558results about How to "No radioactivity" patented technology

The invention relates to nano optical functional materials, especially relates to an organic functional luminescent carbon quantum dots with high luminescent efficiency, a preparation method therefor and applications thereof. The preparation method employs a single-step pyrolysis synthesis method: organic compounds with a low decomposition temperature (150-300 DEG C) is heated at a temperature of 150-350 DEG C (the organic compounds are generally heated for 1-360min and heating methods comprise organic pyrolysis, hydrothermal method and the like) and subjected to a pyrolytic reaction; organic functional luminescent carbon quantum dots are obtained after post-treatment and purification. Surfaces of carbon quantum dots are modified with organosilane or organic high-molecular compounds with acylamino to form the organic functional luminescent carbon quantum dots. The organic functional luminescent carbon quantum dots can be used as luminescent functional materials, optical functional nano hybrid composite materials or used as biological living cell imaging materials.

The invention discloses thermal insulation mortar which comprises the following components in percentage by weight: 20 to 60 percent of caustic calcined magnesia, 1 to 25 percent of fly ash, 5 to 35 percent of thickening time control agent, 0 to 40 percent of enhanced thickener, 1 to 20 percent of kieselguhr, 5 to 35 percent of expanded aggregate, 0 to 5 percent of polystyrene foam particles, 0 to 0.2 percent of polypropylene fiber, 0.5 to 8 percent of water-resisting admixture, and 0 to 2 percent of water reducing agent. The thermal insulation mortar has the characteristics of capability of coagulating and hardening quickly and having strong binding capacity with base materials, good volume stability, capability of producing volume micro-expansion in the process of coagulating and hardening, no crack, no splitting, strong water resistance, ageing resistance, long service life, light weight, and good heat preservation and heat insulation performance, wherein the coefficient of thermal conductivity is 0.05 to 0.30 W/m.k. The thermal insulation mortar has the advantages of no toxicity, odourlessness, zero radioactivity, no harm to human bodies, no pollution to environments, energy conservation, environmental friendliness and low production cost.

The invention relates to an autoclaved aerated concrete block and a manufacturing method thereof, belongs to the technical field of building materials, and aims at solving the problems of high manufacturing cost and poor quality of products of the autoclaved aerated concrete block in the prior art. The autoclaved aerated concrete block comprises main materials, water and a foaming agent; the main materials include the following components (in percentage by weight): 65%-75% of tailing sand, 8%-12% of quick lime, 15%-18% of cement, and 2%-5% of gypsum; the material-to-water ratio ranges from 0.57 to 0.62; the foaming agent is added proportionally by 500g/m3 according to the total volume of the materials. The autoclaved aerated concrete block has the advantages of low manufacturing cost, convenient construction, environmental protection and energy conservation; the block further has the advantages of low weight, high heat retaining property, high anti-permeability, good fireproof performance, good sound insulation and sound absorption properties, accurate size, high strength and no radioactivity.

The invention belongs to the field of nondestructive testing and relates to a method for nondestructive measurement of a residual stress field in a metal plate through ultrasonic waves. The method for nondestructive measurement of the residual stress field in the metal plate through the ultrasonic waves is beneficial to conducting nondestructive evaluation on the residual stress in the metal plate. The single-time measuring time of the method is only about 20 seconds and is dozens of times less than the single-time measuring time of a traditional X-ray residual stress measuring method, and the detection speed is high; meanwhile, the measurement depth in the method is adjustable, the maximum depth can reach 3mm and is dozens of times that of the measuring depth in the X-ray measuring method, and thus the measuring depth is large. The method is provided for measuring large-range residual stress distribution inside the plate, and a three-dimensional diagram or a contour map of the residual stress distribution can be obtained. The cost for the single-time measuring of the method is dozens of times less than that of the X-ray measuring method, obvious economy is achieved. The method is free of radioactivity and is safer compared with the X-ray measuring method.

The invention belongs to the building material technique field, in particular relates to a building thermal insulating mortar. The building thermal insulating mortar is characterized in that the mortar is composed of dry powder and water, the dry powder and water are present in a weight ratio of 1:1.3, when in use, the dry powder is added to the water and agitated evenly; and the dry powder is mixed by materials of modified cement, modified fly ashes, a re-dispersible latex powder, wood fibers, polypropylene fibers, calcium formate, hydroxypropyl methylcellulose, hydrophobic agent, multi-functional auxiliary agent and modified expanded perlite, materials of the dry powder include: 500 parts of modified cement, 160 parts of modified fly ashes, 25 parts of re-dispersible latex powder, 3 parts of wood fibers, 1 part of polypropylene fiber, 5 parts of calcium formate, 6 parts of hydroxypropyl methylcellulose, 1 part of hydrophobic agent, 3 parts of multi-functional auxiliary agent and 300 parts of modified expanded perlite by weight. The building thermal insulating mortar has advantages of strong heat preservation, firm bonding with wall bodies, compression resistance, superior tensile performance, good weathering resistance, environmental protection, and excellent waterproofing, anti-cracking and shedding prevention properties.

