331 results about "Antimony trioxide" patented technology

The invention discloses a sheath material for a saline-alkaline-resistant dragging cable, a preparation method of the sheath material, the cable and the sheath material. The sheath material is prepared from the following raw materials in parts by weight: 40 to 45 parts of chlorinated polyethylene, 1.5 to 2.0 parts of dicumyl peroxide vulcanizing agent, 2 to 2.5 parts of triisocyanate vulcanizing agent, 0.1 to 0.3 part of ethylene thiourea accelerant, 0.05 to 0.15 part of anti-aging agent RD, 4 to 5 parts of metal oxide, 1 to 1.5 parts of paraffin, 8 to 10 parts of calcium carbonate, 15 to 21 parts of reinforcing agent, 1 to 1.5 parts of lead stearate, 0.5 to 1 part of lead sulfate tribasic, 1 to 1.5 parts of ultraviolet light absorber, 3 to 5 parts of epoxidized soybean oil and 8 to 8 parts of chlorinated paraffin. 9 parts of antimony trioxide and 3-4 parts of antimony trioxide. The cable has the advantages of ultraviolet resistance, no salt deposition, water resistance, tensile resistance, cold resistance and the like, can be used for a long time in a special operating environment, has the service life of at least more than 3 years, and avoids frequent replacement of the cable by a user.

The invention discloses an anti-corrosion fireproof coating applied to a new energy battery box and a preparation method, and relates to the technical field of industrial coatings, the anti-corrosion fireproof coating comprises the following specific components: a base resin system, a curing agent, a functional filler system, a flame retardant system, a solvent system and an auxiliary agent system; the anticorrosive and fireproof coating further comprises additives, wherein the additives specifically comprise a functionalized MXene loaded lithium ion adsorbent, a metal organic framework encapsulated quaternary phosphonium salt, polyaryletherketone coated antimony trioxide nano-particles and boron-nitrogen co-doped graphene aerogel powder; the material is prepared based on the materials. According to the invention, multiple additives are synergistically introduced into a traditional basic coating system, and on the basis of a basic flame-retardant and anti-corrosion structure, lithium ion directional adsorption, gas-phase free radical active intervention, high-temperature carbonization barrier construction and three-dimensional thermal barrier network configuration are further realized; therefore, the multi-dimensional safety performance of the coating in battery thermal runaway, salt spray corrosion and high-temperature impact environments is remarkably improved.

The invention relates to the technical field of piezoelectric light-transmitting functional ceramics, and discloses a high-light-transmitting ceramic material and a preparation method thereof.The preparation method comprises the following preparation steps that sodium carbonate, potassium carbonate, niobium pentoxide, antimony trioxide, samarium oxide and zirconium dioxide powder raw materials are taken, and after primary ball milling and drying are conducted on the powder raw materials, mixed powder is obtained; carrying out pre-sintering and secondary ball milling on the mixed powder, carrying out compression molding to form a tablet, and sintering and polishing the tablet to obtain a ceramic matrix; and spraying the composite slurry to the surface of a ceramic matrix, carrying out heat treatment, and cooling to room temperature to obtain the high-transmittance ceramic material. The antimony trioxide, the samarium oxide and the zirconium dioxide are co-doped, an antimony-samarium-zirconium liquid phase is generated in the ceramic material, pores of the ceramic material are filled and eliminated, and the prepared ceramic material has excellent optical transmittance, piezoelectric property and mechanical strength.

The invention relates to the technical field of high polymer materials, in particular to a light-aging-resistant flame-retardant ABS material for an electric fitting box and a preparation method of the light-aging-resistant flame-retardant ABS material. Comprising the following raw materials: ABS resin, AS resin, ABS high rubber powder, CPE, bromotriazine, carrier-free antimony trioxide master batch, a flame retardant synergist, precipitated barium sulphate, titanium dioxide, a main antioxidant, an auxiliary antioxidant, a lubricant, an anti-dripping agent, a dispersing agent and an ultraviolet absorbent. The material has excellent flame retardant property, and the synergistic effect of the flame retardant components such as the bromotriazine and the like reaches a high flame retardant grade; the ultraviolet absorbent and the titanium dioxide can delay aging and stabilize the color; the melt flow rate is high, and the fluidity is improved through cooperation of high-melt-index ABS and low-molecular-weight AS resin; the mechanical property is good, and the raw materials cooperate to guarantee strength and toughness; the appearance quality is good, pocking marks are avoided, and the glossiness is good. The preparation process is simple, and conventional equipment and reasonable parameters ensure stability and operability.

