46 results about "Thermogravimetry" patented technology

The invention belongs to the field of flame-retardant materials, and particularly relates to a flame-retardant wood-plastic composite material and a preparation method thereof. Raw camphorwood powder is subjected to alkali treatment and hyperbranched silicon dioxide grafting treatment and then is subjected to melt blending with polypropylene, piperazine pyrophosphate and melamine phosphate, and the wood-plastic composite material with the intumescent flame-retardant effect is prepared. Limit oxygen index, vertical combustion, thermogravimetry, cone calorimetry and other tests show that the prepared wood-plastic composite material has excellent flame retardance, the limit oxygen index can reach 36.8%, the vertical combustion test reaches the V-0 grade, the total smoke release amount is reduced to 45.3% of that of raw materials, the flame retardance, smoke suppression and other performance are remarkably improved, and the wood-plastic composite material has good application potential.

Carbon fiber for a sliding material that exhibits satisfactory sliding properties and the like without damaging a mating material when the carbon fiber for a sliding material is produced into a sliding member by predetermined processing by way of a resin composition for a sliding material including a predetermined uncarbonized carbon fiber, and a method for efficiently producing such carbon fiber for a sliding material, are provided.Disclosed is carbon fiber for a sliding material to be blended into a resin composition for a sliding material that is formed into a sliding member by predetermined processing, in which a 5% weight loss temperature of the carbon fiber for a sliding material as determined by thermogravimetry has a value within a range of 400 to 550° C.

The invention relates to the field of heating characteristics of samples, and particularly provides a macro sample temperature jump type in-situ thermal analysis system and a macro sample temperature jump type in-situ thermal analysis method. The system is characterized in that a driving unit is arranged on a guide rail and is suitable for doing vertical movement along the guide rail; the guide rail is perpendicular to the ground; the tubular electric heating reaction unit is connected with the driving unit, and after the tubular electric heating reaction unit is heated to a target temperature, the driving unit drives the tubular electric heating reaction unit to move to the periphery of the sample placing unit, so that a macro sample in the sample placing unit is instantly heated; the accuracy of analyzing the thermogravimetry of macroscopic samples and the precipitation characteristics of volatile matters in simulated industrial application can be improved; the balance measuring unit is connected above the sample placing unit, and the initial position of the tubular electric heating reaction unit is located at the lower end of the guide rail, so that the sample placing unit and the balance measuring unit are kept stable in the process of placing a macroscopic sample into the sample placing unit, and the weighing error during sample weighing and sample reaction is reduced.

The invention discloses a method and a system for rapidly detecting moisture of biomass thermal cracking gas, which are characterized in that a target temperature interval of water analysis peaks of the thermal cracking gas of a biomass sample is obtained through a thermogravimetry-mass spectrometry combined device, and then the moisture generation amount of the biomass sample in the target temperature interval is obtained through a Karl Fischer method. According to the invention, not only can trace moisture of the thermal cracking gas be tested, but also the thermal cracking gas with high moisture content can be detected. The method can realize the online detection function of the water content of the segmented thermal cracking gas of the biomass sample, and has the advantages of high detection speed, high precision, low cost and simplicity in operation.

In this composition estimation method, first data that includes a change in mass of a sample and second data that includes the mass spectrum of the gas constituents of a sample are acquired. The second data is broken down into the product of a base spectrum matrix and an intensity distribution matrix by non-negative matrix factorization; a second intensity distribution matrix is obtained by correcting the effects of differences in ionization efficiency for each gas constituent reflected in the intensity distribution matrix on the basis of the first data to produce a mass reference; the second intensity distribution matrix is subjected to non-negative matrix factorization and broken down into the product of a matrix that includes mass proportions in each sample of a virtual sample and a matrix that includes characteristic vectors of the virtual sample; a (k − 1)-dimensional simplex is established that encompasses all of the characteristic vectors and has characteristic vectors as end members; and the content ratio of each constituent element in the sample is estimated on the basis of the distance ratios between K end members and the characteristic vectors of the sample. According to this method, the problem of the accuracy and / or the reproducibility inherent in conventional methods can be improved.

