317results about How to "Solve the cracking problem" patented technology

The invention relates to a lightweight energy-saving insulating concrete, belonging to building materials. The invention comprises the master batches and accessories in accordance with the following parts by weight: master batches: 30-70 parts of cementing materials, 25-60 parts of fillers, 5-10 parts of strength activators, and accessories: 1-3 parts of waterproof agents, 2.0-3.0 parts of bleeding agents, 2.0-5.0 parts of suspending agents, 0.1-0.5 part of foam stabilizer, 38-60 parts of honeycomb agents, 0.5-1.5 parts of rusty retardant agents, 0.02-10 parts of reinforcing agents, 1.2-4.2 parts of early strength agents and expanding agents and 0.6-1.4 parts of acid and alkali resistant fibers. The concrete has the advantages of high early tensile and compressive strength, no decrease and crack of later strength and simple manufacturing process. According to the requirement of the building structure, the technical target of the concrete can be realized by regulating the mixing proportion. The concrete can be used for manufacturing various products at normal temperature and is widely applied to insulating and self-waterproof building engineering.

The invention discloses a method for preparing a porous alumina ceramic support body by using a colloidal sol as an addition agent, which comprises the following steps: adopting a low cost method to prepare the colloidal sol; adding the colloidal sol into mixed dry powder on the basis of aluminum oxide aggregate; and performing the processes of pugging, molding, sintering and the like to obtain a multi-channel pipe type or honeycomb type porous alumina ceramic support body. The method uses the colloidal sol as a caking agent, a sintering addition agent, and a performance improver, and makes use of the caking property of the colloidal sol, thus the dosage of organic caking agent can be reduced remarkably to solve the problem of easy cracking of binder removal sintering; and with the fine particles of the colloidal sol as the sintering addition agent, the sintering temperature can be reduced, and the dissolvability of the particles are improved, thus the sintered product does not have glass phase through microscopic analysis. The prior preparation method adopting low melting point glass phase as the sintering addition agent is improved, and the acid resistance, the alkali resistance and the high temperature strength of the porous alumina ceramic support body are improved.

The invention discloses a PC/ABS alloy with excellent chemical resistance. The PC/ABS alloy mainly comprises the components with the weight portions as follows: 30-70 portions of PC, 10-30 portions of ABS, 20-30 portions of SAN, 0-5 portions of toughener and 3-7 portions of PBT. The preparation method comprises the steps as follows: the raw materials are weighed according to the weight proportion; all raw materials are put into a high-speed mixer to be mixed for 2 to 5 minutes; then the mixed raw material is arranged in a double-screw extruder to be extruded and granulated; the rotating speed of the double-screw extruder is 180-600 revolution/minute and the temperature is 180-260 DEG C. In the PC/ABS provided by the invention, PBT and crylic acid toughener are utilized to modify the PC/ABS, thereby being favorable for improving the solvent resistance of the PC/ABS alloy, wherein, the solvent resistance is improved to a great extent after the PBT is added, and the physical property of the PC/ABS is improved at the same time.

The invention discloses a preparation method of super-double micro-nanometer film on metal surface, and relates to the treatment method of metal surface. The processes of the method are: prepare nanometer TiO2 film on the metal surface; carry out micro-nanometer treatment on the TiO2 film. The technique is simple and the feasibility is strong. The micro-nanometer treatment can maintain the thickness of the film and diminish the craze of the nanometer film. The invention only needs changing the temperature and the time to prepare the surface films with different shapes, and is not influenced by the kind, the shape and the size of the basic body. The surface F silicon alkyl treatment can prepare super-double nanometer TiO2 film and the erosion resistance is advanced by three quantity grades.

An anticrossion treating process for the metal surface includes such steps as preparing ultrafine (nano-class) TiO2 sol by adding EAcAC and tetrabutyl titanate to alcohol and dropping water, preparing a decorative nano TiO2 film layer on the metal surface by pull method, hydrothermal treating, and fluorosilalkylating to obtain a hydrophobic film. Its advantages are high anticorrosion effect and easy control.

