61 results about "Dispersity" patented technology

A micron-sized speckle preparation method for quasi-in-situ OIM-DIC mesoscopic strain field analysis comprises the following steps: (1) polishing the surface of a sample to be detected to obtain a bright and scratch-free mirror surface; (2) preparing Si powder turbid liquid; (3) dipping speckles of a sample to be detected in the Si powder turbid liquid to obtain micron-sized speckles; and (4) observing and shooting speckle morphology, and if Si particles are uniformly distributed and dispersed, applying the Si particles to quasi-in-situ OIM-DIC mesoscopic strain field analysis. The method is simple, convenient and rapid, low in operation and construction cost, high in practicability, good in particle dispersity, high in precision, more suitable for calculation of a quasi-in-situ OIM-DIC mesoscopic strain field, controllable in preparation process, low in cost and free of damage to the surface of a sample, the definition and stability of speckle characteristics are remarkably improved, DIC mesoscopic micron-scale operation under a quasi-in-situ OIM mechanical test can be effectively achieved, and the method is suitable for large-scale industrial production. And the grain and mesoscopic strain field information is successfully coupled.

The present invention is a resist composition containing a hypervalent iodine compound, a carboxy-group-containing polymer, and a solvent, where the carboxy-group-containing polymer includes a repeating unit of a carboxylic acid derivative, represented by the following formula (1), and the polymer has a dispersity Mw / Mn of 1.30 or less, where Mw is a weight-average molecular weight and Mn is a number-average molecular weight measured by gel permeation chromatography. This can provide: a non-chemically amplified resist composition excellent in sensitivity and limiting resolution in photolithography using a high-energy beam; a laminate including the resist composition; a patterning process using the resist composition; and a method for manufacturing the resist composition.

To provide a chemically amplified positive resist composition that can give a resist film which has extremely high isolated space resolution, small LER, excellent rectangularity, and on which formation of a resist pattern with suppressed etching resistance or pattern collapse is possible, and a resist pattern forming method using the chemically amplified positive resist composition.SOLUTION: A chemically amplified positive resist composition contains: (A) a base polymer which includes a repeating unit derived from hydroxystyrene or hydroxynaphthalene and a repeating unit derived from hydroxystyrene in which a hydroxy group is protected by acid-labile group or hydroxynaphthalene in which a hydroxy group is protected by acid-labile group, and in which dissolubility to alkali aqueous solution increases by acid action, and a dispersion degree is 1.0 to 1.19; (B) photo-acid generator expressed by the following formula (B); and (C) organic solvent.SELECTED DRAWING: None

The invention discloses a polyaluminum chloride-based flocculant as well as a preparation method and application thereof, belongs to the technical field of preparation of flocculants, and aims at solving the technical problem that the flocculation performance and the stability of a flocculant in the prior art need to be further improved. The surface charges of iron-based particles are adjusted through sodium citrate, so that the problem of particle agglomeration is effectively avoided, the coating uniformity of microgel is improved, and the specific surface area of the material is increased; abundant cation sites are introduced into the trimethylamine modified chitosan, so that the electrostatic adsorption capacity of the microgel on anion pollutants is remarkably enhanced, and meanwhile, the electrical property and the stability of a system are improved; the addition of sodium metasilicate further promotes the modified PAC to form a stable Al-O-Si bridging structure, the material is endowed with good three-dimensional skeleton strength and composite interface stability, the three components cooperate with each other and play key roles in particle dispersity, charge construction and skeleton stability, and finally, an efficient, stable and storable composite flocculation system is constructed.

The invention belongs to the field of conductive slurry, and particularly discloses a method for detecting the dispersity of slurry particles. The detection method comprises the following steps: centrifuging slurry, sampling from the bottom of the slurry, and forming a film on the obtained sample to obtain a test sample film; spraying metal on the surface of the test sample film, and observing the particle size and the number of large particles in the test sample film by adopting a scanning electron microscope; the centrifugation is as follows: the slurry is centrifuged for 3-12 times by adopting a centrifugal force of 500-3000g, and each time is centrifuged for 10s-7min. The large particles are actively enriched to the bottom of the slurry through centrifugation, and then are directly sampled and observed from the bottom, so that the large particles are more easily captured and analyzed. According to the method, the problems that in a traditional method, due to the fact that large particles naturally sink to the bottom in the drying film forming process and are difficult to be effectively observed by an electron microscope, size misjudgment and number missing detection are caused are fundamentally avoided, and therefore more accurate statistics and characterization of the large particles in the slurry are achieved.

