112 results about "Crystal morphology" patented technology

The invention belongs to the technical field of materials, and particularly relates to a multi-component compounded stable extrusion insulating material and a preparation method thereof. The invention relates to a multi-component compounded stable extrusion insulating material which is prepared from the following raw materials in percentage by weight: 70-99 parts of low-density polyethylene; 5-20 parts of modified resin; 0.8 to 1.5 parts of a cross-linking agent; 0.2 to 0.6 part of a cross-linking agent auxiliary agent; and 0.5 part of an antioxidant. Through cooperation of binary base material blending, low-crosslinking multi-component additive system optimization and a flexible mixing stable extrusion process, the synergistic effect of the binary base material blending, the low-crosslinking multi-component additive system optimization and the flexible mixing stable extrusion process can be brought into full play, the crystal form of the compound insulation material is improved, the phonon transmission free path is enhanced, the content of a crosslinking agent is reduced, the melt flow stability of the insulation material is enhanced, and low-temperature stable extrusion is achieved; product defects are reduced, and production efficiency and sample quality are improved. Impurities and scorching melting points are effectively filtered, the product quality stability and the production process are greatly improved, the comprehensive electrical mechanical and heat-conducting properties of the cable are systematically improved, and effective preparation of the large-length cable is achieved.

The invention provides a production device and process for increasing the content of magnesium citrate crystals. The problems that in the prior art, the impurity co-crystallization rate is high, and crystal forms are difficult to control are solved. The device comprises a gradient temperature control multi-stage crystallization device and a crystal form directional regulation and self-adaptive separation system. The gradient temperature control multi-stage crystallization device is composed of a main crystallizer, a gradient temperature control system, an ultrasonic-assisted system and a liquid phase partition circulating system, and the crystallization environment is accurately controlled through the temperature gradients of five independent temperature zones. The crystal form directional regulation and self-adaptive separation system is composed of a seed crystal dynamic inoculation device, an electric field auxiliary directional crystallization system, a real-time crystal morphology analysis system and a self-adaptive separation system, and the crystal morphology and particle size distribution can be accurately controlled. According to the process disclosed by the invention, the main content of magnesium citrate is increased to 98.8 + / -0.3%, heavy metal impurities and organic impurities are respectively reduced by 70% and 75%, the crystal form consistency is increased to 96 + / -2%, the production period is shortened by 33%, and the process has remarkable economic benefits and social benefits.

The invention belongs to the technical field of automatic control, and discloses a cyclopropylamine (R)-mandelate crystallization process feedback control method, which comprises the following steps: acquiring the concentration, solvent temperature, stirring speed and pH value of cyclopropylamine (R)-mandelate in a solvent in real time, and forming a state parameter set reflecting the real-time state of a cyclopropylamine (R)-mandelate crystallization system; based on the state parameter set, deriving a solute supersaturation degree change rate, a nucleation rate and a crystal growth rate by adopting an explicit kinetic relationship to obtain a kinetic feature set of the cyclopropylamine (R)-mandelate; collecting the grain size, the shape and the crystallization uniformity of the crystal, and constructing a corresponding crystal quality prediction function in combination with the kinetic feature set of the cyclopropylamine (R)-mandelate to obtain a predicted crystal quality index; comparing the actually detected crystal morphology index with the predicted crystal quality index, and calculating to obtain a deviation value; the crystal quality of the cyclopropylamine (R)-mandelate is improved.

The invention relates to a micro-fluidic chip pour point depressant intelligent screening and optimizing device and method integrating multi-parameter detection, and the micro-fluidic chip pour point depressant intelligent screening and optimizing device integrating multi-parameter detection comprises an experiment module, a data acquisition module and a data analysis and control module, the experimental module comprises a power area, a conveying area, a temperature control area, an imaging area and a recovery area, the imaging area comprises a polarizing microscope and a micro-fluidic chip, the micro-fluidic chip comprises a sample introduction channel, a storage chamber, a micro-mixing chamber, a wax precipitation chamber and a temperature control system, and the micro-mixing chamber realizes efficient mixing of a pour point depressant and crude oil; the wax precipitation chamber simulates the complex flow state environment of a real oil pipeline, a wax crystal morphology observation area, a wax crystal motion behavior observation area and a wax crystal dynamic behavior observation area are arranged, the wax crystal flow state is observed, and wax crystal dynamic parameters are collected; through dynamic time sequence modeling of LSTM and strategy gradient optimization of PPO, efficient dynamic adjustment of a pour point depressant formula is realized.

