328 results about "Alkali free" patented technology

The invention discloses early-strength, low-resilience and high-durability sprayed concrete and a preparation method thereof. The sprayed concrete is prepared from the following components: cement, an early-strength hardening auxiliary cementing material, coarse aggregate, fine aggregate, water, an additive, a fluoride-free alkali-free high-concentration accelerator, a rheology modifier, fibers and the like. The preparation method of the sprayed concrete mainly comprises two aspects. The method comprises the following steps: (1) proportioning optimization; and (2) functional materials are applied. By optimizing the glue material amount, the water-glue ratio and the sand ratio and adopting the small-particle-size coarse aggregate, the concrete has good workability and homogeneity, the risk of pipe blocking in the pumping and spraying process is reduced, aggregate rebound in the jet flow process is reduced, and the spraying operation effect is optimized. By applying the high-concentration fluoride-free alkali-free accelerator and the early-strength hardening auxiliary cementing material, the early strength of the concrete can be effectively improved, the volume deformation is reduced, and the long-term mechanical property and durability are improved. The fiber and the rheological modifier are added, so that the rheological property of the sprayed concrete can be further effectively improved, and the rebound rate is reduced. Rapid setting of the sprayed concrete and cooperative improvement of mechanical properties and long-term performance are achieved by optimizing the mixing ratio and applying novel functional materials.

The invention discloses a composite clarifying agent for alkali-free glass and a manufacturing method of an alkali-free glass substrate, and relates to the technical field of glass manufacturing, the composite clarifying agent for alkali-free glass comprises the following components by mass: 12-30% of ammonium chloride, 48-73% of sulfate, and 11-25% of calcium fluoride; the preparation method comprises the following steps: adding a composite clarifying agent accounting for 0.2-1.2% of the total weight of the glass raw material into the glass raw material, uniformly mixing to form a batch, and carrying out melting, molding, spraying, annealing, cutting, alkali cleaning and other processes on the batch to finally prepare the glass substrate. The prepared composite clarifying agent does not contain toxic substances such as arsenic oxide and antimony oxide, the glass substrate produced by using the clarifying agent not only has an excellent clarifying effect, but also can recycle SO2 and NH3 gas generated in the melting process, can effectively solve the quality problems such as micro-flaws on the surface of the glass substrate in the production process, and has a good application prospect. And the production cost can be reduced and the product quality can be improved.

The invention provides an early-strength quick-hardening alkali-free powdery quick-setting material and a preparation method thereof. The raw materials specifically comprise a flash coagulation component, a coagulation adjusting component, a drying and stabilizing component, a reinforcing component, a grinding aiding component and a thickening component. The percentage of each component is as follows: 45wt%-55wt% of the flash setting component, 3wt%-10wt% of the setting adjusting component, 5wt%-15wt% of the drying stabilizing component, 25wt%-35wt% of the reinforcing component, 1wt%-5wt% of the grinding aid component and 2wt%-8wt% of the thickening component. The early-strength quick-hardening alkali-free powdery quick-setting material disclosed by the invention can simultaneously meet the following requirements: (1) the initial setting time of neat paste is less than 2min, and the final setting time is less than 3min; (2) the 1d strength of the mortar is greater than 13MPa, the 28d compressive strength ratio is greater than 105%, and the 90d strength retention rate is greater than 110%; (3) the alkali content (in terms of Na2O equivalent) is lower than 0.5%; (4) the compatibility with cement of different manufacturers is good, the use dosage is low, and good popularization and application values are achieved.

The invention discloses an alkali-free accelerator and a preparation method and application thereof in the technical field of concrete additives, and the alkali-free accelerator provided by the invention comprises the following components in percentage by mass: 40%-50% of aluminum sulfate, 10%-15% of magnesium sulfate, 0.2%-0.6% of diethanol amine, 0.5%-1% of catechol-4-ammonium sulfonate, 5%-10% of a stabilizer and the balance of water. The stabilizer comprises silicate dispersion liquid and silica sol. The alkali-free accelerator provided by the invention can be used for spraying concrete, the mixing amount of the alkali-free accelerator is generally 4-6% of the mass of cement, the alkali-free accelerator is good in rapid setting effect and has excellent early and later compressive strength, and meanwhile, the alkali-free accelerator has relatively excellent stability.