The invention provides a preparation method of rod-like copper powder, and belongs to the field of micro-nano copper powder preparation. The preparation method comprises the steps that a copper salt solution, a dispersing agent and halide ions are mixed to obtain a precursor solution, and the pH value of a reaction system is any one of 8-12; a reducing agent is added into the precursor solution at a preset rate, a reduced copper powder solution is obtained, the pH value of a reaction system is any value in the range of 8-12, and the preset rate is any value in the range of 0.1 mL / min to 3 mL / min; and the reduced copper powder solution is subjected to aftertreatment, and the rod-shaped copper powder is obtained. According to the preparation method, crystals are effectively induced to grow along the specific orientation, the reduction and growth rate is accurately regulated and controlled, and the prepared rod-like copper powder is uniform in morphology, narrow in particle size distribution, good in dispersity and high in purity.

The application relates to the technical field of nanomaterials, and discloses monodisperse nanometer carbonate and a preparation method and application thereof. The method for preparing the monodisperse nanometer carbonate comprises the following steps: (1) performing acid-base neutralization reaction on a calcium source and / or a magnesium source and a surfactant in the presence of an organic solvent; wherein the calcium source is an alkaline calcium source, the magnesium source is an alkaline magnesium source, and the surfactant is an organic acid; (2) mixing water with the product obtained through the acid-base neutralization reaction in step (1); (3) performing first carbonization reaction on the mixture obtained through step (2) and a carbon source a; (4) performing second carbonization reaction on the product obtained through the first carbonization reaction and a carbon source b; wherein the carbon source a is different from the carbon source b. The monodisperse nanometer carbonate particles disclosed by the application are small in particle size, 1-5 nm in size, small in particle size, uniform in particle size distribution, monodisperse, and good in dispersity.

The preparation method comprises the following steps: firstly, adding PEG (Polyethylene Glycol) which accounts for 3% of the mass of an industrial byproduct magnesium chloride solution as a dispersing agent into the industrial byproduct magnesium chloride solution, stirring and dissolving under the ultrasonic action to obtain a mixed solution, then carrying out ultrasonic precipitation reaction, and carrying out ultrasonic precipitation reaction on the mixed solution at constant temperature to obtain the flame-retardant grade magnesium hydroxide. The preparation method comprises the following steps: under the combined action of stirring and ultrasound, dropwise adding ammonia water to carry out a precipitation reaction, then standing and curing the reacted slurry at a constant temperature, and finally carrying out solid-liquid separation, washing, drying and grinding to obtain a flame-retardant grade magnesium hydroxide product, the XRD pattern of the product is consistent with the characteristic diffraction peak of a standard magnesium hydroxide diffraction pattern, the diffraction peak is sharp and has no impurity peak, and the flame-retardant grade magnesium hydroxide product is obtained. The particle size D90 is less than or equal to 1.5 mu m, and the morphology is an irregular sheet structure which is uniformly dispersed. According to the invention, the industrial byproduct magnesium chloride is used as a raw material to prepare the flame-retardant grade magnesium hydroxide with high purity, superfine particle size and good dispersity, and high-valued utilization of the byproduct magnesium chloride is realized.

