86results about How to "Smaller specific heat" patented technology

The invention provides a method for improving temperature gradient in a high-temperature tension sample of a heat expansion phase change instrument. The method is characterized in that one of following methods is improved in the tension test process: a clamp is prepared from austenitic stainless steel to replace the existing clamp to test; or, a U-shaped heat isolation sleeve and a fixed screw heat isolation ring are arranged at the contact part of the sample clamping end and the clamp to completely isolate the clamp, the fixed screw and the tension sample through the U-shaped heat insulation sleeve and the fixed screw heat isolation ring, and the clamp is prepared from austenitic stainless steel to replace the existing clamp to test. The method has the advantages that the austenitic stainless steel is used as the clamp preparation material and the ceramic fiber sheet is used as the heat isolation sleeve and the heat isolation sleeve, so that the heat radiation and heat conduction of high-temperature objects and low-temperature objects are effectively inhibited; the operation is easy, the detachment and installation of the sample are convenient, and the material stability is guaranteed.

The invention belongs to the technical field of preparation processes of ceramics and specifically relates to a production process of zirconia ceramics. The raw materials comprise 65-70mol% of zirconia, 10-13mol% of magnesium oxide, 0.5-0.7mol% of calcium oxide, 2.5-3mol% of yttrium oxide and 16-18mol% of cerium oxide. The production process comprises the following steps: weighing a certain quantity of the raw materials according to the mixture ratio, drying, calcining, granulating, performing static pressing and sintering to obtain products, namely zirconia ceramics. The produced zirconia ceramics have the advantages of high refractoriness, small specific heat and heat conduction coefficient, effect of being used as ideal high-temperature insulation materials, good chemical stability, acid resistance and resistance to corrosion of neutral substances at high temperature, and relatively high hardness and wear resistance, and can be widely applied to the field of biomedical appliances and the field of cutters and tools.

The invention discloses a testing system for internal temperature distribution in the process of fusion cast forming of explosives. The testing system is formed by an optical fiber Bragg grating sensor array, a signal detecting and demodulating device, a service and monitoring device and an explosive fusion casting device. The optical fiber Bragg grating sensor array is formed by optical fibers in an S-shaped arrangement mode, wherein a plurality of grating sensors are arranged on the optical fibers, and the optical fiber Bragg grating sensor array is fixed on one half of the central axis surface in the explosive fusion casting device. The grating sensors are arranged at intervals and distributed in an array mode. The signal detecting and demodulating device is located outside the explosive fusion casting device and is connected with the optical fibers. The service and monitoring device is in circuit connection with the signal detecting and demodulating device. The testing system effectively shelters the elasto-optical effect of Bragg grating to a thermal stress response, and can carry out sensing and measuring on temperature signals singly so as to carry out continuous multipoint monitoring on the change conditions of an internal temperature field in the process of fusion cast of the explosives.

The invention discloses a waterproof plastering gypsum, and belongs to the technical field of plastering gypsums. The plastering gypsum comprises the following raw materials in parts by weight: 60-70 parts of desulphurization gypsum, 25-30 parts of silica sand, 14-18 parts of calcium carbonate, 13-15 parts of cement, 8-10 parts of polytrimethylene terephthalate fiber, 10-12 parts of ceramic fiber, 7-9 parts of modified magnesium hydroxide, 6-8 parts of kieselguhr, 5-7 parts of starch, 1-3 parts of hydroxy propyl methyl cellulose, 3-5 parts of an organosilicone water repellent, 1-2 parts of a retarder, 2-4 parts of an antibacterial agent, 14-16 parts of an acrylic emulsion and 5-15 parts of water. The invention further discloses a preparation method of the waterproof plastering gypsum, the preparation is simple, and the waterproof plastering gypsum has excellent waterproof, fireproof and high temperature resistant capabilities after being solidified.

The invention discloses water-repellent oil-repellent superfine fiber synthetic leather and a preparation method thereof. The preparation method comprises the following steps of: (1) coating a chemical substance containing a water-repellent oil-repellent group on the surface of the superfine fiber synthetic leather; and (2) drying the product obtained in the step (1) through plasma gas, thus obtaining the water-repellent oil-repellent antifouling polyurethane superfine fiber synthetic leather. The prepared superfine fiber synthetic leather has excellent water-repellent oil-repellent effects and the characteristic of washing resistance. In addition, the preparation method has the advantages of low energy consumption and simple process.

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 invention discloses a vulnerable part of a welding gun and a surface treatment method of the vulnerable part. The vulnerable part of the welding gun is of a hollow structure and comprises an outer surface and an inner surface. A metal oxide coating is arranged on the outer surface. Metal oxide powder of the metal oxide coating includes 89%-91% of zirconium dioxide powder and 9%-11% of aluminum oxide powder. According to the vulnerable part of the welding gun and the surface treatment method of the vulnerable part, metal oxide powder is sprayed onto the surface of the vulnerable part of the welding gun, zirconium dioxide is high in fire-resistant temperature, small in specific heat coefficient and heat conductivity coefficient, good in comprehensive mechanical property and high in chemical stability, the abrasion resistance of the coating can be improved through aluminum oxide, and the thermal shock resistance is improved; in this way, the surface materials of the vulnerable part can be changed, the coating has a good heat dissipation effect, the temperature of a workpiece can be decreased, the durability and fire resistance of the high-temperature part are remarkably improved, the probability of slag hanging of the workpiece is greatly lowered, and the problem that an airflow path is blocked or wire feeding cannot be achieved due to the fact that the workpiece is burn down or slag hanging occurs is solved.

