130results about How to "Low expansion" patented technology

An aluminum titanate-based ceramic article having a composition comprising u (Al2O3—TiO2)+v (R)+w (3Al2O3—2SiO2)+x (Al2O3)+y (SiO2)+z (1.1SrO-1.5Al2O3-13.6SiO2—TiO2)+a (Fe2O3—TiO2)+b (MgO-2TiO2), where, R is SrO—Al2O3-2SiO2 or 11.2SrO-10.9Al2O3-24.1SiO2—TiO2, where u, v, w, x, y, z, a and b are weight fractions of each component such that (u+v+w+x+y+z+a+b=1), and 0.5<u≦0.95, 0.01<v≦0.5, 0.01<w≦0.5, 0≦x≦0.5, 0≦y≦0.1, 0≦z≦0.5, 0<a≦0.3, and 0≦b≦0.3. A method of forming the ceramic article is provided. The ceramic article is useful in automotive emissions control systems, such as diesel exhaust filtration.

A wall construction for a combustion chamber or thrust nozzle of a high power engine of a flying body includes an inner wall body that is subjected to the hot gases within the combustion chamber, and an outer jacket that surrounds the inner wall body and carries the mechanical loads. The inner wall body has a plurality of cooling channels through which a cooling medium may flow. The outer jacket is made of a long-fiber C / SiC composite material, while the inner wall member is made of a short fiber C / SiC composite material. The reduced thermal expansion coefficient of this ceramic composite material in comparison to metal alloys leads to a reduced straining and reduced deformation of the wall construction and therewith an increased operating life.

The invention discloses a process for preparing coal-based agglomerated activated carbon. The process has the following beneficial effects: the non-caking coal produced in the wide ditches is taken as a main raw material; the special caking coal type, namely gas-fat coal, is blended in the coal blending procedure; furthermore, the oxidation procedure is added in the process; the process parameters such as pulverized coal particle distribution, forming pressure, coal activation temperature and time and the like in the general production process are adjusted; at the same time, the slow carbonization technology is used instead of the traditional rapid carbonization procedure; and oxygen-enriched air is fed into activation equipment. The coal-based activated carbon prepared by the process can ensure the product strength and bulk density on the basis of satisfying the iodine adsorption of the activated carbon and is better in industrial application value.

A high-performance organic fibre brake pad comprises the following components according to weight percentages: 5-9% of cashew nut oil friction powder, 4-8% of chromite, 7-10% of barite, 4-7% of calcined petroleum coke, 3-7% of crystalline flake graphite, 3-6% of sepiolite fibre, 4-7% of ceramic fibre, 1.5-3% of antimony sulphide, 4-7% of red copper fibre, 3-5% of glued aluminium silicate fibre, 1-2% of alumina fibre, 8-11% of vermiculite powder, 9-13% of organosilicone phenol-formaldehyde resin, 1-2% of carbon fibre, 5-7% of bastose, 1-2.5% of wood pulp cellulose, 3-6% of viscose fibre, 6-9% of bamboo carbon fibre, 3-5% of nitrile rubber and 0.3-0.5% of zinc oxide. The invention has the advantages of light weight, strong wear resistance, good flexibility, low noise and long service life, and the like, and the friction performance is stable at operating temperature between 100 DEG C and 450 DEG C.

The invention relates to a gel hemostatic material and a preparation method thereof. The gel hemostatic material achieves the effect of blocking hemostasis in such a way that a nucleophilic polymer and an amino acid oligomer are in cross-linking reaction with an electrophile polymer to generate a three-dimensional polymer in situ. A gel hemostatic material composition and a preparation method thereof have the advantages that the raw material ratio is controlled accurately, the reasonable gel forming time can be achieved, the gel forming time is less than 10 seconds, the expected strength is relatively high, and the testing result shows that the elongation at break of the biologic gel hemostatic material is 300-600 percent, and the compression strength of the biologic gel hemostatic material is larger than 3 Mpa; the requirement of surgical operation can be met well.

The invention relates to a preparation method of a micro-expansive graphite anode material which has a controllable expansion times being 2-10. The method includes following steps: mixing a battery-class powdery graphite material, an oxidizing agent and an intercalator according to a mass ratio of 1:0.05-1.0:0.5-10, performing an oxidizing and intercalating process for 30-60 min at 10-40 DEG C; performing a filtering process at room temperature to separate a solid subject, washing the solid subject until a pH value of a filtrate is 6-7; performing a drying process; feeding the solid subject to a horizontal tubular furnace; performing expansion in an inner atmosphere at 200-800 DEG C for 1-30 min; and performing thermal insulation to obtain the anode material.