The invention discloses a phosphorus-tin-based flame retardant synergistic flame-retardant epoxy resin composition and a preparation method thereof, and belongs to the technical field of high polymer material modification and flame retardance. The preparation process of the flame-retardant epoxy resin composition comprises the following steps: respectively adding the phosphorus-based flame retardant, the tin-based flame retardant and the curing agent into the epoxy resin, uniformly mixing, pouring into a mold, and curing to obtain the flame-retardant epoxy resin composition. The phosphorus-based flame retardant and tin-based flame retardant synergistic flame-retardant epoxy resin composition has the advantages of good flame retardance, smoke suppression and thermal stability, low carbon, environmental protection and the like. The flame-retardant system overcomes the defect that toxic smoke and corrosive gas can be generated in the combustion process of traditional halogen-series flame retardants, antimony trioxide flame retardants and the like, and becomes one of environment-friendly flame retardants which reduce halogen and replace antimony trioxide.

The invention discloses a lead-sodium storage battery positive electrode lead paste in the technical field of storage batteries. The lead-sodium storage battery positive electrode lead paste comprises the following components in parts by weight: 100 parts of lead oxide powder, 6-10 parts of sulfuric acid, 14-24 parts of deionized water, 0.05-0.07 part of short fibers, 2-8 parts of lead dioxide, 1-2 parts of tetrabasic lead sulfate, 0.5-1.5 parts of calcium sulfate, 0.05-0.15 part of stannous sulfate, 0.05-0.15 part of antimony trioxide, 0.5-1 part of carbon black, 0.1-0.2 part of carboxymethyl cellulose sodium and 0.1-0.5 part of a mixed carbon material. By improving the design of the process, the formation efficiency and low-temperature performance of the storage battery can be effectively improved, and the service life of the storage battery can be effectively prolonged.

The invention discloses a flame-retardant flat flexible high-current cable and a preparation method thereof, and relates to the technical field of cables. The cable comprises a flat conductor, an insulating layer, a shielding layer, a reinforcing layer and a sheath layer, the insulating layer contains 85-90 parts of low-density polyethylene, 1.2-1.5 parts of dicumyl peroxide, 12-15 parts of modified aluminum hydroxide and the like; and the sheath layer contains 42-50 parts of modified chlorinated polyethylene, 28-34 parts of modified aluminum hydroxide and the like. The modified chlorinated polyethylene is prepared through a three-step extrusion reaction, and the modified aluminum hydroxide is subjected to coupling agent treatment, coating modification and carbon nanotube composite modification. The flame-retardant flat flexible large-current cable has prominent advantages, an efficient flame-retardant system is constructed by modified aluminum hydroxide and antimony trioxide, and the V-0 level requirement of UL94 can be met; the flat structure is combined with the modified chlorinated polyethylene, so that the flexibility is excellent and the temperature-resistant range is wide. The design of the insulating layer and the shielding layer ensures excellent electrical performance, segmented temperature control and accurate parameter regulation and control are performed in preparation, stable product quality is ensured, and the device can adapt to a large-current application scene.

This application relates to the field of metal surface treatment materials, specifically disclosing a silicon-integrated inorganic supercrystalline thermal energy powder and its preparation and application methods. The silicon-integrated inorganic supercrystalline thermal energy powder comprises raw material A and raw material B. Raw material A includes the following: magnesium oxide, sodium fluoroaluminate, sodium polyphosphate, zinc oxide, crystalline tin tetrachloride, silicon dioxide, and boric acid. Raw material B includes the following raw materials in parts by weight: spodumene, lithium carbonate, titanium dioxide, zinc silicate, sodium carbonate, antimony trioxide, albite, fluorite, boric acid, sodium hydroxide, and yttrium oxide. The inorganic supercrystalline thermal energy powder of this application has advantages such as corrosion resistance and oxidation resistance, good thermal stability, no damage from thermal cycling, high hardness, wear resistance and high temperature resistance, energy saving, water scale reduction, and the ability to replace organosilicon high-temperature resistant special coatings, baking paints, enamel paints, and ceramic floor glazes.

