Cerium oxide-based polishing powder, a preparation method, a polishing solution, and a use. The cerium oxide-based polishing powder comprises porous secondary particles assembled from a plurality of primary grains, the primary grain has a pore diameter of 2-30 nm, a pore volume of 0.10-0.50 cm3/g, and a specific surface area of 10-80 m2/g, the content of surface trivalent cerium accounts for 10%-40% of a total content of surface cerium. Microstructures of the cerium oxide-based polishing powder of the present invention are porous cerium oxide-based particles assembled by nano-primary particles. The self-assembly structure enables the cerium oxide-based polishing powder to have a high specific surface area while having a high content of surface trivalent cerium, so that a high polishing rate is achieved. The sub-micron particle size improves the dispersion of the polishing powder in a polishing slurry. The porous structure reduces the Young's modulus of the polishing powder, so that the polishing powder is not prone to cracking in a polishing process, the surface accuracy of a polished workpiece is improved, and the service life of the polishing powder is prolonged. Therefore, the cerium oxide-based polishing powder provided by the present invention has both an excellent polishing rate and polishing accuracy, and has a long service life.
A surface-modified oxide solid electrolyte powder, a composite solid electrolyte, and a preparation method therefor. A surface of the surface-modified oxide solid electrolyte powder contains a first preset functional group. Oxide solid electrolytes include crystalline electrolytes and composites thereof, and amorphous electrolytes and composites thereof. The composition of the composite solid electrolyte comprises the surface-modified oxide solid electrolyte powder, a lithium salt, and a polymer containing an ether bond, and a surface of the composite solid electrolyte contains a second preset functional group. By modifying the surface of the oxide solid electrolyte powder, a chemical reaction is carried out between the oxide solid electrolyte powder and the polymer, so that the interfacial compatibility of the oxide solid electrolyte powder and the polymer is improved, the transfer uniformity of lithium ions in the composite solid electrolyte is improved, the ionic conductivity, mechanical properties, and thermal stability of the composite solid electrolyte are improved, the growth of lithium dendrites in the composite solid electrolyte is inhibited, and the safety performance is improved.
H01M 12/06 - Hybrid cellsManufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type with one metallic and one gaseous electrode
3.
GRAIN BOUNDARY AND SURFACE-DOPED RARE EARTH MANGANESE-ZIRCONIUM COMPOSITE COMPOUND AND PREPARATION METHOD AND USE THEREOF
Disclosed are a grain boundary and surface-doped rare earth manganese-zirconium composite compound as well as a preparation method and use thereof. A rare earth manganese oxide with a special structure is formed at grain boundary and surface of a rare earth zirconium-based oxide by a grain boundary doping method so as to increase oxygen defects at the grain boundary and the surface, thereby increasing the amount of active oxygen, improving the catalytic activity of the rare earth manganese-zirconium composite compound, inhibiting high-temperature sintering of the rare earth manganese-zirconium composite compound, and improving the NO catalytic oxidation capability. When the rare earth manganese-zirconium composite compound is applied to a catalyst, the consumption of noble metal can be greatly reduced.
Disclosed are a grain boundary and surface-doped rare earth zirconium-based ceramic material and a preparation method and application thereof, and part of doped elements are positioned at the grain boundary and surface of the rare earth zirconium-based ceramic material by a step-by-step doping method. The sintering activity of the rare earth zirconium-based ceramic material can be changed by adjusting the type and content of doping elements at the grain boundary and the surface, thereby enabling the control of the grain size and the grain boundary number and characteristics of the rare earth zirconium-based ceramic material, and finally optimizing the properties, such as electrical and mechanical properties, of the material. The doping method has the advantages of simple process, low cost and high universality, and can meet the requirements of different rare earth zirconium-based ceramics on doping elements, and thus is suitable for large-scale application.
C04B 35/48 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on zirconium or hafnium oxides or zirconates or hafnates
C04B 35/626 - Preparing or treating the powders individually or as batches
5.
POROUS-STRUCTURE RARE EARTH-ALUMINUM INTERMEDIATE ALLOY ADDITIVE AND PREPARATION METHOD THEREFOR
Disclosed in the present invention are a porous-structure rare earth-aluminum intermediate alloy additive and a preparation method therefor. The porous-structure rare earth-aluminum intermediate alloy additive comprises rare earth and aluminum, and the rare earth-aluminum intermediate alloy additive is of a porous structure; the weight percentages of components are: rare earth: 1.0%-97.5%, aluminum: 2.5%-99.0%, O<0.02%, C<0.03%, P<0.01%, and S<0.01%; the density is 2.70 g/cm3-8.84 g/cm3, and the melting point is 547°C-1150°C. By using the porous-structure rare earth-aluminum alloy additive, the contact area between the additive and an aluminum alloy melt can be expanded, the dissolution rate of the additive is increased, the buoyancy and viscous resistance of the additive in the melt are improved, the technical problem that an intermediate alloy additive rapidly sinks to the bottom due to its own high density is solved, and thus rare earth elements are more uniformly distributed in the aluminum alloy melt.