The invention relates to a loess tunnel construction method, which can lower the construction difficulty and ensure the construction safety and the structure stability. The method comprises the following steps: (1) rapidly excavating the tunnel; (2) immediately constructing a primary support; (3) erecting an invert trestle, and constructing a primary support invert in time to make the primary support form a closed integral body; (4) erecting an invert trestle, and carrying out invert backfilling and short wall construction as earlier as possible; and (5) constructing a secondary lining at a proper moment meeting the deformation rule of the loess tunnel.

The invention relates to a polyphenyl plate thinly plastered external insulation system of an outer wall, comprising a wall structure layer. The polyphenyl plate thinly plastered external insulation system of the outer wall is characterized in that the wall structure layer is sequentially provided with a heat insulation layer, a crack-resistant protection layer and a finishing coat outside the wall structure layer , wherein the insulation layer is formed by bonding slurry and flame-resistant type expansion polyphenyl plate; the crack-resistant protection layer is formed by crack-resistant mortar and glass fiber alkali-resistant grids; the finishing coat is outer wall flexible putty; tray rivets are arranged on the glass fiber alkali-resistant grids and connected with the wall structure layer; and the finishing coat is formed by crack-resistant mortar, flexible tile bonding agent and tile. The invention has the advantages of solving a the problems of cracking between the crack-resistant protection layer and the finishing coat, the stress concentration and the shrinkage distortion of the insulation layer and the crack-resistant protection layer, and the ageing resistance and durability of the crack-resistant protection layer and the finishing coat.

The invention discloses a temperature gradient controlled mass concrete for bridges. The mass concrete comprises an inner layer of low-temperature rise anti-crack concrete I, a middle layer of low-temperature rise anti-crack concrete II and an outer layer of high-tenacity high-crack resistance concrete from the inside to the outside. According to the mass concrete disclosed by the invention, under combination of the low-temperature rise anti-crack concrete (the inner layer of low-temperature rise anti-crack concrete I and the middle layer of low-temperature rise anti-crack concrete II) and the high-tenacity high-crack resistance concrete structure, hydration heat of cementing materials on various layers is respectively absorbed through the characteristics of a high phase-transition temperature of a composite temperature control material in the inner layer of low-temperature rise anti-crack concrete and a low phase-transition temperature of a composite temperature control material in the middle layer of low-temperature rise anti-crack concrete; the inside and the middle temperatures of the concrete are lowered; meanwhile, different thicknesses and layout forms of two concrete materials are optimized and designed; reduction of the temperature difference between the layers is achieved; the overall temperature stress level is reduced; the technical problem of crack of the mass concrete widely existing in bridge engineering can be effectively solved; and the temperature gradient controlled mass concrete for the bridges is applicable to popularization and application.

The invention provides an internal insulation house having integral spray painting rib concrete structure. The house is characterized in that the internal insulation house is assembled by a prefabricated insulation interior wall, a roof slab, a floor formwork, and an internal partition wall board, the heat insulation outer layer is formed by directly spray paining the concrete structure layer, and the wall, pole, beam, flow, and roof slab before directly spray painting the concrete are all permanent walls and need not to be dismounted. A reverse construction method is formed which firstly constructs the house internal decoration layer, the heat insulation layer, and fills the walls, and then constructs the main bearing components. The invention can save great amount of formworks, greatly short the construction period, reduce the engineering cost, has excellent aseismic effect, can also effectively solve the crack problem of the slurry protection layer outside the heat insulation layer, and is especially suitable for the building construction of single floor or multiple floor house.

