34results about How to "Strong fracture toughness" patented technology

A graphite-enhanced ultrafine synthetic leather fiber is provided. Graphite nylon 6 master batch is prepared via a twin-screw extrusion way; the nylon 6 master material is added to nylon 6 granules via a metering device for sea-island melt spinning; and graphite-enhanced ultrafine fibers can be achieved after decrement and splitting. The graphite-enhanced ultrafine synthetic leather fiber is characterized by high breaking tenacity, static resistance, bacteria resistance, aging resistant and strong flexibility; ultrafine fiber synthetic leather quality and comprehensive performance can be improved when the graphite-enhanced ultrafine synthetic leather fiber is applied to synthetic leather industry; and traditional sea-island fiber spinning equipment can be employed for production.

The invention relates to a compact silicon nitride ceramic lift pipe and a preparation method thereof. The silicon nitride ceramic lift pipe is prepared from 85-95 parts of silicon nitride and 5-15 parts of a sintering aid. The sintering aid is selected from one or more of aluminum oxide, magnesium oxide, yttrium oxide, cerium oxide and titanium carbide. The silicon nitride ceramic lift pipe provided by the invention has the characteristics of high density, high hardness, high bending strength, and strong fracture toughness, etc., and has long service life, can be used continuously for more than one year on a conventional low pressure aluminum casting machine. Through comprehensive optimization of the raw material composition and the preparation method, the production problem of silicon nitride lift pipes in the aluminum casting industry is solved, the quality of key parts in the domestic aluminum casting industry is enhanced, the aluminum casting production efficiency is greatly improved, the production cost is reduced, the production efficiency is significantly improved, the production cost is reduced, thus being conducive to breaking through the monopoly position of foreign silicon nitride enterprises in the industry, and improving the global awareness of China's silicon nitride ceramic level.

The invention discloses a PE pipe production method. The method comprises A, putting PE resin powder, color master batches, a clay nanocomposite material, a flame retardant, nanometer calcium carbonate, a dispersant, an antistatic agent, a coupling agent, a low temperature-resistant plasticizer and an antioxidant into a drying mixer together, and carrying out drying stirring to obtain a raw material, B, adding the raw material into an extractor and carrying out melting extrusion granulation, and C, putting the granulated material into an extruder, carrying out melting and extruding the material through a die outlet. The product is prepared from the PE resin powder, color master batches, clay nanocomposite, flame retardant, nanometer calcium carbonate, dispersant, antistatic agent, coupling agent, low temperature-resistant plasticizer and antioxidant through mixing. The PE pipe has good static resistance, corrosion resistance, flame resistance, flexibility, low temperature resistance, high temperature resistance, good fast crack growth fracture toughness and good pressure resistance and guarantees the safety of the PE pipe in any environments.

The invention relates to the technical field of fluorescence temperature measurement, in particular to a fluorescence temperature measurement method suitable for an ultra-wide temperature measurement range. The fluorescence temperature measurement method comprises the following steps of: (a) establishing a standard curve of a fluorescence peak intensity ratio of Pr < 3 + >-based 3P1-to-3F2 transition and 3P0-to-3F2 transition of a fluorescence temperature sensing material along with temperature change; and (b) placing the fluorescence temperature sensing material in an environment of which the temperature is to be measured, measuring the fluorescence spectrum of the fluorescence temperature sensing material, calculating the fluorescence peak intensity ratio of Pr < 3 + >-based 3P1-to-3F2 transition and 3P0-to-3F2 transition, substituting the fluorescence peak intensity ratio into the standard curve, and calculating to obtain a temperature measurement value of the to-be-measured environment, the fluorescence temperature sensing material being Pr < 3 + >-doped oxide transparent ceramic, and the molar doping concentration of Pr < 3 + > being 0.1%-10%. According to the temperature measurement method, a higher temperature measurement limit and a wider temperature measurement range can be realized.

The invention discloses a novel shell-based concrete fish shelter, and belongs to the field of marine environment restoration device. A preparation process of the fish shelter comprises the steps of preparing coarse broken shells, preparing shell powder and preparing the concrete fish shelter; according to the preparation process, the concrete fish shelter is prepared by adopting the discarded shells to replace natural sand and partial cement as main materials, the resources are recycled, the environmental protection is facilitated, the prepared fish shelter is high in fracture toughness and stability and good in hydrodynamic performance, and the structure of the prepared fish shelter can improve the distribution of nutrients in seawater.

