2168results about How to "Good insulation performance" patented technology

The heat insulating composite aerogel material consists of silica aerogel, titania as infrared opacifier and reinforcing fiber in the weight ratio of 1 to 0.1-0.7 to 0.7-3. Its preparation process includes compounding sol with silanolate, surface modifier, titanolate, alcohol solvent, acid catalyst and alkaline catalyst in certain proportion; soaking fiber felt or prefabricated fiber part in the sol; and supercritical fluid drying. The material of the present invention has high blocking effect on solid heat transfer, air heat transfer and infrared radiation heat transfer, excellent hydrophobicity, simple preparation process, low cost, mechanical strength over 2 MPa, and wide application range, and may be used in strict heat protection condition in aeronautics, astronautics, military and civil uses.

The invention relates to a super-hydrophobic polyurethane/ oxide nano particle hybrid coating and a preparation method thereof. The super-hydrophobic coating is prepared by oxide nano particles, silane coupling agent and polyurethane which have wide material source and are easily obtained through a self-assembly method, and has the contact angle of 140-168 degrees and the rolling angle of 1-20 degrees as well as good visible light permeability. The invention solves the problems that the currently prepared transparent super-hydrophobic coating needs extremely low surface energy perfluorinated silane modification, has high production cost and complicated technique, and can not realize large-scale production. The method has simple technique, easily obtained raw material and low cost; and theprepared super-hydrophobic coating can be taken as a dustproof and antifogging protective coating of the surface of solids such as glass and the like, and a waterproof insulating layer used in a micro-electronic device, a sensor and the like.

The invention provides a thermal insulation and heat preservation slurry composition, which comprises the following components, by weight, 20-60 parts of an inorganic powder binder, 15-40 parts of a lightweight aggregate, 10-25 parts of a magnesium-containing mineral, 10-15 parts of reinforcing fibers, and a proper amount of water. The present invention further provides a thermal insulation and heat preservation plate containing the thermal insulation and heat preservation slurry composition, wherein the thermal insulation and heat preservation plate comprises one or more than two thermal insulation and heat preservation material layers, and thermal insulation and heat preservation slurry layers covered on both surfaces of the thermal insulation and heat preservation material layer. The thermal insulation and heat preservation plate has the following characteristics that: a thermal insulation and heat preservation performance is excellent; non-combustible property is provided, or combustion is not generated when the plate contacts open fire; the plate is mainly prepared from inorganic materials, such that characteristics of no toxic or harmful gas release and the like during use are provided; and the plate can be widely used in cold northern regions, and is the best alternative of polyphenylene plates, polyurethane plates and other materials.

A plurality of thin-wall parts (9a) of a sealant layer (7) are formed in a portion continuously changed in the interval of one sealing part (8) and a gas barrier layer (6) of other laminate film (4). At the inner circumferential side between the adjacent thin-wall parts (9a) and the thin-wall part (9a) at the innermost circumferential side and at the outer circumferential side of the thin-wall part (9a) of the outermost circumferential side, a thick-wall part (9b) of the sealant layer (7) is formed. All of the opposing sealant layers (7) between the two adjacent thin-wall parts (9a) are mutually heated and fused, so that an excellent adiabatic performance is maintained for a long period.

The invention relates to the field of functional coatings and particularly relates to a high-temperature-resisting heat-insulation coating and a preparation method thereof. The high-temperature-resisting heat-insulation coating is composed of the following raw materials in percentage by mass: 10%-40% of high-reflection paint with a shell-core structure, 10%-40% of heat-insulation powder with the shell-core structure, 1%-5% of a toughening agent, 10%-50% of a high-temperature bonding agent, 1%-10% of a coating auxiliary agent, and the balance of water. The preparation method comprises the following steps: mixing, dispersing and grinding raw materials; carrying out homogenization to enable an average grain diameter to be 325-400 meshes; and filtering and packaging to obtain a finished product. The high-temperature-resisting heat-insulation coating can be applied to high-temperature fields of industrial furnaces, industrial boilers, high-temperature steam pipelines, petroleum cracking equipment, engine parts, high-temperature smelting, sintering furnaces and the like, and can be used under a higher temperature for long time; the energy consumption can be saved and the service life of the furnaces is prolonged.