The invention discloses a construction method for preventing vertical cracking between a main structure and a filled wall. After the construction of the main structure is finished, the construction of the filled wall is implemented; when the filled wall is constructed, the side surface of the filled wall in connection with the main structure is made into a zigzag structure; a tension rib in the filled wall penetrates a reserved combination column space to be connected with the main structure at the side surface; a combination column template is supported at the reserved combination column space, and plain concrete is poured and vibrated tightly to form a combination column; and the filled wall and the main structure are connected as a whole through the combination column. The plain concrete combination column is poured between the side surface of the filled wall and the main structure, and the combination column is connected with the main structure through the same material and engaged with the filled wall through the zigzag structure, therefore, the problem of cracking caused by insufficient engaging force between the main concrete structure and the filled wall and the shrinkage of the dissimilar materials of the wall is successfully solved; meanwhile, the combination column can effectively adjust the line snapping size and reduce the loss rate of the building blocks.

The invention provides water-soluble polyurethane and its preparation method, wherein, the water-soluble polyurethane is lignin-modified polycarbonate polyurethane. The invention further provides a water-soluble ink composition containing water-soluble polyurethane and its preparation method. Compared with various polyurethanes existing in the prior art, the water-soluble polyurethane provided by the invention can guarantee high heat resistance and simultaneously has good tensile strength and elongation at break. According to the invention, the product yield is greatly improved, and the problem of crack of the ink layer that occurs in a large number of products when IML moulding existing in the prior art is solved.

The invention discloses a secret key control method in encrypted storage equipment for fingerprint authentication. The secret key control method comprises the steps of inputting a fingerprint, extracting a protection secret key of the fingerprint from the fingerprint characteristic value of a fingerprint database, conducting encipherment protection to a working secret key for data encryption and decryption through the obtained protection secret key, deleting the protection secret key and the working secret key, and obtaining encrypted working secret key cipher text. By using the secret key control method in the encrypted storage equipment for the fingerprint authentication, the problem that the secret key in the encrypted storage equipment is deciphered by attackers currently is solved.

The invention belongs to the technical field of wood processing, and particularly discloses a manufacturing method for gum wood finger-joined floors. The manufacturing method comprises the following steps of drying, selecting, improvement of machining properties, humidifying, connection and combination, treatment of grooves and tongues, sanding, painting and the like. By using the manufacturing method for the gum wood finger-joined floors, the problems that in production of fast-growing gum wood finger-joined floors, sanding cost is high, loss of materials is high, the using amount of glue is high, tree laces crack, the moisture content of a portion between each two gum wood finger-joint floors is not uniform, finger joining is difficult, and the like are solved. The manufacturing method for the gum wood finger-joined floors has the advantages of low production cost, high product quality and the like.

The invention discloses a slipping type seamless telescopic device. A telescopic seam is arranged between main beams, upper surfaces of the main beams are provided with comb plates, and the comb plate arranged at the upper part of the telescopic seam is a trans-seam comb plate, and a fixing comb plate is connected with the trans-seam comb plate; a top paving layer is arranged at the upper part of the trans-seam comb plate, and both sides of the top paving layer are respectively provided with elastomer prefabricating blocks; left and right sides of the elastomer prefabricating blocks are respectively arranged with bituminous concrete paving layers. The slipping type seamless telescopic device and a bridge face paving layer can be formed to be a continuous body, so as to guarantee stable and comfortable driving; the driving noise is small and waterproof performance is good, and the slipping type seamless telescopic device is convenient to clean and remove snow, and other maintaining works; the structural design is more reasonable, and construction is convenient; the comb plates are respectively arranged beneath the paving layer and above the main beam, and can be fixedly moved; and thereby, the problem of empty lower part of the tooth end of the comb plate is effectively solved, and the shortcoming that the traditional seamless telescopic device is easy to crack is overcame.