The invention discloses nano magnetic powder with high dispersity and uniform particle size and a preparation method of the nano magnetic powder, and belongs to the technical field of powder material preparation and treatment. According to the invention, the dispersion medium, the dispersing agent and the wetting agent are added into the nano magnetic powder, so that efficient dispersion of the nano magnetic powder can be realized; meanwhile, the ultrahigh-pressure jet flow homogenization treatment is combined, so that soft aggregates can be thoroughly crushed, and the nano magnetic powder is monodispersed; besides, after the coating agent is used for coating, the magnetic effect can be weakened, secondary agglomeration can be prevented, and the stability of the coating slurry and the nano magnetic powder is remarkably improved; the particle size distribution of the powder can be accurately regulated and controlled by further adopting rotational flow grading treatment, and the nano magnetic powder with uniform particle size distribution is obtained; and the whole preparation process flow realizes integration of dispersing, coating, grading and drying, the process flow system is complete, parameters are easy to control, the method is suitable for large-scale continuous production, and the product performance is stable and reliable.

The invention relates to the technical field of optical material preparation, and provides a polymerizable liquid crystal compound, a polymerizable composition and a phase difference film, a steric hindrance substituent group is introduced to a proper position of a short axis of the polymerizable liquid crystal compound, and the compound shows excellent reverse wavelength dispersity after film forming. Besides, steric hindrance substituent groups are introduced into proper positions of the molecular structure of the polymerizable liquid crystal compound, so that the structural regularity is destroyed, and the compound shows excellent solubility. A phase difference film produced using the polymerizable liquid crystal compound is not susceptible to crystallization and alignment defects.

The invention discloses a color master batch dispersibility detection method based on a rheology principle. The method comprises the following steps: S1, preparing a polymer melt test sample containing a color master batch to be detected and a standard sample with good dispersibility; s2, using a capillary rheometer to obtain the total pressure drop when the sample flows through the capillary; s3, determining inlet pressure drop of the to-be-detected sample and the standard sample; s4, on the basis of the difference between the inlet pressure drop of the to-be-tested sample and the inlet pressure drop of the standard sample, calculating a dispersity index for quantitatively evaluating the dispersion degree of the to-be-tested color master batch. According to the invention, the color master batch dispersibility is improved from qualitative description to quantitative evaluation, and the reproducibility, comparability and high sensitivity of the detection method are ensured.

The invention discloses sedimentation-free and agglomeration-free nano-diamond slurry and a preparation method and application thereof.The sedimentation-free and agglomeration-free nano-diamond slurry is composed of a component A and a component B. The weight percentage of the component A to the component B is 80-95 wt%: 5-20 wt%, the component A is prepared from, by weight, 20-50 wt% of a first organic solvent, 20-50 wt% of a silane coupling agent, 5-20 wt% of a dispersing agent, 5-20 wt% of a permeation promoter and 5-20 wt% of nano-diamond powder, and the component B is prepared from, by weight, 20-50 wt% of a second organic solvent, 5-20 wt% of the content of the silane coupling agent is 2-5 wt%, the content of the dispersing agent is 5-20 wt%, the content of the permeation promoter is 3-10 wt%, the content of the nano diamond powder is 15-70 wt%, and the permeation promoter is selected from at least one of pure Fe powder, pure Co powder, 2% of pure Cr powder and pure CeO2 powder; the component B is prepared from the following raw materials in percentage by weight: 60 to 80 percent of second organic solvent, 10 to 20 percent of resin and 10 to 20 percent of corresponding curing agent. The dispersity and stability of the nano-diamond powder are remarkably improved; the slurry viscosity is optimized, and a simple dip-coating process is realized; a thick hardened infiltrated layer is formed, and the steel hardness is remarkably improved; the process is simple, economical and environment-friendly; and universality and expandability are realized.

The purpose of the present invention is to provide a novel material which exhibits good alkali solubility when irradiated with a high-energy ray and which can be used as a resist material. A novel material according to the present invention is a branched organopolysiloxane which is represented by an average unit formula (1), has a weight-average molecular weight of 2,000 or less, has a polydispersity of 1.30 or less, and has, in the molecule, a hydrophilic group protected by an acid-decomposable functional group: (R3SiO1 / 2) a (R2SiO2 / 2) b (RSiO3 / 2) c (SiO4 / 2) d (O1 / 2Z) e (1), r is a group selected from a monovalent hydrocarbon group or the like and a hydrophilic group protected by an acid-decomposable functional group, and a, b, c, d and e are numbers satisfying the following conditions: 0 < = a, 0 < = b, 0.8 < = c, 0 < = d, 0 < = e, and a + b + c + d = 1).