The invention belongs to the field of nondestructive detection and relates to a method for nondestructive evaluation of residual stress levels in an aluminum alloy forged piece through ultrasonic waves. According to the method, the phenomenon that the propagation speed of the ultrasonic waves in materials can be affected by stress in the materials to a certain extent is used, and the difference of residual stress levels among different positions in the large size aluminum alloy forged piece is reflected through changes of sound speeds. The method has the advantages of being high in detection speed, large in measuring depth, good in economy and the like. The residual stress in the large size aluminum alloy forged piece is measured through the sound elastic effect of the ultrasonic waves in the method, and the method has the advantages of being high in measuring speed, convenient to use, flexible in measuring range, good in economy and the like. The single-time measuring time of the method is about five minutes and is shorter that the single-time measuring time of a neutron diffraction residual stress measuring method, the detection speed is high, the maximum measuring depth of the method can reach 400 mm, is larger that the measuring depth of the neutron diffraction method, and is much larger that the measuring depth of an X-ray method or a Barkhausen noise method.

The invention relates to a fireproof foam concrete door core plate and a preparation method thereof. A foam concrete base plate of the door core plate is prepared from cement paste and foam used for concrete in a volume ratio of 1:(5-12); the cement paste comprises the following raw materials in part: 80 to 100 parts of Portland cement, 10 to 30 parts of filling material, 30 to 50 parts of water, 2 to 7 parts of EVA emulsion, 2 to 6 parts of waterproof agent, 0.5 to 1.0 part of water repellent, 1.5 to 2.5 parts of water reducing agent, and 1 to 3 parts of early strength agent; and the volume weight of the foam used for the concrete is 70g/L to 90g/L, and the foam is prepared by adding water into a high-quality foaming agent for foaming. The fireproof foam concrete door core plate has the advantages of light weight, high strength, low heat conductivity coefficient, good fireproof and waterproof performance, long service life and the like, the preparation process is simple, and the cost is low.

The invention relates to organic phosphonic (phosphoric) acid rare-earth salt fire retardant and a synthetic method and application thereof, which belongs to the fields of fine chemical and macromolecular materials. The low-toxic, low-smoke, environment-friendly and efficient fire retardant is formed by combining with rare earth elements in organic phosphonic (phosphoric) acid structure. Compared with the organic phosphorous compound, the fire retardant has extremely high stability at normal temperature and plastic processing temperature; moreover, the use of rare earth elements ensures that the fire retardant and other components in macromolecular material are formed into a combination having better effects than Van Der Waals Force, hydrogen bond and the like; particularly, when mixed with other components of inflatable composite fire retardant, the fire retardant can obtain better synergic effects than currently used phosphinates such as aluminum phosphinate, zinc phosphinate and the like; moreover, the obtained macromolecular material can maintain better physical and mechanical properties.

The invention discloses a water glass transparent reflecting heat-insulation coating material and a preparation method thereof, wherein the water glass transparent reflecting heat-insulation coating material comprises, by mass, 35-50% of an aqueous acrylic emulsion, 5-15% of an aqueous silica sol, 5-15% of an aqueous polyurethane, 5-10% of an aqueous nanometer antimony tin oxide heat-insulation slurry, 5-10% of an aqueous nanometer lanthanum hexaboride heat-insulation slurry, 5-10% of an aqueous nanometer vanadium dioxide heat-insulation slurry, 0.1-0.5% of an anti-foaming agent, 0.1-0.3% of a wetting dispersing agent, 0.2-0.5% of a leveling agent, 0.2-1% of a thickening agent, 0.1-0.2% of an anti-mildew antibacterial agent, 0.5-2.5% of a film forming auxiliary agent, 0.5-2% of a silane coupling agent, and 5-25% of deionized water.

