33results about How to "Stable high temperature resistance" patented technology

The invention relates to a solder auxiliary soldering method, in particular to a graphene-enhanced Al-based composite solder auxiliary soldering method. The method solves the problems that existing graphene is poor in aluminum base enhancing effect and poor in dispersibility. The method comprises the steps that an oxidized graphene suspension and an aluminum solder suspension are mixed, dried and then placed into a plasma enhanced chemical vapor deposition vacuum device for reduction treatment, then, the mixture is pressed into foils, the graphene/aluminum-based solder foils are placed between to-be-soldered faces of metal to be soldered for vacuum soldering, and the graphene-enhanced Al-based composite solder auxiliary soldering method is completed. The method is used for graphene-enhanced Al-based composite solder auxiliary soldering.

The invention relates to the field of membrane technology, in particular to a high-temperature-resistant precision molecular weight cut-off ultrafiltration membrane and a preparation method thereof. The composition of raw materials and the definition of parameters in the preparation process of the base film ensure that the performance of the prepared wet base film is stable after the subsequent modification treatment, and can effectively improve its high temperature resistance; at the same time, combined with the modification process The definition of time, temperature and treatment method in the process makes the rejection rate of the ultrafiltration membrane to the molecular weight range of 2000-4000 reach more than 90%, which effectively improves the interception of the ultrafiltration membrane to low molecular weight substances and improves the quality of the filtration product .

The invention relates to Bacillus licheniformis for highly producing acid-resistant high-temperature alpha-amylase and a liquid fermentation method of Bacillus licheniformis. Bacillus licheniformis particularly is Bacillus licheniformis M6-X3, and the preservation number of the strain is CGMCC NO.10785; the fermentation activity of an induced strain of Bacillus licheniformis CGMCC NO.10785 in a method for producing cid-resistant high-temperature alpha-amylase by virtue of liquid fermentation is 38000u/mL-42000u/mL; the residual enzyme activity of produced acid-resistant high-temperature alpha-amylase is 95% after the temperature is preserved at 95 DEG C for 3h, and the optimal reaction temperature is 96-100 DEG C, the optimal reaction pH is 4.0-4.5; and Bacillus licheniformis has good high temperature resistance and acid resistance and can be widely applied to various industries including starch processing, beer brewing, fermentation, spinning and the like.

The invention provides furnace-protecting anhydrous stemming which comprises the following raw material chemical components by weight: 15-25% of corundum powder; 15-20% of coke powder; 15-20% of clay powder; 9-14% of silicon carbide powder; 2-4% of asphalt powder; 15-25% of anthracene oil; and 9-11% of titanium dioxide powder. The stemming of the invention has the characteristics of high strength, low shrinkage, and good caking property, has stable high temperature resistance, can be sintered rapidly, can prolong tapping time and ensure tapping smoothness, provides an iron notch drilling-trhough rate of above 95%, avoids the iron-leaking phenomenon and accidents of iron notch fracture and channel enlargement due to a shallow iron notch, increases the smelting intensity, reduces production cost, and ensures the safe running of blast furnace production. Especially, a titanium sediment wear-resistant protection layer with a small thermal conductivity coefficient and good corrosion resistance is formed, which has the effect of protecting the hearth and the furnace wall near the iron notch, and thus prolongs the service life of the blast furnace hearth and the furnace wall.

The invention relates to a secondary lithium ion battery and a preparation method thereof. The secondary lithium ion battery comprises an anode, a cathode, a diaphragm and a non-water electrolyte, wherein the surface of the cathode is coated with a mixture containing an anode exchange mateiral and an inorganic material, the anode exchange material is aluminosilicate or phosphoaluminate containing anions of lithium, sodium and ammonium, the inorganic material is Al2O3 or SiO2, and in addition, the mass ratio of the anode exchange material to the inorganic material is (1:50)-(10:1). Compared with the traditional lithium ion battery, the lithium ion battery disclosed by the invention is obviously promoted in safety performance and cycle performance, and is long service life and suitable for large-scale industrial production.

The invention discloses a preparation method of a mica paperboard. The method comprises the steps: pretreating a mica raw material, and hydraulically stripping the pretreated mica raw material into mica flakes with three different particle sizes of -30 to +60 mesh, -60 to +80 mesh and -120 to +200 mesh; mixing the mica flakes and then mixing with a silicon resin solution prepared from organic silicon resin for pulping; in the pulping process, controlling the mixing ratio, and adding fumed silica as a pore-opening medium; and preparing thick mica paper single sheets from the slurry, laminatingthe thick mica paper single sheets, taking a fiber-reinforced silicon resin solution as an interlayer resin material, carrying out glue layer filling, adjusting the number of laminated layers of the thick mica paper single sheets, putting the thick mica paper single sheets into a hot press, and carrying out three-stage surface hot-pressing curing to obtain the finished mica paperboard. The productis good in quality, high in overall strength, not prone to interlayer stripping and high in conversion energy efficiency, and has good electrical insulation performance and heat dissipation performance.

