110 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.

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.

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 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 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.

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 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 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%.

The invention relates to the technical field of reinforcing steel bars, and provides a fire-resistant and corrosion-resistant reinforcing steel bar and a preparation method thereof.The fire-resistant and corrosion-resistant reinforcing steel bar comprises a reinforcing steel bar body and a coating, and the reinforcing steel bar body is prepared from, by mass, 0.15%-0.22% of C, 0.3%-0.5% of Si, 0.8%-1.2% of Mn, 0.11%-0.25% of Cr, 0.25%-0.35% of Mo, smaller than or equal to 0.02% of P, smaller than or equal to 0.02% of S, 0.1%-0.15% of Cu, 0.06%-0.1% of Ni, smaller than or equal to 0.08% of Nb, smaller than or equal to 0.06% of Ti and the balance Fe and inevitable impurities; the mass content of Cr, Mo and Cu meets the relational expression that 2Cr + 3Mo + 2Cu is equal to 1.45%-1.55%. By means of the technical scheme, the problem that in the prior art, fire resistance and corrosion resistance of reinforcing steel bars are insufficient is solved.

The invention discloses a carbon dioxide adsorbent as well as a synthesis method and application thereof. The adsorbent comprises zinc oxide, alkali metal salt, a 13X molecular sieve and a binder component, based on the mass of the adsorbent, the content of the zinc oxide is 10%-60%, the mass content of the alkali metal salt is 5%-50%, the mass content of the 13X molecular sieve is 10%-60%, and the mass content of the binder component is 0.05%-10%. The adsorbent disclosed by the invention can greatly improve the utilization rate of an active center in the process of adsorbing carbon dioxide, and shows relatively high activity, cyclic regeneration performance and stability.

The gradient hard alloy comprises a core layer and surface layers, the core layer is located between the two surface layers, each of the core layer and the surface layers comprises a hard phase and a high-entropy binding phase, and the hard phase comprises WC and a cubic phase compound; components of the high-entropy binding phase comprise at least five of first transition metal elements and second transition metal elements, the first transition metal elements comprise at least two of Co, Ni and Fe, the second transition metal elements comprise at least three of Re, Ru, Rh, Pd, Os, Ir and Pt, the mass content of the high-entropy binding phase on the surface layer is 1.0-2.0 times of the nominal mass content, the surface layer is free of cubic phase compounds, and the thickness of the cubic phase compounds is 0.5-1.5 mm. The gradient hard alloy has the advantages of being high in density, free of third phase precipitation and good in alloy performance.

The invention belongs to the technical field of modified polyacrylate resin preparation, and particularly relates to modified polyacrylate resin as well as a preparation method and application thereof.The modified polyacrylate resin is prepared by controlling the mass content of iron element in polyacrylate to be lower than 0.2 ppm, the mass content of dimethylamine in methylamine to be lower than 20 ppm and the acid value of an intermediate product subjected to imidization reaction to be lower than 25 mgKOH / g. The yellowness value of the modified polyacrylate resin is greatly reduced, and the light transmittance of the modified polyacrylate resin is improved.

The invention provides ferrous glycinate and a preparation method thereof, and relates to the field of feed additives, the preparation method of the ferrous glycinate comprises the following steps: mixing ferrous sulfate monohydrate and water, adding glycine, an ethanol solution and an antioxidant, stirring for reaction to obtain the ferrous glycinate, the mass content omega1 of free glycine in the ferrous glycinate is less than or equal to 0.89%, and the mass content omega2 of free glycine in the ferrous glycinate is less than or equal to 0.89%. The ferrous mass content omega 2 of the ferrous glycinate is greater than or equal to 21.35%. The content of free glycine in the prepared ferrous glycinate is less than or equal to 0.89%, that is, the content of free glycine in the product is small, the reaction of the raw materials is complete, the reactivity of the raw materials is good, and the conversion rate is high. Moreover, the antioxidant serving as a reaction raw material is beneficial to maintaining redox balance of a reaction system, reducing side reactions caused by out-of-control redox reaction, protecting ferrous ions from being oxidized, ensuring the content and stability of ferrous ions in the product, and being beneficial to improving the purity and yield of the product ferrous glycinate.

To provide an optical glass in which the increase in the partial dispersion ratio Pg,F is suppressed and the specific gravity is low, as well as an optical element made of the optical glass. [Solution] The SiO2 content is 10.0 to 40.0 mass%, the Li2O content is greater than 0.0 mass% and 15.0 mass% or less, the Nb2O5 content is 10.0 to 40.0 mass%, the B2O3 content is greater than 0.0 mass% and 7.0 mass% or less, the ZnO content is 5.0 mass% or less, the TiO2 content is 13.0 mass% or less, the mass ratio of the total content of Na2O and K2O to the Li2O content [(Na2O+K2O) / Li2O] is 1.50 or less, and the total content of Li2O, Na2O, and K2O R Optical glass having a total content of La2O3, Gd2O3, Y2O3, and Yb2O3 relative to 2O, with the total mass ratio of Re2O3 to the total content of MgO, CaO, SrO, and BaO, R'O [(Re2O3+R'O) / R2O] being 0.79 or less, a total mass ratio of the above total content of R2O to the total content of ZrO2 relative to the total content of SiO2 and B2O3 [(R2O+ZrO2) / (SiO2+B2O3)] being 0.50 or more, and a total content of BaO and La2O3 [BaO+La2O3] being 5.0% by mass or less.

