106results about "Material crystallisation" patented technology

A microfluidic device is provided that comprises: a substrate; and a plurality of microvolumes at least partially defined by the substrate, each microvolume comprising a first submicrovolume and a second submicrovolume in fluid communication with the first submicrovolume when the device is rotated about a first rotational axis; wherein rotation of the device about the first rotational axis causes a fixed volume to be transported to each of the second submicrovolumes.

Apparatus for GPC/TREF and TREF/GPC characterization of a polymer sample. The apparatus provides for the automated and integrated use of multiple TREF columns and a GPC system employing a multiple flow through detectors. In addition, a method for TREF/GPC characterization of a polymer sample by GPC analysis of TREF fractions at increasing TREF elution temperatures from multiple TREF columns operated in a coordinated and synchronized temperature cycle for increased sample throughput. Also, a method for GPC/TREF characterization of a polymer sample by GPC fractionation followed by TREF fractionation of the GPC fractionations.

A microfluidic method is provided that comprises: delivering a first fluid to a first lumen of a microfluidic device and a second, different fluid to a second lumen of the microfluidic device, the first and second lumens sharing a common wall which allows for diffusion between the lumens over at least a portion of the length of the lumens; and having the first and second fluids diffuse between the first and second lumens.

A cloud point monitoring device which includes thermal conductive surface, cooler, temperature sensor, detection volume, detection wall unit, fiber optic cables for transmitting light, lighter emitter, light detector, and a data acquisition and control unit. The cloud point monitoring device provides an instrument to accurately measure the cloud point of diesel fuel indicate the approximate level of crystallization in diesel fuel that has been chilled beyond its cloud point and indicate the approximate energy content of diesel fuel. The cloud point monitoring device design allows it to be made small enough to be mounted in a fuel system of a vehicle.

A microfluidic device is provided that comprises: a substrate; and a plurality of microvolumes at least partially defined by the substrate, each microvolume comprising a first submicrovolume and a second submicrovolume that is in fluid communication with the first submicrovolume when the device is rotated, the plurality of microvolumes being arranged in the device such that fluid in the first submicrovolumes of multiple of the microvolumes are transported to second submicrovolumes of the associated microvolumes when the device is rotated.

A microfluidic device is provided that comprises: a card shaped substrate having first and second opposing faces; one or more microvolumes at least partially defined by a first face of the card shaped substrate; and one or more grooves at least partially defined by a second face of the card shaped substrate; wherein a lateral footprint of at least a portion of the one or more grooves overlaps with a lateral footprint of at least one of the one or more microvolumes.

A laser beam reflected by wax crystals is used in determining the wax crystallization temperature of a hot dewaxing solvent upstream of solvent chillers. This is automatically achieved by an on-line method from a remote control point, in which a slipstream of solvent is passed through an attached solvent loop into a sample chamber in the loop, without being exposed to ambient conditions. As the sample is cooled, the beam reflections are detected and indicate the wax to crystallization temperature. Corrective measures can then be taken to prevent fouling of the chillers, if need be.

The invention aims to provide a process method for judging recrystallization tendency of a cast single-crystal superalloy to meet the actual single-crystal casting production requirement. The specificscheme is as follows: an eccentric tubular sample produces different casting stress in different wall thickness positions in a directional solidification process, as a result, the deformation degreesin the positions are different, the recrystallization degrees of the eccentric tubular sample are different accordingly during standard heat treatment, and the ratio of the area of recrystallized grains at the cross section thin wall of the tubular sample to the area of the cross section of the tubular sample is calculated to be used as the index for evaluating the recrystallization tendency of the single-crystal superalloy.

The invention discloses a visual observation device for dissolution and separation of trace soluble impurities in cryogenic liquid. The device comprises an integral glass test unit, a high-speed microscope camera unit, a cryogenic solvent filling unit, a soluble impurity charging unit, a cooling medium temperature measurement and control unit, a vacummizing unit and a gasification and discharge pipeline unit. The integral glass test unit is almost completely covered with a vacuum insulation protection jacket, and the vacuum insulation protection jacket is communicated with the vacuumizing unit to be vacuumized to high vacuum and used for achieving good cryogenic insulation of the internal cryogenic liquid and achieving the purposes of not frosting, non condensing and not influencing visual observation. The gasification and discharge pipeline unit is located at the down stream of the integral glass test unit and used for achieving controlled flowing, gasification and temperature measurement of the cryogenic liquid. The device can be effectively used for studying the characteristics of the growth process of dissolution, impurity grain supercooling separation and impurity grain accumulation of the soluble impurities in various cryogenic liquid.