An ink jet recording element comprising a support having thereon the following layers: a) a cationic mordant for an anionic dye; b) a nonionic or amphoteric material compatible with a) and c); c) colloidal silica; and d) a hydrophilic overcoat in an amount of at least about 0.25 g / m2; wherein either a) or c) can be directly on the support, b) is always between a) and c), and d) is the outermost layer.

This invention relates to a polymeric pharmaceutical dosage form for the delivery, in use, of at least one pharmaceutical composition in a rate-modulated and site-specific manner. The dosage form comprises a biodegradable, polymeric, scaffold incorporating loaded with at least one active pharmaceutical ingredient (API). The polymer or polymers making up the scaffold degrade in a human or animal body in response to or in the absence of specific biological stimuli and, on degradation, release the API or APIs in an area where said stimuli are encountered. Preferably the polymeric scaffold is formed from poly (D1L-lactide) (PLA) and polymethacrylate (Eudragit S100 / ES100) polymers.

The invention discloses a vanadium-contained semimetallic brake block. The vanadium-contained semimetallic brake block includes, by weight, 5-7 parts of red copper fibers, 3-6 parts of potassium hexatitanate whiskers, 4-5 parts of barium sulfate, 15-25 parts of ferrovanadium powder, 4-6 parts of frictional powder, 13-15 parts of short stainless steel fibers, 6-10 parts of graphite, 2-4 parts of cellulosic fibers, 7-9 parts of coke blacking, 1-5 parts of modified resin nitrile fibers, 3-7 parts of chromite ore fine, 1-5 parts of nitrile rubber, 5-9 parts of ceramic adhesive agents and 8-10 parts of spray-bounded aluminum silicate fibers. The brake block obtained by material mixing, steel backing treatment, press molding, heat treatment, packaging and storage is low in wear rate, not prone to being dusty, high in density, good in heat dissipation, small in vibration, low in noise and high in corrosion resistance. The whole manufacturing process is simple, stability is good, cost is low and the cost-performance ratio is high.

The invention discloses a lithium ion capacitor which comprises a membrane, a lithium ion supplying source and a shell and further comprises a cathode piece, an anode piece and organic electrolyte containing lithium. Micro-expansion graphite materials are adopted for the cathode piece to serve as cathode active materials. The micro-expansion graphite materials, a conductive agent and a binding agent are evenly mixed in a solvent according to the mass ratio of 80-90:4-8:6-12, prepared into slurry to be coated on the positive face and the reverse face of a copper foil current collector and dried. The coating thickness of the single face ranges from 30 micron to 100 micron, roll-in is conducted on electrode pieces through a roller press, and the cathode piece of the lithium ion capacitor can be obtained by cutting the electrode pieces obtained after the roll-in is conducted through a dividing and cutting machine.

The invention discloses a castable for a ladle deslagging plate, and a preparation method and an applicable of the castable. The castable for the ladle deslagging plate comprises the following components in parts by weight: 50-70 parts of mullite, 10-20 parts of andalusite, 10-20 parts of bauxite powder, 3-5 parts of pure calcium aluminate cement, 4-6 parts of aluminum oxide micropowder, 3-5 parts of silicon carbide micropowder and 2-3 parts of compound additive, wherein the compound additive is a combination of two or more of organic fiber, steel fiber, and sodium tripolyphosphate or sodium hexametaphosphate. When the castable is cast on the outer surface of the ladle deslagging plate, the service life of the ladle deslagging plate can be prolonged and the preparation cost can be reduced; and the preparation method of the castable for the ladle deslagging plate is simple, and easy to operate.

The invention relates to a refractory material, and in particular relates to a silicon carbide, mullite and andalusite spray coating for a hot-blast stove dome, and the silicon carbide, mullite and andalusite spray coating is used for solving the problems that a casting material adopted for a lining of the hot-blast stove dome in the prior art is difficult in construction and short in service life. The spray coating comprises the following components in parts by mass: 15-25 parts of fused calcium aluminate cement, 0.1-0.3 part of plasticizer, 30-35 parts of mullite with the particle diameter of 3-5mm, 15-23 parts of andalusite, 8-12 parts of silicon carbide with the particle diameter of 0-1mm, 5-8 parts of zirconite and 1-3 parts of aluminum dihydrogen phosphate powder. The andalusite, mullite and silicon carbide are used as main raw materials, so that the creep resistance and low expansion of the spray coating are strengthened; the petrochemical reaction of the andalusite is irreversible at a use temperature, so that the thermal shock resistance of the spray coating is improved, the spray coating has the advantages of good acid corrosion resistance, good volume stability, small high-temperature thermal expansion coefficient and good thermal shock resistance, poor phenomena of masonry deformation, depression, distortion and the like of the lining of the hot-blast stove dome under the long-term high-load working condition are avoided, and the service life of the hot-blast stove dome is prolonged.

