Patents by Inventor Zhongkai WANG
Zhongkai WANG 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: 11987868Abstract: A method for preparing a rare earth anisotropic bonded magnetic powder, comprises the following steps: (1) preparing raw powder with RTBH as the main component, wherein, R is Nd or Pr/Nd, and T is a transition metal containing Fe; (2) adding La hydride or Ce hydride and copper powder to the raw powder to form a mixture; (3) subjecting the mixture to atmosphere diffusion heat treatment to give the rare earth anisotropic bonded magnetic powder.Type: GrantFiled: November 5, 2020Date of Patent: May 21, 2024Assignees: GRIREM ADVANCED MATERIALS CO., LTD., GRIREM HI-TECH CO., LTD.Inventors: Yang Luo, Zilong Wang, Yuanfei Yang, Zhou Hu, Dunbo Yu, Jiajun Xie, Yifan Liao, Zhongkai Wang
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Patent number: 11981983Abstract: The invention discloses a composite rare earth anisotropic bonded magnet and a preparation method thereof. The composite rare earth anisotropic bonded magnet comprises a Nd—Fe—B magnetic powder, a Sm—Fe—N magnetic powder, a binder and an inorganic nano-dispersant. The preparation method comprises steps of preparing a Nd—Fe—B magnetic powder by a HDDR method, preparing a Sm—Fe—N magnetic powder by a powder metallurgy method, mixing the Nd—Fe—B magnetic powder, the Sm—Fe—N magnetic powder, the binder and the inorganic nano-dispersant at a specific ratio to finally obtain the composite rare earth anisotropic bonded magnet. The invention, by adding an inorganic nano-dispersant, enables the full dispersion of the fine Sm—Fe—N powder during the mixing process of the binder, the Nd—Fe—B magnetic powder and the Sm—Fe—N powder, and thus makes the fine Sm—Fe—N powder and the binder evenly coated on the surface of the anisotropic Nd—Fe—B magnetic powder.Type: GrantFiled: November 5, 2020Date of Patent: May 14, 2024Assignees: GRIREM ADVANCED MATERIALS CO., LTD., GRIREM HI-TECH CO., LTD.Inventors: Yang Luo, Zhongkai Wang, Yuanfei Yang, Zilong Wang, Dunbo Yu, Yifan Liao, Jiajun Xie, Zhou Hu
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Patent number: 11802326Abstract: An anisotropic bonded magnet and a preparation method thereof are provided. By stacking magnets having different magnetic properties and/or densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in pressing densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method solves the problem of “low in the middle and high at two ends” caused by the phenomenon of non-uniform magnetic field orientation and density along a height direction during orientation and densification.Type: GrantFiled: May 26, 2021Date of Patent: October 31, 2023Assignees: GRIREM HI-TECH CO., LTD., GRIREM ADVANCED MATERIALS CO., LTD., Grirem (Rongcheng) Co., Ltd.Inventors: Yang Luo, Yuanfei Yang, Zilong Wang, Dunbo Yu, Hongbin Zhang, Jiajun Xie, Zhou Hu, Zhongkai Wang
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Publication number: 20230203308Abstract: A preparation method of a branched polyamide copolymer with ultra-high toughness is disclosed. The preparation method includes: (1) dissolving a linear dibasic acid in a solvent A to obtain a linear dibasic acid solution, dissolving a diamine B in a solvent B to obtain a diamine solution B, and dissolving a diamine C in a solvent C to obtain a diamine solution C; (2) adding the diamine solution B to the linear dibasic acid solution to obtain an amide salt solution B; and adding the diamine solution C to the linear dibasic acid solution, and collecting a precipitate to obtain an amide salt C; and (3) mixing the amide salt solution B with the amide salt C, adding a catalyst, and conducting melt polycondensation. The prepared branched copolymer has excellent mechanical performance and is suitable for melt blending toughening, melt extrusion spinning, blow-extruded films, hot melt adhesives, and other fields.Type: ApplicationFiled: March 3, 2023Publication date: June 29, 2023Applicant: ANHUI AGRICULTURAL UNIVERSITYInventors: Zhongkai WANG, Wei LIU, Chuqing MA, Cheng LIU, Zhong WANG, Yaqiong ZHANG
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Patent number: 11505852Abstract: The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05?x?0.4, 7?a?13, 0?b?3, 5?c?20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.Type: GrantFiled: February 14, 2020Date of Patent: November 22, 2022Assignee: GRIREM ADVANCED MATERIALS CO., LTD.Inventors: Yang Luo, Xiao Lin, Guiyong Wu, Jiajun Xie, Zilong Wang, Wenlong Yan, Zhongkai Wang, Dunbo Yu