The invention discloses a constant temperature and constant pressure seal test apparatus. The constant temperature and constant pressure seal test apparatus comprises a pedestal support, a pressure-control system, a temperature-control experiment system and a valve pipeline system. The pressure-control system comprises an energy accumulator and a pressure gage arranged on a pedestal; the temperature control experiment system comprises a crystallization cavity, an upper cover used for sealing is arranged on the crystallization cavity, a contact tube is arranged on the upper cover of the crystallization cavity, a solution introduction interface and a lower water outlet are arranged at a lower part of the crystallization cavity, a heating resistor is arranged in the crystallization cavity, the heating resistor is connected with a heating resistor interface arranged on the upper cover, a sensor is arranged on the upper cover; the energy accumulator is communicated with the crystallization cavity through a dimension pressure pipeline, and a dimension press valve and the pressure gage are arranged on the dimension pressure pipeline. The constant temperature and constant pressure seal test apparatus has the advantages of simple structure, high efficiency and convenience while in use, accurate temperature control, and long-term pressure control, and can be used for researching interacting phenomenon of defect rocks and a recrystallized substance of a saturated solution under constant temperature and constant pressure.

The present invention provides a method of quantitatively analyzing a trace amount of impurities such as furfural and benzaldehyde present in high purity acrylic acid with higher accuracy by using a conventionally used general-purpose analyzer and analysis conditions. In the present invention, a crystallized acrylic acid product and a mother liquor are obtained from liquid acrylic acid, and one of impurities in the mother liquor is quantitatively determined. Then, an amount of the impurity in the liquid acrylic acid is determined based on the determined amount of the impurity in the mother liquor and a ratio of impurity distributed to a mother liquor and to crystallized solid acrylic acid when acrylic acid is crystallized in a certain ratio.

The invention discloses an ultrahigh-flux platform for screening crystal generation conditions and a screening method. The platform comprises a micro-fluidic droplet chip, a micro-droplet collection chip and a characterization-analysis system, wherein the micro-fluidic droplet chip is used for generating crystallized droplets at ultrahigh flux; the micro-droplet collection chip is used for collecting the crystallized droplets generated by the micro-fluidic droplet chip; and after the micro-droplet collection chip collects the crystallized droplets, the characterization-analysis system characterizes and identifies the morphology of crystals in the crystallized droplets, and analyzes and screens out crystallization conditions corresponding to the optimal crystal morphology according to the characterized and identified morphology of the crystals. The ultrahigh-flux platform provided by the invention provides a good solution for rapid screening of crystal generation conditions. The screening method for screening the crystal generation conditions provided by the invention is based on the ultrahigh-flux platform, can quickly screen out excellent and stable crystallization conditions, andis convenient and accurate.

The invention discloses an ultrafast scanning calorimeter with a modular structure. The ultrafast scanning calorimeter comprises a multifunctional sample chamber, a sample environment control module,a fast control electronic element and a communication terminal; the communication terminal, the fast control electronic element and the multifunctional sample chamber are in signal connection in sequence; the environment control module is connected with each of the communication terminal, the fast control electronic element and the multifunctional sample chamber; and a chip sensor for bearing a sample is arranged in the multifunctional sample chamber. The ultrafast scanning calorimeter with the modular structure can change the components according to different experimental requirements and perform multi-party combination, and has higher flexibility, mobility and experimental pertinence: the temperature control can be performed by using an analog signal controller or a digital microcontroller in a switching manner; the volume, appearance design and environment control mode of the sample chamber can be changed in a targeted manner, and the experimental test in harsh, cold, high-pressureor low-pressure environments with limited space can be met; and meanwhile, the device can be used together with other auxiliary characterization equipment to measure calorimetric information, opticalinformation and the like of the sample in situ.