Disclosed in the present invention is a rare earth-containing additive. The additive comprises: rare earth metal and iron, wherein the content of the rare earth metal is 5 wt%-90 wt%, and the content of the iron is 10 wt%-95 wt%. The additive has a density of 6.3 g/cm3-8.4 g/cm3, a melting point of 850°C-1450°C, an oxygen content of ≤150 ppm, a maximum size of inclusions of ≤35 μm, and a total amount of inclusions of ≤0.5 wt%. The density, melting point and shape of the additive containing the rare earth and the iron are regulated, so that an applicable component window for the additive is increased, the speed at which the additive passes through an upper slag layer during addition of the additive to molten steel is increased, the viscous resistance of the molten steel to the additive is effectively reduced, the influence of the slag layer is eliminated, the feeding depth of the rare earth-containing additive is increased, and the addition depth of the additive is effectively increased, thereby improving the rare earth yield and the distribution uniformity.
Disclosed are a grain boundary and surface-loaded noble metal catalyst, a preparation method and an application thereof. The noble metal is dispersed at the grain boundary and surface of alumina and/or a rare earth manganese-zirconium composite oxide to form a multiphase interface, which achieves the following beneficial technical effects: firstly, the multiphase interface has a larger steric hindrance and a stronger anchoring effect, which can inhibit the migration, agglomeration, and growth of the noble metal at high temperatures, increase the high-temperature stability and catalytic performance of the noble metal, and reduce the usage of the noble metal; secondly, the multiphase interface exhibits a synergistic catalytic effect, which can reduce the activation energy of lattice oxygen and increase the quantity of active oxygen, thereby enhancing the NO oxidation and low-temperature catalytic activity.
Disclosed are a grain boundary- and surface-doped lithium-lanthanum-zirconium composite oxide solid electrolyte, a preparation method therefor, and an application thereof. Part of doping elements are step-doped at the grain boundary and the surface of the lithium-lanthanum-zirconium composite oxide solid electrolyte to improve the distribution state of the doping elements at the grain boundaries, reduce the number of grain boundaries, lower the grain boundary resistance of the lithium-lanthanum-zirconium composite oxide, thereby obtaining high ionic conductivity. The doping method has the advantages of being simple and convenient in process, low in cost and high in universality, can meet the requirements of different solid electrolytes on doping elements, and is suitable for large-scale application. The solid electrolyte obtained from the technical solution of the present application can be used in fields such as all-solid-state lithium or lithium ion batteries, semi-solid lithium ion batteries, lithium air batteries and the like.
Disclosed in the present invention is a rare earth-containing additive and a preparation method therefor. The rare earth-containing additive comprises a closed shell and a plurality of intermediate alloys arranged in the shell, wherein the intermediate alloys contain rare earth elements, and the shell is filled with a gas of preset pressure. By means of a gas-solid two-phase structure sealed in the shell of the additive, after liquid steel is added to the additive, as the wall of the shell thins, the gas will break through the shell to push the internal solid additive in every direction, improving the uniformity of rare earth distribution and the rare earth yield in a final product.
The present disclosure provides a cerium-zirconium-based composite oxide with a core-shell structure and a preparation method thereof, a catalyst system using the cerium-zirconium-based composite oxide, a catalytic converter for purifying tail gas by using the catalyst system, and application of the catalyst system or the catalytic converter in motor vehicle exhaust purification, industrial waste gas treatment or catalytic combustion. In the present invention, the cerium-zirconium-based composite oxide with a core-shell structure oxygen storage material is prepared by a step-by-step precipitation method. On the one hand, yttrium and a part of zirconium and cerium are precipitated on a cerium-zirconium surface, where the post-precipitation of yttrium is to segregate yttrium ions (Y3+) on a grain boundary surface, thus reducing lattice surface energy, pinning the grain boundary surface, making the migration of the grain boundary surface difficult, controlling the growth of grains.
