30results about How to "Slurry stabilization" patented technology

The invention discloses a graphene / UHMWPE composite fiber and a preparation method thereof. In the composite fiber, the content of graphene is 0.05-5 wt% of that of UHMWPE. The preparation method comprises: pre-dispersing graphene in a solvent to form a uniform graphene dispersion liquid, fully dissolving UHMWPE powder in a solvent in a heating condition, fully mixing the obtained solution with the obtained graphene dispersion liquid, spinning the fully-mixed UHMWPE / graphene mixed solution through a gel-spinning method, and performing solvent extraction and drawing to obtain the graphene / UHMWPE composite fiber. The prepared graphene / UHMWPE composite fiber is obviously improved in the mechanical strength. The tensile strength can reach 29 cN / dtex, and the tensile modulus can reach 1300 cN / dtex. Through changing the addition ratio of graphene and UHMWPE powder, the size of graphene and different dispersion processes, the mechanical property of the composite fiber can be regulated.

The invention relates to a method for preparing sizing agent for sizing textile chaine in textile industry. The method for preparing composite textile pulp by nanometer polymer emulsion is characterized by comprising the following steps: 1) preparation of polymer emulsion: according to the mixture ratio of 10 milliliters: 0.3 to 0.8g:0.2 to 0.5 g:60 to 100 milliliters of alkene monomer to emulsifying agent to initiating agent to water, the components are selected and mixed and then are stirred for 6 to 10 hours at the temperature from 75 to 85 DEG C so as to obtain the polymer emulsion; 2) according to the mixture ratio of 10 milliliters: 0.2 to 0.8 g: 0.3 to 0.9g:1.0 to 3.0 g:25 to 80 g of alkene monomer to paraffin to sodium hexametaphosphate to nanometer silicon dioxide to modified starch, the paraffin, the sodium hexametaphosphate, the nanometer silicon dioxide and the modified starch are selected for standby use; and the polymer emulsion, the paraffin, the sodium hexametaphosphate, the nanometer silicon dioxide and the modified starch are mixed and then react for 2 to 4 hours at the temperature from 75 to 85 DEG C, thereby obtaining the composite textile pulp by nanometer polymer emulsion. The method has the advantages of low cost and environmental protection.

The invention relates to the technical field of ceramic materials, and provides a high thermal conductivity aluminum nitride ceramic and a preparation method thereof. The preparation method includes the following steps: (1) primary ball milling; (2) calcination; (3) secondary ball milling; (4) (5) Tape forming; (6) Isostatic pressing; (7) Debinding; (8) Hot pressing and sintering to obtain aluminum nitride ceramics with a thermal conductivity of 200-230W / (m·K ), the flexural strength is 470-540MPa, and the bulk density is 3.3-3.5g / cm, which solves the problem that the existing aluminum nitride ceramics only have outstanding performance in one aspect such as thermal conductivity and strength, and cannot take into account all aspects of performance at the same time. question.

The invention discloses a densifier and an ultra-high-density cement slurry based on the densifier. The weight composition of the densifier is: 80-90 parts of iron ore powder, 5-10 parts of manganese ore powder, and 5 parts of G-grade superfine cement. -10 parts, microsilica fume 5-10 parts. The ultra-high-density cement slurry provided by the invention has stable performance, low water loss, certain anti-air channeling ability, relatively ideal thickening transition time and can form cement stone with strong strength. It can effectively control high-pressure oil and gas layers, avoid oil and gas escape, and better improve the quality of cementing.

The invention discloses an ultrafine inorganic grouting material for tunnel inverted arches. The grouting material comprises, by mass, 75-90% of an ultrafine cementing material, 5-20% of a mineral filler, 2.5-7.5% of a composite expansion agent, 0.04-0.08% of a fluid volume stabilizer, 0.5-1.5% of a film forming modifier, 0.4-0.8% of a water reducer, 0.02-0.05% of a defoamer, 0.1-0.4% of a dispersant, 0.05-0.1% of an anti-seepage water repellent and 1-5% of a nano-reinforcing component. Above components are uniformly mixed, water is added according to a water-cement ratio of 0.25-0.30, and stirring is performed to obtain the grouting material which can be used for grouting reinforcement portions and defect parts of the tunnel inverted arches. The inorganic grouting material obtained in theinvention is suitable for repairing and stabilizing defects and dangerous rock bodies of tunnel inverted arches at 5-35 DEG C, has the advantages of high fluidity, high bonding strength, no shrinkage, good impermeability and good durability, and is suitable for being promoted and applied.

