and the mechanical strength performance under the high-temperature condition can be greatly improved, and good market competitiveness is achieved.
Owner:JINYUAN (SHANDONG) NEW ENERGY TECH DEV CO LTD

Quartz fiber paper and preparation method thereof

Quartz fiber paper is composed of quartz fiber chopped strands and a binder, white water is prepared by adding a water-based dispersing agent, a cellulose thickening agent and an organic silicon defoaming agent, so that the quartz fiber chopped strands are uniformly dispersed, the quartz fiber paper is smooth in appearance and stable in performance, and performance reduction caused by non-uniform fiber dispersion is avoided; fibers of the quartz fiber paper are uniformly dispersed. Due to the loose structure of the quartz fiber base paper, the quartz fiber base paper has excellent resin impregnation capacity, and after sizing, the interior of the quartz fiber paper is tightly combined and is not prone to layering. Meanwhile, the high-performance resin provides excellent tensile strength for the base material, and the tensile strength of the sized quartz fiber felt reaches 5.44 N / mm.
Owner:SHAANXI HUATEK GLASS FIBRE CO LTD