169 results about "Mass content" patented technology

The invention relates to the technical field of preparation of silicon carbide ceramics, in particular to an in-situ reaction sintered silicon carbide ceramic and a preparation method thereof.The preparation method comprises the following technological stages which are conducted in sequence: S1, preparation of silicon carbide slurry, specifically, organic matter precursor raw materials are weighed according to the mass content percentage to form the silicon carbide slurry; s2, vacuum grouting: injecting the silicon carbide slurry in the vacuum grouting tank into the shaping mold from the bottom of the shaping mold to form a silicon carbide green body; and S3, in-situ reaction sintering is conducted, specifically, the silicon carbide green body is placed in a sintering furnace, heating, heat preservation and cooling are conducted on the silicon carbide green body in the argon atmosphere through a segmented temperature control technology, and the silicon carbide ceramic is obtained. The silicon carbide ceramic prepared by the method disclosed by the invention has relatively high density and excellent mechanical properties.

A method for inverting true mass content of water ice in lunar soil using a lunar soil water molecule analyzer (LSWMA) includes: obtaining weight data of a lunar soil sample, temperature data of a sample receiving container that receives the lunar soil sample, and duration of a transfer process of the lunar soil sample; obtaining measurement data of total pressure of the water vapor; calculating a sublimation loss based on a sublimation rate and the duration of the transfer process, and estimating a relative sublimation loss rate; correcting the measurement data of the total pressure of the water and obtaining true pressure data of the water vapor; and calculating, based on the true pressure data of the water vapor, mass of the water vapor, and further calculating mass content of water ice in lunar soil.

This invention relates to the field of iron and steel smelting technology, and proposes a method for improving the sintering uniformity of sintering mixtures. The method includes: preparing a first mixture for laying on the lower layer of a sintering machine trolley, and a second mixture for laying on the upper layer thereon, wherein the mass percentage of the first mixture is higher than that of the second mixture, the mass content of fixed carbon in the first mixture is lower than that in the second mixture, and the mass percentage of limestone in the flux used in the first mixture is higher than that in the second mixture; the first mixture is firstly distributed at the head of the sintering machine, and then the second mixture is secondly distributed at the head of the sintering machine; after the distribution is completed, sintering is performed by suction ignition. This invention improves the uniformity of strength and yield between the upper and lower layers of sintered ore, and increases sintering production efficiency.

The application provides a method for detecting the content of sodium hypochlorite in chicken, and belongs to the technical field of quantitative detection. Terahertz spectrum testing is performed on a dried chicken sample to obtain the peak height of a sodium hypochlorite characteristic peak; then, according to a standard curve and the peak height of the sodium hypochlorite characteristic peak, the content of sodium hypochlorite in the chicken is obtained; the frequency of the sodium hypochlorite characteristic peak is 1.10 THz or 1.25 THz; and the standard curve is a fitting curve of the mass content of sodium hypochlorite in the chicken and the peak height of the sodium hypochlorite characteristic peak. Different molecules exhibit different absorption peaks in terahertz absorption spectrum, and the application detects the content of sodium hypochlorite in chicken by using a terahertz spectrum method, and obtains the content of sodium hypochlorite in chicken by using the fitting relationship between the peak height of the sodium hypochlorite absorption peak and the content of sodium hypochlorite. The method provided by the application is simple, and can quickly and accurately obtain the content of sodium hypochlorite in chicken.

This invention relates to the field of catalytic cracking catalyst preparation, and discloses a catalytic cracking catalyst, its preparation method, and its application. The catalytic cracking catalyst comprises a molecular sieve, a binder, and clay; based on the total mass of the catalyst, the mass content of the molecular sieve is 60-85%, the mass content of the clay is 5-20%, and the mass content of the binder is 10-35%; the mesopore size of the catalyst is 3-50 nm; in the catalyst, the volume of mesopores with a pore size of 6-10 nm accounts for 8-30% of the total mesopore volume; in the catalyst, the volume of mesopores with a pore size of 30-35 nm accounts for 10-30% of the total mesopore volume. This catalyst exhibits excellent catalytic performance and, when applied to catalytic cracking reactions, especially naphtha catalytic cracking reactions, demonstrates high conversion rates and low-carbon olefin yields.