The invention relates to an insulating material for bus, which comprises the following components by weight: 65-85 parts of bisphenol A-type epoxy resin, 0.06-0.11 part of nanometer organic montmorillonite, 15-35 parts of a curing agent, 280-380 parts of SiO2 micro powder, 0.01-0.05 part of ZnO micro powder, and 0.05-0.15 part of BaTiO3 micro powder. The insulating material of the invention can operate under awful weather conditions, is widely applicable to power plants, power stations, transformer substations, photovoltaic power stations, wind power generation transformer substations, is an important accessory for power transmission equipment, is an important material for processing high voltage electric power matching insulating parts, and has good insulating properties and water resistance. The invention also provides a preparation method of the insulating material.

The invention discloses a preparation method for a friction plate. Materials of the friction plate comprise an enhanced titanium alloy skeleton and filler. The enhanced type titanium alloy skeleton comprises titanium alloy powder, tungsten carbide and titanium hydride. The filler comprises graphene fiber, diatomite, brass powder, graphite, carbon fibers, silicon dioxide, Pbo fiber, adhesive spraying aluminum silicate fiber, nanometer phenolic resin, styrene butadiene rubber, aramid fiber, mineral fiber, copper fiber, polypropylene fiber, paper fiber, metallic aluminum powder, zinc powder, mica, calcined petroleum coke, red vermiculite, light magnesium oxide, precipitated barium sulfate, light calcium carbonate, modified phenolic resin, molybdenum powder, molybdenum disulfide, graphite, nitrile butadiene rubber, ferric oxide, chromium oxide and the like; and the four technological processes of burdening, mixing and stirring, hot pressing forming and curing are adopted to complete the preparation method for the friction plate. The friction plate prepared through the scheme is low in hardness, high in stability, low in noise generated when an automobile is used and good in safety performance.

The invention discloses a low-temperature air foam drilling device and method. On the basis of a conventional air foam drilling process, foam liquid, air and air foam are refrigerated through a refrigeration system to form low-temperature air foam for drilling. The low-temperature air foam drilling device and method are suitable for drilling of a frozen soil stratum and a land natural gas hydrate layer. A low-temperature air foam drilling system comprises an air foam drilling system and the refrigeration system, wherein the refrigeration system comprises a foam liquid refrigeration system, an air refrigeration system and an air foam refrigeration system. Independent refrigeration and simultaneous refrigeration of the foam liquid, air and air foam are achieved, and refrigeration efficiency is improved. The low-temperature air foam drilling device and method can reduce the power required by the refrigeration system, reduces the influence on stratum temperature in the drilling process and is especially used in water-deficient areas and capable of reduce water consumption.

The invention provides a device for eliminating a white smoke plume from a chimney. An outlet of a desulfurization tower is provided with a flue gas cooling system and a flue gas heating system in sequence; heat of desulfurized smoke is absorbed by the flue gas cooling system, and transferred to a secondary air pipeline and a primary air pipeline; and the heat of high-temperature flue gas before desulfurization is absorbed by the flue gas heating system, and transferred to the flue gas cooling system for heating cooled flue gas. According to the device, the flue gas is cooled firstly, and condensation water is participated; the specific heat of wet flue gas is reduced, and then the required heat for heating the flue gas is reduced; thus, the white smoke plume is eliminated effectively; meanwhile, the energy consumption is reduced; and the flexibility is high, and the device saves energy and is environmentally friendly.

The invention relates to a temperature testing device, in particular to a gas thermometer, which has a wide measuring range and can measure the temperature of an object in a high-precision and high-speed manner. The gas thermometer comprises a temperature measuring part and a temperature indicating part, wherein a gas storage ball is arranged on the temperature measuring part; the gas storage ball is connected with a gas-guide tube; an elastic force application device is arranged on the gas-guide tube; the top end of the elastic force application device is wrapped with an interlayer thin skin; an elastic force application object is arranged inside the interlayer thin skin; the temperature indicating part comprises a dial scale, a fixed tray and a rotating bar; the rotating bar is connected with the gas storage ball; a laser is installed on the rotating bar; the rotating bar is connected with the interlayer thin skin through a magnetic sheet; and a fixed rotation point is arranged at the tail end of the rotating bar. The temperature testing device can measure the temperature of the object in a high-speed and high-precision manner.