The invention relates to a fractured-vuggy reservoir slow-expansion density controllable channel adjusting agent system and a preparation method thereof. The agent system is prepared from, by mass, 8-14% of a main agent, 0.6-1.2% of a crosslinking agent, 0.006-0.01% of an initiator, 0.6%-0.8% of low-temperature slow-expansion granular hectorite nanoparticles, 10-30% of an additive and the balancewater, wherein the additive is a mixture composed of one or two of rubber particles and vermiculite and imvite. The preparation method comprises the following steps that the imvite is added into waterto prepare an imvite dispersion system; the main agent, the crosslinking agent, the initiator and the hectorite nanoparticles are added into the imvite dispersion system to prepare a main agent solution; the rubber particles or the vermiculite are added into the main agent solution to prepare a slow-expansion density controllable channel adjusting agent, and the channel adjusting agent system hascontrollable density and low-temperature slow expansion, and is suitable for deep increase and water plugging of a high-temperature high-salt fractured-vuggy reservoir channel with the mineralizationdegree of 250,000 at 140 DEG C.

The invention discloses a processing method for cleaning perlite. The processing method comprises the following steps: weighing raw materials consisting of, by mass, 68 to 70% of silica, 12.5 to 15% of alumina, 1 to 1.5% of iron oxide, 3.5 to 4% of sodium oxide, 0.5 to 2% of calcium oxide, 3 to 3.5% of potassium oxide, 0.1 to 0.4% of manganese oxide and 4 to 6% of water, with the balance being perlite ore sand; preheating and retaining the raw materials in a preheating furnace with a temperature of 300 to 350 DEG C for 20 to 25 min; then adding the preheated raw materials into an expansion generation furnace and carrying out contact combustion at a temperature of 950 to 1000 DEG C; and carrying out retention for 1 to 5 s after occurrence of expansion so as to prepare the cleaning perlite. The cleaning perlite prepared in the invention has a whiteness as high as more than 98, uniform particle sizes, an average particle size of 1 mm and a porous microstructure, is light, loose and soft, can be crushed by slight pressing of fingers, shows water and oil absorbing ability and good cleaning effect and can be widely used as a raw material for daily washing chemicals like a liquid soap or a hand cleaner.

The invention discloses a structure of an asphalt pavement applicable to very heavy traffic. A wearing layer of the structure adopts 4cm of SBS (styrene butadiene styrene) modified Superpave 12.5 type or AC-13 type modified asphalt concrete; a middle layer of the structure adopts 8-10cm of SBS modified dense gradation LSAM (large stone asphalt mixture)-25; an anti-fatigue layer of the structure adopts 6cm of rich oil LSAM-20 asphalt concrete; a base layer of the structure adopts 36cm of anti-crack stabilized cement; and a subbase layer of the structure adopts treated original cement concrete pavement and treated original asphalt pavement or 18cm of anti-crack stabilized cement. The asphalt pavement structure resists the breaking such as penetrating, cracking, loosing, deforming and the like, resists high-temperature permanent deformation, resists fatigue loading damage, disperses the load, and slows down the reflection crack, so that the problems of rutting deformation resistance and the durability of the very heavy traffic asphalt pavement can be solved, and the service life of the asphalt pavement can be prolonged.

The invention relates to a method for preparing a micro-expanded graphite anode material of which the expansion times are controllable within 2-10 times. The method comprises the following steps: mixing a battery-grade powder graphite material with an oxidizing agent and an intercalator according to a mass ratio of 1 to (0.05-1.0) to (0.5-10), carrying out oxidization and intercalation for 30-60 minutes at 10-40 DEG C, subsequently filtering at the room temperature to separate solid, washing the solid till the pH value of filtrate is 6-7, drying, subsequently feeding into a horizontal tube type furnace for puffing for 1-30 minutes at 200-800 DEG C in the presence of inert atmosphere, and keeping the temperature, thereby obtaining the micro-expanded graphite material.