The present application relates to the technical field of solid lubricant, and particularly relates to a lubricant particle, which comprises a solid lubricant and a binder, the solid lubricant comprises natural graphite, molybdenum disulfide, hexagonal boron nitride and silicon dioxide; the mass content of the natural graphite is 5% to 20% based on the total mass of the solid lubricant, the mass content of the molybdenum disulfide is 5% to 20%, the mass content of the hexagonal boron nitride is 5% to 20%, and the mass content of the silicon dioxide is 40% to 85%. The lubricant particle of the present application can replace the existing powder solid lubricant to solve the problem that the powder solid lubricant is added into the metal binder, is dispersed and distributed in the carcass, hinders the combination of metal elements, and the lubricants are connected and bridged, further hindering the combination of metal elements.

The invention provides a method for determining the floating content of a binder of a negative plate and application. The method comprises the following steps: acquiring a first weight loss ratio a0 of a negative electrode material at a first position of the negative plate in a target temperature interval; adding the negative electrode material at the first position into a target solvent for reflux, and then filtering and drying to obtain a solid substance; obtaining a second weight loss ratio a1 of the solid substance in the target temperature interval; obtaining a third weight loss ratio x1 of the binder standard substance and a fourth weight loss ratio x3 of the thickener standard substance; obtaining a first actual mass content of the binder based on a0, a1, x1 and x3; and obtaining the floating content of the binder based on the first actual mass content and the designed mass content of the binder. According to the method for determining the floating content of the binder in the negative electrode plate, the actual content of the binder in the negative electrode material at any position in the negative electrode plate can be quantitatively analyzed, and then the floating content of the binder is obtained by combining the design content of the binder.

The present application belongs to the technical field of tribology, and provides a kind of lubricating oil system and its preparation method and application, oil-based super-slippery system.The lubricating oil system provided by the present application includes base oil and oil-soluble copper-based nanoparticle;The mass content of oil-soluble copper-based nanoparticle in the lubricating oil system is 0.01-5.0%.The oil-soluble copper-based nanoparticle in the lubricating oil system provided by the present application can improve the load capacity and anti-wear and friction-reducing performance of base oil as an additive;At the same time, under the action of frictional shear, the oil-soluble copper-based nanoparticle in the lubricating oil system provided by the present application can play a role in friction catalysis, promote the formation of high-performance carbon-based material, i.e., "the third body", in the friction interface and lubricating oil, thereby reducing the friction coefficient between polymer-metal pair to 10 ‑3 order of magnitude, and super-slippery phenomenon occurs, and the wear rate is at 10 ‑8 -10 ‑9 mm 3 / Nm level, reaching near-zero wear state.

The invention provides a low-GI biscuit raw material composition which comprises the following components in parts by weight: 0.1-0.6 part of nanocrystallized bamboo fiber cell walls, the nanocrystallized bamboo fiber cell walls are extracted from bamboo green, are edible and have one-dimensional characteristics, the transverse size is below 100nm, the longitudinal size is above 1mu m, cellulose in the nanocrystallized bamboo fiber cell walls has the crystallinity of 80%-95%, and the grain size of the cellulose in the nanocrystallized bamboo fiber cell walls is 100 nm. The dispersion liquid of the nanocrystallized bamboo fiber cell walls in water has the viscosity of 200 Pas or above when the mass concentration of the dispersion liquid is 0.5%, 40-70 parts of low-gluten flour, 20-35 parts of whole wheat flour, 8-20 parts of grease selected from natural butter, coconut oil or non-hydrogenated vegetable butter and 10-25 parts of sugar substitutes, and the sugar substitutes comprise at least one of erythritol and maltitol; the total mass content of the dietary fibers is greater than or equal to 15%. The beverage has a high low-GI effect, a suitable taste and good crush resistance. Methods of making low GI biscuits and low GI biscuits are also provided.