The invention relates to a method for preparing needle coke by coal-tar asphalt, using the coal-tar asphalt with abundant resource as raw material. The apparatuses including a beaker, an ultrasonic cleaner, a microwave oven, a high temperature furnace, a reaction kettle, a glass test tube, an enameled copper wire, a direct current power supply, a nitrogen bottle, a vacuum pump, an electric cabinet and the like are used to prepare black crystal needle coke by the working procedures of heating and fusion, ultrasonic activation, microwave catalysis, magnetic field induction, high temperature calcinations and the like; and then needle coke is generated by fusing at 150 DEG C, ultrasonically activating at 20 DEG C, catalyzing by microwave at 200 DEG C, inducing by a magnetic field at 420 DEG C, and calcinating at 940 DEG C. The chemical and physical properties of the needle coke are stable; the intensity, the toughness and the high temperature resistance of the needle coke can be increased by 26%; and the product yield is up to 78%. The needle coke can be matched with a plenty of chemical substances to make into a plenty of industrial products such as high temperature-resistant electrode and the like. The preparation method has short technological processes, and is safe, stable and reliable. The method is an ideal method for preparing carbon material crystal needle coke by coal-tar asphalt.

The invention discloses a high-strength thermal-shock-resisting light heat-insulting fireproof brick and a preparation method thereof. The fireproof brick is prepared from the following raw materials in parts by weight: 50-55 parts of a light mullite aggregate, 8-10 parts of alpha-Al2O3 micro-powder, 12-15 parts of electric-melt mullite powder, 18-22 parts of talcum powder, 5-8 parts of kaolin powder, 2-2.5 parts of nanometer SiO2 powder and a binding agent of which the weight is 0.5-1 percent of the total weight of the components. The finished product prepared according to the prescription contains nanometer composite cordierite-mullite common crystal phase components; the problem of poor thermal shock resistance and short service life of the heat-insulating fireproof brick can be effectively solved; the finished product is good in thermal shock resistance, stable in high temperature resistance, resistant to high-temperature creep, capable of effectively preventing drop of bricks and cracking during use, long in service life, high in production efficiency and capable of avoiding huge economic loss of an enterprise due to shutdown maintenance.

The invention discloses a black-increasing agent for a high-temperature infrared-radiation energy-saving coating. The black-increasing agent is prepared by the following raw materials in percentage by weight: 20-60% of MnO2, 10-20% of Fe2O3, 1-5% of Co2O3, 5-10% of CuO, 0-10% of Cr2O3, 0-10% of NiO, and 20-40% of emery powder. The invention also discloses a preparation method of the black-increasing agent for a high-temperature infrared-radiation energy-saving coating. The black-increasing agent provided by the invention has the advantages of wear resistance, high temperature resistance and stable radiance, and is mainly used for fireproof base materials such as alumina bricks and mullite and metal base materials for boiler water wall tubes. The prepared coating has high infrared emitting ability at the temperature below 1300 DEG C within a broadband of 2.5-16.7 mum, with the average value being 0.88-0.92. The service temperature reaches up to 1450 DEG C, the black-increasing agent is stable at high temperature, the service life is not less than three years, the process is simple, and the cost is low.

The invention relates to a coating fire-resistant mica tape and a processing method thereof. The coating fire-resistant mica tape comprises a mica core layer. An organic silicon resin adhesive layers are respectively arranged on the top and bottom end surfaces of the mica core layer. Glass fiber cloth is arranged on outer side of each organic silicon resin adhesive layer. A high temperature-resistant coating is arranged on the outer surface of the glass fiber cloth. According to the invention, the process of the processing method of the coating fire-resistant mica tape is simple and convenient, the processed coating fire-resistant mica tap has an excellent insulating property, the insulating property of a cable is improved greatly after usage of the coating fire-resistant mica tap, the integral fire-resistant insulating property is improved, and the fire-resistant and high temperature-resistant properties are more stable; in addition, the high temperature-resistant coating is added, the coating crusts rapidly in a flame, each material layer of the coating fire-resistant mica tape does not separate under the protection of the high temperature-resistant coating, the phenomena of falling off, rupturing, loosening and the like in the using process do not happen, the damage of flame jet to the mica layer is prevented effectively, and the coating fire-resistant mica tape is integrally enabled to has characteristics such as shock resistance and water resistance.

