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46results about How to "Homogeneous structure" patented technology

High-strength, high-toughness, high-heat conductivity and high-impermeability large-volume concrete and preparation method thereof

The invention discloses high-strength, high-toughness, high-heat conductivity and high-impermeability large-volume concrete and a preparation method thereof. The high-strength, high-toughness, high-heat conductivity and high-impermeability large-volume concrete comprises cement, fly ash, silicon powder, steel slag powder, boron nitride, graphene oxide flake powder, sand, gravel, high-strength polyvinyl alcohol fiber, a polycarboxylic acid water reducing agent, a dispersion activator, a modified graphene oxide dispersion and water. The obtained concrete has the initial and 28-day-old heat conductivity of 6.26-7.53W/(m.K) and 9.58-12.73W/(m.K) respectively and has the capability of dispersing and conducting cement hydration heat and resisting temperature cracks caused by environment temperature change; 28-day-old concrete has the compressive strength of 87.6-116.7MPa, the rupture strength of 17.6-19.5MPa, the splitting tensile strength of 11.7-12.6MPa, the bending tensile strength of 12.4-13.8MPa and the bending tensile modulus of 45.7-52.5GPa; the water permeability resistance, the chloride ion permeability resistance, the freeze-thaw resistance and the carbonation resistance reachthe highest levels; and the prepared concrete has good social and economic benefits.
Owner:SHAANXI UNIV OF SCI & TECH

Lithium battery material powder demagnetization device

PendingCN109499755AImproved magnetic field distribution characteristicsAvoid leaningMagnetic separationMagnetic polesMetal
The invention provides a lithium battery material powder demagnetization device. The lithium battery material powder demagnetization device comprises a barrel body, a material separating apparatus anda vibrating apparatus. A first magnetic pole and a second magnetic pole are symmetrically arranged on the two sides of the barrel body, the central connecting line of the first magnetic pole and thesecond magnetic pole is parallel to the horizontal plane, a plane which penetrates through the axis of the barrel body and is perpendicular to the central connecting line is defined as a first plane,at least two magnetic material absorbing layers are arranged inside the barrel body, each magnetic material absorbing layer comprises 2k first metal bars which are arranged in the direction from the first magnetic pole to the second magnetic pole horizontally in sequence, the 2k first metal bars are symmetrically arranged using the first plane as a symmetric plane, gaps which are used for lithiumbattery material powder to pass are formed between the adjacent first metal bars, the first metal bars are made from metal magnetic materials, the first metal bars comprise first lateral sides and second lateral sides, the second lateral sides of the first metal bars all face the first plane, and the first lateral sides are all back to the first plane; and the polarity of the first magnetic pole and the polarity of the second magnetic pole are opposite.
Owner:HUNAN ZHONGKE ELECTRIC

Preparation method and application of carbon molecular sieve for separating olefin and alkane

The invention discloses a preparation method and application of a carbon molecular sieve for separating olefin and alkane. The method comprises the following steps of: adding a starch carbon precursor into a distilled water solvent to prepare a starch aqueous solution, uniformly stirring and dispersing, and then carrying out medium-pressure medium-temperature hydrothermal controllable polymerization and dehydration carbonization reaction in a reaction kettle to obtain homogeneous carbonaceous microspheres; and washing and drying the obtained carbonaceous microspheres, performing controlled high-temperature defunctionalization treatment at 700-1000 DEG C in an inert atmosphere, and controlling carbon layer rearrangement and heteroatom pyrolytic reaction to obtain the carbon molecular sieve material with uniform and adjustable ultra-microporous channels. Starch biomass which is low in price, non-toxic and harmless serves as a carbon source, carbonaceous microspheres are formed through a direct hydrothermal polymerization carbonization process, the defect content and the graphitization degree of the microspheres can be controlled by adjusting the reactant concentration, the carbon molecular sieve is obtained through pyrolysis at a corresponding calcination temperature, and fine adjustment of the aperture within a sub-angstrom precision range is realized.
Owner:SOUTH CHINA UNIV OF TECH
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