The application provides a thermal infrared hyperspectral characteristic wave band selection method based on an improved particle swarm algorithm, and comprises the following steps: step 1, preparing a mixed salt ore sample, collecting a hyperspectral emissivity spectrum of the mixed salt ore sample, measuring the mass content percentage of each mixed salt mineral in the mixed salt ore sample as a data set for selecting a characteristic wave band and predicting a content; step 2, taking the data set in step 1 as input, and establishing a prediction model of a characteristic wave band combination of each substance in the mixed salt ore and corresponding content prediction based on the improved particle swarm algorithm; step 3, based on the prediction model in step 2, predicting the characteristic wave band combination of each substance in the unknown mixed salt ore and the corresponding content, collecting the content percentage of the mixed salt ore and verifying the result. The improved particle swarm algorithm does not need to artificially adjust the parameters of the algorithm, and the obtained wave band combination prediction result is stable.

The invention discloses a catalyst for preparing 1, 3-propylene glycol through glycerol hydrogenation and a preparation method and application of the catalyst. The catalyst comprises a carrier, an active component loaded on the carrier and an auxiliary, the active component is Pt, a phosphide of Pt and a phosphide of W, and the auxiliary agent is La or Ba; according to the weight ratio of 100%, the loading capacities of the Pt, the W, the phosphorus and the auxiliary agent are respectively as follows according to the mass content of the carrier: 1-4% of Pt, 3-15% of W, 0.1-5% of phosphorus and 0.1-0.8% of the auxiliary agent. The catalyst is high in stability, is suitable for hydrogenation production of 1, 3-propylene glycol from a glycerin aqueous solution, is high in product selectivity and yield, can reduce the components of the catalytic reaction, is mild in reaction conditions, meets the requirements of green chemical industry, and has great economic values and industrial application prospects.

The invention discloses a design method for improving corrosion resistance of a copper-nickel alloy by adding alloy elements. The design method comprises the following steps: screening the alloy elements; the first screening condition is that the solid solubility of the to-be-added alloy element in the copper-nickel alloy is larger than 0.1 wt.%, the second screening condition is that the standard electrode potential of the to-be-added alloy element is smaller than that of Ni, the third screening condition is that the deposition line of the to-be-added alloy element is lower than that of Cu2O, and the fourth screening condition is that the to-be-added alloy element is non-noble metal; based on the screening result, the mass percentage content range of the alloy elements is determined according to the maximum solid solubility of the alloy elements in the copper-nickel alloy; the ratio of the nucleation rate to the growth rate is larger than 104, and the corrosion rate is stabilized to be not higher than 0.02 [mu] m / a along with time, and the mass content of the alloy elements is obtained through optimization; and the final components and content of the added alloy element copper-nickel alloy are determined on the basis of the optimization result, and the corrosion resistance of the alloy element copper-nickel alloy is verified through experiments. The invention provides a design thought for the corrosion-resistant alloy with slowly dissolved main elements.

The application discloses a HIPS alloy material and a preparation method and application thereof, and belongs to the technical field of high polymer engineering plastics. The HIPS alloy material comprises the following components in parts by mass: 58-82 parts of HIPS resin, 18-42 parts of ASA glue powder, 10-18 parts of phosphorus flame retardant, 3-9 parts of nitrogen flame retardant, 4-12 parts of hollow glass microbead and 1-9 parts of compatibility agent. The mass content of acrylate in the ASA glue powder is 53-66%. The average particle size of the hollow glass microbead is 38-82 mu m. The HIPS alloy material provided by the application has excellent flame retardance and mechanical properties. The preparation method is simple and is beneficial to actual production.

The invention relates to the technical field of mineral resources, in particular to a comprehensive assessment method for miscellaneous ores, which comprises the following steps: establishing a sinter cup test database, dynamically updating mineral powder variety and performance data, taking uniform samples of miscellaneous ores to be assessed with the weight not less than 500g, dividing into 3 parts, respectively detecting miscellaneous ore iron grade, harmful element mass content and impurity mass content for the 3 parts of samples, the iron grade score, the harmful element score and the impurity score of the corresponding sample are calculated, comprehensive evaluation calculation is carried out according to the formula that the comprehensive score = (A * T1) + (B * T2) + (C * T3), A is the iron grade score of the first sample, and T1 is the weight of the iron grade score; b is the score of the harmful element of the second sample, and T2 is the weight of the score of the harmful element; c is the impurity score of the third sample, and T3 is the weight of the impurity score; one-sided evaluation is avoided, the use demonstration period of some mineral powder is effectively shortened, the situation that the best purchase opportunity is missed due to uncertain factors such as the market and indexes is avoided, and the purchase cost is reduced.