The invention relates to a mountain-climbing hook and a processing technology thereof. The mountain-climbing hook comprises a movable rod and a hook body with an articulation hole, wherein the outer peripheral surface of the hook body is encircled by an inner arc-shaped surface, an outer arc-shaped surface and two flat planes; the cross section abutting against the bottom of a gap and the cross section at the lower end of a mounting plate are intersected at a point A; when the movable rod is rotated, the upper end of the movable rod and the inner arc-shaped surface are intersected at a point B, the point A and the point B are connected to form a straight line Z, the shortest straight-line distance between a central point C of the cross section of the articulation hole and the outer arc-shaped surface is L3, and the shortest straight-line distance between the point C and the straight line Z is L4. The processing technology of the mountain-climbing hook is specifically as follows: smelting a well prepared alloy into an aluminum solution, degassing, refining, standing, skimming, and then casting into an aluminum alloy round cast bar; performing extrusion forming in a reverse direction; and performing heat treatment on a cast piece to obtain the mountain-climbing hook. The mountain-climbing hook provided by the invention has the advantages of relatively high tensile strength, corrosion resistance and fracture toughness, as well as long service life.

The invention relates to a PVC (polyvinyl chloride) silencing water drainage pipe and a production method thereof. The PVC silencing water drainage pipe is prepared from being prepared from the following raw materials in parts by weight: 80 to 100 parts of polyvinyl chloride resin, 100 to 130 parts of nano anhydrous calcium sulfate, 5 to 8 parts of a stabilizer, 2 to 5 parts of a modifier, 0.5 to2.0 parts of PE (polyethylene) wax, 0.5 to 2 parts of an aluminate coupling agent and 0.2 to 0.5 part of a compound antioxidant. The raw materials of the PVC silencing water drainage pipe are simple and easy to obtain, so that the PVC silencing water drainage pipe is low in cost, extremely high in aging resistance, flexibility, low-temperature resistance and high-temperature resistance; by the adding of a methyl methacrylate-butadiene-styrene copolymer, the PVC silencing water drainage pipe achieves a silencing effect; the low-temperature toughness and the impact resistance are improved; the PVC silencing water drainage pipe has a shock absorption function.

The invention discloses an aluminosilicate auxiliary deposition silver coating planting abutment ceramic material and a preparation method thereof to solve the problem in the prior art that a ceramicabutment is not subjected to antibacterial treatment. The preparation method comprises the steps of coating a layer of aluminosilicate on the surface of a zirconia ceramic sheet and baking to obtain asintered aluminosilicate coated ceramic sheet; immersing the sheet in a silver nitrate solution for ultrasonic water bath impregnation away from light; after the impregnation, taking out the aluminosilicate coated ceramic sheet and baking to reduce the silver nitrate impregnated on a coating of the aluminosilicate coated ceramic sheet in situ to obtain the aluminosilicate auxiliary deposition silver coating planting abutment ceramic material. The material has the advantages of being scientific in design and convenient to operate, has both aesthetics and antibacterial property, and can stablyexert the antibacterial action for a long period. The preparation method is simple, low in cost and high in safety.

The invention discloses a nodular cast iron section bar capable of improving the fracture toughness. The nodular cast iron section bar comprises, by mass, 3.45%-3.55% of carbon, 2.55%-2.65% of silicon, 0.15%-0.25% of manganese, 0.009%-0.011% of sulphur, 0.030%-0.034% of phosphorus, 0.009%-0.0011% of bismuth and the balance iron. Graphite nodules in the section bar structure are small, large in quantity and high in roundness, the round and small graphite nodules have the relaxation stress and have the effect of delaying crack propagation, and the effect of preventing cracks from being generatedis achieved. The invention further discloses a technology for the nodular cast iron section bar capable of improving the fracture toughness. The metal bismuth is added into iron liquid, therefore, the quantity of the graphite nodules is increased, the declination speed in the inoculation process is decreased, abnormal graphite generated in the quick cooling process is eliminated, and the roundness of the graphite nodules can be improved. Meanwhile, size grading of the graphite nodules is improved, the plasticity of the nodular cast iron is obviously improved on the condition that the strengthof the nodular cast iron is invariable, and then the nodular cast iron has the good fracture toughness.

The invention relates to an MEMS (Micro-Electro-Mechanical-System) device and a manufacturing method thereof so as to improve the reliability of a cantilever beam of the existing MEMS device, and relates to an MEMS temperature sensor and a manufacturing method thereof so as to improve the process and structure of the existing MEMS temperature sensor. For the MEMS device, a zigzag structure is additionally arranged at a connecting part of a movable portion and a fixed portion of the cantilever beam, and the connecting part is reinforced so as to avoid the connecting part from being broken. For the MEMS temperature sensor, the lower surface or the upper surface of the movable portion of the cantilever beam is provided with a strain gauge with the thermal expansion coefficient being different from that of the movable portion of the cantilever beam, so that the movable portion of the cantilever beam is warped and deformed in the measuring process because the thermal expansion coefficient is different from that of the strain gauge, capacitance between the movable portion of the cantilever beam and a fixed electrode changes, and thus the temperature is detected.