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Publication number: 20220363828Abstract: A preparation method of a reprocessable thermosetting polyesteramide (PEA) includes: (1) mixing 30 to 200 parts by weight of a liquid dicarboxylic acid and 15 to 95 parts by weight of a ?-hydroxyl-containing diamine compound, and heating for dissolution to obtain a reaction solution; (2) adding 0.05 to 0.5 parts by weight of a catalyst to the reaction solution, and heating under a nitrogen atmosphere to allow a reaction at 65° C. to 100° C. for 1 h to 6 h; (3) heating a reaction system obtained in step (2) to allow a reaction at 100° C. to 180° C. for 3 h to 18 h; (4) heating a reaction system obtained in step (3) to allow a reaction at 180° C. to 240° C. for 0.5 h to 4 h; and (5) cooling a reaction system obtained in step (4) to 100° C. to 180° C. A PEA prepared by the above preparation method is further provided.Type: ApplicationFiled: July 14, 2022Publication date: November 17, 2022Applicant: ANHUI AGRICULTURAL UNIVERSITYInventors: Zhongkai WANG, Yongliang DING, Cheng LIU
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Publication number: 20220210298Abstract: The present disclosure relates to the field of optical technologies and provides a camera module and an endoscope. The camera module includes: a connecting base, including a first connecting member and a first circuit board; wherein the first circuit board is installed in the first connecting member; and a camera, including a housing, a second circuit board, a light source assembly, and a lens assembly; wherein the second circuit board, the light source assembly, and the lens assembly are respectively installed in the housing; the housing is removably connected to the first connecting member; the first circuit board and the second circuit board are electrically connected to each other.Type: ApplicationFiled: June 25, 2021Publication date: June 30, 2022Inventors: Jiangfan YAN, Juhao CHEN, Zhongkai WANG, Hongquan GUAN, Haijuan ZOU, Xiang ZHENG
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Publication number: 20210375514Abstract: An anisotropic bonded magnet and a preparation method thereof are provided. By stacking magnets having different magnetic properties and/or densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in pressing densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method solves the problem of “low in the middle and high at two ends” caused by the phenomenon of non-uniform magnetic field orientation and density along a height direction during orientation and densification.Type: ApplicationFiled: May 26, 2021Publication date: December 2, 2021Inventors: Yang LUO, Yuanfei YANG, Zilong WANG, Dunbo YU, Hongbin ZHANG, Jiajun XIE, Zhou HU, Zhongkai WANG
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Publication number: 20210130939Abstract: The invention discloses an anisotropic bonded magnetic powder and a preparation method thereof. The anisotropic bonded magnetic powder has a general formula of R1R2TB, wherein R1 is a rare earth element containing Nd or PrNd, R2 is one or two of La and Ce, T is a transitional element, and B is boron. The preparation method includes the steps of smelting the master alloy to prepare ingot(s), preparing a rare earth hydride of formula R1TBHX, preparing a hydride diffusion source of formula R1R2THX, mixing, heat treating, and high-vacuum dehydrogenating, to obtain the anisotropic bonded magnetic powder. The invention uses La and Ce hydrides as the diffusion source, can save cost, remove hydrogen from the diffusion source at a lower dehydrogenation temperature, avoid crystal grain growth at a high temperature, and ensure the quality of the product.Type: ApplicationFiled: November 5, 2020Publication date: May 6, 2021Inventors: Yang Luo, Zhongkai Wang, Yuanfei Yang, Zilong Wang, Dunbo Yu, Yifan Liao, Jiajun Xie, Zhou Hu
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Publication number: 20210134499Abstract: The invention discloses a composite rare earth anisotropic bonded magnet and a preparation method thereof. The composite rare earth anisotropic bonded magnet comprises a Nd—Fe—B magnetic powder, a Sm—Fe—N magnetic powder, a binder and an inorganic nano-dispersant. The preparation method comprises steps of preparing a Nd—Fe—B magnetic powder by a HDDR method, preparing a Sm—Fe—N magnetic powder by a powder metallurgy method, mixing the Nd—Fe—B magnetic powder, the Sm—Fe—N magnetic powder, the binder and the inorganic nano-dispersant at a specific ratio to finally obtain the composite rare earth anisotropic bonded magnet. The invention, by adding an inorganic nano-dispersant, enables the full dispersion of the fine Sm—Fe—N powder during the mixing process of the binder, the Nd—Fe—B magnetic powder and the Sm—Fe—N powder, and thus makes the fine Sm—Fe—N powder and the binder evenly coated on the surface of the anisotropic Nd—Fe—B magnetic powder.Type: ApplicationFiled: November 5, 2020Publication date: May 6, 2021Inventors: Yang Luo, Zhongkai Wang, Yuanfei Yang, Zilong Wang, Dunbo Yu, Yifan Liao, Jiajun Xie, Zhou Hu