The invention belongs to the technical field of polypropylene preparation, and particularly relates to a propylene polymer, a preparation method thereof and a polypropylene composition. The propylene polymer is characterized in that the propylene polymer comprises a propylene homopolymer as a matrix, and the content of the propylene homopolymer is greater than or equal to 99 wt%; the composition comprises a polymer nucleating agent, and the mass content of the polymer nucleating agent is 1-1000 ppm; the matrix comprises 0.1 wt%-10.0 wt% of ultra-high molecular weight components with the molecular weight M greater than or equal to 10,000,000; m < z + 1 > of the propylene polymer is greater than or equal to 6000 * 10 < 3 >, and M < z + 1 > / Mn is greater than or equal to 100. The propylene polymer provided by the invention has both processability and mechanical properties, and the rigidity and toughness of the mechanical properties are remarkably improved at the same time.

Dry mortar composition, in particular adhesive mortar. The invention relates to a dry mortar composition, preferably adhesive mortar, having an uncompacted density between 900 g / L and 1400 g / L and comprising at least one air-entraining agent at a mass content between 0.1% and 2%. The invention also relates to a wet mortar obtained from mixing this dry mortar composition, as well as a method for fixing tiles to a substrate using this dry mortar composition.

The application discloses a high-strength dual-phase steel with excellent low-temperature toughness and corrosion resistance and a production method thereof, and belongs to the technical field of steel rolling production. The chemical composition and mass content of the dual-phase steel are as follows: C: 0.06-0.12%, Si: 0.15-0.4%, Mn: 1.8-2.5%, Cr: 0.3-0.6%, Nb: 0.015-0.03%, Mo: 0.20-0.25%, Cu: 0.2-0.4%, Ni: 0.3-0.8%, Ti: 0.008-0.018%, N: 0.0030% or less, P: 0.025% or less, S: 0.002% or less, and the balance of Fe and inevitable impurity elements. The production method comprises a slab heating, rolling and continuous annealing process. The obtained dual-phase steel has uniform ferrite and martensite structures, good strength and toughness matching, and excellent low-temperature toughness and corrosion resistance.

The invention relates to the field of aluminum oxide preparation, and discloses modified aluminum oxide as well as a preparation method and application thereof. The modified aluminum oxide comprises aluminum oxide, a first modified component and a second modified component; the first modified component is selected from at least one of IVB group metal elements; the second modified component is a sulfur element; the mass content of the first modification component is 0.01-5% and the mass content of the second modification component is 0.1-5% by element on the basis of the alumina dry basis weight of the modified alumina. The catalyst prepared by using the modified alumina as the carrier is used in the field of catalytic reforming, especially in the field of naphtha catalytic reforming, and has high reaction activity and aromatic hydrocarbon selectivity.

The invention discloses a wastewater treatment method and system, and the treatment method comprises the following steps: carrying out first concentration crystallization treatment on wastewater to obtain a concentrated treatment solution, carrying out solid-liquid separation treatment on the concentrated treatment solution to obtain ammonium sulfate and a first mother solution, and monitoring the specific gravity of the first mother solution and the mass content of phosphorus in the first mother solution, the wastewater comprises NH4 < + >, SO4 < 2-> and PO4 < 3->; when the specific gravity of the first mother liquor and the mass content of the phosphorus element meet first preset values, carrying out second concentration and crystallization treatment on the first mother liquor to obtain ammonium dihydrogen phosphate and second mother liquor; when the specific gravity of the first mother liquor and the mass content of the phosphorus element do not meet the first preset value, mixing the first mother liquor with the wastewater, and then carrying out first concentration crystallization treatment. According to the treatment method, the impurity content in ammonium sulfate can be reduced, the added value of byproducts is improved, and the economic benefit of wastewater treatment is improved.