Disclosed is an optical waveguide-forming curable resin composition and optical waveguide-forming curable dry film which are capable of forming cured resin articles that have high heat resistance, excellent mechanical strength and high transparency, and possess properties required for forming optical waveguides, such as low thermal expansion, low transmission loss, etc.The present invention provides a curable resin composition for forming an optical waveguide, the composition comprising a hydrolyzable silyl-containing silane-modified epoxy resin (A) having an average of at least one hydrolyzable silyl group and an average of at least one epoxy group per molecule; and a resin (B) having, per molecule, an average of at least one functional group that is reactive with an epoxy group; and an optical waveguide-forming curable dry film formed using the resin composition.

A thermal barrier coating material, containing a metal binding layer laminated on a base material and a ceramic layer laminated on the metal binding layer, the ceramic layer comprising partially stabilized ZrO2 which is partially stabilized by additives of Dy2O3 and Yb2O3.

A visible light-shielding silicone rubber composition is provided comprising (A) an organopolysiloxane, (B) an organohydrogenpolysiloxane, (C) a platinum catalyst, and (D) an azo dye. The azo dye has a light transmittance≦10% in a wavelength range of up to 650 nm and ≧80% in a wavelength range of at least 750 nm when a solution of the azo dye in ethanol is measured by a spectrophotometer. The composition cures into a film which shields visible light, but transmits IR light and is suited for encapsulation of LED.

The invention aims to provide a silicone rubber insulating fire-resisting flexible cable and can effectively solve the problems that a control cable in the prior art has a high halogen content, is inflammable, generates toxic gas after combustion, and the like. The invention relates to a silicone rubber insulating cladding high temperature resisting flexible cable which comprises an inner core and a cable outer layer clad outside the inner core, wherein the inside of the inner core comprises a conductor wire core, an insulating layer and a fire-resisting layer from inside to outside in sequence; the inside of the cable outer layer comprises a fire-retardant tape and a cladding layer from inside to outside in sequence; and a flame-retardant filler is arranged in a gap between the cable outer layer and the inner core. The invention can realize fire resistance of the cable mainly by cladding mica on the surface of a silicone rubber insulated wire core, and can achieve the effects of fire resistance and flame retardant by using filling materials, tapes, cladding materials and metal materials which are not inflammable or have flame-retardant performance.

The invention discloses a novel rock wool, which consists of the following raw materials according to parts by weight: 55-65 parts of basalt, 20-30 parts of limestone, 10-15 parts of aluminum silicate and 5-10 parts of auxiliary material. The novel rock wool product is low in hardness, good in abrasion resistance, capable of reducing abrasion of the friction material, excellent in high-temperature resistant performance and quite low in heat conductivity coefficient; the novel rock wool, attached on the surface of the friction material, can effectively reduce heat fading property and expansibility of other low-temperature materials in the friction material and improve the stability of the friction material in the processes of manufacturing and using; with comparatively strong adsorbability, the novel rock wool can adsorb various powdery materials, so the stability of the friction material is enhanced; and the novel rock wool is easy to disperse so as to reduce the dust which is irritative to the skin and is favorable for the body health.

The present invention relates to an improved cordierite glass-ceramic. In order to improve the materials properties, it is proposed that the glass-ceramic comprising SiO2, Al2O3, MgO and Li2O contains cordierite as main crystal phase and that a secondary crystal phase of the glass-ceramic comprises high-quartz solid solution and / or keatite solid solution. The invention further relates to a process for producing such a glass-ceramic and the use of such a glass-ceramic.

The invention discloses a cationic polyacrylamide swelled ground modifier and constructing method, which is characterized by the following: weighing 0.2% modifier into dried soil with saturation less than 95%; stirring; dispersing cationic polyacrylamide in the water evenly without knob; reducing the thickness of adsorbing water film on the clay particle surface; reinforcing the stability of soil mass.

The invention provides a preparation method of a silicon dioxide composite material for a negative electrode of a lithium-ion battery. The method comprises three processes, namely preparation of a [carbon nanotube / silicon dioxide] composite material, preparation of a silicon dioxide precursor and preparation of the silicon dioxide composite material. Ethyl alcohol, distilled water, ammonium hydroxide, hexadecyl trimethyl ammonium bromide, acid-treated carbon nanotube, ethyl orthosilicate, deionized water and absolute ethyl alcohol are utilized in the preparation process of the [carbon nanotube / silicon dioxide] composite material. The carbon nanotube in the prepared silicon dioxide composite material has relatively high conductivity, large specific surface area and relatively large expansion coefficient as an inner core; the expansion effect of the silicon dioxide in the charging and discharging process of the lithium-ion battery can be reduced; the structure stability of the silicon dioxide composite material is improved; and the cycle performance of the silicon dioxide composite material is finally improved.