The invention relates to the field of high polymer materials, in particular to a PVC (polyvinyl chloride) modified resin composition, PVC modified resin as well as a preparation method and application thereof. According to the PVC modified resin provided by the invention, MBS and / or CPE are / is used as a flexibilizer of PVC, and the tensile elongation at break and impact strength of PVC are effectively improved by using an orthophthalic plasticizer, so that the defect of serious brittleness of PVC is overcome, and the PVC modified resin is suitable for various processing requirements; the surface resistance of the PVC modified resin is obviously reduced by combining conductive carbon black, and the flame retardant property is improved by combining antimony trioxide. The PVC modified resin provided by the invention is simple in blending modification preparation process and wide in application field as a PVC modified resin product, and various PVC series products, such as mine pipelines, plates or injection molding plastic parts, which can meet the requirements of different purposes can be obtained by regulating and controlling the formula.

The invention belongs to the technical field of PVC coated cloth, and particularly relates to environment-friendly welding-resistant low-cost coated cloth meeting the BS7837 standard. The coated fabric is a PVC coated fabric, and a PVC coated fabric coating taking WSFR-9702, antimony trioxide and decabromodiphenyl ethane as flame retardants is obtained through a large number of screening, so that the coated fabric simultaneously meets the comprehensive performance requirements of meeting the high flame retardance requirement of the BS7837 standard, meeting the high environmental protection requirement of the REACH regulation, being resistant to welding, low in cost, free of precipitation, folding white and the like; therefore, the method has the advantages of environmental protection, cost reduction and quality improvement, the comprehensive competitive advantage of the product is improved, and the method has great industrial application value.

The invention relates to a flame-retardant composition, a flame-retardant layer and a new energy automobile power battery comprising the flame-retardant layer. The flame-retardant composition comprises the following components in percentage by weight: 50-68% of matrix resin which is a mixture of polycarbonate and polyphenyl ether in a weight ratio of (1: 1)-(3: 1); the composite flame retardant comprises a phosphate flame retardant, a cyanamide flame retardant and an inorganic flame retardant according to the weight ratio of 1: (0.5-0.8): (2-2.5), and the inorganic flame retardant is selected from one or more of aluminum hydroxide, antimony trioxide, magnesium hydroxide and zinc borate; 10-20% by weight of a thermally conductive agent; 5 to 10 wt% of a silane coupling agent; and 1-3 wt% of a lubricant. A flame-retardant layer formed by the flame-retardant composition is arranged between a power battery module and an aluminum shell of the new energy automobile power battery, has good flame retardance, heat conduction and mechanical properties, and can meet the use requirements of the new energy automobile power battery.

A positive electrode lead paste for a high-capacity and long-service-life storage battery and a preparation method therefor. The formula of the positive electrode lead paste comprises lead powder, dilute sulfuric acid, water and additives. In parts by mass, the additives added to every 1000 parts of the lead powder comprise: 1-3 parts of sodium perborate; 0.5-2 parts of 4BS; 1-3 parts of antimony trioxide; 1-3 parts of tin pyrophosphate; 2-4 parts of a polyolefin; 2-4 parts of a conductive carbon material; and 1-1.5 parts of a polyester staple fiber. By adding tin pyrophosphate and the polyolefin in the positive electrode lead paste, the capacity of a lead storage battery can be effectively increased and the service life thereof can be prolonged; and tin pyrophosphate and the polyolefin can work synergistically, and the addition of the two together achieves a better effect.