The invention relates to a special SEBS (styrene-ethylene-butylene-styrene) material for toughening polypropylene, a preparation monomer of the special SEBS material comprises styrene and butadiene, the molecular weight of the special SEBS material is 8.9-11.3 * 10 < 4 >, and in the special SEBS material, the mass content of a styrene chain segment is 13-50%, and the mass content of a 1, 2 structure chain segment of butadiene is 20-65%. According to the present invention, the SEBS structure is specifically designed, such that the room temperature impact strength and the low temperature impact strength of the PP are effectively improved, and the low room temperature shrinkage rate is provided; when the material is used for toughening polypropylene, excellent balance of high rigidity and high toughness of PP can be realized only by using a small amount of SEBS special material; the toughness of homo-polypropylene resin and co-polypropylene resin can be effectively improved, high rigidity can be kept, and meanwhile the preparation method of the polypropylene composite material is simple, efficient, simple in technological process and relatively low in cost.

The embodiment of the invention provides martensitic steel, a preparation method of the martensitic steel, a structural part and terminal equipment. The martensitic steel comprises the following elements in percentage by mass: 7%-9% of Ni, 16%-18% of Co, 5%-8% of Mo, 7%-9% of Cr, 0.1%-0.6% of Nb and 0.03%-0.12% of C, and Fe and other trace elements. Due to the specific elements and the mass ratio of all the elements in the martensitic steel, the martensitic steel can be produced through powder forming technologies such as metal injection forming, and the martensitic steel produced through the powder forming technology can also have high strength and excellent toughness.

The application discloses a high-surface-quality 980MPa-grade hot-dip galvanizing DH steel and a preparation method thereof. The main chemical component mass content of the hot-dip galvanizing DH steel is as follows: C: 0.17-0.21%, Si: 0.4-0.7%, Mn: 1.8-2.2%, Nb: 0.01-0.02%, Ti: 0.01-0.02%, Cr: 0.4-0.5%, and Als: 0.14-0.9%. The method adopts low-carbon design and high-dew-point annealing process to produce the hot-dip galvanizing steel plate which meets the low-carbon environmental protection requirement and has high surface quality, so as to meet the urgent needs of the market. The high-dew-point annealing process is a new type of annealing technology, the oxygen partial pressure is increased by increasing the dew point, the Si and Mn element internal oxidation is realized, and thus the plating leakage defect is effectively improved, and the surface smoothness and flatness of the steel plate are improved.

The invention discloses a method for detecting the content of mica in fine aggregate, and belongs to the technical field of concrete raw material detection. The method comprises the following steps: S1, preparing an SEM sample sheet: preparing an epoxy resin block embedded with fine aggregate, and carrying out mirror polishing treatment on the surface of the epoxy resin block to prepare the SEM sample sheet; step S2, image acquisition; s3, preliminarily screening mica particles; s4, secondary screening of mica particles; s5, screening the mica particles for the third time; s6, mica content calculation: calculating the volume content and the mass content of mica particles in the fine aggregate. SEM sample slices are prepared according to the steps of drying, screening, sample inlaying, mirror polishing and the like, and human errors are prevented from being introduced; the mica particles in the SEM sample slice image are identified and screened by adopting three modes, so that the comprehensiveness and the accuracy of the mica particle detection mode are improved, and the accuracy and the reliability of the mica content detection result are further improved.

The invention provides application of homogenization heat treatment in reducing or preventing generation of fine cracks and / or cracking in the rolling process of B-containing stainless steel. The temperature of the homogenization heat treatment is 1180 to 1200 DEG C; and the mass content of B in the B-containing stainless steel is 0.010%-0.040%. The invention provides the corresponding preparation method of the B-containing stainless steel, aiming at heat-resistant steel in which more BN inclusions are formed in the electroslag remelting process, through homogenization heat treatment before rolling, a BN precipitated phase is molten back, so that the BN content in a steel billet is reduced, the risk that the steel generates fine cracks or cracks in the subsequent rolling process is prevented, and the quality of the steel is improved. Therefore, the flaw detection qualification rate of the steel billet and the comprehensive mechanical property of the steel billet subjected to quenching and tempering heat treatment are improved.

