408results about How to "Volume stability" patented technology

The invention provides a cement-based composite material used for a 3D printing technology as well as a preparation method and application thereof. The cement-based composite material is prepared from the following raw materials based on the total weight of the composite material: 33%-40% of cement, 0%-8% of inorganic powder, 32%-38% of tailing machine-made sand, 2.5%-3% of a high-molecular polymer, 0.1%-0.5% of a water reducing agent and 16.7%-20% of mixing water; a composite thickening time control agent, a thixotropic agent, a volume stabilizer and the like are added into a mixture to prepare an inorganic composite material; and then the inorganic composite material can be directly pumped into a 3D printer for building to be applied to construction. The cement-based composite material is an inorganic material and the materials are easily available; a lot of industrial waste materials can be used; therefore, the cement-based composite material is low in cost, energy-saving and environment-friendly; the condensation time can be flexibly controlled, and the material has super early strength, good caking property and strong stability; the requirements of 3D printing construction continuity of the building and the building strength are met so that the house building has good global stability and use safety; and the application and popularization of 3D printing technology can be greatly promoted.

A multi-phase personal care composition is described that comprises a first visually distinct structured phase and a second visually distinct structured phase. The first visually distinct structured phase comprises a cleansing phase that includes about 2% to about 23.5%, by weight of the cleansing phase, of surfactant component. Preferably, the surfactant component comprises at least one branched anionic surfactant.

The invention discloses a preformed material for post-tensioned prestressing pipeline vacuum grouting or mudjacking and a preparation method thereof. The preformed material includes the following components by weight percent: 65 to 95 percent of silicate cement, 0.01 to 3 percent of high-range water-reducing agent, 0 to 1 percent of stabilizing agent, 0.05 to 5 percent of retarding agent, 1 to 20 percent of expanding agent, 0.2 to 2 percent of corrosion inhibitor, 0.01 to 1 percent of air entraining agent and 0 to 30 percent of mineral materials, wherein by uniformly and proportionally mixing the silicate cement, the high-range water-reducing agent, the stabilizing agent, the retarding agent, the expanding agent, the corrosion inhibitor, the air entraining agent and the mineral materials, the post-tensioned prestressing pipeline vacuum grouting or mudjacking preformed material can be obtained. After being uniformly mixed and stirred with water with neutral pH value according to the water cement ratio ranging from 0.24 to 0.32, the preformed material can be used, the obtained grouting material has the advantages of low water cement ratio, favorable flowability, no water bleeding and delamination, and favorable pumpability; meanwhile, the preparation method of the preformed material is simple and the raw material sources of the preformed material are wide.

The invention discloses a nanometer silicon and carbon composite negative electrode material, a preparation method thereof and a lithium ion battery. The nanometer silicon and carbon composite negative electrode material is of a core-shell structure. A gap is formed between the outer wall of a core body and the inner wall of a shell layer, wherein the core body is made of nanometer silicon, and the shell layer is a nanometer porous carbon layer. The preparation method of the nanometer silicon and carbon composite negative electrode material comprises the steps of preparing nanometer silicon particles wrapped by SiO2; preparing nanometer silicon particles, wherein nanometer SiO2 is embedded into the nanometer silicon particles which are wrapped by organic carbon sources, and the surfaces of the nanometer silicon particles are oxidized; performing organic carbon source splitting decomposition on the nanometer silicon particles provided with the embedded nanometer SiO2 and oxidized surfaces and wrapped by the organic carbon sources, performing etching processing on the SiO2 on the nanometer silicon particles provided with the embedded nanometer SiO2 and oxidized surfaces and wrapped by amorphous carbon by adopting HF, and the like. The negative electrode material of the lithium ion battery is the nanometer silicon and carbon composite negative electrode material. The nanometer silicon and carbon composite negative electrode material and the lithium ion battery are excellent in cycling stability, specific capacity, rate capability and safety performance.