The invention relates to the technical processing field of copper powder columns, in particular to a production process of an integrated supporting copper powder column and a VC vapor chamber, and the production process comprises the following steps that a mold is provided with a plurality of powder containing units, each powder containing unit is provided with a plurality of powder preparing grooves, and the adjacent powder preparing grooves are connected through a channel; the preparation method comprises the following steps: uniformly stirring copper powder, bismuth trioxide, antimony trioxide, silver, rosin resin, an adhesive, carbon nanotubes, a pore forming agent and water to obtain mixed powder; filling the mixed powder into a powder making groove and a channel; inserting the mixed powder into the center of the powder making tank filled with the mixed powder to obtain a pre-fired product; and preheating the pre-fired product in an environment with the temperature of 200-300 DEG C, preserving heat for 40-60 minutes at the temperature of 600-800 DEG C, preserving heat for 2-3 hours at the temperature of 1070-1100 DEG C, cooling to 20-30 DEG C, and demolding to obtain a finished product. Through the design of the powder containing unit of the mold, copper column inserting firing is matched after powder filling, an integrated supporting structure is formed, the overall stability of the supporting column is enhanced, different height requirements are met, collapse and falling are avoided, and the use stability of the vapor chamber is guaranteed.

A preparation method of 5N high-purity antimony comprises the following steps: (1) hydrolysis: taking ethylene glycol antimony as a raw material, and carrying out pyrohydrolysis pretreatment to obtain antimony trioxide; (2) biological reduction: uniformly mixing antimony trioxide with an organic catalytic reduction covering agent, and carrying out reduction smelting to prepare 4N antimony; and (3) vacuum distillation: the 4N antimony is subjected to two-stage vacuum distillation, namely first-stage high-temperature vacuum distillation and second-stage low-temperature vacuum distillation, and the 5N high-purity antimony is obtained. According to the method, an ethylene glycol antimony product is adopted as a raw material and subjected to hydrolysis-biological reduction and multi-field synergistic enhanced vacuum distillation to obtain 5N high-purity antimony, the total amount of impurity elements of the product is controlled to be 10 ppm or below, the content of key impurity elements As is controlled to be 1 ppm or below, the content of Pb is controlled to be 0.2 ppm or below, the content of Bi is controlled to be 0.2 ppm or below, the content of Cu is controlled to be 0.05 ppm or below, and the content of Fe is controlled to be 0.5 ppm or below.

The invention belongs to the technical field of high polymer materials, and particularly relates to a polyolefin composite material as well as a preparation method and application thereof. The polyolefin composite material is prepared from the following raw materials: polyethylene, a polyolefin toughening agent, a compound flame retardant and a filler, the melt index of the polyethylene at 190 DEG C / 2.16 kg is greater than or equal to 18 g / 10 min, and the bending modulus is less than or equal to 160 MPa; the polyolefin toughening agent is selected from at least one of an ethylene-propylene copolymer, an ethylene-butylene copolymer and an ethylene-vinyl acetate copolymer, and the melt index at 230 DEG C / 2.16 kg is greater than or equal to 9 g / 10 min; the compound flame retardant comprises tetrabromobisphenol S bis (2, 3-dibromopropyl) ether, antimony trioxide and hydroquinone bis (diphenyl phosphate), and the filler is at least one of talcum powder, barium sulfate and wollastonite. Through specific types of polyethylene, the polyolefin flexibilizer, the compound flame retardant and the filler, excellent flame retardance and toughness can be obtained.

The invention provides a synergistic flame retardant-reinforced integrated antimony trioxide substitute flame retardant and a preparation method thereof, and belongs to the technical field of flame retardants. The preparation method comprises the steps of preparing a nickel-iron compound, preparing functional composite powder and mixing. The step of preparing the nickel-iron compound comprises the following steps: heating deionized water to 60-65 DEG C, adding nickel nitrate and ferric nitrate, uniformly stirring, adding a cerium nitrate solution and citric acid, stirring for 30-35 minutes, adding ethylene glycol and a kH560 coupling agent solution, stirring for 1.5-2.0 hours, standing, aging, drying, keeping the temperature at 320-350 DEG C for 1.0-1.2 hours, and keeping the temperature at 620-630 DEG C for 3.5-4.0 hours to obtain the nickel-iron compound; the antimony trioxide substituted flame retardant disclosed by the invention can completely and equivalently replace antimony trioxide in the field, and is high in flame retardant property, mechanical property and stability.