The invention belongs to the technical field of bioengineering and particularly relates to a strain capable of high yielding acid-resisting high-temperature alpha-amylase and application. The bacilluslicheniformis specifically is bacillus licheniformis YBG-90036 and has an accession number of CGMCC NO. 20672. Fermentation liquor for yielding the acid-resisting high-temperature alpha-amylase through liquid fermentation of the bacillus licheniformis mutagenic strain CGMCC NO. 20672 has the enzyme activity of 8.9U/mL to 9.2U/mL; after the yielded acid-resisting high-temperature alpha-amylase issubjected to heat preserving for 3h under the conditions that the pH is 4.0 and the temperature is 98 DEG C, the remaining enzyme activity is 98%; the optimal pH is 3.5-4.4; the optimal reaction temperature is 98 DEG C to 100 DEG C; and the acid-resisting high-temperature alpha-amylase has good high-temperature resistance and acid resistance and can be extensively applied to multiple industries such as starch processing, beer brewing, fermentation and spinning.

The invention relates to a high-temperature carbon fiber heating cloth which includes an insulating fiber woven belt formed through warp and weft weaving of insulating fibers. Carbon fibers which are arrayed in parallel are interspersed in the warp or weft direction of the insulating fiber woven belt. The two ends of the carbon fibers are connected with electrodes. The insulating fibers are high-temperature insulating fibers. Because of high-temperature resisting performance of the high-temperature insulating fibers, a higher temperature can be borne so that the carbon fiber heating cloth woven by the high-temperature insulating fibers is capable of reaching a higher temperature and thus it is ensured that the heating cloth has an excellent high-temperature performance. Therefore, besides daily heating and warming use fields such as daily used heating and warm keeping and the like, the heating cloth can also be applied to the field of industrial application which needs a higher temperature so that the application scope of the heating cloth is increased significantly.

The invention provides a white-light interference high-temperature measuring device, which comprises a sensor, a white-light light source, a spectrograph and a data processor, wherein the sensor comprises a collimation lens, a polarizer and a sapphire right-angle prism, and the sapphire right-angle prism is used as a temperature sensing component. Light emitted from the white-light light source passes through an incident optical fiber to enter the collimation lens, and then becomes parallel light; the parallel light is divided into o light and e light by the polarizer; the o light and the e light are further transmitted to the sapphire right-angle prism; the sapphire right-angle prism reflects the o light and the e light back; the o light and the e light which are reflected back pass through the polarizer again to be interfered to obtain interfered light; the interfered light passes through the collimation lens, then is converged at a receiving optical fiber, and enters the spectrograph; the spectrograph carries out stripe detection on the interfered light, and conveys the detected spectral interfered stripe data to the data processor; and the data processor processes the interfered stripe data conveyed from the spectrograph and calculates out a temperature. The high-temperature measuring device has the advantages of high temperature resistance, corrosion resistance, high measurement precision, convenience in mounting, low cost and wide application aspect.

The invention discloses an efficient low-noise reciprocating piston type refrigerator compressor. The efficient low-noise reciprocating piston type refrigerator compressor comprises an air suction valve slice, an exhaust valve slice and a valve plate, wherein the compressor operates back and forth in the manner that a motor drives a crankshaft and the crankshaft drives a piston, and a coating is arranged on the surface of either the air suction valve slice or the exhaust valve slice; or the surfaces of the air suction valve slice and the exhaust valve slice are respectively provided with a coating; the coatings are made of polytetrafluoroethylene or PEEK engineering plastics. In addition, the invention further relates to the manufacturing process of the refrigerator compressor. By means of the technical scheme, the noise of the valve slices of the compressor is largely lowered, fatigue strength is improved, the gas transmission coefficient of the compressor is increased, and therefore the refrigerating capacity is increased. The effect of eliminating the exhaust pulse of the compressor is good, and pressure loss is reduced, so that the gas transmission coefficient is increased. The noise of the compressor is lowered, the energy efficiency ratio of the compressor is improved, and the purposes of saving energy and protecting the environment are achieved.