Provided is a bonding material which is capable of forming a silver bonding layer that has good bondability with a material to be bonded, wherein the density (denseness) of the silver is good. The bonding material comprises an organic acid silver salt, an organic solvent, and silver particles. The organic acid silver salt has a weight loss rate (Mr1) of 5% or less when the temperature thereof is raised from 25°C to 200°C and a weight loss rate (Mr2) of 40% or more when the temperature thereof is raised from 200°C to 280°C as determined by simultaneous thermogravimetry-differential thermal analysis (TG-DTA) (in a nitrogen atmosphere at a nitrogen flow rate of 200 ml / min and a heating rate of 10° C / min). The organic solvent contains a compound represented by general formula (1) (in the formula, R1 represents a linear or branched alkyl group having 2 to 6 carbon atoms).　The silver particles include: first silver particles that have an average particle diameter (D50 diameter) of 0.15 μm or more and 0.4 μm or less; and at least one of second silver particles that have an average particle diameter (D50 diameter) of 0.6 μm or more and 1.0 μm or less and third silver particles that have an average particle diameter (D50 diameter) of 1.9 μm or more and 2.4 μm or less.

Nanostructures including a first semiconductor nanocrystal including zinc and selenium, and a second semiconductor nanocrystal including a zinc chalcogenide, wherein a composition of the second semiconductor nanocrystal is different from a composition of the first semiconductor nanocrystal,wherein the nanostructures further include tellurium,wherein in the nanostructures, a mole ratio of selenium to tellurium is greater than or equal to about 0.83:1 and less than or equal to about 10:1,wherein a derivative thermogravimetry curve of the nanostructures has an extreme value in a temperature range of greater than or equal to about 250° C. and less than or equal to about 420° C.

The present invention provides a carrier material on which a resin composition, serving as a raw material of a resin film, can be coated, the carrier material suppressing deformation of the resin film due to lifting even after high-temperature film formation and high-temperature heat treatment, and allowing easy separation between the carrier material and the resin film.　The present invention provides a carrier material for producing a resin film, the carrier material being characterized in that: a release resin coating film is formed on one surface or both surfaces of an aluminum foil base material; the release resin coating film has the weight loss rate of 1.5% or less at 200°C and 90.0% or more at 400°C according to thermogravimetry (TG); and the adhesion amount of the release resin coating film on the surface of the aluminum foil base material is between 0.01 g / m2 and 0.4 g / m2 both inclusive.

Provided are: a resin composition containing a cyclized resin precursor and a compound B in which the thermal decomposition start temperature at which an amine is generated is equal to or less than 200°C, as measured by means of the simultaneous thermogravimetry / differential thermal analysis, and that is represented by formula (1-1); a cured product; a laminate; a cured product manufacturing method; a laminate manufacturing method; a semiconductor device manufacturing method; and a semiconductor device. In formula (1―1), R1a represents a hydrogen atom or a monovalent organic group; R2a represents a monovalent organic group; R3a represents a hydrogen atom or a monovalent organic group; R4a represents a monovalent organic group; R1a and R2a may form a cyclic structure by being bonded to each other; and R3a and R4a may form a cyclic structure by being bonded to each other.

The present invention relates to a geopolymer produced from a synthetic aluminosilicate. The synthetic aluminosilicate was produced by sol gel technology, heat treated and, later, activated using sodium silicate and sodium hydroxide in solution, having as a final product a synthetic geopolymer. The final product was submitted to CO2 adsorption analysis using thermogravimetry for adsorbed quantification. In addition to the pure geopolymer, it is also possible to produce the synthetic geopolymer with the addition of surfactant, or in the composite form with the addition of zeolite, or heat treated to form a zeolite or functionalized with amine, for example, to increase the adsorption capacity.