The invention discloses a multi-element enhanced alginate-based composite film and a preparation method thereof, and belongs to the technical field of polymer composite materials. Through component optimization, hydroxyethyl cellulose is used as a flexible chain segment and forms a physical entanglement network with an alginate matrix through a hydrogen bond; the microcrystalline cellulose is used as a rigid reinforcing phase and is uniformly dispersed in a matrix to form an effective stress transfer skeleton. The tensile strength and the tear resistance of the film are remarkably improved, and the modified porous filler is also added, so that the dispersity is more excellent, and more excellent filling and loading effects are achieved. Besides, a crosslinking solution containing zinc ions is adopted, an excellent crosslinking network can be formed, the stability of the film structure is promoted, under the condition that antibacterial agents such as nano-silver and chitosan do not need to be additionally added, the obvious antibacterial effect is still achieved, the release rate of the zinc ions can be controlled by regulating and controlling the crosslinking density, and in order to achieve the long-acting and stable antibacterial effect, the application range is wide. The overall biological safety is higher.

The invention provides non-spherical colloidal silicon dioxide as well as a preparation method and application thereof, and belongs to the technical field of polishing solutions. The preparation method comprises the following steps: firstly, uniformly dispersing a seed crystal silicon dioxide solution in ultrapure water, adding organic acid to adjust the pH value of the solution to be acidic to obtain a mixed solution A, heating the mixed solution A to a preset temperature, and curing for a certain time to finally form preliminarily-shaped colloidal silicon dioxide small particles; and then dropwise adding alkyl silicate at a constant speed until the particles grow to a target particle size, and heating and concentrating to remove alcohol to obtain the non-spherical colloidal silicon dioxide. The colloidal silicon dioxide prepared by the method is high in non-sphericity degree and good in stability and dispersity and can be used as grinding particles of a CMP polishing solution, and the method is easy to operate, low in cost and suitable for large-scale production.

The invention relates to the technical field of nano catalytic materials, and discloses a modified Y-type molecular sieve and a preparation method and application thereof, the modified Y-type molecular sieve comprises a Y-type molecular sieve and a ruthenium element loaded on the Y-type molecular sieve; the temperature of a main reduction peak in a reduction curve of the modified Y-type molecular sieve obtained through H2-TPR test is 150-200 DEG C; and after reduction at 500 DEG C in a hydrogen atmosphere for 1 h, TEM characterization shows that the average particle size of the ruthenium metal particles on the modified Y-type molecular sieve is 1.5-3.5 nm. The modified Y-type molecular sieve is good in ruthenium dispersity, high in catalytic activity and good in activity stability.

The application discloses a ternary precursor and a preparation method and application thereof. The preparation method comprises the following steps: 1) nucleation: metal salt solution, ammonia water and lye are introduced into a reactor to perform a nucleation reaction, a protective gas is introduced in the early stage of the nucleation reaction, and a mixed oxygenation gas is introduced in the middle and late stages of the nucleation reaction; 2) growth: after nucleation, the reaction is continuously performed to grow, a protective gas is introduced in the early stage of the growth, a strong mixed oxygenation gas is introduced in the middle stage of the growth, a protective gas is introduced in the late stage of the growth, the feeding is stopped when the growth reaches a preset particle size, the reaction is ended, and the ternary precursor is obtained. The ternary precursor with good sphericity and high tap density and small particles is prepared by controlling the reaction gas atmosphere in the preparation stage, the dispersity of the particles is good, the preparation method is simple, the reaction repeatability is high, and the method is very convenient for industrialization.