The invention discloses a comprehensive testing device for crystallization pressure, frost heaving and salt heaving of saline soil. A jack is arranged between a sliding plate and a bottom plate, a forcemeter is arranged on the sliding plate, a sample table is arranged on the forcemeter, a test tube is arranged on the sample table, and a to-be-tested soil sample is put in the test tube; a temperature sensor, a PF Meter matric potential sensor, a pore water pressure sensor and a Hydra Probe 2 three-parameter sensor are arranged in the soil sample, and all the sensors are connected with a processor through a data acquisition system; a pressure head matched with the sample tube is arranged on a top plate, cold bath devices A and cold bath devices B for alcohol refrigeration are arranged on thepressure head and the sample table respectively; a dial indicator mounting rack is arranged on a support rod, and a dial indicator is arranged on the dial indicator mounting rack. The device can alsostudy the influence relation of environment temperature on multiple factors of the saline soil.

The invention concerns arrays, systems and methods for screening compounds, compositions or conditions useful to treat or prevent kidney diseases. These methods are useful to discover, optimize and select compounds, compositions, or conditions that prevent, inhibit, induce, modify, or reverse physical-state transitions, particularly in-vivo physical-state transitions relating to disease causing processes such as development and growth of renal calculi. Such compounds, compositions, or conditions can be exploited to treat, prevent or manage the disease itself, the cause of the disease, or the symptoms of the disease.

The present invention relates to a column for performing analytical temperature rising elution fractionation (ATREF) characterized in that the packing of said column comprises elastic wires having a good elasticity and a good thermal conductivity. The present invention also relates to a device comprising the column according to the invention, a temperature controlling system for controlling the temperature of said column, a sample injector for injecting a polymer sample solution into said column, a pump for eluting the polymer fractions from said column and a detector for detecting eluting fractions of said sample solution. The present invention further relates to a method for performing ATREF analyses using the column according to the invention.

The invention discloses a visual microenvironment constant-temperature and constant-humidity box for interface heat transfer and mass transfer research. A temperature sensor placement hole and a temperature and humidity air supply inlet are formed in the left side wall of an upper cover; a humidity sensor placement hole, a temperature and humidity air supply outlet and an infrared window are formed in the right side wall of the upper cover; the temperature and humidity air supply inlet and the temperature and humidity air supply outlet are connected with constant-temperature and constant-humidity box pipelines; the bottom edges of the front side wall and the rear side wall of the upper cover are provided with cold and hot fluid thermal insulation pipe U-shaped clamping grooves; a microscopic observation cover plate is arranged on a top plate of the upper cover; a reserved microscope lens hole is formed in the cover plate; a thermocouple and a humidity sensor are mounted in the box; a table is arranged on a bottom plate in the box; a thermal insulation pipe is arranged in the table to convey cold and hot fluids; the thermal insulation pipe penetrates through the cold and hot fluid thermal insulation pipe U-shaped clamping grooves; and a clamping groove mounting experiment flat plate is arranged at the upper part of the table. According to the box, the liquid drop condensation and crystallization processes under the influence of temperature and humidity in the interface heat transfer and mass transfer process can be observed in real time.

The invention belongs to the technical field of metal material processing and heat treatment, and relates to a rapid and accurate testing device and method for recrystallization temperature of a metalmaterial. The device consists of a loading mechanism, an atmosphere protection heating furnace, a sample table and a data acquisition computer. According to the testing method, the recrystallizationtemperature of the metal material is determined by collecting the load-temperature change of the three-point bending sample in the continuous heating process. According to the invention, only one sample is needed, so the research work of a large number of samples which takes as long as 1-2 days can be completed within 1-2 h, and the invention has the advantages that the sample preparation number is small, equipment operation is convenient, the recrystallization temperature is determined rapidly, and the operation cost is low; a load-temperature curve is automatically acquired in real time, sothat manual testing required by a hardness testing method, a metallographic testing method and the like is reduced, errors and manual interference are greatly reduced, and the accuracy is high.

