106results about How to "Stable performance at high temperature" patented technology

The invention relates to a potassium carbonate polyamine drilling fluid used for the petroleum drilling process. The potassium carbonate polyamine drilling fluid mainly comprises 1-60 percent of potassium carbonate, 0.5-25 percent of calcium oxide, 0.5-5 percent of polyamine shale inhibiting agent, 0-5 percent of bentonite, 0.5-3 percent of filter reducer, 0.1-0.5 percent of coating agent, 0.1-0.8 percent of tackifier, 0.5-5 percent of plugging agent, 0.1-2 percent of lubricating agent and a proper amount of weighing agent (added according to the requirement). The potassium carbonate polyamine drilling fluid can provide K+ with high concentration and has strong inhibiting capability on shale; the potassium carbonate and the calcium oxide react in equal mole ratio to generate micrometer and nanometer calcium carbonate superfine powder, thus CO32-anions generated by dissolving the potassium carbonate can be removed, the mineralization can be reduced and the influence of high mineralization on the action efficiency of other processing agents can be eliminated; and by matching, the calcium carbonate superfine powder can be deformed into asphalt and paraffin particles which can be usedfor plugging a microcrack shale stratum.

The invention relates to high-temperature heat storage device utilizing concrete and its heat storing method. Its heat exchange pipeline is buried in concrete heat storage block, heat exchange fin is at external wall of the pipe, a valve is mounted at cold fluid inlet, cold fluid outlet is at the other end of cold fluid tank; a valve is mounted at heat fluid inlet, heat fluid outlet is at the other end of heat fluid tank. Heat exchange is carried out utilizing the difference of temperature between the concrete heat storage block and the heat exchange pipeline.

A disclosed method for preparing high-thermal-conductivity high-strength silicon nitride ceramic comprises: uniformly mixing alpha-Si3N4 powder and a sinter aid according to a ratio, and then successively performing dry-pressing forming and isostatic pressing processing, so as to prepare a blank, wherein the sintering aid is a mixture employing Yb2O3 as a main sintering aid and employing at least one of Y2O3, Lu2O3, Nd2O3, Er2O3 and MgO as an auxiliary sintering aid; and embedding the prepared blank in Si3N4 powder, and performing gas pressure sintering at 1650-1850 DEG C in inert atmosphere, and then cooling to room temperature along with a furnace. The silicon nitride ceramic material prepared by using the method has high thermal conductivity and high strength, and is capable of satisfying application requirements of silicon nitride ceramic to fields such as high-speed circuits and large-power devices. The preparation method is simple in technology and low in cost, is suitable of large-scale production, and has practical value.

The invention relates to calcium oxide foam ceramic and a preparation method thereof. The preparation method thereof is technically characterized by comprising the following steps of mixing 90 to 99.5wt% of calcium hydroxide powder and 0.5 to 10wt% of other hydroxides, so as to obtain mixed powder; adding 0.1 to 3wt% of additive and 30 to 100wt% of water into the mixed powder, and mixing in a wet way, so as to obtain slurry; soaking a polyurethane sponge into the slurry for 2 to 20min, fetching out the polyurethane sponge containing the slurry, and extruding; drying the extruded polyurethane sponge at the temperature of 110 DEG C for 12 to 24h, so as to obtain a prefabricated block of the calcium oxide foam ceramic; finally, putting the prefabricated block of the calcium oxide foam ceramic into a heating furnace, heating to 1400 to 1700 DEG C, insulating heat for 1 to 5h, and naturally cooling, so as to obtain the calcium oxide foam ceramic. The calcium oxide foam ceramic has the advantages that the technology is simple, the cost is low, and the energy consumption is low; the prepared calcium oxide foam ceramic has high use temperature, stable high temperature property and good anti-hydration property, and is suitable for using as a high-temperature material for smelting high-purity melts.