The application discloses a kind of temperature-resistant salt-tolerant slow swelling microspheres based on double emulsion and preparation method and application, it is related to oilfield chemical technical field, preparation method includes the following steps: emulsifier is weighed and dissolved in deionized water, ultrasonic dispersion is uniformly, then acrylamide, sulfonic monomer, hydrophobic monomer, polyoxyethylene ether functional monomer, di-vinyl benzene and initiator are added into the dispersion solution of emulsifier respectively, and water phase is prepared by stirring, water phase is slowly added into inner oil phase, and oil-in-water primary emulsion is obtained by high-speed stirring, then oil-in-water primary emulsion is added into outer oil phase and stirred to obtain double emulsion.Double emulsion is deoxidized by nitrogen, and the product is collected after aging at room temperature after stirring polymerization, washed, air-dried to constant weight, and temperature-resistant salt-tolerant slow swelling microspheres are obtained;In the application, the temperature-resistant salt-tolerant slow swelling microspheres prepared based on double emulsion template have spatial isolation effect of annular liquid film, the amphiphilic environment of emulsion provides multiphase reaction space for the synthesis of microspheres, and the microspheres have uniform particle size and excellent dispersity.

The invention belongs to the technical field of nuclear pollution decontamination, and particularly discloses a strippable decontamination material with a uranium developing and tracing function as well as a preparation method and application of the strippable decontamination material with the uranium developing and tracing function. The strippable decontamination material is prepared by taking polyvinyl alcohol (PVA) and the like as film-forming base materials and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP) as a developing indicator; and an amphiphilic block copolymer PEA-b-PAA prepared by RAFT polymerization is innovatively adopted as a dispersing agent, so that the technical problems that Br-PADAP is poor in dispersity and easy to agglomerate in a water-based system are effectively solved. The material can be subjected to complexation reaction with uranium pollutants in the decontamination process, color change visible to naked eyes is generated, and visual tracing of a polluted area is achieved; meanwhile, the film-forming property is excellent, complete stripping can be achieved after curing, the decontamination rate on the surfaces of various base materials is all higher than 90%, and the detection limit on uranium can reach 0.81 * 10 <-6 > mol / cm < 2 >. The method is easy and convenient to operate, environmentally friendly and particularly suitable for rapid identification and removal of large-range uranium pollution in nuclear facility decommissioning and accident emergency.

The application discloses a high-stability small-particle-size nucleic acid-gold nanocomposite and a synthesis method thereof, and belongs to the technical field of functional nanomaterial preparation, and the synthesis method comprises the following steps: under the conditions of heating and stirring, a reducing agent solution is added into a boiling chloroauric acid aqueous solution in batches, a solution of a functional nucleic acid molecule with a PolyA sequence at the terminal is added after boiling again, an acetic acid solution is added when the color of the reaction system is changed from light pink or light purple to dark, and the high-stability small-particle-size nucleic acid-gold nanocomposite is prepared after the reaction is completed; the application provides a brand-new "one-pot" synthesis strategy, discards complicated multi-step separation operation, realizes the synthesis of gold nanoparticles and the surface nucleic acid functionalization of the gold nanoparticles in one step in the same reaction system, the preparation process is simple, the product is uniform in particle size, good in dispersity, free from a plasmon resonance absorption peak, and has excellent long-term storage stability without depending on any exogenous polymer protective agent.

The silver-coated flaky copper powder of the present application is such that the volume cumulative particle diameter at the cumulative volume 90% by volume based on the laser diffraction scattering type particle size distribution measurement method is set as D 90 (μm), the volume cumulative particle diameter at the cumulative volume 10% by volume is set as D 10 (μm), the value of the dispersity defined by L* with respect to D 90 / D 10 is 13 or more. The silver-coated flaky copper powder is produced by the following method: a dispersion liquid containing a copper parent powder and a first complexing agent is treated by a medium agitation mill device to deform copper parent particles constituting the copper parent powder into flaky shape; the aforementioned copper parent powder containing the aforementioned copper parent particles deformed into flaky shape is treated with an aqueous liquid containing silver ions and a second complexing agent to cause silver to precipitate on the surface of the aforementioned copper parent particles.