The invention relates to a high-gloss high-glass-fiber-content nylon 66 composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material is prepared from the following components in percentage by weight: 50 to 60 percent of alkali-free glass fiber, 2.2 to 3.5 percent of highlight compatibilizer, 3.5 to 5 percent of flexibilizer, 0.15 to 0.2 percent of antioxidant, 0.6 to 0.9 percent of processing aid and the balance of nylon 66 resin, the high-gloss compatibilizer is prepared by the following steps: substituting n-alkyl alcohol and vinyl trichlorosilane to prepare an intermediate 1, initiating addition by methyl mercaptoacetate and unsaturated double bonds of the intermediate 1 to prepare an intermediate 2, and finally performing amine ester exchange on gamma-aminopropyltriethoxysilane and terminal methyl ester of the intermediate 2. The highlight compatibilizer effectively reduces the content of a high crystal region-low crystal region interface in a composite system and reduces scattering of light, so that the composite material keeps higher glossiness.

The invention relates to the technical field of thermal insulation materials, in particular to an aerogel felt and a preparation method thereof.The aerogel felt is composed of a composite fiber base material and multi-component aerogel loaded in the composite fiber base material, the composite fiber base material comprises 65%-75% of alkali-free glass fibers, 15%-20% of modified polyimide fibers, 4%-6% of nanoscale carbon fibers and 8%-12% of basalt fibers, and the multi-component aerogel is loaded in the composite fiber base material. According to the multi-component aerogel, 78%-82% of tetraethoxysilane, 12%-14% of methyltrimethoxysilane, 4%-6% of dimethyldimethoxysilane and 2%-4% of vinyltrimethoxysilane serve as precursors, 1.5%-2.5% of aluminum oxide, 0.8%-1.5% of titanium oxide nanoparticles and 3%-4% of zinc borate are added, a multi-stage reinforced structure is formed, the mechanical property and flexibility of the aerogel felt are remarkably improved, the tensile strength reaches 400 kPa or above, and the tensile strength reaches 400 kPa or above. The flexibility is excellent.

The invention discloses a modified epoxy / glass fiber composite material as well as a preparation method and application thereof, and particularly relates to a preparation method of a composite insulating material for high-voltage power equipment, in particular to encapsulation insulation of a dry-type air-core reactor. The invention aims to meet the requirements of key high-voltage power equipment such as the dry-type air-core reactor on the mechanical and insulating properties in the long-term service process of the key high-voltage power equipment. The epoxy resin is mainly used as a matrix, the alkali-free glass fiber cloth is used as a reinforcement, and the epoxy-terminated liquid nitrile rubber and Al2O3 are used as fillers to prepare the composite material, and the composite material has better thermal stability and mechanical properties. The produced encapsulating material for the dry-type air-core reactor is obviously improved in mechanical bending and electrical insulation properties, and the thermal-vibration aging life of the encapsulating material is obviously prolonged. The method is applied to the technical field of high-voltage insulating materials.

The invention discloses a super-early-strength shrinkage-free high-crack-resistance tunnel spraying repair material in the technical field of civil engineering materials, which comprises the following raw materials in percentage by mass: 35-45% of sulphoaluminate cement; 8%-12% of a superfine early strength admixture; 2%-3% of a calcium sulphoaluminate expanding agent; 1%-2% of a magnesium oxide-based expanding agent; 1-2% of a calcium-magnesium composite expanding agent; 10%-15% of hollow glass beads; 1.5%-2.5% of copper plated steel fiber; 0.1%-0.3% of polypropylene fiber; 25%-30% of graded quartz sand; 0.5%-1.0% of a polycarboxylic acid water reducing agent; 3%-5% of an alkali-free liquid accelerator; 0.3%-0.8% of a thixotropic agent; and 0.1%-0.3% of a thickening time control agent. According to the method, a multi-scale performance cooperative regulation system is innovatively constructed. Through accurate control of the hydration process of a gel system, a shrinkage stress multi-stage compensation mechanism and systematic integration of a fiber-matrix interface strengthening technology, the mutual restriction relationship among early strength development, volume stability and crack resistance of a traditional material is broken through.