The invention relates to a waterproof paint for architecture and building materials, especially to a water-base paint which is widely applied to brushing objects such as boarded floor, toy for children, corrugated paper, inner wall, outer wall, woodwork, damp proofing, cement, leak stopping, metal product, etc. The prescription of water-base paint totally differs from the traditional one, comprising: adding raw materials such as glycerin, xylitol, etc., except crylic acid emulsion, which are food-grade raw materials substantially, nontoxic and environmental-friendly absolutely. The water-base paint can be constructed directly, bring handsome looking and relieving labor strength of constructors. Furthermore, the water-base paint does not damage health of constructors, with multiple advantages of current waterproof paints.

The invention discloses a cement-based wave-absorbing material doped by graphene oxide and a preparation method thereof. The preparation method comprises the following steps: weighing cement for subsequent usage; weighing silica fume according to a certain mass ratio, pouring the cement and silica fume into a stirring pot, carrying out uniform mixing under stirring, then weighing nanometer ferriferrous oxide and nanometer nickel according to a certain mass ratio, pouring the weighed nanometer ferriferrous oxide and nanometer nickel into the stirring pot and carrying out low-speed stirring for 2 to 5 min; adding dispersion liquid of graphene oxide into a mixture obtained in the previous step and carrying out ultrasonic vibration; and finally, weighing water and a water reducer according to a mass ratio, adding the weighed water and water reducer into the mixture, carrying out low-speed stirring with an agitator for 2 to 5 min, stopping stirring for 10 to 30 s, then carrying out high-speed stirring for 2 to 5 min, injecting obtained slurry into a mold, carrying out vibration molding, then carrying out maintenance in a constant-temperature constant-humidity case, carrying out demolding in 24 h and then continuing maintenance under same conditions so as to obtain the cement-based wave-absorbing material. The cement-based wave-absorbing material doped by graphene oxide has the advantages of good wave absorption performance, wide frequency range, environment friendliness and no radioactivity; the preparation method is simple in process, easy in shaping and suitable for standard production; and the prepared material can be well bonded with buildings.

The present invention discloses a long-afterglow luminous composite fibre and its preparation method. Said method includes the following steps: using luminous polyamide as core layer, and using fibre-formed polymer polyamide, polyester and polyolefin as skin layer, and making constituent spinning so as to obtain the invented product. The long-afterglow polymer polyamide fibre is formed from polyamide and alkaline earth metal aluminate which has luminous effective quantity and is activated by Eu(2+). The fluorescent powder is the alkaline earth metal aluminate series, and is non-toxic, has no radioactivity, high luminous intensity, long afterglow time and stable chemical property, so that it has extensive application range.

The invention relates to a nickel-free black tin cobalt alloy plating solution and an electroplating technology by using same. The parameters and contents of all components of the plating solution are as follows: the content of tin ions in a tin salt is 0.05-6g/L; the content of cobalt ions in a cobalt salt is 0.05-0.8g/L; the content of third metallic ions is 0.02-50g/L; the content of a complexing agent is 0.1-180g/L; the content of a blacking agent is 0.1-50g/L; the content of a PH buffer is 5-300g/L; the baume degree of the plating solution is 6-250; the temperature is 20-55 DEG C; and PH is 9-13. According to the technology provided by the invention, tin is taken as a main alloy layer and few cobalt and third and fourth metal ions are added in tin to form a ternary or quaternary alloy system; the cobalt content in the common black tin cobalt alloy plating solution excesses 8g/L, but the cobalt content is reduced to 0.05g/L according to the new electroplating technology provided by the invention; the special biodegradable or non-biodegradable stabilizing complexing agent and PH buffer are used, so that the production cost is lowered; and the nickel-free black tin cobalt alloy plating solution meets the limitation requirement on CO in the European Union Rosh standard, Germany LMBG standard, Mattel children toy standard, European Oeko-Tex Standard 100 standard and the like.

The indicator comprises organic solvent with 10-40wtúÑ inorganic salt and 0.1wtúÑ-5wtúÑ chromaticity indicator without cobalt. Thus, factor of polluting environment and harming health to people is removed thoroughly. The invented product is excellent product of environment protection with low cost. Allochroic silica gel made from the invented indicator can be used in multiple regenerations.

The invention provides a long-afterglow luminescent material and a preparation method thereof. The long-afterglow luminescent material is a[Ln[2-x]O3.xRe].b[(1-y)Al2O3.yGa2O3], wherein Ln is two of Gd, Y, Lu and La, and Re is one or more of Tb, Eu, Ce, Nd, Er, Yb and Bi. Compared with the prior art, the long-afterglow luminescent material uses Ln2O3, Al2O3 and Ga2O3 as matrixes and Re as the activator to obtain the long afterglow property; the mole coefficients of the components are changed, so that the luminescent material can be excited by blue light to obtain long afterglow, and the luminescent color of the long afterglow can vary between blue green and orange. The luminescent material has the advantages of long afterglow time, high brightness, high physicochemical stability, no toxicity or harm, no radioactivity and the like, and can not do harm to the human body and environment.