To provide a novel phosphorus-carbon composite material containing phosphorus and carbon, a manufacturing method of the phosphorus-carbon composite material, a negative electrode active material containing phosphorus-carbon composite material, a negative electrode for a lithium ion secondary battery and a lithium ion secondary battery.SOLUTION: A phosphorus-carbon composite material containing phosphorus atoms and carbon atoms, wherein a content of phosphorus atoms in the phosphorus-carbon composite material is 10 to 95 mass%, and the content of carbon atoms in the phosphorus-carbon composite material is 5 to 90 mass%, and a ratio WL620 / WL780 between the weight loss rate WL620 at 620°C and the weight loss rate WL780 at 780°C obtained by thermogravimetry under the following conditions is 0.1 to 0.9. (Thermogravimetry) 10 mg of the phosphorus-carbon composite material is heated from 50°C. to 780°C. at 10°C. / min under N2 using a thermogravimetry device to measure the change in weight. (Weight reduction rate) The ratio of the weight of the sample at the measurement temperature to the weight of the accurately weighed sample is defined as the weight reduction rate (% by weight) at the measurement temperature.SELECTED DRAWING: Figure 1

The invention discloses a method and system for recycling magnetic powder in oil-based neodymium iron boron cutting fluid, and belongs to the technical field of neodymium iron boron magnetic material recycling. The method comprises the following steps: feeding oil sludge waste generated by neodymium iron boron processing into a flame-proof magnetic separator, sorting out magnetic sludge, and marking and storing in batches; carrying out thermal performance test on the magnetic mud sample, and determining the volatilization temperature of the oil-based cutting fluid and the neodymium iron boron phase transition temperature; and the magnetic mud is placed in a vacuum furnace, the treatment temperature is set according to a key temperature point measured by thermogravimetry, moisture and cutting fluid impurities are removed through two-step heating treatment under the assistance of high-purity argon, and finally the high-purity neodymium-iron-boron magnetic powder is obtained. The invention further provides a recovery system, the high-performance magnetic powder is directly recovered on the premise of avoiding damage to the main phase structure of neodymium iron boron through a synergistic process of magnetic separation, thermogravimetric analysis and vacuum heat treatment, the problems of resource waste and environmental pollution of a traditional wet process and pyrogenic process recovery process are solved, and green cyclic utilization of magnetic materials is achieved.

The present invention provides an experimental method and device for measuring the storage amounts of CO2 in different storage states in pores. The method includes obtaining the pore throat radius distribution of a core through a nitrogen adsorption / desorption experiment; obtaining an excess adsorption amount curve of carbon dioxide within a preset temperature and a preset pressure range based on a thermogravimetric carbon dioxide adsorption experiment, wherein the preset pressure range is 1 to 30 MPa; correcting the excess adsorption amount curve by using a Monte Carlo molecular simulation method; and calculating the absolute adsorption amount of carbon dioxide in the core according to the pore throat radius distribution and the corrected excess adsorption amount curve. The measurement method of the present invention takes into account the volume of the adsorbed phase and overcomes the heterogeneity of the pore throat distribution when measuring the storage amounts of CO2 in different storage states in pores, and the measurement result is more accurate.

Provided is a propylene-based polymer composition which is capable of reducing odor that may occur when exposed to high temperatures in the interior of a vehicle.　Specifically provided is a propylene-based polymer composition which contains a propylene-based polymer and talc, wherein: if the total of the content of the propylene-based polymer and the content of the talc is taken as 100 parts by mass, the content of the propylene-based polymer is 98.5 parts by mass to 55 parts by mass, and the content of the talc is 1.5 parts by mass to 45 parts by mass; the average particle diameter of the talc is 2 μm to 13 μm as measured by a wet laser diffraction method; and the first heating loss in the range of 450°C to 590°C in a differential curve obtained by differential thermogravimetric measurement (DTG) using 10 mg of the talc that is extracted from the propylene-based polymer composition is 60 μg or more and less than 230 μg, and the second heating loss in the range of 620°C to 730°C is more than 0 μg and less than 300 μg.

