Patents by Inventor Yijian Lai
Yijian Lai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10639722Abstract: A preparation method for a silver-metal oxide electrical contact material, comprising: (1) mixing a silver-containing precursor solution with a metal oxide precursor solution; (2) reacting a reducing agent with the mixed solution to obtain silver powder coated with a metal oxide precursor; (3) heat treating the silver powder in a non-reducing atmosphere to obtain the silver-metal oxide electrical contact material. A preparation device for a silver-metal oxide electrical contact material, a silver-metal oxide electrical contact material prepared by the preparation method, and an electrical contact prepared by the silver-metal oxide electrical contact material. The electrical contact material prepared by the preparation method is at nanoscale, significantly prolonging electrical endurance of the electrical contact.Type: GrantFiled: December 11, 2015Date of Patent: May 5, 2020Assignee: SCHNEIDER ELECTRIC INDUSTRIES SASInventors: Nan Liu, Yijian Lai, Binyuan Zhao
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Publication number: 20170333996Abstract: A preparation method for a silver-metal oxide electrical contact material, comprising: (1) mixing a silver-containing precursor solution with a metal oxide precursor solution; (2) reacting a reducing agent with the mixed solution to obtain silver powder coated with a metal oxide precursor; (3) heat treating the silver powder in a non-reducing atmosphere to obtain the silver-metal oxide electrical contact material. A preparation device for a silver-metal oxide electrical contact material, a silver-metal oxide electrical contact material prepared by the preparation method, and an electrical contact prepared by the silver-metal oxide electrical contact material. The electrical contact material prepared by the preparation method is at nanoscale, significantly prolonging electrical endurance of the electrical contact.Type: ApplicationFiled: December 11, 2015Publication date: November 23, 2017Inventors: Nan Liu, Yijian Lai, Binyuan Zhao
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Patent number: 9567689Abstract: A method of preparing nanostructured single crystal silver, comprising placing a high-conductive molded porous active carbon containing chloride ions, which has been reductively treated, into a silver-containing precursor solution. After several hours at room temperature, the nanostructured single crystal silver grows on the surface of the active carbon. The silver-containing precursors and appropriate amount of chlorine provide a crystal nucleus and a slow stable crystal growth environment which are required for single crystal silver growth, and said nanostructured silver single crystals could be obtained with various morphologies by controlling the concentration of the silver-containing precursor solution and the growth time. The method of the invention is an environmentally friendly synthesis method with the nanostructured single crystal silver grows on the surface of the molded porous active carbon at room temperature, which is pollution-free and does not need any additives.Type: GrantFiled: November 12, 2013Date of Patent: February 14, 2017Assignees: SHANGHAI JIAO TONG UNIVERSITY, SHANGHAI SWITCHDIY DIGITAL TECHNOLOGY CO., LTD.Inventors: Binyuan Zhao, Hong Zhao, Fei Wang, Yijian Lai, Yuesheng Ning, Lei Wang, Jie Zhou
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Patent number: 9437342Abstract: The present invention relates to a new method for preparing a silver-based electrical contact material, comprising following steps of: (a) providing a carbonaceous mesophase solution; (b) adding a silver source into the carbonaceous mesophase solution and stirring to obtain a compound; (c) removing a solvent from the compound to obtain a solid; (d) performing a heat treatment on the solid, and obtaining a silver-based electrical contact material. The silver source is silver powder prepared by means of a chemical method. By means of the method, a uniform carbonaceous coating on silver is implemented, the silver is uniformly distributed in a nanometer scale, and a diamond is generated in situ of a material after being sintered. The silver-based electrical contact material processed by means of this method shows an excellent mechanical wear resistance and electrical property.Type: GrantFiled: March 29, 2013Date of Patent: September 6, 2016Assignee: SCHNEIDER ELECTRIC INDUSTRIES SASInventors: Nan Liu, Binyuan Zhao, Yijian Lai
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Patent number: 9279190Abstract: The present invention relates to a method for preparing a diamond carbon membrane on a surface of stainless steel, including: immersing the pretreated stainless steel into a solution of a biomass-derived carbonaceous mesophase in ethanol for several minutes, prior to taking out and air drying; or alternatively, spraying the solution of the biomass-derived carbonaceous mesophase in ethanol onto the stainless steel surface, to provide a layer of the biomass-derived carbonaceous mesophase film adhered on the stainless steel surface upon full volatilization of the solution on the surface; and then carrying out thermal treatment under a hydrogen atmosphere, to prepare the diamond carbon membrane on the stainless steel surface.Type: GrantFiled: November 12, 2013Date of Patent: March 8, 2016Assignees: SHANGHAI JIAO TONG UNIVERSITY, SHANGHAI SWITCHDIY DIGITAL TECHNOLOGY CO., LTD.Inventors: Binyuan Zhao, Binhui Luo, Qian Mei, Yijian Lai, Yuesheng Ning, Lei Wang, Jie Zhou