The invention relates to a method for producing anti-pollution flexible real stone face tiles. The invention adopts a technical scheme that: weather-proof protective layer slurry is sprayed on a polytetrafluoroethylene conveying belt, which can be demoulded, on a production line, the sprayed slurry is quickly dehydrated by microwaves to form a film, then a real stone paint with well prepared viscosity is scraped on the film, next decorative mortar with well prepared viscosity is scraped on the real stone paint, later on aluminate cement powder which can be activated again is sprayed on a non-solidified decorative mortar layer, the aluminate cement powder is baked and dehydrated and the conveying belt is demoulded to give a semi-finished product; weather-proof protective layer is coated with anti-pollution layer powder by static absorption; and finally, the products are manufactured by cutting a large decorative tile and testing and packaging the cut decorative tiles. The face tiles have the advantages of avoiding surface polluted due to resistance to cement mortar bonding agent, saving a cleaning working procedure in flexible face material bonding construction, increasing the bonding strength of the flexible real stone face tills to walls, along with high flexibility, weather-proof performance, high manufacturing efficiency, no high-temperature sintering, energy conservation and environmental protection.

The invention relates to thiophosphate cement. The thiophosphate cement is prepared from 4 to 60 parts by weight of heavy-calcined magnesia, 3 to 50 parts of one or more dihydric phosphates, 1 to 6 parts by weight of one or more solidification adjustment agents, 8 to 36 parts by weight of light-calcined magnesia, 1 to 10 parts by weight of one or more sulphur-containing components and 1 to 20 parts by weight of industrial waste residue powder. The thiophosphate cement has the advantages of optionally adjustable coagulation time of a few minutes to a few hours, high early strength, high strength, high bonding strength, no reduction of later strength, micro-dilatation, and fast coagulation hardening at a low temperature. The thiophosphate cement is convenient for construction, is suitable for emergency repair of engineering structure defects of buildings, bridges, roads, airports, tunnels, dams and canals, can be used for cemented gravels, industrial waste residues and lightweight aggregate, can be used for preparation of building material products such as building mortar, concrete bricks and building blocks, thermal insulation wallboards and thermal insulation roofs, and has wide application prospects in the fields of nuclear waste, municipal waste and sludge treatment, eco-environment protection and bioengineering.

The invention discloses a method for preparing an artificial vesuvianite building block from Bayer red mud. The method for preparing the artificial vesuvianite building block from Bayer red mud comprises the following steps of carrying out milling and slurrying of Bayer red mud, carrying out mixing and blank preparation, carrying out drying and sintering, and carrying out cooling. The method for preparing the artificial vesuvianite building block from Bayer red mud has a low investment cost and simple processes, realizes the preparation of the artificial vesuvianite building block which is a novel artificial non-metallic porous material vesuvianite building block, and provides a novel and reliable approach for Bayer red mud comprehensive utilization. Because of addition of fine coal powder, a leavening agent, a foaming agent and a molding binder in ingredients, a sintered blank has regular or irregular micro-apertures, small apertures and big apertures thereby forming the artificial vesuvianite building block which is a sponge-like ceramic building product. The artificial vesuvianite building block can absorb sound, reduce noise, improve a hearing environment, adjust air humidity by its unique breathing function and improve an ecological environment. Therefore, the artificial vesuvianite building block can be widely utilized for masonry building, floor building and wall decoration, and is an ideal, eco-friendly and energy-saving building and decorative material.

The invention relates to an exterior wall tile and a production method thereof, in particular to a production method of a sandstone-like porcelain exterior wall tile. The production method comprises the following steps: using architecturally applicable materials to press an adobe of the exterior wall tile; adding sandstone particles with a fineness of 20-150 meshes in a suspending agent to prepare a glaze slurry; spraying or coating the glaze slurry on the surface of the adobe; drying, preheating, sintering and cooling the adobe covered with the glaze slurry to obtain a finished product. According to the invention, the whole sandstone-like porcelain exterior wall tile is prepared by only needing one sintering process, thus fuel and energy of sintering one time are saved compared with the prior art, the energy consumption and exhaust discharge of products with same specification are greatly reduced; and the whole exterior wall tile has the decorative effect similar to that of simulation sandstone, thus compared with the prior art, the exterior wall tile disclosed herein has better decorative effect and lower production cost.