The invention relates to an on-line temperature measuring method for the cable joints of a high voltage device; three temperature sensors are stuck on the surfaces of three metal conductive bodies; current induction coils are sheathed on the metal conductive bodies; a power circuit, microprocessors and wireless emitters are arranged on the metal conductive bodies and sealed in an insulator by circuit boards; the digital identifying codes of the three output ends of the measured cable joints are written in the microprocessors of each own; three metal conductive bodies sealed by insulating materials are respectively arranged at the three-phase output ends of the cable joints; each current induction coil after inducing that the currents are processed by the power circuit provides a working power for the temperature sensor, the microprocessor and the wireless emitter of each own; the microprocessors emit the monitored temperature signals and corresponding identifying codes by the wireless emitters; a wireless receiver receives the wireless electric signals of each circuit, demodulates the wireless electric signals into digital signals and transmits the digital signals to a display instrument; the display instrument receives and identifies three corresponding cable joints. The on-line temperature measuring method can instantly accurately monitor the temperature of the cable joints of the high voltage device on line.

Belonging to the field of heat preservation and thermal insulation materials, the invention puts forward an electrospun micro-nanofiber reinforced aerogel flexible thermal insulation material and its preparation method. The method takes electrospun micro-nanofiber as a reinforcement body, which is mixed with an SiO2 sol. A sol-gel process is employed to prepare an electrospun micro-nanofiber and aerogel composite thermal insulation material with a stable structure under normal temperature and pressure conditions. The method provided in the invention employs micro-nanoscale electrospun micro-nanofiber to reinforce the aerogel, so that the composite material can have better flexibility, interface bonding property and structural integrity. While the mechanical properties of the aerogel thermal insulation composite material are improved, the material also can maintain good thermal insulation performance.

The invention relates to SiO2 nano composite thermal insulation paste, which is characterized in that the form of the SiO2 nano composite thermal insulation paste is a paste mixture, and the dried paste mixture becomes micro pores, nano holes and a fiber structure compound. The paste comprises the following components by weight percentage: 20 to 50 percent of SiO2 nano aerogel, 0 to 30 percent of inorganic closed-hole micro-bead material, 7 to 15 percent of expanded pearlite, 0 to 1 percent of bentonite, 2 to 6 percent of penetrating agent, 10 to 20 percent of adhesive, 3 to 6 percent of calcium silicate fiber, 0 to 5 percent of magnesium aluminum silicate fiber, 0 to 5 percent of aluminum silicate fiber, 0 to 40 percent of water, 0.1 to 2 percent of flame retardant, and 3 to 7 percent of pigment. A preparation device is a vacuum intake and stirring device.

The invention discloses a method for preparing a foamed ceramic insulation board by a waste glass ceramic wafer, belonging to the field of preparation technology of the foamed ceramic insulation board. The method comprises the steps of: washing the waste glass ceramic wafer with clear water, drying and grinding by ball milling to obtain waste glass ceramic powder with the fineness less than or equal to 100mu m; mixing the waste glass ceramic powder, pulverized fuel ash, furnace slag, coal gangue, ceramic tailings, foaming agent and modifying agent according to the mass ratio of (30-40):(10-15):(5-7):(10-18):(25-35):(1.8-2.2):(1.1-1.5); putting the mixture into a ball grinding mill, carrying out wet grinding and evenly mixing to form mixed slurry; drying by a pressure type spray granulation dryer and putting the dried product into a foaming refractory mould coated with aluminum oxide; heating to 1120-1150 DEG C in a heating furnace; and finally, annealing, cooling and cutting to obtain the foamed ceramic insulation board. The method is low in production cost and simple in technology, and can be used for continuously preparing the porous foamed ceramic insulation board with large size; and the product is good in performances.

The invention relates to a hard polyurethane adiabatic heat-insulation foam material and a preparation method thereof. The material contains the following components: polyether glycol, polymethylene polyphenyl isocyanate, chopped glass fiber powder, physical foaming agent, water, fire retardant, catalyst and foam stabilizer. The preparation method comprises that the surface of the chopped glass fiber powder is treated through silane coupling agent; and the polyether glycol, polymethylene polyphenyl isocyanate and the surface-treated chopped glass fiber powder are dried, mixing treatment and polymerization foaming treatment are sequentially conducted thereafter, curing treatment is conducted after a pouring mould blank is obtained and the mould is removed, and finally hard polyurethane foam is obtained. Since the invention adopts the third-generation zero-ozone-consumption latent-energy hydrofluorocarbon foaming agent and the halogen-free high-efficiency fire retardant, the foam material has the advantages of environmental protection, low density and excellent compression property and is suitable for use in the heat insulation field.