The invention provides a PVC (polyvinyl chloride) plate for a refrigerator back plate, which is prepared from the following raw materials: 50 to 75 parts of PVC resin, 5 to 20 parts of chlorinated polyvinyl chloride, 5 to 15 parts of phosphorus-nitrogen flame retardant, 5 to 20 parts of inorganic flame retardant, 3 to 10 parts of mica powder, 3 to 10 parts of plasticizer, 0.2 to 3 parts of heat stabilizer, 0.2 to 3 parts of lubricant, 0.2 to 3 parts of coupling agent, 0.3 to 3 parts of nucleating agent, 0.5 to 1 part of antioxidant and 2 to 10 parts of processing aid. The phosphorus-nitrogen flame retardant is one or a combination of melamine polyphosphate, ammonium polyphosphate and phosphazene flame retardants; the inorganic flame retardant is one or a combination of aluminum hydroxide, magnesium hydroxide and antimony trioxide. The composition of the flame retardant in the PVC board is regulated and controlled, and the flame retardant property of the refrigerator back board can be greatly improved by compounding the phosphorus-nitrogen intumescent flame retardant and the inorganic flame retardant, so that the flame retardant property of the refrigerator back board reaches the 5VA grade and meets the industrial standard.

The invention relates to the technical field of power cables, and provides a flame-retardant power cable and a preparation method thereof. The flame-retardant power cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer is prepared from, by weight, 40-60 parts of polyethylene, 60-80 parts of ethylene-vinyl acetate copolymer, 8-10 parts of compatilizer, 3-5 parts of auxiliaries, 15-20 parts of filler and 60-70 parts of flame retardant. The flame retardant is prepared from magnesium hydroxide, antimony trioxide, hydrated zinc borate and an aromatic bromine-containing compound in a mass ratio of 45: 8: 12: (25-30), and the number of bromine atoms of the aromatic bromine-containing compound is 6-8. According to the technical scheme, the problem of insufficient flame retardant property of the power cable in the prior art is solved.

The invention provides high-strength flame-retardant plastic and a preparation method thereof. The high-strength flame-retardant plastic is prepared from the following components: pre-irradiated polyhedral oligomeric silsesquioxane reinforced polypropylene, a flame retardant compound, a flame-retardant synergist, a lubricant and an antioxidant. Wherein the flame retardant compound is prepared by compounding at least two of a hyperbranched triazine charring agent, ammonium polyphosphate, melamine polyphosphate and antimony trioxide. The prepared high-strength flame-retardant plastic has stable char forming property and mechanical property, polypropylene is reinforced by using pre-irradiated polyhedral oligomeric silsesquioxane, so that free radicals are generated on the surface of the polyhedral oligomeric silsesquioxane and can form chemical bonds with a polypropylene chain, the interface bonding force is enhanced, and the mechanical property loss caused by addition of a flame retardant is counteracted. And on the other hand, the problem of poor thermal stability of polypropylene after irradiation can be solved.

The invention relates to the field of conductive film material processing, and particularly discloses a preparation process of a high-transparency conductive film, which comprises the following steps: S1, mixing aluminum oxide and zinc oxide to obtain mixed powder, grinding, and sintering to obtain an AZO target material; antimony trioxide and tin oxide are mixed to obtain a mixture, and the mixture is sintered into an ATO target material after being subjected to spheroidal graphite treatment; s2, mixing an AZO target material and an ATO target material to obtain a composite material, stirring to obtain a mixed material, sputtering the mixed material on a substrate through magnetron sputtering, controlling the preheating temperature of the substrate at 55-65 DEG C, and coating to obtain a finished product, the transparent conductive film has the advantages of high transparency, good conductivity and good flexibility.