The application belongs to the technical field of inorganic fine chemical phosphate purification, and provides a high-purity trisodium phosphate and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a trisodium phosphate saturated crude slurry; (2) adjusting the quality of the slurry: after the trisodium phosphate saturated crude slurry is warmed, it is placed and kept warm; (3) purification: the temperature of the adjusted slurry is controlled and kept; then, anhydrous trisodium phosphate homologous slow-release seeds are added into the slurry; the system supersaturation is adjusted in two stages; the stirring is stopped to perform normal-pressure static crystal growth, and the purified slurry is obtained; and (4) post-treatment. The prepared high-purity trisodium phosphate has extremely low impurity contents of heavy metals and anion by-products, and has regular crystal morphology and strong crystal form stability, and is not prone to problems such as caking and hydrolysis during storage.

The invention discloses a nano NON molecular sieve as well as a preparation method and application thereof. The crystal morphology of the nano NON molecular sieve is a nano particle, and the average diameter of the crystal is 50-140 nm. The molecular sieve has the advantages of nano-particle morphology, uniform particle size and small size; the molecular sieve can be used as an adsorbent or a catalyst for conversion of organic compounds, and has good performance.

The invention provides a blank molding assembly block of diamond large single crystals and a plastic growth method, and belongs to the technical field of superhard material synthesis. The blank molding assembly block comprises a mutually-embedded metal catalyst layer formed by mutually embedding a plurality of prismatic table metal catalyst structures, the whole mutually-embedded metal catalyst layer is in a prismatic table shape, one of the upper end face and the lower end face of each prismatic table metal catalyst structure is in contact with the high-purity graphite carbon source layer, and the other one of the upper end face and the lower end face of each prismatic table metal catalyst structure is in contact with the seed crystal; the adjacent prismatic table metal catalyst structures are separated by an insulating layer, and the insulating layer is a Ca coating or a BN coating. A mutually-embedded prismatic-table-shaped metal catalyst structure with an axial temperature gradient and a carbon diffusion channel is constructed in a blank assembly block, diamond is induced to grow in a preset direction in an HPHT environment, directional shaping growth of the diamond is achieved under the condition that the process complexity is not improved, and the quality of the diamond is improved. The crystal morphology controllability, the catalytic agent utilization efficiency and the final drilling rate are remarkably improved, and the single-cavity yield is increased.

The application discloses a nano aluminophosphate molecular sieve and a synthesis method thereof. The crystal structure of the aluminophosphate molecular sieve is an aluminophosphate-A type crystal structure, the crystal morphology is similar to a cube, and the crystal edge length is 30-110 nm. The crystal outer surface has irregular step lines, and with the decrease of the crystal size, the crystal morphology tends to be a sphere. The synthesis method of the nano aluminophosphate molecular sieve comprises the following steps: (1) preparing initial gel materials; (2) performing crystallization treatment on the gel obtained in the step (1) under crystallization reaction conditions; (3) further separating after the crystallization treatment, and then treating under drying conditions and calcination conditions to obtain the nano aluminophosphate molecular sieve. The synthesis method adopts a novel structure directing agent to synthesize the nano aluminophosphate molecular sieve, and the synthesis process is simple and operable, and the target product can be obtained without harsh conditions.