The invention discloses an infrared electric heating film heating device with a double-film layer structure, which structurally comprises an electric heating film substrate and electrodes arranged on the two ends of the electric heating film substrate, wherein an electric conduction film layer and an infrared high emission film layer are sequentially evaporated on the surface of the electric heating film substrate. A preparation method of the infrared electric heating film heating device comprises the steps of: sequentially evaporating the electric conduction film layer and the infrared high emission film layer to the electric heating film substrate by using a high-temperature evaporation furnace, wherein an electric heating film solution comprises the components in parts by weight: 45-58 parts of stannic chloride, 0.3-2.0 parts of antimony butter, 0.4-1.2 parts of nickel trichloride, 0.3-1.0 part of indium chloride, 5-15 parts of ethanol/glycerol, 6-17 parts of inorganic acid, and 20-30 parts of deionized water, and an infrared high emission film solution comprises the components in parts by weight: 35-45 parts of manganous chloride, 15-20 parts of nickel dichloride, 5-10 parts of chromium trichloride, 5-15 parts of ethanol/glycerol and 20-30 parts of deionized water; and finally assembling the electrodes to obtain the infrared electric heating film heating device. In the invention, the double-film layer structure is adopted for the infrared electric heating film heating device, which can greatly enhance radiative heat transfer, reduce convection heat transfer, improve energy efficiency and save energy sources.

The invention aims at providing a tunnel bituminous pavement light color functional layer based on a light color cement material. The functional layer is characterized by comprising the light color cement material and a broken stone material, wherein the light color cement material is formed by mixing a component A and a component B in a mass ratio of 1:1, wherein the component A and the component B have specific compositions. The tunnel bituminous pavement light color functional layer based on the light color cement material has excellent track-resisting capacity and water damage resisting capacity; and the drawing and bonding strength of the light color cement material is obviously improved, the adhesion between the light color cement material and the stone material is improved further, so that the functional layer has more excellent structural integrity and road surface functionality.

The invention provides an optical glass rod material drawing device and belongs to the technical field of secondary forming of optical glass. The problem of low master rod material utilization rate caused by secondary rod material surface defects at present is mainly solved. The optical glass rod material drawing device is mainly characterized by comprising a softening crucible, a viscosity adjusting crucible and a rod material forming mold which are connected from top to bottom to form a whole. Heating rods are arranged in a heat-preserving furnace body outside the softening crucible, the viscosity adjusting crucible and the rod material forming mold. A rod material traction device is arranged below the rod material forming mold. The rod material forming mold is smaller than the softening crucible in cavity cross section area. The surfaces of the inner cavities of the softening crucible, the viscosity adjusting crucible and the rod material forming mold are continuously smooth. A charging port is formed in the top of the softening crucible. The optical glass rod material drawing device has the advantages that glass master rod materials which have forming defects on the surfaces or are not suitable for direct secondary rod material production can be directly drawn into required sub-rod materials and the product yield is improved, and is mainly used for secondary draw-forming of optical glass rod materials.

The invention belongs to the technical field of ceramic materials and discloses superhigh-temperature SiC-HfB2 composite ceramic and a preparation method and application thereof. The superhigh-temperature SiC-HfB2 composite ceramic is prepared by: adding a solvent and a ball milling medium into SiC powder, HfO2 powder, Ta2O5 powder and amorphous boron powder, mixing, drying to obtain mixed powder,die-pressing the mixed powder to obtain a mixed powder blank, thermally treating in vacuum, heating to 900-1300 DEG C, carrying out temperature holding I, heating to 1500-1800 DEG C, carrying out temperature holding II, thermally treating in vacuum to obtain SiC-HfB2 powder, performing discharge plasma sintering to heat the SiC-HfB2 powder to 1000-1400 DEG C, injecting a protective atmosphere, heating to 1800-2200 DEG C, and calcining. The superhigh-temperature SiC-HfB2 composite ceramic has good resistance to high temperature.