A floating solar system having a peripheral buoyant pontoon within which is suspended an array of individual photovoltaic panels each equipped with a float. A stabilizing skirt drops down into the water underneath the pontoon and creates a more placid “moon pool” within the pontoon to reduce turbulence from wave action and therefore enhance the efficiency of the array of photovoltaic panels. A plurality of the floating solar systems may be aggregated to form an island of units. The individual panels or rows or columns thereof may be flat (horizontal) or tilted so that they can be oriented more normally with regard to the sun's rays.

It has been discovered that high amplitude, low frequency, broadband spectrum pressure oscillations of sufficient time duration can help stabilize lung volumes and improve gas exchange in a patient receiving ventilation assistance by helping to recruit and stabilize alveoli. A novel device is presented which can produce pressure oscillations having high amplitudes, a low broad-band frequency spectrum and long time duration. Additionally, the device can maintain a patient's mean airway pressure at one or more controlled levels. The device can control the oscillatory amplitude, frequency range and composition, time duration, and mean airway pressure levels by adjusting certain device parameters, such as the angle and depth of the device in a fluid. A device and mechanical system for remotely adjusting and measuring the angle of the device in a fluid are also disclosed. Furthermore, a device and system are disclosed that can deliver pressure oscillations having high amplitudes, a low broad-band frequency spectrum, long time duration, and multiple mean airway inspiratory and expiratory pressure levels. The device and system also provide means for controlling respiration timing in a patient, including: breaths per minute, inspiratory time, and the ratio of inspiratory to expiratory time.

The invention belongs to the field of refractory materials and discloses a preparation method of a fused silica refractory casting material unwetted by an aluminum liquid, which comprises the following step of: enhancing a ground substance by adopting 10-20wt% of white alundum powder, 4-8wt% of calcium aluminate cement, 3-5wt% of hydrated alumina compound binding agent, 4-10wt% of silicon oxide micropowder and 3-6wt% of alumina micropowder, wherein 60-70wt% of fused silica is used as a main material, BaSO4 and Na3AlF6 is adopted as a compound aluminum liquid anti-wetting agent with the addition of 1-6wt%, and additional 0.12wt% of trimeric sodium phosphate and additional 0.03wt% of sodium hexametahposphate are adopted as dispensing agents. The casting material prepared by using the method has high strength, is unwetted by the aluminum liquid, has the highest use temperature of 1000 DEG C and can be used as the refractory materials, such as an aluminum flowing groove of an aluminum smelting furnace and the like.

A prosthetic device, system and method is arranged to generate negative pressure inside a prosthetic socket. A pump mechanism is connected to a prosthetic foot and has a fluid chamber in fluid communication with the prosthetic socket during gait for drawing air from the prosthetic socket in step phase, and expelling air into the atmosphere in swing phase. The vacuum assisted suspension results in secure and intimate suspension as the negative pressure formed inside the prosthetic socket holds a residuum firmly to walls of the prosthetic socket. The vacuum is preferably formed at the distal area of the prosthetic socket, and sealed by a suspension liner having a seal component.

The invention relates to an early strength fast hardening terminated anchor mortar material, which is characterized in that the material is formed by mixing and stirring cement, sand, porous fine sand, finely ground steel slag powder, fly ash, an early strength agent, rubber powder, silicon ash, a water reducing agent and an excitant. The parts by weight of the components are as follows: 100 parts of cement, 30-250 parts of sand, 5-25 parts of porous fine sand, 5-30 parts of finely ground steel slag powder, 10-30 parts of fly ash, 0.1-3 parts of early strength agent, 1-10 parts of rubber powder, 0-8 parts of silicon ash, 0.2-2 parts of water reducing agent and 1-5 parts of excitant. Finely ground converter slag which is naturally stored for 3-6 months is adopted for the finely ground steel slag powder and the specific surface area is 400-800m/kg; the content of magnesium oxide is 8-15%; the porous fine sand is shale ceramic sand or fly ash ceramic sand or the mixture of the shale ceramic sand and the fly ash ceramic sand based on random mixture ratio, with grain size of 0.10-2.6mm. The material provided by the invention has good mechanical property and adhesive property, low chloride ion content and shrinkage property, and high impermeability and anti-cracking performance, thereby preventing the prestressed reinforcement of track slabs from rusting.