The invention relates to the technical field of glass, in particular to an alkali-free aluminoborosilicate glass composite clarifying agent and a clarifying method thereof. The alkali-free aluminoborosilicate glass composite clarifying agent is prepared from the following raw materials in percentage by mass on the basis of the total mass of alkali-free aluminoborosilicate glass: 0.4 to 5.5 percent of halogen alkaline earth metal salt, 0.03 to 0.4 percent of lanthanum oxide, 0.01 to 0.4 percent of tin dioxide and 0.01 to 0.3 percent of cerium dioxide. The alkali-free aluminoborosilicate glass composite clarifying agent is applied to alkali-free aluminoborosilicate glass, and the problems that the alkali-free aluminoborosilicate glass is poor in clarifying effect and has many bubble defects are solved; the corrosion of high-temperature molten glass to refractory materials at parts such as a tank furnace and the like is reduced, so that the number of stone defects of the refractory materials in the glass is reduced, and the service life of the refractory materials of the furnace is prolonged.

The invention discloses alkali-free amber glass easy to blow-mold and molding equipment, and relates to the technical field of alkali-free amber glass. The alkali-free amber glass is prepared from the following raw materials in percentage by mass: 55 percent to 60 percent of SiO2, 0.1 percent to 5 percent of Al2O3, 0.1 percent to 5 percent of B2O3, 5 percent to 20 percent of CaO, 5 percent to 20 percent of BaO, 5 percent to 20 percent of ZnO, 0.1 percent to 1.5 percent of Fe2O3, 0.5 percent to 3.5 percent of Ti O2, 0.1 percent to 3 percent of C and 0.1 percent to 3 percent of X2O3, wherein the total mass percent of SiO2 and Al2O3 is 58%-65%, the total mass percent of CaO, BaO and ZnO is 26%-32.5%, the ratio of (CaO + BaO) / ZnO is 2.5-6, and the ratio of X2O3 to Ti O2 is 0.1-7.5, the alkali-free amber glass obtained according to the proportion is easy to blow and form, has the characteristic of high chemical stability, is suitable for storage glassware in the fields of high-end medicines, chemical reagents and the like, and can be used for preparing the amber glass. And meanwhile, in the forming equipment, the multiple sets of forming molds can be assembled only through one driving air cylinder, and compared with a traditional mode that multiple sets of forming molds need multiple drives, the production cost is greatly reduced.

The invention relates to the technical field of fire-resistant cables, and particularly discloses a high-flame-retardant and high-fire-resistant cable which is composed of a conductor, an insulating layer formed by magnesium oxide particles and an outer sheath, a spiral cavity is formed between the conductor and the outer sheath, the spiral cavity is formed by at least one spirally-wound insulating tape, and the insulating tape is arranged between the conductor and the outer sheath. The spiral cavity is filled with magnesium oxide particles and is compacted, the insulating tape is a high-temperature-resistant flexible mica tape, the mica tape is formed by compounding synthetic mica paper or phlogopite paper and alkali-free glass fiber cloth, and the spiral cavity formed by the spirally wound composite mica tape limits the displacement of the magnesium oxide particles. The inclined winding of the insulating tape constructs a support system with a stable structure and uniform pressure distribution, greatly improves the deformation resistance of the insulating layer under dynamic mechanical stress, effectively guarantees the integrity of an insulating medium, and effectively solves the technical problem that a magnesium oxide layer in a traditional mineral insulated cable is easy to loosen.