The invention provides a white-light interference sapphire high-temperature sensor, which comprises a protecting sleeve, a collimation lens, a polarizer, a sapphire wafer and a reflector, wherein the collimation lens, the polarizer, the sapphire wafer and the reflector are positioned in the protecting sleeve and are sequentially arranged at intervals; the sapphire wafer and the reflector are positioned at the front end of the protecting sleeve; the sapphire wafer is used as a temperature sensing component; incident white light passes through the collimation lens to be collimated to become parallel light; the parallel light passes through the polarizer to be divided into o light and e light which pass through the sapphire wafer and are further reflected by the reflector; the o light and the e light which are reflected back pass through the sapphire wafer again and further pass through an analyzer to be interfered to obtain interfered light; and the interfered light passes through the collimation lens, and then is converged at a focal point of the collimation lens. The high-temperature sensor can be used in a corrosive environment at a temperature of 1800 DEG C, has the advantages of high temperature resistance, stable chemical performance and the like, is not influenced by water vapor and gas components in high-temperature gas, and has a wide application range; a high-temperature measuring head is a high-precision optical element; the measurement precision is high; the mounting is convenient; and the cost is low.

The invention discloses a process for preparing an inorganic nanometer silicon-based calcium silicate heat insulation product. The process comprises the following steps: a, preparation before manufacturing; b, grinding and mixing; c, hydration reaction; and d, forming. According to the invention, a nanoscale inorganic siliceous material, namely nanometer silicon is used as a reaction base materialand a calcium raw material are mixed and burdened according to a certain ratio; a certain proportion of aerogel is properly added into ingredients to serve as an additive; and the hydration reactionis conducted under high temperature and high pressure; and therefore, the calcium silicate heat insulation product with low density, small heat conductivity coefficient, corrosion resistance, high strength and stable high-temperature resistance is prepared. According to the calcium silicate heat insulation product, the requirement for long-term stable use of the product in heat insulation of a heat supply network pipeline can be met; the nanometer silicon has the characteristics of high purity, small particle size, uniform distribution, large surface area, high surface activity and low apparent density; and the prepared calcium silicate heat insulation product has the characteristic of low density due to the characteristic of low density of the nanometer silicon, and the preparation efficiency of the calcium silicate heat insulation product is improved due to the characteristic of high surface activity of the nanometer silicon.

The invention discloses high-temperature glue for a ceramic material and a preparation method and application of the high-temperature glue for the ceramic material, and the high-temperature glue for the ceramic material comprises the following components in parts by weight: 10-14 parts of large-particle-size silicon dioxide; 2-4 parts by weight of silicon dioxide with a small particle size; 26-30 parts by weight of aluminum oxide having a large particle size; 5-7 parts by weight of aluminum oxide with a medium particle size; 2.5-4.5 parts by weight of alumina having a small particle size; and the balance of sodium silicate. Wherein the particle size range of the large-particle-size silicon dioxide is 40-50 microns, and the particle size range of the small-particle-size silicon dioxide is 2.4-4.4 microns; the particle size range of the aluminum oxide with the large particle size is 33-43 microns, the particle size range of the aluminum oxide with the medium particle size is 8-12 microns, and the particle size range of the aluminum oxide with the small particle size is 5.5-7.5 microns. According to the technical scheme, the high-temperature glue for the ceramic material is stable in high-temperature resistance.

The invention relates to high-temperature-resistant synchronous motor magnetic steel and a preparation method thereof, the high-temperature-resistant synchronous motor magnetic steel comprises an alloy main body and an additive, the alloy main body comprises the following components: 28.5 to 35 wt% of PrNd, 0.17 to 0.23 wt% of Nb, 0.15 to 0.22 wt% of Ga, 0.12 to 0.24 wt% of Cu, 0.88 to 0.96 wt% of Co, 0.13 to 0.18 wt% of Zr, 0.75 to 1.22 wt% of Al, 0.91 to 0.97 t% of B and the balance of Fe, and the sum of the components is 100%; the additive is at least one of silicon nitride, aluminum nitride, aluminum oxide, aluminum dihydrogen phosphate and zirconium nitride; and the additive accounts for 0.3-0.65% of the total mass of the alloy main body. According to the technical scheme, the manufactured secondary steel has good magnetic performance and high temperature resistance.

The invention relates to the technical field of adhesive tapes, particularly to a high-temperature-resistant masking tape and a preparation method thereof. The masking tape comprises a masking tape substrate and a glue layer coating the surface of the masking tape substrate. The glue layer is prepared from the following raw materials in parts by weight: 90 to 110 parts of natural rubber, 75 to 85parts of petroleum resin, 15 to 30 parts of vulcanized resin, 13 to 17 parts of an inorganic filler, 0.8 to 1.2 parts of an antioxidant, 300 to 330 parts of methylbenzene and 0.2 to 0.5 part of a thiuram accelerant. The prepared high-temperature-resistant masking tape has more stable viscosity and high-temperature resistance, so high-temperature drying at 170-180 DEG C can be conducted, a production speed can reach 50 m/min, and the production efficiency of the masking tape is greatly improved.