The invention discloses a wood pyrolysis simulation method based on Fluent-UDF, and belongs to the technical field of energy utilization, and the method comprises the following steps: carrying out wood thermogravimetry, TG-DSC analysis, extraction of pyrolysis data characteristics, solving of a pyrolysis rate and a heat absorption and release calculation formula, and implantation in the Fluent-UDF to form a pyrolysis process reproduction code; the method comprises the following steps: performing Fluent simulation based on a wood pyrolysis environment, setting a wood area as a porous medium, loading a UDF code, and extracting wood thermogravimetric change simulation data after calculation; performing a wood pyrolysis experiment in the same environment to obtain wood thermogravimetric change data; wood thermogravimetric simulation and experimental data are compared, the wood pyrolysis simulation process is corrected, the wood pyrolysis simulation precision is improved, and therefore high-precision wood pyrolysis process simulation reproduction based on Fluent-UDF is achieved. According to the method, a reproduction method reference based on Fluent-UDF can be provided for wood pyrolysis simulation.

The present invention relates a particulate composite metal cyanide complex catalyst powder in which the value of A1 / A2 is 0.5 or less as measured by simultaneous thermogravimetry and differential thermal analysis, where A1 is the ratio of the mass decreasing at 30-150°C to the total mass of the composite metal cyanide complex catalyst powder and A2 is the ratio of the mass decreasing at 150-220°C to the total mass of the composite metal cyanide complex catalyst powder.

To provide a composite for a secondary battery electrode which can obtain high electrical conductivity even in an electrode by uniformly dispersing fibrous carbon on an active material and improving the adsorptivity of the active material and fibrous carbon when the active material and fibrous carbon are combined.SOLUTION: In a composite for a secondary battery electrode that includes fibrous carbon and an active material, the amount of nitrogen element measured by an X-ray photoelectron spectroscopy method is detected in the range from 0.05 mol% or more to 10 mol% or less. The exothermic peak temperature in the presence of oxygen obtained by thermogravimetry-differential-thermal simultaneous analysis of the fibrous carbon contained in the composite for a secondary battery electrode is 520°C or less.SELECTED DRAWING: None

This positive electrode active material contains a composite oxide that contains the element lithium (Li), the element nickel (Ni), and the element manganese (Mn). Designating W1 as the mass of the positive electrode active material at 400°C as measured by thermogravimetry of the positive electrode active material in an air atmosphere, W2 as the maximum mass of the positive electrode active material at a temperature of from 500°C (inclusive) to 600°C (inclusive) as measured by said thermogravimetry, and SA as the surface area of the positive electrode active material submitted to the thermogravimetric measurement, the ratio (W2-W1) / SA of the mass increase W2-W1 to the surface area SA is not greater than 0.25 g / cm2.

The invention discloses an industrial silicon raw material proportion design method based on high-temperature thermogravimetry, and belongs to the technical field of industrial silicon smelting, the method comprises the following steps: (1) establishing a database of raw material information and production information, the raw material information being divided into five layers A-E, the layer A being proportion and dosage information, and the layer B being intrinsic physicochemical characteristics of raw materials; (2) heating the raw material by using thermogravimetric equipment, wherein the information of the C layer is a characteristic quantity obtained by directly extracting or calculating and analyzing a thermogravimetric curve; (3) representing the heated raw material by using an instrument, wherein the information of the layer D is the main structure and component parameters presented in the raw material heating process; (4) representing the change rate by the E-layer data, wherein the change rate is obtained by dividing the difference of the D-layer data by the corresponding temperature change range; and (5) establishing an optimal mapping model between the raw material information and the production information by applying a plurality of data analysis methods, and realizing optimal proportion calculation after the raw materials are changed. The method disclosed by the invention is simple to operate and high in practicability, reflects a deep reaction mechanism and can automatically realize the optimal ratio of the raw materials.

