10 results about "Crystal cluster" patented technology

The invention relates to the technical field of polypropylene compositions and modified polymer materials thereof, and discloses a high-performance polypropylene-based green energy-saving cable insulation layer composition which comprises an isotactic polypropylene matrix, a maleic anhydride grafted polyolefin elastomer distributed in a dispersed phase and an amide nucleating agent distributed on a non-polar phase interface, an anchoring structure is constructed on a phase interface through hydrogen bond interaction, a matrix molecular chain is induced to grow to form a radial needle-shaped crystal cluster penetrating through the phase interface, and a three-dimensional interpenetrating crystal bridging network is constructed. Through the crystal bridging network, interface deep traps are converted into continuous shallow trap diversion channels, charges are guided to migrate orderly, space charge accumulation is inhibited, and the three-dimensional interpenetrating crystal bridging network is constructed. And the steric effect generated by the interface anchoring structure cooperatively restrains the thermal expansion of the dispersed phase, so that the high-temperature dimensional stability and dielectric property of the material are improved.

The invention discloses a zinc dicarboxylate catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst synthesis. The zinc dicarboxylate catalyst provided by the invention is prepared according to the following method: further reacting an intermediate obtained by reacting dicarboxylic acid with alkali metal hydroxide with zinc salt at constant temperature and low temperature, mixing the obtained mixture with ethanol, filtering, and washing a filter cake to obtain the high-activity zinc dicarboxylate catalyst. The zinc dicarboxylate catalyst with a more regular crystal form is obtained by accurately controlling the temperature and the pH value of a reaction mixture, the catalyst is a large-crystal-cluster rectangular flaky crystal, and the crystal cluster length of the catalyst is obviously larger than that of an existing zinc dicarboxylate catalyst. Meanwhile, the crystal thickness is obviously lower than that of the existing dicarboxylic acid catalyst. The zinc dicarboxylate catalyst disclosed by the invention shows very high catalytic activity in the process of catalyzing a CO2-epoxide copolymerization reaction.

The invention provides composite stirring crystallization equipment for producing macloxvir, and belongs to the technical field of crystallization stirring equipment. Comprising a stirring tank, and a main stirring structure is arranged in the stirring tank. Through the main stirring structure and the rotating speed adjusting structure, a plurality of large-size main shearing wheels serve as main stirrers and are responsible for macroscopic circulation of a tank body to prevent the local saturation from being too high or too low, and a plurality of small-size small shearing wheels are arranged below a feeding hopper; when the rotating speed is high, seed crystals or anti-solvents added during processing can be quickly dispersed, so that the seed crystals or the anti-solvents are uniformly nucleated, or overlarge crystal clusters are crushed, and through the cooperation of the two structures, on the premise of sufficient mixing, nucleation or non-uniform growth caused by insufficient mixing of a single stirrer can be avoided; according to the method, the problems of crystal breakage or excessive secondary nucleation caused by excessive shearing or too strong shearing are solved, rapid and uniform dispersion of the seed crystal during blanking can be ensured, and controllable stirring and shearing are provided at a specific crystallization stage and during anti-solvent addition, so that uniform precipitation is promoted.

The invention relates to the technical field of light and shadow deduction, and particularly discloses an immersive space crystal light sculpture deduction system. The core structure of the device comprises a carbon fiber base frame with a heat dissipation air channel, a distributed laser projection array, a water crystal cluster of which the surface is integrated with a microprism diffraction layer and an electrochromic functional layer, a servo mechanism for driving the multi-degree-of-freedom pose adjustment of a crystal, and a central controller. Audience positions and sound source data are fused through an environment sensing module, a dynamic light and shadow stream is generated by an AI content engine, a projection array is cooperatively controlled to project a light field subjected to real-time distortion compensation to a moving crystal, and a three-dimensional light sculpture responding to environment changes is formed in space by utilizing the light interference effect of a microprism layer. The system breaks through the limitation of a static medium, realizes closed-loop interaction between a light and shadow effect and audience behaviors, and remarkably improves the immersion.

The application provides a method for constructing a two-dimensional nanosheet loaded copper metal particle-based super-smooth film, which comprises the following steps: in-situ dissociating a two-dimensional bulk material by plasma, and simultaneously depositing copper particles on the surface of the dissociated and thinned two-dimensional bulk material by a magnetron sputtering method to form a two-dimensional nanosheet loaded with copper particles; combining a flexible polymer on the surface of the two-dimensional nanosheet loaded with copper particles; and finally spraying the two-dimensional nanosheet loaded with copper particles as a spraying material on the surface of a substrate to obtain a super-smooth film. The super-smooth film is based on constructing a copper metal / two-dimensional nanomaterial heterogeneous pair on a friction interface to realize low adhesion. Meanwhile, the self-migration behavior of the crystal cluster formed by the aggregation of copper metal particles induced by friction continuously provides the interface with the heterogeneous pair through the polymer diffusion channel, which guarantees a stable super-smooth state and prolongs the wear life. The method overcomes the limitations of traditional chemical treatment and lubricating coating, is easy to realize large-area industrialized preparation, and is expected to become one of important means for prolonging the service life of moving parts.