The utility model discloses a light dry-type air-core reactor, which comprises an upper star-shaped frame, a reactor coil, a lower star-shaped frame, a grading ring and a post insulator, an upper star-shaped frame is arranged at the upper end of the reactor coil, a lower star-shaped frame is arranged at the lower end of the reactor coil, grading rings are arranged on the upper star-shaped frame and the lower star-shaped frame, a flange is arranged at the bottom of the lower star-shaped frame, and a supporting insulator is arranged at the bottom of the reactor coil. According to the light reactor, the novel insulation combination film is adopted to wrap the rectangular transposition aluminum stranded wires to form the reactor package, the mode that a protection insulation layer wrapped by alkali-free glass fibers is impregnated with epoxy resin of a traditional reactor is omitted in the middle package, and the light reactor has the advantages of being small in size, light in weight and good in heat dissipation performance.

The invention discloses a hydrolysis-resistant reinforced high-temperature nylon composite material and a preparation method thereof, and relates to the technical field of nylon composite materials. According to the composite material, a PA66-PA46 random copolymer, bio-based polyamide 1010 and PA6 resin are used as matrixes, and are matched with a composite reinforcement formed by silane coupling agent modified carbon nanotubes and hydrolysis-resistant alkali-free glass fibers; and a polycarbodiimide and epoxy-terminated polyether compounded hydrolysis-resistant agent, a bio-based composite nucleating agent, an antioxidant complexing agent, a fatty acid amide flowable agent and an inorganic coloring agent are used as auxiliary materials. The preparation method comprises the following steps: raw material synergistic pretreatment, ultrasonic-mechanical shearing synergistic premixing, dynamic pressure-regulating twin-screw extrusion blending, water mist-water cooling-air knife synergistic cooling pelletizing and vacuum pulse drying-crystallization synergistic post-treatment. The composite material is uniform in structure and stable in performance, has excellent hydrolysis resistance and high-temperature resistance, and is suitable for application scenes with relatively high requirements on material environment stability.

The invention provides a low-dielectric high-toughness alkali-free spherical glass powder modified copper-clad plate. The low-dielectric high-toughness alkali-free spherical glass powder modified copper-clad plate consists of a composite resin matrix, modified alkali-free spherical glass powder, a synergistic functional filler, an auxiliary agent, a reinforced base material and a conductive layer, the modified alkali-free spherical glass powder is subjected to gradient treatment of plasma activation, silane grafting and organic silicon coating, the particle size of the modified alkali-free spherical glass powder is 0.5-2 microns, the modified alkali-free spherical glass powder accounts for 10-20 parts by weight in the raw materials, and the content of organic functional groups on the surface of the modified alkali-free spherical glass powder is larger than or equal to 1.6 mmol / g.The invention further provides a preparation method of the low-dielectric high-toughness alkali-free spherical glass powder modified copper-clad plate. Compared with the prior art, the preparation method has the following beneficial effects that a double-resin blending and elastomer toughening system is constructed through a modification process of filler activation, silane grafting and organic silicon coating, and the technical bottleneck is solved in combination with an interface compatibility technology.

The invention relates to the technical field of building material preparation, and discloses an aluminate material compounded alkali-free accelerator which comprises the following components in parts by mass: 6-12 parts of an aluminate-based material, 4-10 parts of a sulphoaluminate-based material, 8-18 parts of a regulator, 20-40 parts of aluminum sulfate and 50-70 parts of water, the preparation method comprises the following steps: sequentially adding the sulphoaluminate-based material, the aluminate-based material, the regulator and the aluminum sulfate, and carrying out multi-stage stirring. When the mixing amount of the prepared accelerator is 6%-8% of the mass of cement, the initial setting time is 120-180 seconds, the final setting time is 200-300 seconds, the strength in 6 hours is larger than or equal to 1.1 MPa, and the strength in 1 day is larger than or equal to 9 MPa. According to the formula, the setting performance and strength development of the accelerator are optimized, the adaptability and construction efficiency of cement are improved, the problems that a traditional accelerator is poor in adaptability, long in setting time and slow in strength development are solved, and the requirements for rapid construction and high strength are met.