This slab is a slab of high-Al steel containing C: 0.02 mass % to 0.50 mass % and Al: 0.20 mass % to 2.00 mass %, in which, in a case where [Zr], [Ti], [Al], and [N] each represent a content (mass %) in the slab, a Zr content and a Ti content satisfy a relationship of [Zr]+0.2×[Ti]≥4 / 3×[Al]×[N], and the Zr content satisfies a relationship of 0.0010 mass %≤[Zr].

BUILDING AND METHOD OF BUILDING CONSTRUCTION A building (1) comprises a support (4) with anchor points (3) and first building modules (2a) equipped with a floor (5) attached to first side walls (7a). The first building modules (2a) have a non-load-bearing ceiling (6) or no ceiling. The first side walls (7a) are made of a mixture comprising a mineral binder and particles of a plant material embedded in the mineral binder. The mass content of particles is between 30% and 70%. The first building modules (2a) are supported by the support (4) solely by means of a load-bearing support between the first side walls (7a) and the support (4). First fixing plates (8a) are attached to the top of the first side walls (7a). The first tie rods (9a) connect the first fixing plates (8a) to the anchor points (3) to apply a vertical compressive force.

The invention relates to the technical field of stainless steel, and provides a stainless steel bearing for a rotor spinning machine, which comprises the following bearing materials in percentage by mass: 0.19 to 0.23 percent of C, 0.25 to 0.35 percent of Si, 0.25 to 0.45 percent of Mn, 0.6 to 0.8 percent of Cr, 1.4 to 1.6 percent of Ni, 0.2 to 0.3 percent of Mo, 0.015 to 0.05 percent of Al, 0.008 to 0.15 percent of Cu, 0.005 to 0.015 percent of Ce, 0.008 to 0.012 percent of N, less than or equal to 0.01 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.0006 percent of Ca, less than or equal to 0.0015 percent of Ti, less than or equal to 0.002 percent of O, 0.0024 to 0.0075 percent of La, 0.0008 to 0.004 percent of Ce, 0.0015 to 0.0088 percent of Nd and the balance of The mass contents of La, Ce and Nd meet the relational expression: 5La + 2Ce + 3Nd = 0.01%-0.08%. According to the technical scheme, the problem that a stainless steel bearing in the prior art is insufficient in strength and toughness is solved.

The invention relates to a phosphorus-modified FER structure molecular sieve, which is characterized in that the mass content of phosphorus is 0.1-10% based on phosphorus pentoxide; after the molecular sieve is washed with water at 70 DEG C for 2 hours, the phosphorus content retention rate is not less than 60%, and the phosphorus content retention rate is defined as P2O5 after washing / P2O5 before washing in percentage by mass; the molecular sieve is obtained by contacting and dipping an FER structure molecular sieve with an aqueous solution of a phosphorus-containing compound of which the valence state of phosphorus is + 1 valence, drying, and roasting at 300-400 DEG C.

The present application relates to the field of blast furnace smelting technology, and proposes a vanadium-titanium magnetite blast furnace smelting method, which comprises: adjusting the burden structure and the ore grade in the blast furnace smelting process to obtain a slag with a mass content of TiO2 of 23.5-24.5%, and produce molten iron and pig iron; controlling the mass content of MgO in the slag to be 7-9%, the mass content of Al2O3 to be 13.5-15%, the slag basicity R2 to be 1.06-1.10 times, and R3 to be 1.38-1.42 times to optimize the fluidity of the slag; controlling the oxygen enrichment rate of the blast furnace to be 4.0-6.0% to make the mass content of Ti(CN) in the slag less than 0.5% and reduce the deterioration of the fluidity of the slag; and controlling the temperature of the molten iron to be 1430-1460 DEG C to make the mass content of titanium in the pig iron be 0.18-0.28% to optimize the separation of slag and iron. The present application realizes that the blast furnace can maintain stable and efficient smelting when the mass content of TiO2 in the slag is 23.5-24.5%.

The present invention relates to a composition comprising a peptide fraction, wherein: the peptide fraction comprises cysteine and methionine; the mass content of methionine of the peptide fraction is greater than 1% relative to the total amino acids of the peptide fraction; the cysteine of the peptide fraction is at least partially sulfonated, the degree of sulfonation of the cysteine being greater than 50%, preferably greater than 70%, and even more preferably greater than 80%.