The present application relates to the field of molecular sieve preparation, and discloses a method for regulating the size of LSX molecular sieve clusters, which comprises the following steps: 1) sequentially performing first contact and first aging on a first silicon source, an aluminum source, a sodium source and a first water to obtain a cluster size regulator; 2) performing second contact on a second silicon source, an aluminum source, a sodium source, a potassium source and a second water to obtain a gel; and 3) performing third contact on the cluster size regulator and the gel, and sequentially performing second aging and crystallization treatment on the third contact product to obtain LSX molecular sieve. The second silicon source is water glass and / or sodium silicate, and the target average particle size of the LSX molecular sieve cluster and the amount of the cluster size regulator satisfy the formula: y = 1.6517 x (100 x) ‑0.274 . According to the method, LSX molecular sieves with various cluster sizes can be prepared according to requirements, and the cluster size of the prepared LSX molecular sieve is very uniform.

This application relates to the field of hard tool manufacturing technology, and discloses a method for preparing CVD diamond-coated micro-drills and the micro-drills prepared by this method. The preparation method includes the following steps: processing a rod raw material into a micro-drill substrate; transferring the cleaned and dried micro-drill substrate into a PVD magnetron sputtering chamber for plasma cleaning; sequentially depositing a Ti transition layer, a TiC transition layer, and an amorphous carbon sacrificial layer on the surface of the micro-drill substrate; transferring it across the chamber to a hot-filament chemical vapor deposition chamber; using plasma to etch and volatilize the amorphous carbon sacrificial layer and its surface oxides to expose the unoxidized TiC transition layer; introducing carbon source gas and hydrogen in situ; epitaxially growing a CVD diamond coating; and using a femtosecond laser to remove the deposited passivated crystal clusters. This preparation method eliminates the need for acid leaching to remove cobalt, and utilizes the preferential oxidation of the amorphous carbon sacrificial layer during the transfer process to protect the underlying TiC transition layer, thus solving the problem of transition layer oxidation failure.

The utility model relates to chemical crystallization equipment technical field discloses a kind of shearing material crystallizers, including base, bracket is installed on base, and crystallization cylinder is fixed on bracket, wherein, the length of base is greater than the length of crystallization cylinder, ensure the stability of crystallization cylinder, and adopt right-angle bracket. Through rotating rod drives arc cutting knife rotation and the mutual coupling of fixed annular cutting knife, form high -efficient shear zone, can actively, powerfully break the crystal cluster and coalesced block formed in solution, promote secondary nucleation, and drive rotating rod axial movement by unique control mechanism, seamlessly adjust shear gap, to realize the mode of coarse cutting to large particle breakage from the beginning of crystallization to the mode of fine cutting inhibiting excessive growth after growth, whole course precision control, finally obtain the high-quality crystal product of uniform granularity, distribution range is narrow, realize the active and precision control of crystal granularity.

The application relates to the field of LiLSX molecular sieve preparation and discloses a preparation method of LiLSX molecular sieve, which comprises the following steps: 1) mixing a crystal cluster size regulator with a gel, aging and crystallizing to obtain LSX molecular sieve; and 2) performing lithium ion exchange on the LSX molecular sieve by using an exchange solution containing lithium ions, wherein the preparation method of the crystal cluster size regulator comprises: first contacting a first silicon source, an aluminum source, a sodium source and first water; the preparation method of the gel comprises: second contacting a second silicon source, an aluminum source, a sodium source, a potassium source and second water, wherein the second silicon source is water glass and / or sodium silicate; the target average particle size of the LiLSX molecular sieve crystal cluster and the amount of the crystal cluster size regulator satisfy the relationship y = 1.6517 x (100 x) ‑0.274 . The method can not only regulate the crystal cluster size of the LiLSX molecular sieve, but also obtain LiLSX molecular sieve crystal clusters with good uniformity.

This invention relates to an electromagnetic wave absorbing material in the 600MHz-1GHz frequency band, its preparation method, and its applications. The electromagnetic wave absorbing material comprises a magnetic composite material and carbonyl iron particles, wherein the carbonyl iron particles are aggregates of multiple two-dimensional nano-carbonyl iron particles. The magnetic composite material comprises carbon crystal clusters composed of multiple carbon crystals and tungsten disulfide. At least a portion of the carbon crystals have tungsten disulfide and carbonyl iron particles attached to their surfaces, and at least a portion of the interstices between the carbon crystal clusters are filled with tungsten disulfide and carbonyl iron particles. The carbon crystals are three-dimensional prismatic in shape and have a porous structure, while the tungsten disulfide is plate-like. This electromagnetic wave absorbing material has the advantages of being lightweight and having good thermal stability, and exhibits strong absorption performance for electromagnetic waves in the 600MHz-1GHz frequency band.