The invention discloses titanium-rare earth synergistic alkali-free glass with an ultrahigh strain point and high resistance and a preparation method of the alkali-free glass, and belongs to the technical field of glass. According to the alkali-free glass, a unique titanium-rare earth synergistic enhanced network is constructed, two key control parameters, namely, a high temperature performance index (HTPI) and a resistance synergistic factor (RCF), are defined for the first time, and when the HTPI is controlled to be 5.8-7.2 and the RCF is controlled to be 3.5-4.85, the strain point of the glass is larger than or equal to 745 DEG C, and meanwhile, the glass has the advantages that the glass has the good heat resistance and heat resistance; according to the glass substrate prepared by the preparation method disclosed by the invention, the resistivity at 1620 DEG C can be accurately regulated and controlled within an ideal interval of 50-150 omega.m, meanwhile, the Young modulus is greater than or equal to 88 GPa, the liquidus temperature is less than or equal to 1260 DEG C, the comprehensive performance is far better than that of the prior art, and the strict requirements of high-generation LTPS and IGZO display panel manufacturing on the glass substrate are perfectly met.

The invention belongs to the technical field of railway bridge ancillary facilities, and discloses a high-strength light composite material railway bridge foot plank which comprises a plane part at the top and hollow strip-shaped protrusions arranged in the length direction, and strip-shaped grooves opened downwards are formed between the protrusions so as to improve the bearing capacity and reduce the dead weight. The foot plank is formed by combining a resin matrix, an alkali-free glass fiber reinforced material, a flame retardant and an auxiliary agent, an unsaturated polyester resin system or an epoxy resin system is selected, and the connecting piece is of an S-shaped component or a hook type structure, so that rapid installation and reliable locking of the foot plank and the steel beam are achieved. The foot plank has the advantages of high strength, light weight, corrosion resistance, high weather resistance and the like, and is suitable for long-term safe use of railroad bridges.

Glasses are disclosed which can be used to produce substrates for flat panel display devices. The glasses may be substantially alkali free. The glasses are doped with one or more transition metals (e.g., Ni, Co) and exhibit reduced optical transmittance to suppress light leakage from the display device and / or to improve contrast. The display device may be a bottom emission display device or a top emission display device. The display device may be a tiled display device. Glasses disclosed herein may be used, for example, as a baseplate having a plurality of display substrates disposed thereon, a display substrate (e.g., backplane) having a plurality of light emitters disposed thereon, a glass cover plate, or combinations thereof.

The invention relates to the technical field of electronic glass, in particular to heat-resistant stable alkali-free boroaluminosilicate glass with high crystallization margin and a preparation method of the alkali-free boroaluminosilicate glass. The alkali-free boroaluminosilicate glass with heat resistance, stability and high crystallization margin is prepared from the following raw materials in percentage by mole: 68.54 to 72.82 percent of SiO2, 11.84 to 13.5 percent of Al2O3, less than or equal to 2.23 percent of B2O3, 4.72 to 6.6 percent of MgO, 4.65 to 5.8 percent of CaO, 0.8 to 1.5 percent of SrO, 3.2 to 3.79 percent of BaO and 0.1 percent of SnO2, the ratio of SiO2 to Al2O3 is 81.63 to 84.66 percent, and the ratio of (MgO + CaO + SrO + BaO) to Al2O3 is 1.15 to 1.30. The alkali-free boroaluminosilicate glass obtained in the invention has a high strain point and crystallization margin, and also has high heat-resistant stability and devitrification resistance.