The invention provides a PPR water supply pipe tubular product which comprises the following raw materials: polypropylene resin powder, a polypropylene random copolymer, color master batch, a clay nano composite material, color masterbatch ash and an adjuvant, wherein the adjuvant comprises an antioxidant and crosslinked high density propylene; the color masterbatch ash comprises calcium carbonate and a talcum powder filler; the melt flow rate of the raw materials is 0.2-0.22 g/10 minutes, the melt density is 0.8-0.96 g/cm3, the oxidation induction time is 110-130 minutes, the tensile strength is 35MPa, and the fracture depth rate is 600%. The PPR water supply pipe tubular product provided by the invention has good anti-pressure ability, flexibility, low-temperature resistance, high-temperature resistance and strong rapid crack propagation breaking tenacity, and the PPR water supply pipe tubular product is better in pressure resistance as a result of the added color masterbatch ash and the clay nano composite material.

The invention provides a production method for a PVC-U drainage pipe. The method comprises the following steps: step 1, adding raw materials into a mixer and carrying out stirring and drying so as to form a mixture; step 2, adding the mixture into an extractor and carrying out melting, extruding and granulating; and step 3, adding an obtained granulated material into an extruder, then carrying out melting and die extrusion, and carrying out spray cooling through a cooling water tank so as to obtain the PVC-U drainage pipe, wherein a principle in the step 1 is as follows: a weight of an aluminum-free stabilizer accounts for 4% of the weight of the raw materials; the weight of chlorinated polyethylene accounts for 6% of the weight of the raw materials; the weight of titanium dioxide accounts for 1.4% of the weight of the raw materials; the weight of paraffin accounts for 0.2% of the weight of the raw materials; and the weight of stearin accounts for 0.2% of the weight of the raw materials; and a clay nanometer composite material is a layered silicate nanometer material. The PVC-U drainage pipe provided by the invention has ageing resistance, flexibility, low-temperature resistance, high-temperature resistance, rapid crack propagation and strong fracture toughness.

The invention discloses a sintering method of low-Co WC. The sintering method comprises steps as follows: step 1, nano-WC powder, TiB2 and Co powder are subjected to ball mill mixing uniformly and are dried, mixed powder is obtained, wherein the content of TiB2 is 0.1w%-0.7w%, and the content of Co powder is 0.2w%-0.8w%; step 2, the mixed powder is put in a graphite die and compacted, then the mixed powder and the die are both put between an upper electrode and a lower electrode of an SPS (spark plasma sintering) device, subjected to vacuum pumping, powered-on, heated at a speed of 200 DEG C/min and pressurized, a product is subjected to heat preservation for 5-10 min after sintering temperature reaches 1,500-1,700 DEG C and axial pressure reaches 50 MPa, and a sample is taken out after power-off cooling; step 3, the product out of the furnace is polished and cleaned, and a finished product is obtained. Co is added during sintering of WC, so that fracture toughness of a hard alloy can be enhanced; then TiB2 is added, the hardness of the hard alloy is not affected by Co by the aid of the characteristic of high hardness of TiB2, and TiB2 can also change electrical conductivity of the powder and change sintering performance; under the synergy with the SPS technology, the sintering effect is better, crystalline grains cannot grow up, and the density and the hardness are higher.

The invention relates to an application method of a ceramic nano material for preventing ring formation in a rotary cement kiln. The application method is characterized in that the ceramic nano material is an RSI-X-HT 700-1910 high temperature nano ceramic material, and the application method comprises the following concrete steps: checking and confirming positions of crust and formed rings before construction, soaking a nano ceramic coating material and hydrating, cleaning the surface of a to-be-sprayed part, carrying out nano ceramic spraying operation, maintaining, checking and accepting. The application method has the beneficial effects that the RSI-X-HT 700-1910 high temperature nano ceramic material is adopted for preheating and decomposing a transitional zone, at which ring formation and crust attachment can be easily caused, of a cement kiln, the difficult problem that the ring formation and crust attachment can be easily caused in the traditional zone cannot be solved after a preheating and decomposing kiln appears is solved, and inferior coal can be better used and garbage can be better burned without producing great influence on a kiln system, so that yield and quality of the kiln system are stable, and the application method has broad prospect and is worthy of popularization.