The present application belongs to the field of biomedical detection, and particularly relates to a magnetic molecularly imprinted material for detecting various pollutants and a detection method. The present application coats magnetic Fe3O4 material with inorganic SiO2, and then coats the inorganic SiO2 with a layer of organic-inorganic hybrid SiO2 nanoparticles. Through high-temperature treatment, pores are formed on the surface of the organic-inorganic hybrid SiO2 nanoparticles, thereby improving the adsorption of target objects. Then, the SiO2@Fe3O4 material with good dispersity is obtained through activation and dispersion treatment. Finally, a molecular imprinting layer is introduced on the surface of the modified magnetic SiO2@Fe3O4 material to form the magnetic molecularly imprinted material. The material is combined with solid-phase extraction technology to realize the extraction of pollutants in urine. Then, the pollutants are detected through high-performance liquid chromatography. The method effectively reduces the interference of impurities and improves the accuracy of quantification, so that the detection of trace pollutants is more sensitive.

The invention discloses a multi-component co-permeation slurry and a preparation method and application thereof, the multi-component co-permeation slurry comprises a component A and a component B, the weight percentage ratio of the component A to the component B is 70-95%: 5-30%; the component A is prepared from the following raw materials in percentage by weight: 15 to 50 percent of first organic solvent, 2 to 5 percent of surfactant, 5 to 20 percent of dispersing agent, 3 to 10 percent of permeation promoter and 15 to 70 percent of nano diamond powder; the component B is prepared from the following raw materials in percentage by weight: 15 to 50 percent of first organic solvent, 2 to 5 percent of surfactant, 5 to 20 percent of dispersing agent, 3 to 10 percent of permeation promoter and 15 to 70 percent of nano diamond powder; the permeation promoter is selected from at least one of pure Fe powder, pure Ni powder, pure Ti powder and La2O3 powder; the component B is prepared from the following raw materials in percentage by weight: 10 to 30 percent of silicon source, 50 to 80 percent of second organic solvent, 5 to 10 percent of resin and 5 to 10 percent of corresponding curing agent. The steel hardness and the infiltrated layer depth can be remarkably improved, the dispersity of the nano-diamond and the slurry stability are improved, the process is simple and convenient, the cost is low, industrial application is facilitated, the binding force and durability of the infiltrated layer are enhanced, and the method has wide applicability and is environmentally friendly.

The invention belongs to the technical field of preparation of layered double hydroxides, and particularly relates to a double-metal hydroxide material and a preparation method thereof. In order to solve the key technical problem that large-size organic anions are difficult to insert between LDHs (Layered Double Hydroxides), the invention provides a step-by-step intercalation reconstruction method based on an electrostatic assembly mechanism, and finally, a double-metal hydroxide material with high-layer spacing can be obtained. The preparation method comprises the following steps: performing ultrasonic stripping to obtain LDHs nanosheets with high dispersity, introducing macromolecular organic anions subjected to deprotonation treatment, realizing organic molecule intercalation under the driving of electrostatic interaction, and meanwhile, assisting with a mild structure reconstruction process, so as to construct the LDHs material with obviously increased interlayer spacing. Compared with a traditional coprecipitation method or a calcination reconstruction method, the method has the advantages that the interlayer size of LDHs is remarkably increased, the interlayer spacing is larger than 12 angstroms and even 17.4 angstroms, and the bottleneck of regulation and control of the interlayer structure by organic molecule size limitation is broken through.

The invention relates to the technical field of quality analysis, in particular to a high-dispersity barite powder quality evaluation method and system based on big data, and the method comprises the following steps: obtaining a particle size distribution spectral line, a microstructure image and an oil absorption curve, calculating a detail coefficient by using a sliding window to obtain multiple peaks and smoothness measurement, and calculating the oil absorption curve; and identifying edge points, calculating irregularity to obtain particle size morphology characteristics, analyzing an oil absorption rate, extracting an initial peak value and a saturation amount to obtain oil absorption characteristics, splicing into a high-dimensional vector, and inputting the high-dimensional vector into a gradient boosting tree to predict yield stress and a shear thinning index. The method comprises the following steps: acquiring particle size distribution spectral line data, a microstructure image and an oil absorption dynamic curve, calculating spectral line detail coefficient change frequency and sum, extracting contour perimeter square to area ratio, representing particle irregularity, analyzing oil absorption rate and saturation amount, constructing a high-dimensional feature vector, and performing iterative residual fitting and nonlinear mapping to obtain an oil absorption dynamic curve. And the yield stress and the shear thinning index are accurately predicted.