An optical cable (1) comprises a cable sheath (11) and at least two optical transmission elements (101) and (102), which are arranged within the cable sheath (11). One (101) of the optical transmission elements (101) and (102) comprises a buffer tube (1011), at least one optical waveguide (10101) and at least one swelling element (10111). The buffer tube (1011) surrounds the at least one optical waveguide (10101) and the at least one swelling element (10111). The swelling element (10111) comprises a swelling material, which can swell by supplying it with water. If water penetrates into the optical transmission element, the swelling element (10111) swells and seals off the optical transmission element, so that spreading of the water in the longitudinal direction of the optical transmission element is prevented.

An automobile brake lining is prepared from, by weight, 14%-18% of ceramic fibers, 3%-6% of carbon fibers, 3%-7% of cellulose fibers, 8%-13% of aramid fibers, 8%-13% of modified phenolic resin, 2%-4% of aluminium oxide, 3%-5% of barium sulphide, 6%-9% of graphite, 4%-6% of zirconite, 8%-12% of quartz sand, 1%-2% of bauxite, 1%-2% of zinc oxide, 2%-4% of chemigum, 1%-4% of antimony sulfide, 7%-10% of friction powder and 6%-9% of nanometer silicon carbide. According to the automobile brake lining, a ceramic brake pad is kept to be stable in braking, low in noise and the like, the mechanical strength of the brake lining is further improved, and the service life of the brake lining is prolonged; meanwhile, recession and expansion of the high temperature can be avoided, and the automobile brake lining has the advantages of being good in braking performance and abrasion resistance, stable in braking, less in dust, moderate in hardness and good in high temperature recovery performance.

The present invention relates to one kind of composite solid protecting slag with double function for stainless steel cast mold, and features that the composite solid protecting slag consists of: calcium oxide 10-25 wt%, sodium oxide 4-8 wt%, magnesium oxide 15 wt%, Al2O3 10-20 wt%, silica 30-45 wt%, ferric oxide 1-3 wt%, calcium difluoride 5-10 wt%, and carbon 1-3 wt%. The present invention features that the composite solid protecting slag includes heat insulating material with low carbon content, high expansion coefficient and light expanded weight for floating and has no need of adding heating material and heat insulating material, resulting in raised steel ingot quality and steel material utilizing rate.

The invention discloses ion response gel applicable to cement silicate self-repairing systems, a preparation method and an application. Preparation comprises the following steps: preparing a biogel solution containing a polyhydroxy complexing structure; dropping the biogel solution to a divalent cation coagulating bath under stirring, and performing standing and drying to obtain the gel. Water isadopted as the solvent, so that little pollution is produced, cost is low, and the method is simple. The ion response gel based on water swelling and deposition reaction with divalent ions is applicable to various self-repairing systems and has low dependence on external repairing conditions. The expansibility is low in an initial hydration stage under the ion response action, and mechanical property loss of a cement matrix is reduced greatly; by the deposition reaction of the internally crosslinking divalent cations with the ambient environment, deposition of a self-repairing product is accelerated, and interfacial adhesion between the self-repairing gel and the cement matrix is improved. Subjective time of repairing is shortened by means of crack sealing and deposition of the self-repairing product, and the gel can adapt to short-time repairing work and can be used independently.

A hollow / porous silicon-based composite material includes a hollow / porous structure, a silicon-carbon composite layer and a carbon coating layer. The silicon-carbon composite layer is formed by uniformly dispersing nano silicon / silicon oxide in a conductive carbon mesh formed by high-temperature pyrolysis of a binder. The composite material is prepared by uniformly mixing nano silicon / silicon oxide, the binder and the salt, and then carrying out spray granulation, high-temperature sintering, water washing for desalination, and a coating treatment. The grain growth of the silicon material is slowed down during the heat treatment process, the pulverization of the material is effectively avoided, the volume expansion effect of the silicon-based material is alleviated, the cycle performance of the silicon-based material is improved, and the conductivity and rate performance of the material is enhanced. The silicon-based composite material is a silicon-carbon cathode material for lithium ion batteries with high first-cycle efficiency, low expansion and long cycle.