The present invention relates to a grain boundary and surface-doped cerium-zirconium composite oxide and a preparation method therefor and an application thereof. Some or all of doping elements of the cerium-zirconium composite oxide are located at the grain boundary and the surface of the cerium-zirconium composite oxide, so that the number of defects and vacancies of the cerium-zirconium composite oxide is increased, an oxygen migration capability is improved, and good high temperature stability is achieved. The cerium-zirconium composite oxide can inhibit the migration, agglomeration and growth of noble metal particles, enhance the high temperature stability of a noble metal catalyst, and reduce the amount of use of noble metal, and can be applied to the fields of motor vehicle exhaust purification, natural gas catalytic combustion, organic waste gas purification, industrial flue gas denitrification treatment, etc.
RARE EARTH FUNCTIONAL MATERIALS (XIONG'AN) INNOVATION CENTER CO., LTD. (China)
Inventor
Hou, Yongke
Huang, Xiaowei
Cui, Meisheng
Zhang, Yongqi
Zhao, Zheng
Zhai, Zhizhe
Chen, Dongming
Abstract
The present invention relates to a catalyst for loading a noble metal on a grain boundary and a surface, a preparation method therefor, and the use thereof. The catalyst is used to load a noble metal on a grain boundary and a surface of an active coating containing aluminum oxide and/or a cerium-zirconium composite oxide, thereby improving the anchoring effect of the noble metal, avoiding the migration, agglomeration and growth of noble-metal particles, maintaining the catalytic activity and high-temperature stability performance of a noble-metal catalyst, and reducing the amount of noble metal used.
The present invention relates to a grain-boundary- and surface-doped rare-earth zirconium-based ceramic material, a preparation method therefor, and the use thereof. Some doping elements are located at the grain boundary and the surface of a rare-earth zirconium-based ceramic material by means of a step-by-step doping method. The sintering activity of the rare-earth zirconium-based ceramic material can be changed by adjusting the types and contents of the doping elements at the grain boundary and the surface, such that the grain size, the grain boundary number and the properties of the rare-earth zirconium-based ceramic material are adjusted, and the electrical, mechanical and other properties of the material are ultimately optimized. The doping method used has the advantages of having a simple and convenient process, being low cost and having strong universality; can meet the requirements of different rare-earth zirconium-based ceramics for doping elements; and is suitable for large-scale application. The rare-earth zirconium-based ceramic material obtained by using the technical solution of the present invention can be used in different fields such as grinding media, optical fiber connectors, mobile phone backboards, dental materials, biological ceramics, thermal barrier coatings, oxygen sensors or nitrogen-oxygen sensors, and solid oxide fuel cells.
C04B 35/48 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on zirconium or hafnium oxides or zirconates or hafnates
C04B 35/50 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare earth compounds
C04B 35/622 - Forming processesProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products
14.
GRAIN BOUNDARY- AND SURFACE-DOPED LITHIUM-LANTHANUM-ZIRCONIUM COMPOSITE OXIDE ELECTROLYTE, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF
RARE EARTH FUNCTIONAL MATERIALS (XIONG'AN) INNOVATION CENTER CO., LTD. (China)
GRIREM HI-TECH CO., LTD. (China)
Inventor
Huang, Xiaowei
Zhang, Xiaobao
Yang, Juanyu
Wang, Ning
Feng, Zongyu
Xu, Yang
Zhong, Qiang
Xiao, Yiyang
Abstract
The present invention relates to a grain boundary- and surface-doped lithium-lanthanum-zirconium composite oxide solid electrolyte, a preparation method therefor, and an application thereof. Part of doping elements are step-doped at the grain boundary and the surface of the lithium-lanthanum-zirconium composite oxide solid electrolyte to improve the distribution state of the doping elements at the grain boundaries, reduce the number of grain boundaries, lower the grain boundary resistance of the lithium-lanthanum-zirconium composite oxide, thereby obtaining high ionic conductivity. The doping method has the advantages of being simple and convenient in process, low in cost and high in universality, can meet the requirements of different solid electrolytes on doping elements, and is suitable for large-scale application. The solid electrolyte obtained from the technical solution of the present invention can be used in fields such as all-solid-state lithium or lithium ion batteries, semi-solid lithium ion batteries, lithium-air batteries and the like.
The present invention relates to a grain boundary and surface-supported noble metal catalyst, and a preparation method therefor and application thereof. Noble metals are dispersed at the grain boundary and the surface of an aluminum oxide and/or a rare earth manganese-zirconium composite oxide to form a multiphase interface, and the following beneficial technical effects are achieved: first, the multiphase interface has large steric hindrance and a strong anchoring effect, so that the high-temperature migration, agglomeration and growth of noble metals can be inhibited, the high-temperature stability and catalytic performance of the noble metals can be improved, and the amount of use of the noble metals can be reduced; and second, the multiphase interface has a synergistic catalytic effect, so that the activation energy of lattice oxygen can be reduced, the number of reactive oxygen species can be increased, and the NO oxidation rate and low-temperature catalytic activity can be improved.