The invention relates to a titanium coated calcium oxide material and a preparation method thereof. The preparation method has the technical scheme that calcium hydroxide fine powder is used as raw materials; water accounting for 0.2 to 4 weight percent of raw materials is externally added; mixing, formation and drying are performed to obtain a calcium hydroxide blank body; then, the blank body isput into a container; pressure maintaining is performed for 4 to 6 minutes under the condition of 1 to 2kPa; a titanic acid ester solution is injected into the container at uniform speed until the calcium hydroxide blank body is submersed; then, pressure maintaining is performed for 4 to 6 minutes under the condition of 1 to 2kPa; the container injected with the titanic acid ester solution is taken out; still standing is performed for 20 to 40 minutes in air; the calcium hydroxide blank body soaked in the titanic acid ester solution is taken out; still standing is performed for 20 to 24h. Finally, heat treatment is performed for 1 to 8h under the temperature of 1300 to 1700 DEG C; natural cooling is performed; the titanium coated calcium oxide material is prepared. The process is simple;the prepared titanium coated calcium oxide material has high use temperature, stable high-temperature performance and good anti-hydration performance; high-temperature melts can be purified; the titanium coated calcium oxide material is suitable for being used as a high-temperature material for high-purity melt smelting.

The invention relates to a dense granule magnesia-calcia material and a preparation method thereof. According to the technical scheme, lightly burnt dolomite is hydrated, filtered and dried and then magnesium-calcium hydroxide powder is obtained; the magnesium-calcium hydroxide powder and an additive are prepared in the mass ratio being 1:(0.002-0.05), subjected to wet grinding, filtered, dried and ground; the magnesium-calcium hydroxide mixture powder obtained through grinding is put into granulation equipment, water accounting for 8-30wt% of the magnesium-calcium hydroxide mixture powder is added under the condition of 1,000-3,000 rpm, and when granules are formed, the granulation equipment is adjusted to run at the speed of 500-1,000 rpm and is stopped after all the magnesium-calcium hydroxide mixture powder is made into magnesium-calcium hydroxide granules; the magnesium-calcium hydroxide granules are put into a heating furnace and kept at the temperature of 1,400-1,800 DEG C for 1-5 h, nitrogen or argon is introduced at the speed of 0.5-5 l/min until the temperature reaches 35-70 DEG C, and the dense granule magnesia-calcia material is obtained. According to the dense granule magnesia-calcia material, the process is simple, the cost is low and the energy consumption is low; the prepared dense granule magnesia-calcia material can be used at a high temperature and has stable high-temperature performance and good hydration resistance.

The invention discloses copper alloy and a manufacturing process thereof. The manufacturing process comprises the following steps of: preparing an intermediate copper alloy block and a rare-earth alloy block; adding the prepared intermediate copper alloy block into refined copper liquid in a tilting refining furnace, and homogenizing copper alloy; and adding the weighed rare-earth alloy block at the initial end of a sealing trough, and smelting to obtain the copper alloy. The copper alloy has the hightensile strength, high wear resistance and high corrosion resistance, has the stable high-temperature performance at high temperature, namely a high-temperature softening initial point is high, and has the high conductive performance.

The invention relates to a calcium oxide particle and a preparation method thereof. The preparation method comprises the following steps: mixing 20-95 wt% of limestone powder with 5-80 wt% of calciumoxide powder to obtain a mixed powder; adding the mixed powder and water accounting for 10-30% of the weight of the mixed powder into a material barrel for a granulating device, starting the granulating device, performing granulation at a rotating speed of a rotor of 500-2000 rpm, and taking out obtained particles after the mixed powder in the material barrel are completely converted into the particles; and adding the particles into a heating furnace, performing heat insulation at 1500-1800 DEG C for 1-5 h, and cooling the particles to prepare the calcium oxide particle. The particle size of the calcium oxide particle is 0.1-8 mm, and the content of CaO in the calcium oxide particle is equal to or more than 95 wt%. The preparation method has the advantages of simple process and low preparation cost, and the prepared calcium oxide particle has the characteristics of high use temperature, stable high temperature performances and good hydration resistance, and is an optically selected rawmaterial for calcium oxide ceramic, refractive materials and other high-grade materials.