The invention relates to a quick repair method for an assembled composite material. The quick repair method comprises the following steps: S1, manufacturing a composite material laminated plate; s2, cutting the composite material laminated plate; s3, holes are formed in the hexagonal composite material patch units; s4, obtaining a large number of hexagonal composite material patch units; s5, adhering the alkali-free glass fiber cloth; s6, holes are formed in the aluminum alloy plate; s7, the aluminum alloy plate is cut; s8, a large number of aluminum alloy connecting units are obtained; s9, repairing and patch assembling; s10, adjusting the appearance of the curved surface of the assembly structure; s11, the assembly structure is installed; through prefabrication and splicing of a large number of hexagonal composite material patch units and aluminum alloy connecting units, the repairing and manufacturing time of large composite materials is shortened, and the repairing speed is increased; by changing the using number of the hexagonal composite material patch units and the aluminum alloy connecting units, rapid repair of different damage areas can be effectively achieved; by changing the bending shape of the aluminum alloy connecting unit, the damage of the composite materials with different curvatures can be effectively and rapidly repaired.

The invention discloses a nano noble metal-based oxidation catalyst as well as preparation and application thereof, and belongs to the technical fields of preparation of nano catalysts and catalytic conversion of biomass derivatives. The nano noble metal-based oxidation catalyst comprises a core-shell structure as a carrier and nano noble metal particles (such as Pt) loaded on the core-shell structure; wherein the core-shell structure takes a cerium-based oxide as a core and takes a metal oxide as a shell; pt is loaded on the surface of the cerium-based oxide. When the catalyst is used for catalyzing glycerol oxidation to prepare glyceric acid, high glycerol conversion rate (as high as 90%) and high glyceric acid selectivity (as high as 99%) under an alkali-free condition can be realized.

The invention discloses a flame-retardant SMC (Sheet Molding Compound) material for a new energy storage box and a preparation method of the flame-retardant SMC material, and relates to the field of composite material preparation. The flame-retardant SMC material for the new energy storage box is prepared from the following components in parts by weight: 20-24 parts of epoxy vinyl ester resin, 14-20 parts of unsaturated polyester resin, 5-10 parts of benzoxazine resin, 12-18 parts of a phosphorus-nitrogen synergist, 5-8 parts of an inorganic flame retardant, 5-8 parts of a reinforcing agent and 1-3 parts of other auxiliaries. The phosphorus-nitrogen synergist comprises vinyl modified DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and amino modified DOPO, the inorganic flame retardant is prepared from expanded graphite and aluminum hydroxide, and the reinforcing agent is prepared from alkali-free glass fibers and nano magnesium hydroxide. The SMC material prepared by the invention is suitable for being safely used in various environments, and has high flame retardance and excellent mechanical properties.

The invention discloses a low-boron high-performance alkali-free glass fiber composition, and relates to the technical field of glass fibers. The technical scheme is as follows: the high-temperature-resistant glass comprises the following components in percentage by mass: 52%-60% of SiO2, 11%-15% of Al2O3, 2%-6% of B2O3, 18%-25% of CaO, 1%-3% of MgO, 0.1%-0.6% of Fe2O3, 0.1%-2.5% of TiO2, 0.3%-0.6% of F2, 0.05%-0.75% of K2O, 0.05%-0.75% of Na2O and 0.1%-3% of XO, wherein XO is selected from one or more of FeO, SeO2, BeO, La2O3 and CeO2. While the boron content is reduced, the stability of the glass composition under founding and forming conditions and the performance of a product are not deteriorated by adjusting the components of the glass, and the glass composition has the characteristics of better light transmission and lower dielectric constant.

The utility model relates to a liquid alkali-free accelerator storage tank with a stirring function. Comprising a storage tank structure, a lifting outer pipe is arranged in an inner cavity of the storage tank structure, and a lifting discharge port communicated with the inner cavity of the lifting outer pipe is connected to the peripheral wall of the lifting outer pipe; a spiral core shaft is arranged in an inner cavity of the lifting outer pipe in a penetrating mode, and a lifting spiral blade matched with the lifting outer pipe is fixedly connected to the spiral core shaft in a winding mode. The lower end part of the spiral core shaft is fixedly connected with a stirring paddle; the stirring rotating shafts are arranged in the inner cavity of the storage tank structure and are arranged on the two sides of the lifting outer pipe respectively; a plurality of groups of stirring paddles distributed in the axial direction of the stirring rotating shafts are mounted on the stirring rotating shafts; the driving device is used for driving the spiral core shaft and the stirring rotating shaft to synchronously rotate and synchronously lift and move. The quick-setting agent stirring device can perform all-directional efficient stirring operation on the quick-setting agent so as to solve the problem that the interior of the quick-setting agent is condensed to generate crystals, and the working efficiency is high.