The invention provides a concrete wall exterior heat preservation method which includes the following steps: A, prefabricating a bearing mesh plate: welding a deflected sandwich reinforced steel crosslinked mesh frame plate on a reinforced steel crosslinked mesh production line and transporting the welded deflected sandwich reinforced steel crosslinked mesh frame plate to the construction plant; B, assembling the bearing mesh plate: after the deflected sandwich reinforced steel crosslinked mesh frame plate is hoisted to the construction plant, colligating and connecting the anchoring bars, the girders and the reinforcing steel pillars, which are pre-left on the interior wall, with the anchor bars of the deflected sandwich reinforced steel crosslinked mesh network frame plate; C, directly spraying concrete with thickness of 3-10cm on one side of the deflected sandwich reinforced steel crosslinked mesh frame plate with flat griddings and intersected inclined wires as support to the framework; D, fixing the template at one side of the deflected sandwich reinforced steel crosslinked mesh frame plate through a flat reinforced steel mesh at the other side, and when the thickness of the concrete in step C reaches the desirable thickness, jetting concrete on one side of the template; E, after the surface of the wall is sprayed, jetting self-compacting concrete on the girders and the pillars. The method sprays concrete at the internal side and the external side of the exterior wall which needs heat preservation and bears weight step by step and can save large amount of templates and meanwhile shortens construction period, reduces project cost and effectively solves the problem that the exterior concrete protection layer outside the heat preservation layer cracks.

The invention provides a semiconductor assembly, a semiconductor device and a method for forming the semiconductor device. The semiconductor device includes a pad region located on the semiconductor substrate; a bump structure disposed over the pad region and electrically connected with the pad region. The bump structure includes a copper layer and a lead-free solder layer over the copper layer. The lead-free solder layer is a SnAg layer, and the Ag content in the SnAg layer is less than 1.6 weight percent. When the Ag content in the lead-free bump, the hardness of the bump will be reduced. Asofter bump could remove the crack owing to the heat stress.

The invention is about a sort of lightweight partition wall board. It is made from magnesium oxide, magnesium chloride, dry rock powder, flyash, French chalk, high alumina cement, ferrous sulfate, tertiary sodum phosphate, phosphoric acid solution and sawdust. The lightweight partition wall board has the following advantage: the fist, it can save energy, reduce cost and have no pollution. The second, the board has fine intensity, good water resistance and resistance to aging. The third, it has small shrinkage, get over the problem that appear when the boards join. The fourth, the partition wall board no longer distort for using inorganic material and controlling the quality of material. Lastly, it has good shock resistance, waterproof, fire resistance, soundproofing and it get over the partition wall board to be yellow.

The invention discloses iron tailing doped high-performance concrete and a manufacturing method thereof. Each cube of the iron tailing doped high-performance concrete is prepared from the following raw materials by weight: 100-450kg of silicate cement, 30-100kg of slag powder, 50-150kg of fly ash, 3-6kg of unsaturated polyester resin, 5-12kg of a water reducing agent, 500-800kg of iron tailings, 850-1050kg of stones and 150-180kg of water. The manufacturing method comprises the following steps of: (1) weighing the iron tailings and the stones according to raw material proportions, then spraying running water to humidify the iron tailings and the stones, and adding the iron tailings and the stones into a double-horizontal-shaft forced concrete mixer when internal water of the iron tailings and stones is saturated; and (2) adding the other raw materials into the double-horizontal-shaft forced concrete mixer according to raw material mass ratios, and stirring for 30-40 seconds to obtain the concrete. By adopting the iron tailing doped high-performance concrete, the integrity, stability and safety of a concrete structure are improved, the durability of the concrete is improved, and the service life of a building is prolonged.

A radiator cell component 9 is formed by a side plate 1, a long strip seal 2, a short strip seal 3, cold edge fins 4, hot edge fins 5 and partition plates 6. When the radiator cell component 9 is assembled and brazed, metal-sheet-shaped stainless steel brazing filler metal is selected, a connection plate 7 is added between the radiator cell component 9 and a gas-collecting hood 8, meanwhile the side plate 1 is enlarged, and a stainless steel plate-fin radiator is made and formed through the method of twice brazing and twice fusion welding. Due to the fact that the metal-sheet-shaped stainless steel brazing filler metal is selected, the first-pass yield of the brazing of the radiator cell component is improved. The connection plate 7 is added to the radiator cell component, the side plate 1 is enlarged, the solder joint of the radiator cell component is far from the welding joint of the arc welding of the gas-collecting hood 8 and the connection plate7 and the side plate 1, and therefore the phenomenon of fissures cannot occur.

