64 results about "Body density" patented technology

A subject of the invention relates to providing a powder for a translucent zirconia sintered body which is necessary for the production of a zirconia sintered body having a high sintered-body density and high strength and giving an excellent sense of translucency, without conducting any special sintering, such as HIP sintering. The invention relates to a technique for obtaining, through normal-pressure sintering, a translucent zirconia sintered body characterized by comprising zirconia which contains 2-4 mol % yttria as a stabilizer and has an alumina content of 0.2 wt % or lower, and by having a relative density of 99.8% or higher and a total light transmittance, as measured at a thickness of 1.0 mm, of 35% or higher. It is preferred that a powder containing 0-0.2 wt % alumina with a particle diameter of 0.01-0.5 μm, having a BET specific surface area of 5-16 m²/g and an average particle diameter of 0.3-0.7 μm, and having a rate of sintering shrinkage in normal-pressure sintering (Δρ/ΔT; g/cm³·° C.) of 0.0125 or higher but 0.0160 or lower should be subjected to normal-pressure sintering in the atmosphere.

An apparatus for measurement of an individual's body composition includes a pressure mat configured to fully support an adult supine patient and to provide a series of pressure readings at a series of cells over the surface of the pressure mat and then electronically transmits the readings to a computer or the like. The pressure readings along with other relevant clinical information such as the patient's weight are then used to determine the patient's body composition such as percent body fat, body density, total body volume, fat mass and fat-free mass.

A pink-colored zirconia sintered body has a high sintered body density and strength, and a colored translucency, which has a color tone similar to teeth and excellent translucency and has high aesthetic properties. A colored translucent zirconia sintered body includes from 2 to 4 mol % of yttria, from 0.02 to 0.8 mol % of Er₂O₃, at least 20 and less than 2,000 ppm, as calculated as Fe₂O₃, of an iron compound, at least 0.005 and less than 0.2 wt % of Al₂O₃ and the rest being zirconia, and having a lightness L* of from 55 to 75, a* of from 0 to 10 and b* of from 0 to 30 as chromatic parameters stipulated in JIS-Z8729, has a relative density of at least 99.80% and has a total light transmittance of at least 18% and at most 40% as measured at a sample thickness of 1 mm using a D65 light source.

The invention is concerned with chronology research determination technology field about the Quaternary epoch, geography, disaster, archeology, especially a alpha recoil track determining age method, including: a) sample collection; b) observation sample preparation; c) etch observation sample; d) observation sample equipment; e) statistic alpha recoil track value; f) measure vertical etching speed; g) determine alpha recoil track body density; h) determine the uranium thorium content of the mica sample; i) compute the alpha recoil track age of the mica.

The invention, which belongs to the charcoal electrode technology field, discloses a charcoal electrode specially used in smelting of ferroalloy and a preparation method thereof. A main technology is characterized by: screening calcined solid-raw-material electrical calcined coal, petroleum coke, graphite scraps and a secondary material of carbon black; after performing burdening through using anelectronic batching system, entering into a kneading boiler for stirring and drily mixing; then adding coal tar pitch and performing kneading; molding, roasting and machining so as to produce a charcoal electrode specially used in the smelting of ferroalloy. In the charcoal electrode specially used in the smelting of ferroalloy, volatile matter of asphalt does not exist; body density is high; an ash content is low; inoxidability is good. The volatile matter of flue gas given off by roasting during a usage process can be avoided if the charcoal electrode substitutes a self baking electrode. Electricity consumption during roasting the self baking electrode can be saved. Therefore, energy saving and environmental protection can be realized. Installation is simple. Soft breaking accident and hard breaking accident of the electrode caused by careless operation can not be generated so that safety can be substantially raised.

The invention comprises a method and apparatus for using a multi-layer multi-color scintillation based detector element to image a tumor of a patient using a process of determining residual energies of positively charged particles after passing through the patient, the process comprising the steps of: (1) transmitting the positively charged particles at known energies through the patient and into a multi-layer detector element; (2) detecting first and second secondary photons, resultant from passage of the positively charged particles, respectively from a first layer of a first scintillation material and a second layer of a second scintillation material at two respective layer depths, where the first wavelength range differs from the second wavelength range; (4) determining residual energies of the positively charged particles, using output from the step of detecting; and (5) relating the residual energies to body densities to generate an image.