The invention belongs to the field of road construction and particularly relates to a construction method for an antifreeze road body. The construction method comprises the following steps that 1, power-on test is conducted on heating cables to be laid before the heating cables to be laid enter a field, whether the heating cables work normally is detected, and the road face base layer is leveled and cleaned; 2, a damp-proof layer is laid; 3, a heat insulation layer and a reflection layer are laid; 4, a heat dissipation layer is laid; 5, a heating cable layer is laid; 6, a temperature sensing probe is arranged; 7, a road face cushion layer is laid; and 8, a road surface layer is laid. The problem of road face freezing is solved thoroughly, the road face is heated before the road face freezes, the performance of the road body is improved while it is ensured that the road face does not freeze, and the situation that the road face freezes to affect the performance of the road body and shorten the service life of the road body is prevented. The service life of the road body can be prolonged through the design of the road body, and safety of the road face is improved.

The invention provides a heat radiation protection device and a spectrum therapy instrument. The spectrum therapy instrument comprises a plurality of light sources and a heat radiation protection device. The heat radiation protection device comprises an area light source substrate, heat radiation bases, heat radiation fans, heat conduction pipes and heat radiation fins. The multiple heat radiationbases are arranged on the area light source substrate. Second installation parts are respectively arranged between adjacent heat radiation bases. The heat radiation fans are installed in the second installation parts respectively. The adjacent heat radiation bases are connected by the heat conduction pipes. The heat radiation fins are arranged on the pipe bodies of the heat conduction pipes to increase the heat radiation area. By integrating the heat radiation bases, the heat conduction pipes, heat conduction fluid, the heat radiation fins and the heat radiation fans and quickly transferringthe heat generated by the light sources to the heat radiation fin group through the heat conduction pipe network, multiple heat radiation and intelligent temperature control are realized. A fast and efficient heat radiation cycle system is formed, which is more efficient, intelligent and environment-friendly than air cooling. The heat radiation protection device is small, simple and easy to operate, can meet the requirement of light sources for long-time work and guarantee the working life of light sources, can radiate heat quickly, has high efficiency, and is convenient to install and use.

The invention discloses a low-temperature internal recycling steam engine and aims to provide a low-temperature internal recycling steam engine which is low in energy consumption, has no discharge and is delicate in structure. The structure of the steam engine is that a steam supply system is divided into a vaporizing cavity and a cooling cavity. A piston is pushed under the action of the materials with low boiling point, such as diethyl ether or aldehyde and the like, instead of water vapor. The diethyl ether or the aldehyde is internally recycled through a liquid pressing device between the vaporizing cavity and the cooling cavity. The steam engine of the invention is energy-saving, has no discharge, overcomes the shortcomings of complex structure and big volume of the steam engine, and is fit for being applied widely.

The invention belongs to the technical field of sewage processing, and provides an environment-friendly thermal insulation material, which comprises the following raw materials in parts by weight: 10 to 20 parts of carbon black, 10 to 13 parts of organic siloxane polymer, 2 to 6 parts of wetting agent, 3 to 7 parts of water retaining agent, 1 to 4 parts of silicone oil, 5 to 15 parts of vermiculite, and 10 to 15 parts of flint clay. When the provided thermal insulation material is filled in the lining of a high temperature furnace, the dust is reduced, the environment pollution is reduced, and the harm to the human body is reduced. When the provided thermal insulation material is taken as the lining of a high temperature furnace, the thermal insulation material can be easily compacted, is resistant to shrinkage, and generates a good effect.

The invention relates to a conveying manipulator and a handling device used for carrying a large area baseplate. The conveying manipulator comprises a load-bearing arm and a heat protection shell positioned on the surface of the load-bearing arm, wherein the thickness range of the heat protection shell is 0.001mm-0.3mm; and preferably, the surface of the load-bearing arm or a surface at which the heat protection shell is contacted with the load-bearing arm is provided with one or more protruding parts. The invention also provides the handling device which comprises the conveying manipulator. The conveying manipulator provided by the invention adopts the heat protection shell, the conveying manipulator still can exactly operate under a hot environment, even if the conveying manipulator is positioned in the hot environment for a long time, and the conveying manipulator can not transform; and in addition, the thickness of the heat protection shell is 0.001mm-0.3mm, further the weight of the conveying manipulator is reduced, the volume of the conveying manipulator is reduced, and the conveying cost is reduced.

The invention discloses a greenhouse breeding water and air parallelly heated solar energy-heat pump united heat supply system which comprises a solar water heating system, a soil heat storage and release system and a controller and further comprises a solar energy-heat pump air direct heating system and a new breeding water heating system. The solar energy-heat pump air direct heating system comprises a solar air heat collector group, a first heat pump and a fan. The new breeding water heating system consists of two portions, wherein the first portion comprises a sixth water pump, a waste heat exchanger, a sixth magnetic valve, a breeding water heat exchanger, a fifth magnetic valve, a breeding water preparation pond and a breeding pond. The soil heat storage and release system comprises a solar hot water heat collector group and a soil storage and release device. The greenhouse breeding water and air parallelly heated solar energy-heat pump united heat supply system changes an air and new breeding water heating mode in a breeding room, can decrease heat exchange middle links and is higher in heat transfer efficiency and better in energy-saving effect.