The invention discloses a stability evaluation method of a thermogravimetry-instillation microextraction combined system, and belongs to the technical field of chemical analysis and testing. According to the method, a target compound and an internal standard compound with volatility are utilized to realize stable and constant-speed volatilization under an optimal test condition of a thermogravimetric-instillation microextraction combined system, a parallel experiment is carried out through instillation microextraction according to the optimal test condition, a plurality of liquid drops containing the target compound and the internal standard compound at the same time are collected, and the target compound and the internal standard compound are obtained. Measuring the concentration of the compound in the liquid drop by using a gas chromatography-hydrogen flame ionization detector to obtain a plurality of groups of concentration values, respectively calculating the relative standard deviations SD1 and RSD2 of the concentration of the target compound and the internal standard compound, calculating the concentration ratio of the target compound to the internal standard compound in each group and the relative standard deviation RSD3 of the target compound and the internal standard compound in each group, and taking the three RSD values as an evaluation index of the stability of the thermogravimetry-instillation microextraction combined system, and indicating that the stability of the combined system is good if the RSD1 is less than or equal to 10%, the RSD2 is less than or equal to 10% and the RSD3 is less than or equal to 5% in a required range.

1. Name of the design product: Atmosphere furnace (SL2B double-tube vertical thermogravimetry). 2. Use of the design product: For heat treatment of industrial raw materials. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view 1.

The invention relates to the technical field of diesel engine exhaust particulate matter test and analysis, in particular to a method for quantitatively determining diesel engine exhaust particulate matter components through combination of thermogravimetry and infrared spectroscopy. Diesel oil and lubricating oil in a sample are separated by setting a specific temperature rising program for a synchronous thermal analyzer, then gas introduced into a gas cell is repeatedly measured by using an infrared spectrometer, a series of spectrograms about the change of a C-H bond absorption peak along with time are extracted, and the analysis result is accurate. Characterizing the contents of diesel oil and lubricating oil in the sample by utilizing peak information of a C-H bond; the problem that diesel oil and lubricating oil in the diesel engine soot sample are difficult to separate is solved, the separated diesel oil and lubricating oil are quantitatively analyzed through the infrared spectrometer, the operation method is simple, the detection efficiency is high, and the result is accurate.

A coated active material (100) according to the present disclosure is provided with a positive electrode active material (11), lithium bicarbonate present on the surface of the positive electrode active material (11), and a coating layer (12) that covers at least a portion of the surface of the positive electrode active material (11), the coating layer (12) containing a lithium-containing fluoride, and when the mass of the lithium bicarbonate present on the surface of the positive electrode active material (11) is measured by thermogravimetric mass spectrometry, the lithium bicarbonate content is less than the lithium bicarbonate content. The ratio (R1) of the mass of the lithium bicarbonate to the mass of the positive electrode active material (11) is 130 ppm or more and 580 ppm or less.

A coated active material (100) of the present disclosure includes: a positive electrode active material (11); lithium hydrogen carbonate present on a surface of the positive electrode active material (11); and a coating layer (12) coating at least a portion of the surface of the positive electrode active material (11). The coating layer (12) includes a lithium-containing fluoride. When a mass of the lithium hydrogen carbonate present on the surface of the positive electrode active material (11) is measured by thermogravimetry-mass spectrometry, a proportion R1 of the mass of the lithium hydrogen carbonate in a mass of the positive electrode active material (11) is 130 ppm or more and 580 ppm or less.