The present invention discloses a novel side post molding art work and relevant mold characterized in that: the mold comprises an upper mold plate and a lower mold plate; the blank is placed on the lower mold plate; the blank is adjusted to a right position, the sliding block of the press moves downward, driving the upper mold to move downward. During the course of downward moving of the upper mold, a male mold firstly goes in contact with a knockout punch, and the panel is firmly clamped; when the male mold moves on downward, the air cushion of the press shrinks synchronously, driving a push off pin and the knockout punch to move downward synchronously, and press the middle panel with a constant pressure together with the knockout punch; at the same time the two side panels go in contact with the embedded blocks of a female mold. Along with the gradual downward motion of the male mold, the panels are pulled deep into a cavity formed by the embedded blocks of the female mold. When the pull process is over, the sliding block goes upward, and the male mold separates from the knockout punch; the knockout punch is pushed by the push off pin to push the working piece out of the cavity formed by the embedded blocks of the female mold, and a working circulation.is finished. Parts produced by adopting the mold and art work regarding the invention have high molding accuracy, stable size, external shape pleasing to the eye ,and ensure the planeness requirement of a side wall.

The invention discloses a collection unearthed historical site relic in-situ environment water supplement protection system and water supplement method. The collection unearthed historical site relic in-situ environment water supplement protection system is composed of a water purification device, a water temperature regulation and control device and a water supplement tail end device. The water purification device is utilized for conducting purification treatments such as filtration, algae removal and sterilization on urban water supply. According to signals fed back by a temperature sensor buried in soil, the water temperature regulation and control device is utilized for regulating and controlling the temperature of supplemented water so as to ensure that the temperature of the supplemented water is consistent with the temperature of the soil environment of a historical site. A soil water content sensor, a soil temperature sensor, a flow control valve and the water supplement tail end device composed of macromolecule water-absorbent resin are utilized for conducting slow permeation and water supplement on the historical site and the soil environment of the historical site so as to supplement water loss slowly evaporated by the unearthed relic and to maintain the wet in-situ environment formed before the relic is unearthed, and therefore seasoning crack damage, caused by water loss, to the historic site relic is avoided, and the unearthed historical site relic can be stored for a long time.

The invention discloses a mould-locking linkage recycled aggregate self-insulating plate. Rectangular double-row holes are arranged in an insulation plate. Heat insulation materials are filled in the double-row holes. The insulation plate is made of clay brick recycled aggregates. A method for producing the mould-locking linkage recycled aggregate self-insulating plate is also disclosed by the invention. The mould-locking linkage recycled aggregate self-insulating plate fully develops the functions of the clay brick recycled aggregates and improves the added value of the clay brick recycled aggregates greatly. The mould-locking recycled aggregates solve the crack problem of wall surface well, have good insulation performance, solve problems of heat bridge and cold bridge well and have the advantages of good durability, high construction efficiency, strong impermeability, etc.

The invention provides a solid oxide fuel cell with an anti-carbon function, and belongs to the solid oxide fuel cell based on a nickel positive electrode. The solid oxide fuel cell comprises an anode, an electrolyte, a cathode and a quartz airway tube; the solid oxide fuel cell is characterized in that an independent catalyst layer is arranged in the anode side; the catalyst layer comprises a base and a catalyst; the base material is an oxide material with high rigidity; and the catalyst is a material having high oxidation catalyst activity on hydrocarbon fuels. According to the solid oxide fuel cell with the anti-carbon function, the problem of cell expansion-cracking caused by unmatched thermal expansion of the catalyst and the anode is solved, and the carbon deposition of the anode is restrained effectively, so that the stability and the reliability of the solid oxide fuel cell are greatly improved.