A shotcrete interface reinforcement mortar for use in cold-region tunnel water seepage conditions, and its preparation method and application, belong to the field of shotcrete technology. Its raw materials are as follows: cement, water, calcium salt, phase-change temperature control component, modified silane coupling agent, fine aggregate, liquid alkali-free quick-setting agent and water reducer, wherein the phase-change temperature control component is a mixture of emulsion polymer powder and adhesive, and the modified silane coupling agent is a nanomaterial-modified silane coupling agent. The present invention is specifically aimed at how to effectively improve the bonding strength and water penetration resistance of shotcrete in low-temperature environments when cold-region tunnels are facing low-temperature water seepage construction environments. This new idea not only focuses on solving key problems such as the decrease in concrete bonding strength and susceptibility to freeze-thaw damage, which are common in tunnel construction in cold regions, but also aims to fundamentally improve the bonding condition between concrete and construction surface through refined surface treatment technology, and enhance its ability to resist structural damage caused by low temperature and water penetration.

The invention discloses a good-appearance, low-warpage and ablation-resistant polyphenyl ether polyamide composition and a preparation method thereof. The composition is prepared from the following raw materials in parts by weight: 10-35% of polyphenyl ether resin; 20-50% of polyamide resin; 30-32% of alkali-free glass fiber; 7-20% of a halogen-free flame retardant; 4-15% of a compatilizer; and 0.2-1% of an antioxidant. The polyphenyl ether polyamide composition prepared by the invention has the characteristics of good appearance, ablation resistance, low warping and excellent mechanical properties, improves the market competitiveness of the material, and can be applied to new energy automobile battery components and the like.

The present invention provides an alkali-free glass sheet, which has a content of Li2O+Na2O+K2O of from 0 mol % to 0.5 mol % in a glass composition, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less.

An alkali-free glass sheet according to the present invention contains, as a glass composition, in mol %, from 60% to 80% of SiO2, from 12% to 15% of Al2O3, from 1.2% to 4% of B2O3, from 0% to 0.5% of Li2O+Na2O+K2O, from 2% to 8% of MgO, from 2% to 11% of CaO, from 0% to 5% of SrO, from 0% to 5% of BaO, and from 10% to 16% of MgO+CaO+SrO+BaO, in which a mol % ratio B2O3 / Al2O3 is from 0.1 to 0.3, a mol % ratio (B2O3+BaO) / SiO2 is from 0.01 to 0.1, and MgO+CaO+SrO+BaO—Al2O3 is from −2% to +2%.

The invention belongs to the technical field of civil engineering materials, and particularly relates to sprayed concrete suitable for a chlorine salt erosion environment and a preparation method of the sprayed concrete. And meanwhile, the bionic helical carbon nanotube-polymer composite gel is pre-dispersed in water. Sequentially adding the aggregate, the fiber and the composite cementing material, carrying out dry mixing, adding the gel dispersion liquid, the water reducing agent and the air entraining agent, and stirring to obtain a mixture; and finally, adding an alkali-free liquid accelerator at a nozzle through a wet spraying process, and spraying the alkali-free liquid accelerator to a construction surface. The nano hybrid material can effectively adsorb and lock chloride ions, and the bionic gel has a crack self-repairing function. And the two components have a synergistic effect, and are combined with a compact microstructure and a fiber reinforcing and toughening effect, so that the obtained concrete has extremely high chloride ion penetration resistance and durability, and is particularly suitable for support and protection engineering in chlorine salt environments such as temporary expressways and the like.