The invention relates to glass ware, in particular to a milk white glass wine bottle which is formed by components including aluminum oxide, quartz sand, feldspar powder, calcite, sodium fluosilicate, industrial sodium carbonate, zinc oxide and the like. Compared with the prior art, the milk white glass wine bottle has the advantages of being high in bottle opening size accuracy, smooth in surface and strong in bottle body density structure and anti-collision strength. Therefore, the milk white glass wine bottle better prevents wine leakage at a bottle opening, wine seepage at a bottle body, bottle oxidizing and wine volatilization, greatly satisfies reliability and safety of long-distance transportation, and greatly reduces broken percentage in the disassembly process to some extent. The wine bottle belongs to environment-friendly products, broken glass can be processed for secondary molding, and characteristics of the glass wine bottle are not changed. The milk white glass wine bottle greatly reduces waste of social resources and has no pollution to environment and social life.

The invention relates to a limestone water-containing layer grouting reconstruction material suitable for superlong-distance pumping, and the material is composed of, in parts by mass, 65-70 parts of burned coal gangue, 20-25 parts of sulphate aluminium cement clinker, 8-15 parts of steel slag micro powder, and 9-12 parts of an extra-additive active initiator. The active initiator comprises, in parts by mass, 13-19 parts of alum, 20-28 parts of talcum powder, 8-13 parts of guar gum, 5-8 parts of hydroxypropyl methyl cellulose, and 40-55 parts of gypsum powder. The material possesses the characteristics of being high in slurry stability, weak in environment temperature influence, suitable for long-distance pumping, good in grouting property, high in stone body density, high in impermeability, wide in raw material source, low in price, and the like.

The invention discloses an impact force calculation method for a viscous debris flow, and application thereof. The calculation method comprises the following steps that: firstly, through sample experiment screening, determining a maximum particle size and a median particle size in a debris flow body, then, through sampling actual measurement, determining debris flow body density and debris flow kinematic velocity, and finally, carrying out calculation to obtain the impact force of the viscous debris flow. By use of the method, the influence of viscous debris flow particle graduation is comprehensively considered, the empirical coefficient of a dynamic pressure impact force calculation formula is corrected through a flume experiment, parameters required by calculation can be obtained through field survey, sampling and experiment analysis, the impact force of viscous debris flow motion can be reasonably determined, a basis is provided for viscous debris flow prevention and treatment engineering, and the method is suitable for the practical engineering design requirements of the viscous debris flow.

The invention discloses a powder billet forming device. The powder billet forming device comprises a die, an extruding rod, an amplitude-change pole and an energy converter, wherein the extruding rod is axially mounted in the die; one end of the amplitude-change pole is radially connected with the die, and the other end of the amplitude-change pole is connected with the energy converter; the electricity energy can be converted into mechanical vibration for driving the amplitude-change pole through the energy converter while axial pressure is applied to powder in the die through the extruding rod, and the die is driven to vibrate to apply radial pressure to the powder through the amplitude-change pole. The device is simple in structure, reliable in performance, and capable of quickly releasing the die; the powder is driven to vibrate through the die, so that the powder vibrating area is increased, and the powder can be uniformly vibrated, and as a result, the formed body density is improved, and the stress of the body is uniformly distributed. In addition, the invention also discloses a powder billet forming method.

Provided are: an activated carbon molded body which has a large pore volume and has the strength to allow a desired shape to be molded therefrom; and a method for manufacturing the same. This activated carbon molded body has a pore volume per molded body volume (cm³/cm³) obtained from the product of the total pore volume (cm³/g) of the activated carbon molded body and the molded body density (g/cm³) of 0.39 cm³/cm³ or greater, and a strength of 0.1 MPa or greater.

The invention relates to a light grouting material for grouting treatment of a highway goaf and a preparation method of the light grouting material. An existing under-highway goaf grouting treatment technology has the defects of being high in grout water content and large in unit weight. Cement, coal ash and water are mixed and evenly stirred to obtain cement and coal ash slurry; a negative and positive zwitter ion surface active agent is added to water to be evenly stirred to obtain a surface active agent solution, a stabilizer is added to the surface active agent solution to obtain a negative and positive zwitter surface active agent compound foaming agent solution; cement and coal ash slurry is doped with the negative and positive zwitter surface active agent compound foaming agent solution to be stirred to obtain the light grouting material. The prepared light grouting material is small in stone body density, large in intensity, good in construction performance, little in grouting and much in filling, and capable of overcoming the defects of the prior art.