The present invention relates to a grain boundary and surface doped rare earth manganese-zirconium composite compound as well as a preparation method therefor and the use thereof. A rare earth manganese oxide having a special structure is formed at a grain boundary and a surface of a rare earth zirconium-based oxide by means of a grain boundary doping method so as to increase oxygen defects at the grain boundary and the surface, thereby increasing the amount of active oxygen, improving the catalytic activity of the rare earth manganese-zirconium composite compound, inhibiting high-temperature sintering and improving the NO catalytic oxidation capability thereof. When the rare earth manganese-zirconium composite compound is applied to a catalyst, the use amount of a precious metal can be greatly reduced.
xyza33. Under excitation of ultraviolet light, purple light, blue light, and red light, the light-emitting material can generate efficient wide-spectrum emission having a peak wavelength of 780-1,000 nm or efficient narrow-band near-infrared light emission having a peak wavelength greater than 1,000 nm. The present invention has a great application prospect in the fields of food testing, security monitoring, standard light sources, healthy illumination, etc.
Rare Earth Functional Materials (Xiong'an) Innovation Center Co., Ltd. (China)
GUOKE RE ADVANCED MATERIALS CO., LTD. (China)
Inventor
Yu, Jinqiu
Luo, Liang
Diao, Chengpeng
Cui, Lei
Wu, Hao
He, Huaqiang
Abstract
0.1. The rare earth halide scintillating material involved in the present invention has excellent scintillation properties of high light output, high energy resolution, and fast decay.
Rare Earth Functional Materials (Xiong'an) Innovation Center Co., Ltd. (China)
GRIREM HI-TECH CO., LTD. (China)
Inventor
Huang, Xiaowei
Zhang, Yongqi
Li, Hongwei
Zhai, Zhizhe
Zhong, Qiang
Zhang, He
Cui, Meisheng
Hou, Yongke
Wang, Hao
Feng, Zongyu
Abstract
2-z, wherein M is one or more non-cerium rare-earth elements, 0.1≤x≤0.9, 0≤y≤0.3, and 0.01≤z≤0.3. The composite compound enhances an oxygen storage capacity of a cerium-zirconium material through an interface effect, thereby increasing a conversion rate of a nitrogen oxide.
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
21.
LIGHT-EMITTING MATERIAL AND LIGHT-EMITTING DEVICE INCLUDING SAME
A light-emitting material and a light-emitting device including same. The light-emitting material includes an inorganic compound. The inorganic compound contains an M element, an A element, an E element, and an X element, wherein the M element is selected from at least one of Ca, Sr, Ba, La, Lu, Y, Sc and Gd and the M element cannot be Ca alone, the A element is selected from at least one of Hf, Zr, Ti, Ge, Si, Al, Ga and In, the E element is selected from at least one of O, N and F and must include O, and the X element is selected from at least one of Cr, Nd, Yb, Er, Ce and Eu and must include one of Cr, Nd, Yb and Er. The inorganic compound has a perovskite-type crystal structure. The light-emitting material can be excited by a visible light spectrum to generate near-infrared light emission and has a relatively high light-emission intensity.
The present invention relates to a cerium zirconium based composite oxide with a core-shell structure and a preparation method therefor. According to the present invention, a cerium zirconium based composite oxide oxygen storage material having a core-shell structure is prepared by means of a step-by-step precipitation method. On the one hand, the post-precipitation of yttrium is used for the segregation of yttrium ions (Y3+) on a grain boundary surface, which inhibits the high-temperature sintering phenomenon of the cerium zirconium based composite oxide, so as to improve the thermal stability of the cerium zirconium based composite oxide, and the post-precipitation of part of the zirconium is to enhance the thermal stability; on the other hand, yttrium ions have a smaller ion radius (0.90 Å) and quantity of electric charge, which is more conducive to reducing the oxygen vacancy formation energy, and improving the oxygen storage and release performance, so as to meet the use requirements of catalysts for motor vehicle tail gas purification, industrial waste gas treatment or catalytic combustion, etc.