The application provides a high-transparency biodegradable material and a preparation method and application thereof, the high-transparency biodegradable material comprises 90-99.9 parts of biodegradable polyester and 0.01-5 parts of talc by weight; the particle size of the talc is 0.4-2.5 microns; and the mass content of magnesium element in the talc is 14.5-20.5%. In the application, the high-transparency biodegradable material has high light transmittance, low haze, good strength and toughness, and can be used for preparing agricultural mulching films and effectively improving the soil warming effect.

The application discloses a kind of super early-strength phosphogypsum self-leveling mortar, including water and powder, powder is composed of the following weight parts of raw materials: phosphorus building gypsum 1280~1300 parts, silica powder 0~13 parts, water reducing agent 2.25~7.0 parts, retarder 2.5~3.5 parts, defoaming agent 0.4~0.52 parts, cellulose ether 0.30~0.45 parts, thixotropic agent 0.3~0.4 parts, grey calcium 0~30 parts, by high dosage phosphorus building gypsum, its mass content is greater than 96%, can be a large amount of phosphogypsum, improve the disposal of phosphogypsum, beneficial to waste resource comprehensive utilization, reduce carbon emissions. The obtained phosphogypsum self-leveling mortar, 1d compressive strength is greater than or equal to 20MPa, its mortar water content is low, early strength is high, can realize continuous construction, save the overall construction time of project, reduce construction cost. At the same time, through low water-binder ratio, mortar internal density, under the premise of not internal doping waterproof agent, softening coefficient is greater than or equal to 0.6.

The invention discloses an environment-friendly gold extraction agent which comprises the following raw materials: sodium cyanurate, sodium sulfate, sodium citrate and iron carbide. Wherein the mass content of sodium cyanurate is 65%-75%, the mass content of sodium sulfate is 15%-25%, the mass content of sodium citrate is 5%-9%, and the mass content of iron carbide is 1%-5%; the method has the advantages that the leaching rate is high, and meanwhile, the safety and environmental hidden dangers in the transportation, storage or use process can be reduced.

The invention belongs to the field of egg product processing, and particularly provides an online combined monitoring method for the ratio of eggs added with salt or sugar liquid. According to the method, on-line monitoring is carried out on the conductivity and the pH value of the proportioned liquid eggs with different egg yolk mass contents under the condition of adding salt or sugar through an advanced monitoring means so as to monitor whether the proportion of the liquid egg product is qualified or not. According to the method, a conductivity meter and a pH meter are used as core monitoring elements, and conductivity data, temperature data and pH value data of the liquid egg can be collected in real time. According to the method, data collected by a conductivity meter and a pH meter are used, and based on a yolk mass content-conductivity-temperature-pH value relation model, a yolk mass content-temperature-pH value-salt concentration relation model and a yolk mass content-temperature-conductivity-sugar concentration relation model, the collected data are input into the relation models for calculation. When salt or sugar is added into the liquid egg, the mass content of the yolk in the matched liquid egg can be accurately calculated through the relation models, and then the proportion of the egg white liquid to the yolk liquid can be accurately monitored. The method not only overcomes the influence of sugar addition, salt addition and temperature addition on the monitoring result, improves the precision of real-time online monitoring of the liquid egg ratio, ensures the quality of the liquid egg product, but also can ensure real-time dynamic monitoring, eliminates unqualified products in time, and improves the quality of the liquid egg product. And a feedback signal is provided for the adjustment of a front-end control system, so that the control system corrects the matching error in time. The invention provides an efficient and accurate liquid egg proportion online monitoring method which is particularly suitable for liquid egg production under the condition of adding salt or sugar.

The invention relates to a coking coal ash composition control method based on partial least squares, which comprises the following steps: collecting n coal ash samples, detecting the mass contents of SiO2, Al2O3, Fe2O3, CaO, MgO, Na2O, K2O, TiO2, P2O5 and MnO2 in the components of each coal ash sample, generating an n * 10 independent variable matrix X, detecting the CSR value of each coal ash sample, and generating an n * 1 dependent variable matrix Y; standardizing the independent variable matrix X and the dependent variable matrix Y, and marking the standardized matrixes as Xs and Ys; constructing a latent variable regression model; training the regression model, and evaluating the performance of the trained regression model; screening the first four important components according to the VIP values; defining a sample set of target range CSR values; and calculating the total amount of coal ash components with the top four VIPs of each target range CSR sample. The control range of the coal ash components is determined through VIP analysis and statistical process control.