The waterproof multi-layer display device comprises a main display module, the main display module comprises a substrate, a liquid crystal layer, a conductive layer, a first base layer and a second base layer, the liquid crystal layer is arranged between the first base layer and the second base layer, the substrate is attached to the first base layer, the surface of the substrate is covered with a layer of flat conductive adhesive, and the conductive layer is arranged between the first base layer and the second base layer. The liquid crystal layer is injected between the first base layer and the second base layer in a filling manner, the second liquid crystal layer is filled between the conductive layer and the polarizing plate and is arranged between the conductive layer and the conductive adhesive, and the conductive adhesive and the conductive layer are separated from each other; the second liquid crystal layer is arranged between the conductive layer and the conductive adhesive, the conductive adhesive and the conductive layer are separated from each other, the conductive layer and the conductive adhesive are covered with a moisture-proof agent, the conductive layer applies voltage to the liquid crystal layer to change the crystal form of the liquid crystal layer, and the conductive layer covers the conductive adhesive to ensure the overall conductive sensitivity; the moisture-proof agent covering the surface of the conductive adhesive and hydrophobic groups of the moisture-proof agent form double barriers.

The invention belongs to the technical field of ardealite treatment, and particularly relates to a method for preparing high-strength alpha-semi-hydrated gypsum from ardealite. The method comprises the following steps: fully dissolving an organic acid salt and a crystal modifier in deionized water by adopting a normal-pressure organic acid salt solution method to obtain an organic acid salt solution system; heating the organic acid salt solution system to a dehydration conversion reaction temperature, and then adding ardealite for reaction; and filtering the reaction liquid, and cleaning and drying a filter cake to obtain the high-strength alpha-semi-hydrated gypsum. By controlling various factors such as the variety and concentration of the organic acid salt, the dosage of the crystal modifier, the reaction temperature and the addition amount of the phosphogypsum, the conversion of the phosphogypsum to the alpha-semi-hydrated gypsum is realized in multiple ways, and the crystal morphology of the alpha-semi-hydrated gypsum is effectively regulated and controlled, so that the alpha-semi-hydrated gypsum forms a short columnar crystal of which the length-diameter ratio is close to 2.2; therefore, the high-strength gypsum with the compressive strength reaching 25MPa is prepared.

To provide a compound for use as a medicine.SOLUTION: Provided are a compound of formula (1) as an anhydrate which is in a crystalline Form 2, characterized by having a powder X-ray diffractogram presenting peaks expressed as degree 2θ angles at about 9.5, 11.8, 14.1, 14.6, 17.7, and 18.5, and a solid form thereof.SELECTED DRAWING: None

The invention relates to the technical field of regulation and control of ethylene glycol antimony, in particular to a preparation method for conveniently regulating and controlling the morphology of ethylene glycol antimony crystals, which comprises the following steps: adding an antimony source and ethylene glycol into a reaction kettle according to a mass ratio of 1: (3-8), and stirring until the antimony source is completely dissolved to obtain an antimony source-ethylene glycol solution; and adding a crystal morphology regulating agent into the obtained solution, and uniformly stirring and mixing. By selecting different types of regulating agents and adjusting the dosage, flaky (1-5 microns), columnar (length-diameter ratio is (3-5): 1) or spherical (0.5-2 microns) ethylene glycol antimony crystals can be stably prepared, and the requirements of different polyester synthesis scenes are met.

The invention provides a preparation method of micro-nano anhydrous gypsum with various crystal forms, and belongs to the technical field of recycling of inorganic non-metallic materials and solid wastes. The method comprises the following steps: by taking phosphogypsum as a raw material, firstly washing and drying the phosphogypsum; then, selecting different reaction medium systems and corresponding crystal form / morphology control agent combinations, and regulating and controlling corresponding reaction temperature, time and stirring rate to directionally prepare a micro-nano anhydrous gypsum precursor with spherical, short columnar, layered or cubic morphology; and finally, filtering, washing, drying and calcining to obtain a final micro-nano anhydrous gypsum product. According to the invention, through precise regulation and control of process conditions, controllable preparation of the morphology of the anhydrous gypsum crystal is realized, the added value of the product is high, and a new way is provided for high-quality utilization of phosphogypsum.

The application relates to the field of molecular sieves, and discloses a ZSM-5 molecular sieve, a preparation method and application thereof, and a catalytic cracking method of triisopropylbenzene. The ZSM-5 molecular sieve has a cross-assembled aggregate crystal morphology formed by sheet-shaped nanocrystals, and the sheet-shaped nanocrystals adjacent to each other in the molecular sieve have a cross-assembled aggregate crystal morphology formed by 90 DEG + / -10 DEG rotation symbiosis and 30 DEG + / -5 DEG rotation symbiosis.