The present invention relates to a cerium-zirconium-based composite oxide having gradient element distribution and a preparation method therefor. According to the present invention, the cerium-zirconium-based composite oxide having gradient element distribution is prepared by a step-by-step precipitation method. First, a zirconium-rich component is precipitated to form a crystal structure and a crystal grain stack structure which have high thermal stability, slow down the segregation of zirconium on a surface after high-temperature treatment, and reduce element migration among crystal grains; second, a cerium-rich component is precipitated to improve the cerium content of the surface layers of the crystal grains, improve the utilization rate of the cerium element, and improve the oxygen storage amount and the oxygen storage rate. The composite oxide prepared by the method has both high thermal stability and high oxygen storage performance, thus satisfying requirements of the long-time use of a catalyst containing a cerium-zirconium-based composite oxide for the thermal stability and oxygen storage performance of the cerium-zirconium-based composite oxide.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/00 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group
B01J 23/10 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of rare earths
F23G 7/07 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of specific waste or low grade fuels, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
24.
CERIUM-ZIRCONIUM-BASED COMPOSITE OXIDE HAVING GRADIENT ELEMENT DISTRIBUTION AND PREPARATION METHOD THEREFOR
The present invention relates to a cerium-zirconium-based composite oxide having gradient element distribution and a preparation method therefor. According to the present invention, the cerium-zirconium-based composite oxide having gradient element distribution is prepared by a step-by-step precipitation method. First, a zirconium-rich component is precipitated to form a crystal structure and a crystal grain stack structure which have high thermal stability, slow down the segregation of zirconium on a surface after high-temperature treatment, and reduce element migration among crystal grains; second, a cerium-rich component is precipitated to improve the cerium content of the surface layers of the crystal grains, improve the utilization rate of the cerium element, and improve the oxygen storage amount and the oxygen storage rate. The composite oxide prepared by the method has both high thermal stability and high oxygen storage performance, thus satisfying requirements of the long-time use of a catalyst containing a cerium-zirconium-based composite oxide for the thermal stability and oxygen storage performance of the cerium-zirconium-based composite oxide.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/00 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group
F23G 7/07 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of specific waste or low grade fuels, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
25.
R-T-B sintered magnet and preparation method thereof
Rare Earth Functional Materials (Xiong'an) Innovation Center Co., Ltd. (China)
Griceon (Rongcheng) Co., Ltd. (China)
Inventor
Luo, Yang
Yu, Dunbo
Zhu, Wei
Bai, Xinyuan
Lin, Xiao
Zhu, Shengjie
Wang, Zilong
Peng, Haijun
Abstract
14B grain region T3 is 80% or more. In the present invention, by optimizing a preparation process and a microstructure of a traditional rare earth permanent magnet, diffusion efficiency of heavy rare earth in the magnet is improved, such that coercivity of the magnet is greatly improved, and manufacturing cost is reduced.
H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
B22F 3/24 - After-treatment of workpieces or articles
H01F 1/22 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
1-xx3+y3+y, wherein 0.001 ≤ x ≤ 1, and 0.0001 ≤ y ≤ 0.1. The rare earth halide scintillating material involved in the present invention has excellent scintillation properties of high light output, high energy resolution, and fast decay.
3+x3+x, wherein 0.0001≤x≤0.1. The rare earth halide scintillation material has excellent scintillation properties including high light output, high energy resolution, and fast attenuation.
cabx(1-x-y)y2-zcabx(1-x-y)y2-z2-z, wherein M is one or more non-cerium rare earth elements; 0.1≤x≤0.9; 0≤y≤0.3; 0.01≤z≤0.3. The composite compound improves the oxygen storage capacity of a cerium-zirconium material by means of an interfacial effect so as to improve the conversion rate of a nitrogen oxide.
A rare earth manganese/cerium-zirconium-based composite compound, a preparation method therefor and an application thereof. The composite compound has a core-shell structure, which is as represented by a general formula: ARE cB aO b-(1-A)Ce xZr (1-x-y)M yO 2-z, wherein 0.1=A=0.3, preferably 0.1=A=0.2. The main component of a shell is a rare earth manganese oxide, which is as represented by a general formula: RE cMn aO b, wherein RE is a combination of one or more rare earth elements; B is Mn or a combination of Mn and a transition metal element; 1=a=8; 2=b=18; 0.25=c=4. The main component of a core is a cerium-zirconium composite oxide, which is as represented by a general formula: Ce xZr (1-x-y)M yO 2-z, wherein M is one or more non-cerium rare earth elements; 0.1=x=0.9; 0=y=0.3; 0.01=z=0.3. The composite compound improves the oxygen storage capacity of a cerium-zirconium material by means of an interfacial effect so as to improve the conversion rate of a nitrogen oxide.
patents