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Patent number: 9249026Abstract: The present invention relates to a method for preparing graphene from a biomass-derived carbonaceous mesophase, which includes: soaking a base substance into an ethanol solution of a biomass-derived carbonaceous mesophase; after a certain period of time, taking out and drying the base substance, a layer of biomass-derived carbonaceous mesophase film being attached to the surface of the base substance; subjecting the base substance to a heat treatment under the protection of a hydrogen atmosphere, then a stacked graphene film was formed on the surface of the base substance; and further subjecting the base substance to ultrasonic dispersion in an alcohol solvent to separate the graphene film and the base substance, then a graphene alcohol was formed. The preparation process of the present invention is easy to implement. The raw material biomass-derived carbonaceous mesophase has abundant sources and is low in cost. The preparation process has low energy consumption, and is applicable to mass production.Type: GrantFiled: November 12, 2013Date of Patent: February 2, 2016Assignees: Shanghai Jiaotong University, SHANGHAI SWITCHDIY DIGITAL TECHNOLOGY CO., LTD.Inventors: Binyuan Zhao, Yuxiang Chen, Yijian Lai, Yuesheng Ning, Lei Wang, Jie Zhou, Tongxiang Fan
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Publication number: 20150132502Abstract: The present invention relates to a method for preparing a diamond carbon membrane on a surface of stainless steel, including: immersing the pretreated stainless steel into a solution of a biomass-derived carbonaceous mesophase in ethanol for several minutes, prior to taking out and air drying; or alternatively, spraying the solution of the biomass-derived carbonaceous mesophase in ethanol onto the stainless steel surface, to provide a layer of the biomass-derived carbonaceous mesophase film adhered on the stainless steel surface upon full volatilization of the solution on the surface; and then carrying out thermal treatment under a hydrogen atmosphere, to prepare the diamond carbon membrane on the stainless steel surface.Type: ApplicationFiled: November 12, 2013Publication date: May 14, 2015Applicants: Shanghai Switchdiy Digital Technology Co., Ltd., Shanghai Jiao Tong UniversityInventors: BINYUAN ZHAO, BINHUI LUO, QIAN MEI, YIJIAN LAI, YUESHENG NING, LEI WANG, JIE ZHOU
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Publication number: 20150133568Abstract: The present invention relates to a method for preparing graphene from a biomass-derived carbonaceous mesophase, which includes: soaking a base substance into an ethanol solution of a biomass-derived carbonaceous mesophase; after a certain period of time, taking out and drying the base substance, a layer of biomass-derived carbonaceous mesophase film being attached to the surface of the base substance; subjecting the base substance to a heat treatment under the protection of a hydrogen atmosphere, then a stacked graphene film was formed on the surface of the base substance; and further subjecting the base substance to ultrasonic dispersion in an alcohol solvent to separate the graphene film and the base substance, then a graphene alcosol was formed. The preparation process of the present invention is easy to implement. The raw material biomass-derived carbonaceous mesophase has abundant sources and is low in cost. The preparation process has low energy consumption, and is applicable to mass production.Type: ApplicationFiled: November 12, 2013Publication date: May 14, 2015Applicants: Shanghai Switchdiy Digital Technology Co., Ltd., Shanghai Jiao Tong UniversityInventors: BINYUAN ZHAO, YUXIANG CHEN, YIJIAN LAI, YUESHENG NING, LEI WANG, JIE ZHOU, TONGXIANG FAN
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Publication number: 20150128848Abstract: A method of preparing nanostructured single crystal silver, comprising placing a high-conductive molded porous active carbon containing chloride ions, which has been reductively treated, into a silver-containing precursor solution. After several hours at room temperature, the nanostructured single crystal silver grows on the surface of the active carbon. The silver-containing precursors and appropriate amount of chlorine provide a crystal nucleus and a slow stable crystal growth environment which are required for single crystal silver growth, and said nanostructured silver single crystals could be obtained with various morphologies by controlling the concentration of the silver-containing precursor solution and the growth time.Type: ApplicationFiled: November 12, 2013Publication date: May 14, 2015Applicants: Shanghai Switchdiy Digital Technology Co., Ltd., Shanghai Jiao Tong UniversityInventors: BINYUAN ZHAO, HONG ZHAO, FEI WANG, YIJIAN LAI, YUESHENG NING, LEI WANG, JIE ZHOU
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Publication number: 20150083974Abstract: The present invention relates to a new method for preparing a silver-based electrical contact material, comprising following steps of: (a) providing a carbonaceous mesophase solution; (b) adding a silver source into the carbonaceous mesophase solution and stirring to obtain a compound; (c) removing a solvent from the compound to obtain a solid; (d) performing a heat treatment on the solid, and obtaining a silver-based electrical contact material. The silver source is silver powder prepared by means of a chemical method. By means of the method, a uniform carbonaceous coating on silver is implemented, the silver is uniformly distributed in a nanometer scale, and a diamond is generated in situ of a material after being sintered. The silver-based electrical contact material processed by means of this method shows an excellent mechanical wear resistance and electrical property.Type: ApplicationFiled: March 29, 2013Publication date: March 26, 2015Applicant: Schneider Electric Industries SASInventors: Nan Liu, Binyuan Zhao, Yijian Lai