The invention discloses a battery grade ferrous sulfate continuous cooling crystallization method and system based on a crystal form directing agent, and the method comprises the following steps: mixing a purified ferrous sulfate solution with a nanoscale CHA / MOR molecular sieve crystal form directing agent, feeding the mixture into a multi-stage continuous crystallization kettle, carrying out temperature control crystallization, and finally carrying out solid-liquid separation to obtain a product, the system correspondingly comprises a crystallization kettle, a crystal form guiding agent and a seed crystal adding unit which are connected in sequence, the crystal morphology is actively regulated and controlled by utilizing the specific crystal form guiding agent, and the high-tap-density columnar crystal is obtained; an electric field is arranged in a crystallization transition area, so that in-situ directional migration and deep removal of foreign ions are realized; a crystal form memory elimination module is integrated, impurity circulation is broken through rapid freezing-instantaneous heating, efficient and energy-saving deep purification is achieved, the problems that in battery-grade ferrous sulfate production, the crystal morphology is uncontrollable, the impurity content is high, the technological process is long, and energy consumption is large are synchronously solved, and the product is high in purity and good in physical performance; the method is especially suitable for preparing a lithium ion battery positive electrode material precursor.

The present disclosure relates to an ANA-structure faujasite zeolite and a preparation method thereof, a unit cell chemical formula of the ANA-structure faujasite zeolite being |Na x |[Si y Al z O 96 ] wherein x = 6-15, y = 30-37, and z = 10-16; the ANA-structure faujasite zeolite has a spherical crystal morphology. The ANA-structure faujasite zeolite of the present disclosure has a spherical crystal morphology and exhibits excellent molecular diffusion performance, and has good application prospects in the fields of small molecule acid catalytic reactions, small molecule gas adsorption separation, ion adsorption purification, and the like.

This invention provides a radially temperature-adjustable crystal growth apparatus and method, relating to the field of silicon carbide crystal growth technology, to improve the technical problem of inconvenient radial temperature gradient adjustment of the crystal to be grown in the prior art. It includes a heating furnace, a crucible, and a radial temperature gradient adjustment device; the crystal to be grown and silicon carbide powder are respectively arranged inside the crucible; the radial temperature gradient adjustment device is disposed on the top wall, and includes a driving component and multiple heat reflectors connected to the driving component; the multiple heat reflectors selectively move above the crystal to be grown under the action of the driving component to reflect at least a portion of the heat above the crystal to be grown to the crystal, thereby adjusting the radial temperature gradient at the growth interface of the crystal. This invention can effectively reduce crystal defects, improve substrate yield, and obtain the desired crystal morphology.

The present invention provides omadacycline crystalline free base and a method for synthesizing the same. The present invention also provides pharmaceutical compositions containing omadacycline crystalline free base and methods for using the same to treat bacterial infections. The present invention also provides a method for purifying crude omadacycline free base, including crystallization to produce crystalline omadacycline free base. The omadacycline crystalline free base can also be used to prepare salts of omadacycline, such as the tosylate salt.

The embodiment of the invention provides a corrosion device for crystal treatment. The corrosion device comprises a corrosion crucible and a lifting structure arranged on the corrosion crucible, the corrosion crucible is used for filling corrosive liquid, the corrosive liquid is used for leveling crystal morphology and / or corroding target substances, and the target substances comprise volatile matters and / or cosolvents at the bonding positions of the crystals and the crystal tray; the lifting structure is used for placing a crystal, a protrusion is arranged at the bottom of the lifting structure and used for making contact with the surface of the crystal, and the contact area of contact is smaller than a first preset threshold value.