A thermoplastic polyester resin is fed into a twin extruder, wherein a resin is heated for melting, thereby removing moisture in the resin by evacuating and sucking from a vent port thereof, injecting a foaming agent into the resin to which is pushed out as a foaming sheet and, after that, forming the foaming sheet which is divided into a forming body and a trimming loss, whereby the trimming loss is crushed to obtain crushed materials which are provided so as to put the materials into the twin extruder as collection materials and recycle them.

The invention relates to a high-strength pore-closed mullite material and a preparation method thereof. The material comprises, by weight, 30-84wt% of alumina raw material, 1-55wt% of alumina-silica raw material, 15-60% of silica raw material and 2-10wt% of additive. The preparation method includes: mixing the raw materials according to the above proportion, adding the additive, stirring well, and pouring into a die; performing mechanical pressing under 80-150MPa to obtain a blank, and drying the blank at 60-140 DEG C for 3-16h; putting the blank in a high-temperature kiln for calcining to obtain the high-strength pore-closed mullite material. Sintering in-situ pore forming technology is adopted, so that the high-strength pore-closed mullite material prepared by the method has the advantages of high closed porosity, high pressure-resistant strength and high refractoriness under load and can be used for a long time at high temperature of 1550-1700 DEG C.

The invention discloses an anhydrous stemming for a blast-furnace tapping hole. Tar oil with specific weight of 1.15-1.16 or mixed oil of tar oil and anthracene oil is used as a binding agent, more than 50% of coarse and middle particles are added into a particle composition of the formulation, the content of fine powder with the particle size not more than 0.088 mm is controlled below 50%, a great amount of sericite is added into the formulation, and 40-70 mesh refined quartz sand is added. The stemming has good air permeability and rapid sintering performance and can be rapidly hardened within 20-30 min, the gas can be exhausted through ventilation holes, the strength of the stemming can be rapidly increased within short time and can satisfy about 30 min continuous opening tapping of single tapping holes of large and medium blast furnaces.

The invention discloses raw materials for preparing an anti-corrosion mullite brick, comprising calcium hexaluminate, andalusite, sillimanite, alumina, cordierite, pyrophyllite, kaolin, refractory oxide, foaming agent and binding agent. The preparation method includes the following steps: the sillimanite, alumina, cordierite, pyrophyllite, kaolin, refractory oxide and binding agent are added into a grinding machine to be ground after material preparation, so as to obtain base material; the calcium hexaluminate and andalusite are added into a kollermill to be mixed and milled for 5-10 minutes, water is added until the surface is wetted, so as to obtain particle aggregate, and the base material is added into the kollermill to be mixed, milled and stirred with the particle aggregate, so as to obtain mixture; and water is injected into the mixture and stirring is carried out to form muddy mixture and green brick is obtained, and the green brick is placed into a kiln to be sintered into the anti-corrosion mullite brick finished product. The mullite brick prepared by the raw materials and preparation method has the advantages of low thermal conductivity, good thermal insulation property and strong corrosion resistance.

An optically guided munition and control system has a replacement fuse assembly mounted on the front of a munition body or shell casing. An optical seeker subsystem detects an illuminated target and supplies signals to a processor. The processor develops steering commands sent to a flight control subsystem having a plurality of guidance canards which are actuated by drive motors through gear assemblies. The roll of the munition is established and left/right and up/down steering commands are sent to the canard drive motors based upon the optical seeker subsystem detection of the target illuminator. Range adjustment is based upon bore sight lockdown angle and cross range control is based upon left/right centering error. A code is contained in the optical radiation received from the illuminated target which must be validated by a preset code in the system processor to arm the munition.

The invention belongs to the technical field of building materials, and discloses novel heat-insulation dry powder mortar. The mortar consists of portland cement, fly ash, vitrified beads, floating beads, heavy calcium, cellulose, latex powder and the like. Compared with conventional heat-insulation mortar, the novel heat-insulation dry powder mortar provided by the invention has the advantages of high strength, light weight, high bond strength and the like.