The invention discloses a self-adaptive zirconium oxide tundish nozzle. Serving as functional fireproof materials, most of sizing nozzles have relatively short service life because of the problems of erosion resistance and hole shrinkage. According to the invention, in the research direction, by researching the crystalline phase, particle size distribution and firing process of zirconium oxide, on the premise that the thermal shock stability and erosion resistance of products are ensured, in the process of eroding a zirconium core in molten steel, a second sintering shrinkage phenomenon is caused, thereby achieving the dynamic change of pore sizes; and tracking is carried out aiming at the special service environment of a steel mill, thereby controlling the initial air hole and body density so as to achieve the dynamic balance of nozzle pore sizes. In the aspect of hole shrinkage, Al2O3 nodulation is mainly prevented. Therefore, in the invention, argon blowing-free materials are used for preventing blockage, partial aluminum-rich desiliconized monoclinic zirconium oxide is added, surface sintering of the products is promoted, and smooth surfaces are not favorable for attachment of aluminum oxide.

The invention discloses smoke-free environment-friendly stemming. The smoke-free environment-friendly stemming is prepared from the following component in percentage by mass: 50 to 60 percent of high-aluminum aggregate, 10 to 20 percent of Guangxi white clay, 5 to 10 percent of kyanite, 3 to 8 percent of sericite, 3 to 5 percent of bentonite, 10 to 20 percent of high-aluminum refractory fine powder, 8 to 15 percent of binding agent, 0.2 to 0.5 percent of moisturizer and 0.1 to 0.3 percent of plasticizer. Meanwhile, the invention also discloses a preparation method of the smoke-free environment-friendly stemming. Compared with the prior art, the smoke-free environment-friendly stemming disclosed by the invention has the advantages that a production technology is simple and moderate in cost; in addition, no smoke is released in the use process, so better environment-friendly performance is realized; the smoke-free environment-friendly stemming is good in flushing resistance, good in plasticity and proper in body density, is not easy to broach and is easy to open and block; the phenomena of including iron, breaking iron notches and the like are avoided; besides, the smoke-free environment-friendly stemming can be directly installed for using without baking, and is short in heated hardening time; stemming removal can be realized by blocking for 5 minutes; the smoke-free environment-friendly stemming is more convenient to operate and excellent in slag-resistant performance, so that comprehensive energy consumption is greatly reduced and the working environment is greatly improved.

The invention belongs to the technical field of noise reduction and discloses a sound insulation cotton with multi-layer sound absorbing materials and a compressor. The sound insulation cotton includes an inner sound absorbing material layer and an outer sound insulation material layer, wherein the sound absorbing material layer includes at least two layers of sound absorbing materials of the samematerial or different materials with the body density increasing layer by layer or the porosity decreasing layer by layer or the flow resistance increasing layer by layer or the structure factor increasing layer by layer from the inside to the outside, the sound insulation material layer includes a layer of sound insulation materials, the sound absorbing material layer is made by stitching all the sound absorbing materials with sutures, and the layer with the largest density or the smallest porosity, the largest flow resistance or the largest structural factor of the sound absorbing materiallayer is cemented with the sound insulation material layer. The sound insulation cotton is advantaged in that the sound insulation cotton has a wide range of sources, simple structure, easy processingand wide applicability, has a higher sound absorption coefficient, is more conducive to noise absorption, especially for noise with a wide frequency band.

The invention discloses light steel ladle permanent layer castable. The castable comprises the following components in percentage by weight: 5-50% of 1-25mm corundum, 10-50% of 1-15mm alumina, 1-15% of 0.001-0.074mm corundum, 1-15% of 0.001-0.074mm alumina, 0.5-2% of 0.01-0.5mm plastic foam particle, 1-5% of pure calcium aluminate cement, 1-5% of organic additives and 1-5% of a water reducer. The plastic foam particle is added in the light steel ladle permanent layer castable and uniformly-distributed cavities below 0.5mm are formed in the castable after the plastic foam particle is heated and molten at high temperature, so that the body density of the steel ladle permanent layer castable is reduced and the effect of preserving the temperature of molten steel is realized.