The invention belongs to the technical field of industrial process control and detection, and relates to a coaxial light source double-telecentric imaging analysis method for in-situ detection of a crystal three-dimensional form in a crystallization process, which comprises the following steps of: constructing a sufficient public focusing area by using a coaxial double-telecentric lens with adjustable depth of field; the method is used for in-situ high-quality imaging and three-dimensional shape analysis of crystals in a crystallizer solution. The method comprises the following steps: firstly, designing a three-dimensional coaxial light source double-telecentric imaging equipment scheme which comprises a coaxial double-telecentric camera with an adjustable numerical aperture and a collimation backlight illumination device, obviously expanding a common focusing area of a conventional binocular imaging scheme, and shooting a particle image with a higher contrast ratio compared with an imaging background; and secondly, an in-situ calibration method based on a newly designed three-dimensional calibration target is established for the binocular imaging equipment, so that in-situ calibration application in a limited environmental space of the crystallizer is facilitated. Finally, a dense stereo image reconstruction method is provided, and the three-dimensional shape and size information of each particle can be accurately measured in a crystallization solution.

The invention discloses a multi-port optical switch based on a phase change material and nonvolatile regulation and control. Different combination states of the phase-change material units are realized by arranging the plurality of phase-change material units and by means of crystal form control of the phase-change material units, so that a transmission path of an optical signal in a multimode interference region is changed, full logic mapping of the optical signal at a plurality of output ports and input ports is realized, and the optical switch supports a 1 * N or M * N optical switch matrix. A plurality of basic units do not need to be connected in series or in parallel, so that high-integration-level implementation of an integrated circuit is facilitated, and a foundation is provided for subsequent large-scale extension. Meanwhile, the phase change material is adopted to regulate and control the multimode interference area of the optical switch, power consumption can be remarkably reduced, and the optical switch is suitable for long-term stable optical path configuration and has the advantages of being small in size, high in integration degree, high in switching rate and the like.

The application relates to the field of molecular sieves, and discloses a ZSM-48 molecular sieve, a preparation method and application thereof, a hydrogen type ZSM-48 molecular sieve, a preparation method and application thereof. The molecular sieve has a nanosheet morphology formed by agglomeration of nanoparticles, the length of the nanoparticles is not higher than 50 nm, and the length of the nanosheet is not higher than 1000 nm. The ZSM-48 molecular sieve has the nanosheet morphology formed by agglomeration of nanoparticles, the crystal morphology is special, the accessibility is good, and the ZSM-48 molecular sieve has good catalytic performance in organic matter conversion reactions.

Disclosed are crystalline forms of the compound of formula (I): (I) Also disclosed are compositions containing the crystalline forms of the compound of formula (I) and methods of their use. The methods may be for treating cancer in a subject in need thereof, e.g., by administering to the subject an effective amount of the crystalline form disclosed herein or its composition.

The utility model relates to a crucible powder heat-conducting bearing plate for silicon carbide crystal growth, which comprises a plate body, the plate body is fixed in a crucible, a lug is arranged on the plate body, the top of the lug is a cambered surface, and a gap is reserved between the top of the lug and the top of the crucible. The temperature gradient of the silicon carbide crystals in the growth process is uniform and controllable, dislocation and defects are not prone to occurring in the crystal growth process, and the crystal morphology is good.

The invention provides an SAPO-34 molecular sieve and a preparation method and application thereof, the crystal morphology of the SAPO-34 molecular sieve is a sheet structure, the length of the sheet structure is less than or equal to 1.0 mu m, the width is less than or equal to 1.0 mu m, and the thickness is less than or equal to 500nm. The SAPO-34 molecular sieve provided by the invention is applied to a methanol-to-olefin reaction, has higher low-carbon olefin selectivity, is remarkably improved in reaction stability, and is suitable for industrial production and application.

The application discloses an aragonite whisker preparation method and system based on image recognition and multi-model prediction, and comprises the following steps: in each sampling period, a microscopic image of reaction slurry is subjected to mask extraction, skeleton thinning, cross point breaking and ellipse fitting processing, an average observation vector of crystal size is decoupled and output, a 2D-PBM is input with estimated liquid phase ion concentration, a two-dimensional growth kinetics model is combined, and a posterior state vector at the current moment is obtained; an ESN proxy model is used to replace the 2D-PBM, and the crystal morphology evolution trajectory in the future time domain is deduced within the current sampling period; air inlet component fluctuation is fed forwardly compensated, and adjustment instructions for temperature and air inlet flow are output and executed. The application realizes direct and real-time closed-loop control on the aspect ratio of acicular crystals, suppresses morphology degradation caused by impurity fluctuation, and improves product quality and aragonite phase purity.

