-
1.发明公开
公开(公告)号：EP3888787A1
公开(公告)日：2021-10-06
申请号：EP20861253.1
申请日：2020-09-04
申请人： Grirem Advanced Materials Co., Ltd. , Rare Earth Functional Materials (Xiong'An) Innovation Center Co., Ltd , Grirem Hi-Tech Co., Ltd.
发明人： HUANG, Xiaowei , ZHANG, Yongqi , LI, Hongwei , ZHAI, Zhizhe , ZHONG, Qiang , ZHANG, He , CUI, Meisheng , HOU, Yongke , WANG, Hao , FENG, Zongyu
摘要： The present invention discloses a rare-earth-manganese/cerium-zirconium-based composite compound, a method for preparing the same, and a use thereof. The composite compound is of a core-shell structure with a general formula expressed as: A RE c B a O b -(1-A)Ce x Zr (1-x-y) M y O 2-z , wherein 0.1≤A≤0.3, preferably 0.1≤A≤0.2; a shell layer has a main component of rare-earth manganese oxide with a general formula of RE c Mn a O b , wherein RE is a rare-earth element or a combination of more than one rare-earth elements, and B is Mn or a combination of Mn and a transition metal element, 1≤a≤8, 2≤b≤18, and 0.25≤c≤4; and a core has a main component of cerium-zirconium composite oxide with a general formula of Ce x Zr (1-x-y )M y O 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.
-
2.发明公开
公开(公告)号：EP4450477A1
公开(公告)日：2024-10-23
申请号：EP23752463.2
申请日：2023-02-13
申请人： Grirem Hi-Tech Co., Ltd. , Grirem Advanced Materials Co., Ltd. , Rare Earth Functional Materials (Xiong'An) Innovation Center Co., Ltd.
发明人： HUANG, Xiaowei , YANG, Juanyu , WANG, Ning , FENG, Zongyu , DU, Lei , ZHENG, Yuanyuan , LIU, Yanxiao , ZHANG, He
IPC分类号： C04B35/48 , C04B35/50 , C04B35/622
摘要： The present invention relates to a rare earth zirconium-based ceramic material which is doped at surface and at grain boundary 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. The rare earth zirconium-based ceramic material obtained by adopting the technical solution provided by the invention can be used in various 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.
-
3.发明公开
公开(公告)号：EP4159312A1
公开(公告)日：2023-04-05
申请号：EP21868422.3
申请日：2021-08-27
申请人： Grirem Advanced Materials Co., Ltd. , Rare Earth Functional Materials (Xiong'An) Innovation Center Co., Ltd , Grirem Hi-Tech Co., Ltd.
发明人： HUANG, Xiaowei , HOU, Yongke , ZHAO, Zheng , ZHANG, Yongqi , YANG, Juanyu , CUI, Meisheng , ZHAI, Zhizhe , XU, Yang , FENG, Zongyu , CHEN, Shilei
摘要： 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.
-
公开(公告)号：EP4451406A1
公开(公告)日：2024-10-23
申请号：EP23752464.0
申请日：2023-02-13
申请人： Grirem Advanced Materials Co., Ltd. , Rare Earth Functional Materials (Xiong'An) Innovation Center Co., Ltd. , Grirem Hi-Tech Co., Ltd.
发明人： HUANG, Xiaowei , ZHANG, Xiaobao , YANG, Juanyu , WANG, Ning , FENG, Zongyu , XU, Yang , ZHONG, Qiang , XIAO, Yiyang
IPC分类号： H01M10/0562
摘要： The present invention relates to a solid electrolyte of lithium-lanthanum-zirconium composite oxide which is doped at surface and at grain boundary, 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.
-
5.发明公开
公开(公告)号：EP4450158A1
公开(公告)日：2024-10-23
申请号：EP23752465.7
申请日：2023-02-13
申请人： Grirem Hi-Tech Co., Ltd. , Rare Earth Functional Materials (Xiong'An) Innovation Center Co., Ltd. , Grirem Advanced Materials Co., Ltd.
发明人： ZHAO, Zheng , HUANG, Xiaowei , ZHANG, Yongqi , HOU, Yongke , FENG, Zongyu , ZHAO, Yuxin , XU, Yang
摘要： The present invention relates to a catalyst with noble metal loaded at surface and at grain boundary, preparation method and application thereof, wherein 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.
-
6.发明公开
公开(公告)号：EP4450156A1
公开(公告)日：2024-10-23
申请号：EP23752462.4
申请日：2023-02-13
申请人： Grirem Advanced Materials Co., Ltd. , Grirem Hi-Tech Co., Ltd. , Rare Earth Functional Materials (Xiong'An) Innovation Center Co., Ltd.
发明人： HUANG, Xiaowei , CUI, Meisheng , HOU, Yongke , ZHANG, Yongqi , FENG, Zongyu , YANG, Juanyu , XU, Zihao
摘要： The invention relates to a cerium-zirconium composite oxide which is doped at surface and at grain boundary and a preparation method and use thereof. Some of 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, oxygen migration capability is increased, 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, reduce the consumption 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 and the like.
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.015 秒)