The invention discloses a preparation method of a molecular sieve type monolithic catalyst. The preparation method of the molecular sieve type monolithic catalyst has the advantage that the purposes of improving the activity of the catalyst and widening the temperature window of the catalyst are achieved by combining a plurality of molecular sieve active coatings on a catalyst due to the adoption of different activities of different molecular sieve type catalysts in NOx selective catalytic reduction reaction. The preparation method of the molecular sieve type monolithic catalyst comprises the following steps: preparing Fe modification ZSM-5 molecular sieves and NH4-ZSM-5 molecular sieves into corresponding slurries, then respectively coating the slurries on one end of a cordierite honeycomb ceramic carrier to prepare a molecular sieve type monolithic catalyst applied to selective catalytic reduction of nitric oxides. The catalyst prepared by the method has high activity of selective catalytic reduction of nitric oxides; the performance of the catalyst is superior to that of the molecular sieve type monolithic catalyst which only takes the Fe modification ZSM-5 molecular sieves and the NH4-ZSM-5 molecular sieves as active coatings; the conversation rate of NOx in a temperature zone of 190-490 DEG C can reach over 80%; and the catalyst is simple in preparation method and relatively low in production cost.

The cement permeation promoter for oil and gas well is compounded with gum resin 25~35 wt%, modified aluminum powder 8~12 wt%, asphalt 35~45 wt% and chrysotile fiber 16~24 wt%. It is re-compounded through treating the aluminum powder with water solution of potassium permanganate to deactivate and stoving to obtain modified aluminum powder, and mixing the modified aluminum powder with other components in the said weight proportion to obtain the cement permeation promoter. The cement permeation promoter may be re-compounded with other admixtures to form a new type of permeating cement slurry system, which is cured in the stratum condition to form oil and gas passage with certain permeation rate, high strength, high heat and salt tolerance, oil phase permeation rate higher than water phase permeation rate, stable chemical performance and for cementing well, preventing sand, blocking water, etc.

The invention discloses a cementing method with physical foamed cement, which comprises the steps: the stock solution of a foaming agent and clear water are diluted according to the weight proportion of 1: 10 to 30, stirred evenly, and provided with compressed air with the pressure of 0.2 to 0.6MPa through an air compressor; the pumping rate of a metering pump is set, diluted stock solution of the foaming agent and the compressed air are simultaneously provided for a foam generator in unit time of 20 to 45min so as to cause the stock solution of the foaming agent and the compressed air to form foamed media in the foam generator, the foamed media is input into a cement pump by the driving of the compressed air, and mixed with cement slurry according to the weight proportion of 1: 10 to 30,and finally pumped into a well. The invention changes the technique for preparing cement by the existing chemical foaming method, the foaming process changes into ground foaming from the original well foaming, thus leading the foaming media and the cement mud to be more evenly, the slurry to be stable and the density to be small; and the cementing method is easy to adjust, control and detect.

A process for preparing ceramic sheet (or film) by water-base doctor, blading method includes such steps as proportionally mixing water, ceramic powder, acrylate emulsoid, plasticizer, and filming assistant, stirring, ball grinding, and doctor blading. Its advantages are high drying speed, strength and toughness, and wide application range.

The present invention is a negative-electrode active material comprising negative-electrode active material particles, the negative-electrode active material being characterized in that the negative-electrode active material particles comprise silicon compound particles each containing an oxygen-containing silicon compound, each of the silicon compound particles contains at least one component selected from Li2SiO3 and Li2Si2O5, and each of the silicon compound particles has a peak P attributed to a Li silicate at a position around 1847 eV and also has a peak Q that is gentler than the peak P at a position around 1851 to 1852 eV in an Si K-edge spectrum obtained from an XANES spectrum. It is possible to provide a negative-electrode active material which enables the increase in a battery capacity associated with the improvement in initial efficiency while stabilizing a slurry when used as a negative-electrode active material for a secondary battery.