The invention discloses an organic carbon and organic matter conversion coefficient determination method, which comprises: S1, selecting a proper amount of rock sample, crushing, and dividing into a sample A and a sample B; s2, determining the content of organic carbon in the sample A; s3, determining the content of organic matters in the sample B; and S4, calculating the conversion coefficient of the organic carbon and the organic matter according to the organic carbon content and the organic matter content. According to the method, the light hydrocarbon content, the soluble organic matter content and the insoluble organic matter content in the rock are respectively measured by comprehensively applying a thermogravimetric method, an extraction method and a chemical separation method, the non-organic matter impurity content in the insoluble organic matter is calculated by applying an X-ray diffraction method so as to calculate the total organic matter content, and the organic carbon content is measured by applying a carbon-sulfur analysis method so as to calculate the total organic matter content. According to the measured organic matter content and the organic carbon content, the conversion coefficient of the organic carbon and the organic matter is finally obtained, and the problem that the conversion coefficient 1.724 in the existing standard cannot meet the requirement for calculating the organic matter content in the stratum rock is solved.

The invention discloses a method for detecting the chelating degree of a crystalline glycine chelate, which comprises the following steps of: firstly, obtaining a crystal structure of glycine chelate salt through a scanning electron microscope, and judging whether the glycine chelate salt is a crystalline product or not; then characterizing through Fourier infrared spectroscopy, and judging whether the glycine chelate is subjected to chelation reaction or not through the change and deviation of a peak value; determining the content of glycine in the glycine chelate salt by adopting a high performance liquid chromatography, and determining the content of metal elements by adopting an inductively coupled plasma spectrometer; and finally, measuring free separated water and crystal water of the glycine chelate salt through thermogravimetry, and adding the glycine content, the metal ion content, the crystal water and the free water measured in each glycine chelate salt, thereby indicating the high purity characteristic of the product. According to the method, accurate detection of the glycine chelate can be realized, the operation is simple, convenient and reliable, and a means is provided for researching the crystalline chelate.

The invention discloses a heated cigarette controlled-release aroma control method based on a Maillard precursor and a product, and belongs to the technical field of novel tobacco products. The variety and number of volatile aroma compounds generated in the heating process can be determined in a targeted mode, and therefore controllable and directional release of aroma is achieved. The invention also provides a method for in-situ analysis of the aroma release process by using a thermogravimetry-instillation microextraction combined technology, and the method is used for optimizing a precursor formula. On the basis of the method, heating cigarette products which present different flavor gradient changes in the smoking process of a single cigarette or trigger different flavors by adjusting the heating temperature and product sets containing various random flavor cigarettes (such as a blind box mode) can be developed. The problem that heated cigarettes are single in taste is effectively solved, and richness and attraction of products are remarkably improved.

Provided is a catalytic cracking catalyst that has high activity even when containing carbon. The catalytic cracking catalyst of the present disclosure contains zeolite and carbon. The zeolite contains hydrogen atoms, oxygen atoms, aluminum atoms, and silicon atoms, and also contains atoms of one or more elements selected from alkali metal elements, alkaline earth metal elements, and transition metal elements, in specific proportions. The weight loss of the catalytic cracking catalyst in thermogravimetry is 0.01-1.5 wt % based on the weight of the catalytic cracking catalyst.

To provide a composite for a secondary battery electrode having high electrical conductivity by causing carbon nanotubes to be uniformly dispersed and adsorbed using a composition method using an active material and fibrous carbon.SOLUTION: In a composite for a secondary battery electrode containing fibrous carbon and a negative electrode active material, the temperature of the exothermic peak of the fibrous carbon obtained by thermogravimetry-differential-thermal simultaneous analysis in an oxygen atmosphere is 530°C or less, and the volume resistivity is 1000 Ωcm≤. Furthermore, the content of the fibrous carbon is 20 mass% or less based on the mass of the composite for a secondary battery electrode. Also an electrode for a secondary battery containing the above composite for a secondary battery electrode is provided.SELECTED DRAWING: Figure 1

To provide a laminate having a silicone layer, which can be used for a long time even in a high temperature environment while the embrittlement of the silicone layer is suppressed.SOLUTION: A laminate comprises a silicone layer and a polyimide layer, wherein the weight reduction rate of the silicone layer at 380°C, measured by thermogravimetry, is 9 mass% or less.SELECTED DRAWING: None