The application discloses a polymer modified cyclodextrin MOFs material and a preparation method and application thereof, the material comprises cyclodextrin MOFs and a polymer modified on the cyclodextrin MOFs; the polymer comprises polystyrene-maleic anhydride formed by styrene units and maleic anhydride units. The composite material is good in dispersity, has a particle size in a nanometer scale range and a more concentrated distribution, and is favorable for forming a uniform and stable coating interface. The application constructs an open tube capillary electrochromatography (OT-CEC) / CEC separation system by preparing the composite material into a coating dispersion liquid, introducing into a capillary and forming a coating stationary phase on an inner wall. In a buffer system containing a surfactant SDS, chiral separation of amino acid enantiomer derivatives can be realized. The method is relatively simple in steps, easy to repeat and prepare, has potential chiral analysis and separation application values, and can be used for separation and detection of amino acids and related chiral drug molecules.

The invention discloses a medical high-purity nano cerium oxide-based suspension as well as a preparation method and application thereof. The mass concentration of the cerium oxide-based particles in the suspension is 1-200mg / L, the chemical general formula of the cerium oxide-based particles is CexM1-xO alpha D delta, M is a cation doped element, D is an anion doped element or group, x is more than 0 and less than or equal to 1.0, alpha is more than 1.0 and less than or equal to 2.0, delta is more than or equal to 0 and less than or equal to 0.2, and the cerium oxide-based particles Ce < 3 + > in the suspension account for 25-55% of the total Ce in percentage by mass; the average primary particle size of the cerium oxide-based particles is 3-50 nm, and the dispersity of the cerium oxide-based particles in the suspension is less than 0.7. The suspension prepared by the method is high in trivalent cerium content, high in oxygen vacancy content and high in biological activity and safety, and the preparation method is low in cost, stable in technical route, free of biological harmful additives and easy for large-scale industrial production.

The invention discloses a preparation method and application of AgBiX2 nanocrystals, and belongs to the technical field of nanomaterial preparation. According to the preparation method, a thiol organic reagent is adopted to replace a traditional virulent or expensive precursor in a green mode, low-toxicity, low-temperature and efficient dissolution of an X source is achieved, and the AgBiX2 (X: S, Se) nanocrystal which is controllable in shape, good in dispersity and stable in air is successfully prepared through a thermal injection reaction; according to the method, the reaction process is simple, and the defects of the existing method in safety, cost and process are overcome; more importantly, the AgBiX2 is applied as the electromagnetic wave absorbent for the first time, and experiments show that after being compounded with a carbon material, the AgBiX2 shows extremely strong absorption characteristics, wide effective absorption bandwidth and thin matching thickness in the frequency band of 2-18 GHz, and has huge application potential in the aspects of electromagnetic shielding and stealth coatings.

The application discloses a preparation method and application of superfine powder material; the method is characterized by optimizing the process of preparing granular material by means of spray combustion method through micro-explosion technology, so as to improve the spray combustion method, solve the problems of great difficulty in solvent atomization and few available precursors, improve and perfect the powder material processing means, and improve the performance of the obtained powder material product. The superfine powder material preparation method is simple in preparation process, few in steps and easy to synthesize, the prepared powder material is small in particle size, large in specific surface area and good in dispersity, and can be further used for preparing high-value-added products.

The invention discloses modified zinc sulfide, a polymer composition and a preparation method and application of the polymer composition, and the modified zinc sulfide comprises the following components in parts by weight: a zinc sulfide matrix; 0.01-0.03 wt% of one or more of cobalt, thulium, tin and antimony elements; 0.1 to 10 weight percent of zirconium dioxide is used for adsorption or loading; and calcining in a sulfur-containing atmosphere, and coating the surface with 0.1-2.0 wt% of an organic surface modifier. According to the modified zinc sulfide disclosed by the invention, through crystal phase regulation and control, doping modification and surface treatment, the dispersity and thermal stability are improved, hydrolysis is inhibited, and the industrial applicability of the modified zinc sulfide is improved.