The invention discloses a flame-retardant wear-resistant conveying belt for a coal mine and a preparation method thereof, and belongs to the technical field of wear-resistant conveying belts. Substances such as calcium nitrate tetrahydrate, ferric nitrate nonahydrate and antimony trioxide are subjected to hydrothermal coprecipitation to obtain multifunctional composite microspheres, the microspheres are aminated through a silane coupling agent KH-550 and then coated with silicon carbide, and coated composite microspheres are obtained; the preparation method comprises the following steps: carrying out graft copolymerization on nitrile rubber, octavinyl silsesquioxane and DOPO acrylate, compounding a quaternary phosphonium salt flame retardant to obtain modified nitrile rubber, carrying out three-stage mixing on the modified nitrile rubber, coated composite microspheres, conductive carbon black and other substances to obtain a rubber coating layer, carrying out double-sided calendering on the rubber coating layer and an epoxy resin plasticized aramid fiber skeleton layer, and carrying out vulcanization molding to obtain the composite material. And finally obtaining the flame-retardant wear-resistant conveying belt for the coal mine. The synergistic effect of high flame retardance, strong wear resistance and static electricity resistance is achieved, and the service life is prolonged.

The preparation method comprises the following steps: sequentially carrying out esterification reaction and polycondensation reaction on terephthalic acid, ethylene glycol, equol or a derivative thereof in the presence of the catalyst to generate the modified polyester, wherein the catalyst is prepared by enabling antimony trioxide, stannous octoate, tetrabutyl titanate and triphenyl phosphite to react in a solvent at the temperature of 100 DEG C or above; the modified polyester prepared by the method has relatively high intrinsic viscosity and fracture tensile strength, can meet the application requirements of special high polymer materials, and solves the problem that the application of semi-biomass PET copolyester in the field of special high polymer materials is limited in the prior art.

The application discloses a kind of flame-retardant ABS compositions, by parts by weight, including the following components: ABS resin 70-80 parts;Bromine flame retardant 16-20 parts;Aluminum phosphonate flame retardant 3-5 parts;Guanyl phosphate flame retardant 1-2 parts.The application can achieve 1.5mm V-0 flame retardation without adding antimony trioxide by compounding bromine flame retardant, aluminum phosphonate flame retardant, guanyl phosphate flame retardant, and has the advantages of high melt flowability, low density, good toughness, suitable for preparing lightweight vehicle parts.

The present invention discloses a PVC film and a preparation method thereof, as well as a flame-retardant and stable light box cover and a preparation method thereof. The light box cover comprises the following components by weight: 70-100 parts PVC powder, 25-60 parts plasticizer, 1-8 parts stabilizer, 30-150 parts calcium powder, 5-10 parts titanium dioxide, and 5-30 parts flame retardant; the flame retardant is a mixture of antimony trioxide and a composite flame retardant containing silicon, zinc, and boron. The PVC film and preparation method thereof, as well as the flame-retardant and stable light box cover and a preparation method thereof, can improve the thermal stability and anti-melting properties of the product and reduce production costs.

The invention discloses a preparation method of high-catalytic-activity ethylene glycol antimony applied to PET production, and relates to the technical field of ethylene glycol antimony. The preparation method comprises the following steps: uniformly mixing and stirring ethylene glycol and antimony trioxide; adding a crystal structure regulating agent, a surfactant and a synergistic catalyst; heating, stirring and reacting to generate liquid ethylene glycol antimony; filtering to obtain clear liquid ethylene glycol antimony; crystallizing, cooling and separating out crystals; separating out crystals and drying to obtain a finished product of ethylene glycol antimony; the crystal structure regulating agent is selected from at least one of metal organic compounds or metal salts; the surfactant is selected from at least one of a nonionic surfactant or a silane coupling agent; the synergistic catalyst is selected from phosphorus-containing organic compounds. Through combined use of the crystal structure regulating agent, the surfactant and the synergistic catalyst, the catalytic activity, the selectivity and the dispersity of ethylene glycol antimony are improved, and the stability and the reusability of the ethylene glycol antimony are improved.