The invention discloses a flash evaporation drying method for oxytetracycline alkali wet crystals. According to the method, a flash dryer is adopted for treatment; the inner wall of the main machine is of a spiral sleeve layer structure, and a crushing and stirring device is arranged at a central shaft; the crushing and stirring device is composed of a horizontal crushing and stirring cutter, a vertical crushing and stirring cutter and an inclined crushing and stirring cutter. Through the synergistic effect of the spiral jacket layer structure and the crushing and stirring cutter, materials from top to bottom are crushed and thrown to the wall of the crusher, the effects of strengthening crushing and accelerating drying are achieved, the problems that in a traditional drying process, metal is left, the crystal form of a product is prone to being damaged, and the color becomes deep are solved, and the crushing efficiency and the drying efficiency can be remarkably improved; meanwhile, the contact time of heat-sensitive substances in the materials and hot air flow is shortened, generation of related substances is reduced, the product quality is improved, the requirement and consumption of heat energy are reduced, and energy conservation and environment protection are achieved.

The invention discloses crystal separation equipment for producing menthol with high cool degree and low bitter degree, and relates to the technical field of medicinal material processing, the crystal separation equipment comprises a plurality of temperature control crystallization tanks and a plurality of crystallization buckets capable of rising and falling, the crystallization buckets are arranged on the inner sides of the temperature control crystallization tanks, the side walls of the crystallization buckets are provided with a plurality of separation holes distributed at equal intervals along an annular track, and the separation holes are communicated with the temperature control crystallization tanks. And an intercepting ring for covering the separation hole is arranged on the inner side of the temperature control crystallizing tank. According to the menthol crystallization device, mother liquor distributed on the upper portion in the crystallization barrel can be discharged into the temperature control crystallization tank through the separation holes, so that the aim of conducting pretreatment operation on a large amount of crystallized menthol is achieved. The liquid-solid proportion in the subsequent separation operation process is reduced, and the load of equipment for performing precise separation operation on menthol subsequently is reduced. The impurity entrainment amount in a large number of crystals can be preliminarily reduced, the phenomenon that the crystals are broken or dissolved due to excessive mother liquor during subsequent precise separation can be effectively avoided, and the crystal form of menthol in the subsequent high-purity separation operation process is protected.

The invention provides an ice rink ice making system energy consumption optimization control method based on the Internet of Things, and the method comprises the steps: obtaining ice surface temperature distribution, friction force distribution and crystal microscopic image data, constructing an ice surface state data set, and analyzing a local ice crystal reconstruction region, caused by a friction heat generation phenomenon, of an ice surface; performing feature extraction on the crystal microscopic image data of the local ice crystal reconstruction area, including crystal form and size features, and determining the position and range of local ice crystal reconstruction according to the crystal form and size features; determining a refrigeration power distribution scheme by analyzing the characteristics of friction distribution in the ice surface state data set in real time according to the temperature gradient anomaly spatial and temporal distribution characteristics of the region boundary; and through the optimized water spraying frequency distribution and refrigeration power distribution scheme, the refrigeration power output and the water spraying frequency of each area are adjusted according to the real-time change of the ice surface performance requirement, a control parameter combination is determined, and a dynamic control instruction is obtained.

The invention discloses an n-type silicon carbide crystal and a liquid phase growth method thereof, and belongs to the technical field of semiconductors. By changing the formula of a growth raw material for silicon carbide growth, the growth raw material is configured to be SixCryMz, the molar ratio x of Si to the raw material is 40-76%, the molar ratio y of Cr to the raw material is 20-60%, and the molar ratio z of M to the raw material is 1-4%; m is one or more of Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Y, Zr, Nb, Mo, Ce, La, Tb, Nd, Ta and Pr. According to the method, other elements M are doped on the basis of a Si-Cr system, the liquid growth method is matched to replace an Al element to improve the crystal morphology, meanwhile, evaporation of solution components can be inhibited, and the growth system can be kept stable for a longer time, so that the n-type silicon carbide crystal with more uniform surface steps can be grown.