The invention discloses a method for preparing polyacrylonitrile carbon fibers. The method is realized through the following steps: (1) carrying out infrared laser irradiation on polyacrylonitrile fiber protofilaments to obtain pre-oxidized fibers; (2) carrying out low-temprature carbonization on the pre-oxidized fibers in a nitrogen gas atmosphere to obtain low-temprature carbonized fibers; (3) carrying out high-temprature carbonization on the low-temprature carbonized fibers to obtain the polyacrylonitrile carbon fibers. According to the method disclosed by the invention, the polyacrylonitrile fiber protofilaments are subjected to pre-oxidization treatment through the infrared laser irradiation and rapid heating can be realized; the thermal stabilization time is shortened and the pre-oxidized fibers with suitable cyclization degree, orientation density and body density can be obtained; the pre-oxidized fibers are subjected to low-temprature carbonization and high-temprature carbonization treatment, so that the obtained carbon fibers have relatively high strength and orientation degree. The polyacrylonitrile fiber protofilaments are treated by adopting the infrared laser irradiation, so that the production efficiency of the carbon fibers is remarkably improved and the production cost of the carbon fibers is further reduced; furthermore, the commoditization of the production ofthe carbon fibers is easy to realize and the high-performance carbon fibers are obtained.

The invention comprises a method and apparatus for using a multi-layer multi-color scintillation based detector element to image a tumor of a patient using a process of determining residual energies of positively charged particles after passing through the patient, the process comprising the steps of: (1) transmitting the positively charged particles at known energies through the patient and into a multi-layer detector element; (2) detecting first and second secondary photons, resultant from passage of the positively charged particles, respectively from a first layer of a first scintillation material and a second layer of a second scintillation material at two respective layer depths, where the first wavelength range differs from the second wavelength range; (4) determining residual energies of the positively charged particles, using output from the step of detecting; and (5) relating the residual energies to body densities to generate an image.

The invention relates to a method for preparing steaming pressure aeroconcrete by skarn type mine tailings, which belongs to the field of ore mine environment protection and the field of building materials and comprises following ingredients in percentage by weight: 25 to 45 percent of skarn type mine tailings, 25 to 35 percent of water quenching blast furnace slag, 15 to 30 percent of silica sand, 6 to 12 percent of cement clinker, 3 to 6 percent of natural gypsum, water reducing agents accounting for 0.6 to 0.9 percent of the total mass of the mixed dry materials, 0.06 to 0.12 percent of aluminum powder and 35 to 45 percent of warm water at the temperature between 48 and 55 DEG C. The aeroconcrete prepared by the invention has the moisture pressure-resistance intensity higher than 3.5 MPa, the absolute dry pressure-resistance intensity higher than 5 MPa and the dry body density between 550 kg/m<3> and 650 kg/m<3>, the requirement of the national standard on the performance indexes of the steaming pressure aeroconcrete can be met, and the invention provides a novel utilization path for the skarn type mine tailing resources with difficult utilization, and is favorable for solving the problems of ground resource occupation and environment pollution of the piling storage of the skarn type mine tailings.

The invention discloses a powder laying technology for a ceramic substrate blank body and further discloses a powder laying system for the ceramic substrate blank body. The powder laying technology comprises the following steps that (1), a uniform adhesion agent film layer is formed on the surface of the ceramic substrate blank body, and a ceramic substrate blank body with the adhesion agent filmlayer is obtained; and (2), an adhesion preventing powder layer is formed on the surface of the ceramic substrate blank body with the adhesion agent film layer, and then a ceramic substrate blank bodysubjected to powder laying is obtained. According to the powder laying technology, an adhesion agent and adhesion preventing powder are implemented independently in two steps, and the situation thatthe adhesion agent forms liquid beads on the surface of the blank body under the effect of tension and thus the adhesion preventing powder is gathered on the surface of the blank body is effectively avoided; the adhesion preventing powder dispersion uniformity and the powder body density uniformity are improved; and meanwhile the adhesion preventing powder which is not laid on the surface of the blank body can be directly recovered for reutilizing, the utilizing rate of the adhesion preventing powder is remarkably increased, and the recovery difficulty of the adhesion preventing powder is reduced. Through the powder laying system, it can be ensured that a powder body on the surface of the ceramic substrate blank body is uniform.