The invention discloses an ABS (Acrylonitrile Butadiene Styrene) composite material and a preparation method thereof, and belongs to the technical field of high polymer materials, and the ABS composite material comprises the following raw materials in parts by weight: 41-70 parts of ABS resin, 14-24 parts of a flame retardant, 4-10 parts of modified basalt fiber, 10-20 parts of mint fiber antibacterial master batch and 2.2-6 parts of other auxiliaries. According to the flame retardant, the brominated flame retardant, the antimony trioxide and the piperazine pyrophosphate are compounded and have a good synergistic effect on improving the flame retardance, and the modified basalt fibers can improve the screw torque of the material, avoid the screw cracking problem and improve the flame retardance of the material at the same time. In addition, the mint fiber antibacterial master batch is adopted, so that bacterium breeding can be effectively inhibited, and the antibacterial property of the ABS material is improved.

The invention provides a high-performance flame-retardant nylon composite material and a preparation method thereof, and belongs to the technical field of flame-retardant nylon composite materials. The high-performance flame-retardant composite material comprises the following raw material components: glass fibers, antimony trioxide, brominated polystyrene, an acid-binding agent, nylon 6, a composite antioxidant, a heat stabilizer and a lubricant. The high-performance flame-retardant nylon composite material disclosed by the invention has excellent mechanical property, flame retardance and whiteness.

The invention discloses a germanium telluride thermoelectric fiber coated by interface modified high borosilicate glass and a preparation method of the germanium telluride thermoelectric fiber. The preparation method comprises the following steps: placing columnar antimony trioxide in a cladding glass tube in an inert environment, heating a high borosilicate glass tube to a temperature above the melting point of the antimony trioxide, and carrying out antimony ion thermal diffusion treatment in which the molten antimony trioxide is thermally diffused to the inner wall of the glass tube; after the diffusion is finished, quickly pouring the antimony trioxide melt out of the cladding glass tube, and cooling to room temperature to obtain an interface modified glass tube; and then in an inert environment, placing the columnar germanium telluride in an interface modified glass tube with the inner surface modified, heating to a temperature above a high temperature point of a germanium telluride melting point and a high borosilicate glass softening point, melting, and drawing at 900 + / -50 DEG C to prepare the germanium telluride thermoelectric fiber which has a continuous fiber core and passes through an interface modified high borosilicate glass cladding. The problem that the composite thermoelectric fiber with the continuous fiber core cannot be drawn in the prior art is effectively solved.

The invention belongs to the technical field of flame-retardant sponges, and discloses a carbonized flame-retardant chloroprene rubber sponge rubber plate with an open pore structure. Comprising 100 parts of chloroprene rubber, 4 parts of high-activity magnesium oxide, 5 parts of zinc oxide, 1 part of stearic acid, 0.5-1.5 parts of an accelerant DBTU, 1-1.5 parts of an accelerant ETU, 2 parts of an anti-aging agent, 3-5 parts of a foaming agent, 3-6 parts of a foaming promoter, 2-3 parts of PEG4000, 5-8 parts of a flame retardant TPP, 20-30 parts of zinc borate, 20-30 parts of antimony trioxide, 20-30 parts of a flame retardant, 10-15 parts of precipitated white carbon black and 15-20 parts of dibutyl phthalate. The foaming agent and the foaming aid are composed of a foaming agent H, urea ester and diethylene glycol. The advantages of chloroprene rubber are fused, flame-retardant auxiliaries including triphenyl phosphate, antimony trioxide, zinc borate, tris (2, 3-dibromopropyl) isocyanuric acid ester and triallyl isocyanuric acid ester are added, and the multiple auxiliaries have a synergistic effect to form a main flame-retardant action mechanism including heat absorption, dehydration, air isolation and rapid charring.

This invention discloses a flame-retardant PBT composite material, comprising the following components by weight: 40-73 parts PBT; 0.8-3.2 parts alkali lignin; 13-18 parts brominated flame retardant; 3-5 parts antimony trioxide; and 0.5-1 parts pentaerythritol. The weight-average molecular weight of the alkali lignin is 3000-10000. By selecting alkali lignin and pentaerythritol with specific molecular weights and using antimony trioxide as a laser color developer, this invention can effectively improve the laser marking defects of PBT composite materials modified with brominated flame retardants and has the advantage of thin-walled flame retardancy.