The invention discloses a production technology for an autoclaved aerated concrete building block. The production technology is characterized in that the material formula comprises, by weight, 65% of fly ash, 15% of cement, 14% of lime, 5.5% of phosphogypsum and 0.5% of aluminum powder. The production technology comprises the following steps: firstly, slurries are prepared, namely, fly ash is ground by utilization of a ball grinding mill to prepare a fly ash slurry, phosphogypsum is added with water, then stirring is carried out for 1h, a phosphogypsum slurry is prepared, and then lime is crushed and ground to lime powder by utilization of the ball grinding mill; secondly, blending and stirring are carried out, namely, all the materials are sent to a casting mixer, the casting mixer is started, stirring is carried out and a concrete slurry is obtained; thirdly, casting and die entering are carried out, namely, all the concrete slurry in the casting mixer is placed in a die, and casting is carried out; fourthly, namely, a green body is thickened and condensed gradually; fifthly, cutting is carried out, namely, the shaped green body is cut according to a designed size; sixthly, autoclaved curing is carried out, namely, the cut green body is sent to an autoclaved curing kettle for autoclaved curing, and a finished product aerated concrete building block is obtained.

The invention discloses a water-based non-graphite type lubricant, which is characterized by comprising the following ingredients in percentage by weight: 26%-35% of inorganic substance with layered lattice structures, 10%-15% of high-temperature-resistant lubricant, 12%-24% of suspending agent, 30%-47% of high-temperature adhesive and 1%-3% of adjuvant. The water-based non-graphite type lubricant is an environment-friendly lubricant for hot die forging, can replace a graphite type lubricant, and is especially suitable for the hot die forging of metal, in particular, for the hot die forging of large-sized aluminum pieces. The invention further discloses a preparation method of the water-based non-graphite type lubricant. The preparation method has the advantages of simple preparation process and excellent film-forming performance.

The invention provides a method for preparing phenolic resin, which comprises the following steps of: a) mixing molten phenol, a base catalyst and alkali lignin, and heating to the temperature of between 170 and 300DEG C for reflux reaction, wherein the alkali lignin is extracted from crops; and b) adding formaldehyde into reaction liquid obtained in the step a), and reducing temperature to 60-90DEG C for continuous reflux reaction to obtain the phenolic resin. The invention also provides a phenolic resin foaming body, which is obtained by foaming and curing a foamed phenolic resin mixture. Experiments prove that: the phenolic resin foaming body provided by the invention has the density of less than or equal to 50kg/m<3>, the compression strength of more than or equal to 0.18MPa, the tensile strength in the direction vertical to a panel of more than or equal to 0.11MPa, the water absorption of less than or equal to 3 percent, the coefficient of heat conductivity of less than or equal to 0.030W/(m.k), the dimensional stability of less than or equal to 1.5 percent and the combustion performance reaching grade B of GB8624-2006.

The invention discloses a manufacturing method of a flexible heat-sensitive thin film resistor array, which belongs to the field of micro-electromechanical systems (MEMS). The method comprises the following steps: firstly depositing a sacrificial layer on a silicon chip; spin-coating a PI prepolymer on the sacrificial layer, and forming a PI thin film by thermocuring; then spin-coating photoresist, carrying out lithographic patterning, and sputtering a required metal heat-sensitive thin film layer; adopting the stripping method to obtain a pattern of the heat-sensitive thin film layer; then spin-coating the photoresist, carrying out the lithographic patterning, and then electroplating for forming an electrical connection metal layer; removing the photoresist, and then carrying out heat treatment on heat-sensitive resistors; and finally depositing a parylene protective layer, removing the sacrificial layer and then obtaining the flexible thin film resistor array. The flexible heat-sensitive thin film resistor array has simple process, more reliable connectivity of the heat-sensitive resistors, and small interference of conductor resistance, and can greatly improve the measurement precision when being used as a sensing element of a sensor, and be applied in moist, underwater and other environments under the condition of ensuring the sensitivity of the sensor.

The invention discloses a fiber-reinforced flexible SiO2 aerogel heat-insulation material and a preparation method thereof. Silicon-containing substances such as tetraethyl orthosilicate, tetramethoxysilane, sodium silicate and the like are used as precursors, a fiber felt pad is used as a reinforcing body, fiber/SiO2 composite wet gel is prepared with a sol-gel technology, and the fiber-reinforced flexible SiO2 aerogel heat-insulation material is finally prepared through aging and supercritical drying. The synthesis process is simplified, the preparation cycle is shortened, the cost for synthesis of the SiO2 aerogel composite material is effectively reduced, defects of poor mechanical strength, large brittleness and the like of pure aerogel are overcome, the prepared composite aerogel keeps the excellent performance of the aerogel, the flexibility of the material is obviously improved, the material is better in integrity, capable of being bent at will and very good in heat-insulation effect, the heat conductivity of the material can be decreased to 19 mW/mK, the application range of the aerogel is enlarged, and the material can be applied to actual engineering as an independent bulk composite material.