A microfluidic device comprising: a substrate shaped so as to provide the device with an axis of rotation about which the device may be rotated; and a plurality of microvolumes at least partially defined by the substrate, each microvolume comprising a first submicrovolume and a second submicrovolume that is in fluid communication with the first submicrovolume when the device is rotated, the plurality of microvolumes being arranged in the device such that fluid in the first submicrovolumes of multiple of the microvolumes is transported to the second submicrovolumes of the associated microvolumes when the device is rotated about the rotational axis.

The invention provides a fractional crystallization analysis method of polyolefin resin. The method comprises steps as follows: polyolefin resin is placed in a crucible of a differential scanning calorimeter, heated to 48-52 DEG C and kept at the constant temperature for 1-5 min; a product is heated to 210-230 DEG C, kept at the constant temperature for 4-10 min, cooled to 160-170 DEG C and kept at the constant temperature for 60-100 min; the product is cooled to 48-52 DEG C; the product is heated to 145-150 DEG C, kept at the constant temperature for 30-120 min and cooled to 48-52 DEG C; the product is heated to 120-140 DEG C, kept at the constant temperature for 30-80 min, cooled to 48-52 DEG C and kept at the constant temperature for 1-5 min; the product is heated to 180-220 DEG C, the heat flow change is recorded, and a fusion curve is obtained. Firstly, the method doesn't require a large quantity of solvents and is lower in cost and environment-friendly; secondly, the selection accuracy of raw materials is greatly improved, the test time is shortened, and the test cost is reduced; thirdly, the method is simple and convenient to operate.

The invention discloses a method for determining beneficiation route of liquid potassium ore and relates to the technical field of prospection. The method comprises the following steps: acquiring an original brine sample of the liquid potassium ore; respectively conducting a summer natural evaporation experiment and a winter natural evaporation experiment on the brine sample, and observing evaporated water loss of the brine sample, solid density, liquid density and separation conditions of novel minerals; respectively obtaining the separation types and sequence of various saline minerals, theenrichment intervals and enrichment rules of various components and beneficiation information of solid-liquid separation points in the brine sample in the summer and winter natural evaporation processes; and making a reasonable liquid potassium ore beneficiation route by virtue of the beneficiation information. According to the method disclosed by the invention, the beneficiation route of the liquid potassium ore can be reasonably and effectively determined.

The invention belongs to the technical field of gas hydrate generation experiments, and provides an experimental method for capturing full-period forms of gas hydrate crystals. A system adopted by theexperimental method comprises a jacket type visual reaction kettle, image acquisition equipment, a backlight source, a heating and refrigerating circulator, a gas injection pump, a liquid injection pump, a data acquisition system and a computer. According to the experimental method, the memory effect of hydrate secondary generation is utilized, the induction time is shortened, and hydrate crystalform capture under different working conditions below a phase equilibrium point is achieved. The experimental method is not limited by the problem that hydrates are difficult to generate or not generated under the working condition of a near-phase equilibrium point and the problem that the timely induction time is long, so that crystal form capture under more working condition ranges is obtained,the crystallization process of the hydrates is convenient to control, and a morphological basis is provided for hydrate research.

The invention discloses a vermicular graphite cast iron molten iron inoculation multi-feature-point double-sample-cup thermal analysis evaluation method. Thevermicular graphite cast iron molten iron inoculation multi-feature-point double-sample-cup thermal analysis evaluation method comprises the following steps: in vermicular graphite cast iron production, performing stokehole double-sample-cup collection of an inoculation molten iron thermal analysis cooling curve, and extracting a plurality of groups of feature points on the inoculation molten iron thermal analysis cooling curve; substituting the extracted multiple sets of feature points into a pre-calibrated inoculation index calculation model for calculation, and obtaining an inoculation index calculation value; and comparing the obtained inoculation index calculation value with a pre-calibrated inoculation effect index section range, and evaluating the inoculation effect of the vermicular graphite cast iron according to the inoculation effect index section range where the inoculation index calculation value is located. By adopting the method, the inoculation effect of the vermicular graphite cast iron molten iron can be evaluated more reasonably and accurately, an adjustment basis is provided for dynamic adjustment of the inoculation state in the production process, a good evaluation effect is achieved, and the quality of the cast iron molten iron is ensured. The method also has a certain evaluation effect on the inoculation effect of cast iron molten iron in other graphite forms.