14 results about "Chromium atom" patented technology

[Problem] To provide a polarizing plate, a polarizing plate, a polarizing plate with an optical layer, an image display panel, and an image display device capable of suppressing a change in hue of the polarizing plate in a high-temperature environment. [Solution] A polarizer (1) is formed from a polyvinyl alcohol-based resin film and contains potassium atoms and at least one type of atom selected from the group A below, and the total content of the at least one type of atom selected from the group A below as determined by elemental analysis is 0.10 mass% or more. The atom is bonded to the hydroxyl group of the polyvinyl alcohol, thereby suppressing a dehydration reaction and further suppressing polyenation. Group A: atoms belonging to alkali metals (except potassium atoms), atoms belonging to alkaline earth metals, aluminum atoms, and chromium atoms.

A display substrate according to an embodiment includes a substrate including chromium and iron, wherein the substrate includes a surface portion defined as a depth region of 5 nm depth in a thickness direction from a surface of the substrate, and a central portion, and a ratio of chromium atoms to iron atoms (Cr / Fe) of the surface portion is greater than a ratio of chromium atoms to iron atoms (Cr / Fe) of the central portion.

A lead wire for a nonaqueous electrolyte battery according to the present disclosure is provided with: a conductor; and one or more layers of insulating films that cover at least a portion of the outer peripheral surface of the conductor, the conductor having a conductor coating that covers at least a portion of the surface, the conductor coating containing a metal element and a trivalent chromium compound containing chromium hydroxide, the ratio of the number of chromium atoms contained in the chromium hydroxide to the number of chromium atoms contained in the trivalent chromium compound in the outermost surface of the conductor coating film is 0.40-0.85, and the insulating film has an innermost layer laminated on the surface of the conductor coating film. The innermost layer is mainly composed of a resin component containing maleic anhydride-modified polypropylene, and the acid modification rate of the resin component is 0.02 mass% or more and 0.50 mass% or less.

The invention belongs to the technical field of resistance alloys, and particularly relates to a chromium-silicon resistance alloy and a preparation method thereof. According to the method, the CrSi2 alloy and the chromium powder serve as raw materials, mechanical alloying and vacuum heat treatment are adopted, the CrSi2 alloy and the chromium powder are subjected to ball milling and mixing and then subjected to heat treatment, so that chromium atoms are diffused into a CrSi2 phase, a solid diffusion reaction is carried out, the chromium-silicon proportion in the chromium-silicon alloy is flexibly regulated and controlled by regulating and controlling the CrSi2 alloy and the chromium powder, and the chromium-silicon alloy is prepared. And various chromium-silicon resistance alloys with different atomic ratios from silicon-rich to chromium-rich are prepared. The prepared chromium-silicon resistance alloy material can be applied to the fields of precision resistors and the like.

The invention discloses a preparation method and application of a chromium-doped fullerene C20 catalyst. According to the invention, fullerene C20 is used as a carrier, chromium atoms are efficiently introduced into a carbon cage structure of fullerene C20 through chemical doping, and a stable active center with a strong electron coupling effect is successfully constructed. The method specifically comprises the following steps: dispersing fullerene C20 in toluene, carrying out ultrasonic treatment, adding chromium trichloride, carrying out a doping reaction under nitrogen protection, and carrying out centrifugation, washing and drying to obtain the target catalyst. The catalyst shows excellent performance in the reaction of catalyzing carbon dioxide hydrogenation to prepare formic acid, under the mild condition, the highest carbon dioxide conversion rate can reach 90.2%, the highest formic acid yield can reach 92.6%, and the catalytic activity retention rate is still 91.7% or above after the catalyst is recycled five times. The process is simple, the prepared catalyst has the advantages of high activity, high selectivity and high stability, and a new material is provided for efficient resource utilization of carbon dioxide.

This disclosure relates to a low-carbon alkane catalyst, its preparation method, and its application. The catalyst includes an alumina support and an active component and an auxiliary component supported on the alumina support. The active component includes chromium oxide, and the auxiliary component includes an oxide containing a first metal element and an oxide containing a second metal element. The first metal element includes one or more elements from Group IIIA and / or Group IVB; the second metal element includes any two or more elements from Group VIII, Group IB, Group IIB, Group IIIB, and Group VIIB. The catalyst of this disclosure incorporates specific metal elements, controls the ratio of chromium atoms to the first metal element and the second metal element in the catalyst to be 1:(0.05~2):(0.05~2), and controls the calcination temperature during the preparation process to be between 780 and 1000 °C. o C, to achieve the Cr species in chromium oxides in the catalyst. 3+ Cr 6+ The peak area ratio is 0.6~9, which improves the catalyst activity and the yield of dehydrogenation of low-carbon alkanes to olefins.

The present invention provides a member which makes is possible to obtain excellent residue defect inhibition properties and excellent bridge defect inhibition properties of a chemical liquid in a case where the member is brought into contact with the chemical liquid. The present invention also provides a container, a chemical liquid storage body, a reactor, a distillation column, a filter unit, a storage tank, a pipe line, and a chemical liquid manufacturing method. The member according to an embodiment of the present invention is a member that will be brought into contact with a chemical liquid. A surface of the member is constituted with stainless steel containing chromium atoms and iron atoms. In a case where an atomic ratio of the chromium atoms to the iron atoms is measured from the surface of the member to a position 10 nm below the surface in a depth direction, a maximum value of the atomic ratio is found in a region extending 3 nm from the surface of the member in the depth direction. The maximum value is 0.5 to 3.0, and an average surface roughness of the surface of the member is equal to or lower than 10 nm.