A ceramic aerogel and a method for preparing the ceramic aerogel by gel injection moulding belong to the field of porous materials. The invention solves the problem that the prior aerogel has easily broken and damaged air holes under the action of external force and low heat resistant temperature, and that the porous material prepared by prior gel injection moulding has bad heat-insulating property. The ceramic aerogel forms a three-dimensional skeleton structure by mutually jointing ceramic particles, porosity thereof is 50-90%, the aperture is micrometre-sized, and the most probable aperture can be below 3 microns. The ceramic aerogel is prepared by the gel injection moulding technology under the conditions of low solid phase content and no any foaming agent and pore forming agent. The product of the method has uniform aperture size distribution, heat resistance, thermal insulation and high intensity, is light, and can be used as heat-proof material of high-temperature structure. The heat-resistant temperature thereof is 1000-3000 DEG C and the compressive strength is 1-50 MPa. The method of the invention has a simple technology and short flow, can prepare finished pieces with complex shapes, and is suitable for large-scale industrial production.

The invention discloses light foaming concrete made by waste concrete, and the production method and application of the foaming concrete. The foaming concrete is formed by the mixing of regenerated foaming concrete aggregate formed after the smashing and screening of the waste concrete, jellous slurry formed by adding concrete, fly ash and water, and foam generated by a foaming agent. After on-spot injection, pouring or mould pouring, the foaming concrete can be used in a plurality of aspects in municipal infrastructure construction such as weak subgrade processing, high filling subgrade, road-widening subgrade, temporary subgrade, various underground pipeline foundation, narrow slot and small clearance space filling, road landslide emergency backfilling, building heat preservation, sound insulation walls and the like. The adoption of the waste concrete for making the foaming concrete has the advantages of utilizing the waste, being environment-friendly, saving energy and having low cost, and the like, and the produced foaming concrete has a plurality of good performances such as light weight, no lateral confinement compression resistance, self-compaction and vibro-free property, and the like.

The invention discloses a vacuum insulated panel core material, which comprises the following raw materials in parts by weight: 48 parts of mineral wool, 45 parts of glass fiber wool 27-30 degree SR and 35 parts of glass fiber wool 18 degree SR. The diameter of the fiber of the mineral wool is 4-6 mum, the length is 1.0-4.0mm and the water content is 20 percent. The manufacturing method of the vacuum insulated panel core material comprises the following steps: pumping of glass fiber wool, pulping of mineral wool, dilution and slag removal, regulation of acidity, slag removal and making, drying and cutting. Since the mineral wool is used, the manufacturing cost of the core material is greatly reduced and the insulation performance is improved to certain extent when the vacuum insulated panel core material is compared with pure glass fiber wool core material and other conventional core material.

The invention discloses a functional nonwoven sea water desalination material and a preparation method and application thereof. The sea water desalination material uses non-woven as a basis material, and a carbon material loaded on the surface as a light absorber. The functional nonwoven sea water desalination material internally includes short staple which has a core absorption effect on sea water and provides a water transport corridor, and the pore structure of the material is beneficial to passing of water vapor. The sea water desalination material has a good thermal insulation performance to avoid the loss of solar energy, and as the light absorber, the material has a high utilization rate of solar energy so that the water vapor producing efficiency is high; the material is durable and convenient to transport, and the preparation method has low costs and a simple process.

The invention relates to compound sandwich wall and a fabrication process and components thereof, belonging to the field of construction material. The compound sandwich wall is composed of a structurelayer and an inorganic sandwich layer, wherein the structure layer consists of two layers of plates, and the inorganic sandwich layer is between the two layers of plates; the structure layer is any one plate of timber, compound bamboo, a bamboo glue board, laminated wood, a multilayer plywood and a flakeboard; the inorganic sandwich layer is foamed cement or perlite or vermiculite or a compositeof the foamed cement, the perlite and the vermiculite or other composites based on the foamed cement, the perlite and the vermiculite, and an enhancement type material is added in the inorganic sandwich layer. The wall can be made into section components with convenient construction. The wall or the component can be fabricated by one-time lamination or gelatination and also can be fabricated by naturally composite molding with mechanical pressure or without pressure. The wall has the advantages of light texture, high intensity, high vibration resistance, good sound insulation and heat-insulating properties, good fireproof performance, strong processibility and easy production as well as installation.