The invention discloses a low-cost ramming material for RH and a preparation method thereof and belongs to the technical field of smelting refractory materials. The low-cost ramming material for RH comprises, by mass, 20-25% of a used waste refractory material with particle sizes of greater than 3mm and less than or equal to 5mm, 20-25% of a used waste refractory material with particle sizes of greater than 1mm and less than or equal to 3mm, 25-30% of a used waste refractory material with particle sizes of less than or equal to 1mm, 20-25% of magnesia, 2-5% of a binding agent and 0.1-0.5% of additives. After the ramming material is used, refractory material resources are reasonably applied, and environmental pollution caused by solid waste emission is reduced. The ramming material for RH has the characteristics of low cost, stable high-temperature performances and no new pollution.

The invention discloses a scrap aluminum regeneration type heat-resistant aluminum alloy and a preparation method of the scrap aluminum regeneration type heat-resistant aluminum alloy. The raw materials of the heat-resistant aluminum alloy comprise, by mass, 60.5%-63.0% of scrap aluminum profiles, 10.5%-11.0% of scrap aluminum castings, 7.0%-7.5% of scrap aluminum plates, 15.0%-16.0% of waste aluminum wires and 4.5%-5.5% of scrap copper wires. According to the scrap aluminum regeneration type heat-resistant aluminum alloy and the preparation method of the scrap aluminum regeneration type heat-resistant aluminum alloy, scrap aluminum is used as the raw material to be directly regenerated for production of the heat-resistant aluminum alloy, the use value of the scrap aluminum is improved, the production cost of the heat-resistant aluminum alloy is lowered, and the produced heat-resistant aluminum alloy has excellent indoor-temperature strength and high-temperature strength, can be applied to the automobile field, the rail transit field, the maritime work facility field, the aerospace field and the like and has broad application prospect.

The invention discloses a high-temperature and high-pressure rigidity seal hydrophobic ball valve, aiming to provides a ball valve resistant to high temperature and high pressure. According to the technical scheme, the high-temperature and high-pressure rigidity seal hydrophobic ball valve comprises a valve body, the valve body is internally provided with a sealing device, and the sealing device comprises the valve body and a channel in the valve body; a fixed valve seat is fixedly welded to the right side of the valve body, and the valve body is further internally provided with a valve ball which forms a main seal with the fixed valve seat; a moving valve seat is arranged on the other side of the channel, and the moving valve seat is further provided with a pressure spring attached to thevalve ball; an adjusting valve seat is further arranged at the end, away from the valve ball, of the pressure spring, and a spring retaining ring is further arranged on the side, away from the pressure spring, of the adjusting valve cover; and an inner hole step is further arranged at the top end of the moving valve seat, and a lip tip for inserting the inner hole step is arranged at one end of the adjusting valve cover.

The invention provides a high-performance asphalt pavement regenerant and a preparation method thereof. The high-performance asphalt pavement regenerant is prepared from, by weight, 60-70 parts of anactivating component, 5-10 parts of a permeating component, 10-15 parts of a plasticizing component, 8-15 parts of a modifying component and 3-6 parts of an anti-aging component, and the sum of the weight parts of the raw materials is 100 parts. According to the invention, the synergistic combination of thermal stability substances is used as an activating component to replace the traditional aromatic hydrocarbon oil activating component, so that the thermal stability of the regenerant can be greatly improved, and the long-term aging performance of the regenerated mixture can be improved. Theselected surfactant enables the asphaltene association structure to be deassociated, and dissolution and dispersion of asphaltene are promoted. The preparation process is simple, raw materials are wide in source, starting from the asphalt aging mechanism, activation and performance blending of aging components are considered, and the prepared regenerant is excellent in pavement performance and wide in application prospect.