The invention relates to the technical field of material surface treatment, in particular to a salt bath chromium plating method for the surface of diamond powder. By adopting a composite chloride system with magnesium chloride as a main component and alkali metal chloride as an auxiliary component, a low-melting-point co-melt can be formed in the salt bath chromium plating process, the melting point can be reduced to 700 DEG C or below, the process temperature of salt bath chromium plating is remarkably reduced, meanwhile, the molten salt flowability is optimized, and the salt bath chromium plating quality is improved. It is ensured that chromium atoms are evenly diffused in the fused salt and chemically react with carbon atoms on the surface of the diamond to generate a uniform and compact chromium carbide layer, and heat damage to the diamond is effectively avoided; the chlorate powder is low in cost, easy to obtain and free of toxicity, harmful substances cannot be generated in the salt bath chromium plating process, the environmental protection property is good, the bottlenecks of high temperature, high consumption and uneven plating of traditional salt bath chromium plating are broken through, a low-cost and high-reliability surface modification technology is provided for the diamond / metal composite material, and the application prospect is wide. And the large-scale application of the diamond in the fields of electronic packaging and thermal management is directly promoted.

A cubic boron nitride sintered material includes: 70 volume % or more and 99 volume % or less of a cubic boron nitride grains; and a binder, wherein the binder includes a first compound including chromium, cobalt and carbon, tungsten carbide, cobalt, and aluminum, and in the first compound, a ratio NCr / (NCr+NCo) of the number NCr of atoms of the chromium to a sum of the number NCr of the atoms of the chromium and the number NCo of atoms of the cobalt is 0.10 or more and 0.90 or less.

Provided is a cubic boron nitride sintered compact comprising cubic boron nitride particles in the amount of 70-99 vol%, and a binder. The binder comprises: a first compound containing chromium, cobalt, and carbon; tungsten carbide; cobalt; and aluminum. In the first compound, the ratio NCr / (NCr+NCo) of the number of chromium atoms NCr to the total of the number of chromium atoms NCr and the number of cobalt atoms NCo is 0.10-0.90.

A photomask blank having a substrate; and a multilayer film including a first layer, a second layer, and a third layer. The first layer contains 43 at % or less chromium, 32 at % or more oxygen, 25 at % or less nitrogen and 5 at % or more and 18 at % or less carbon and has a thickness of 8 nm or more and 16 nm or less. The second layer contains 66 at % or more and 92 at % or less chromium and 8 at % or more and 30 at % or less nitrogen and has a thickness of 50 nm or more and 75 nm or less. The third layer contains 44 at % or less chromium, 30 at % or more oxygen and 28 at % or less nitrogen and has a thickness of 10 nm or less. A surface roughness Rq of the multilayer film is 0.65 nm or less.

The invention relates to the technical field of power generation boiler metal material application, and discloses an oxide skin inhibition method and application of high-chromium heat-resistant steel for a boiler high-temperature steam pipeline, and the oxide skin inhibition method comprises the following steps: optimally designing alloy components, taking the high-chromium heat-resistant steel as a base material, and adding specific alloy elements to form a synergistic effect, for example, chromium forms a continuous chromium-rich layer; cobalt promotes chromium atom migration to form a double-layer structure, copper improves thermal expansion matching performance, and niobium hinders oxygen ion diffusion; the service environment is dynamically regulated and controlled, adaptive steel types are selected according to the service temperature, steam parameters are controlled, and an oxidation film is monitored and repaired in real time; and an oxide layer forming and repairing process, wherein surface strengthening and steam banking treatment are combined. Starting from the material, the oxide skin grading control scheme is provided, material-working condition-maintenance three-in-one regulation and control are achieved, steam banking and online shot blasting are combined, the maintenance cost is reduced, Co / Cu alloying design is adopted, the traditional material bottleneck is broken through, and long-period operation of a high-temperature pipeline is guaranteed.

To provide a polarizer capable of suppressing a hue change of the polarizer under a high temperature environment.SOLUTION: The polarizer 1 is formed of a polyvinyl alcohol-based resin film, contains potassium atoms and at least one kind of atoms selected from the following group A, and has a total content of the at least one kind of atoms selected from the following group A determined by elemental analysis of 0.10% by mass or more. When the atom is bonded to a hydroxy group of the polyvinyl alcohol, a dehydration reaction is suppressed, and thus polyene formation is suppressed. An atom belonging to an alkali metal (excluding a potassium atom), an atom belonging to an alkaline earth metal, an aluminum atom, and a chromium atom SELECTED DRAWING: Figure 1

The application discloses a kind of full same chromium atomic cluster and its self-assembly method and application, comprising the following steps: preparation Cr x NbSe2 Single crystal;Fix the single crystal to the sample holder, and fix the ceramic rod on the surface of the single crystal far from the sample holder on one side, place the assembled sample in an ultrahigh vacuum cavity, and impact the ceramic rod by external force to realize sample cleavage, then transfer the cleaved sample in situ to the scanning tunneling microscope cavity, and perform temperature reduction and surface morphology characterization. The application successfully realizes the self-assembly of large-area chromium atomic clusters by using single crystal cleavage technology, the cluster size is consistent and uniformly distributed, has extremely high chemical and structural stability, and the sample size can reach centimeter level, which lays a foundation for the application of magnetic atomic clusters in new generation semiconductor devices.