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Publication number: 20210129217Abstract: A method for preparing a rare earth anisotropic bonded magnetic powder, comprises the following steps: (1) preparing raw powder with RTBH as the main component, wherein, R is Nd or Pr/Nd, and T is a transition metal containing Fe; (2) adding La/Ce hydride and copper powder to the raw powder to form a mixture; (3) subjecting the mixture to atmosphere diffusion heat treatment to give the rare earth anisotropic bonded magnetic powder. The invention selects high-abundance rare earth elements La, Ce to replace Dy, Tb, Nd, Pr and other medium and heavy rare earth elements, which can achieve the same coercivity improvement effect while also significantly reducing the cost, thereby achieving efficient application of low-cost and high-abundance rare earths.Type: ApplicationFiled: November 5, 2020Publication date: May 6, 2021Inventors: Yang LUO, Zilong WANG, Yuanfei Yang, Zhou HU, Dunbo Yu, Jiajun XIE, Yifan LIAO, Zhongkai WANG
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Publication number: 20200263280Abstract: The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05?x?0.4, 7?a?13, 0?b?3, 5?c?20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.Type: ApplicationFiled: February 14, 2020Publication date: August 20, 2020Inventors: Yang LUO, Xiao LIN, Guiyong WU, Jiajun XIE, Zilong WANG, Wenlong YAN, Zhongkai WANG, Dunbo YU
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Patent number: 10287236Abstract: A method i for forming an epoxidized polymer is provided. The method may include mixing an epoxidized plant oil with a synthetic epoxy resin and crosslinking the epoxidized plant oil and the synthetic epoxy resin using a curing agent. The epoxidized plant oil may be formed via: converting plant oil triglycerides to fatty amide alcohols via aminolysis using primary or secondary amines, converting the fatty amide alcohols to epoxidized fatty amide alcohols, and reacting the epoxidized fatty amide alcohols with vinyl monomers to obtain epoxidized plant oil monomers.Type: GrantFiled: April 17, 2017Date of Patent: May 14, 2019Assignee: University of South CarolinaInventors: Chuanbing Tang, Zhongkai Wang, Liang Yuan
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Patent number: 10215942Abstract: The present disclosure discloses a high-temperature resistant and small-diameter optical cable and a preparation method thereof. The high-temperature resistant and small-diameter optical cable is prepared by using acrylate as a coating material, using PHB/PET liquid crystal copolyester as an outer protective layer material and using an extrusion process. Compared to traditional optical cables, the novel optical cable has advantages in small diameter, low loss attenuation, good microbending property, excellent mechanical property, long one-time finished length (10 km˜26 km), long storage time, simple preparation process and wide operating temperature range.Type: GrantFiled: December 20, 2017Date of Patent: February 26, 2019Assignee: HENGTONG OPTIC-ELECTRIC CO., LTD.Inventors: Peidong Liu, Peng Cao, Zengqiang Zhang, Jicheng Yin, Chuanwu Xuan, Junxiong Wu, Xinhua Shen, Qiang Li, Hongzhou Pan, Di Wu, Zhongkai Wang, Shan Xu, Lihua Sun
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Publication number: 20180246288Abstract: The present disclosure relates to a high-temperature resistant and small-diameter optical cable and a preparation method thereof. The high-temperature resistant and small-diameter optical cable is prepared by using acrylate as a coating material, using PHB/PET liquid crystal copolyester as an outer protective layer material and using an extrusion process. Compared to traditional optical cables, the high-temperature resistant and small-diameter optical cable is small in diameter, low in loss, good in microbending property, excellent in mechanical property, long in one-time finished length (10 kilometers (km)˜26 km), long in storage time, simple in preparation process, and wide in operating temperature range.Type: ApplicationFiled: November 2, 2016Publication date: August 30, 2018Applicant: Hengtong Optic-electric Co., Ltd.Inventors: Peidong LIU, Peng CAO, Zengqiang ZHANG, Jicheng YIN, Chuanwu XUAN, Junxiong WU, Xinhua SHEN, Qiang LI, Hongzhou PAN, Di WU, Zhongkai WANG, Shan XU, Lihua SUN
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Publication number: 20180129003Abstract: The present disclosure discloses a high-temperature resistant and small-diameter optical cable and a preparation method thereof. The high-temperature resistant and small-diameter optical cable is prepared by using acrylate as a coating material, using PHB/PET liquid crystal copolyester as an outer protective layer material and using an extrusion process. Compared to traditional optical cables, the novel optical cable has advantages in small diameter, low loss attenuation, good microbending property, excellent mechanical property, long one-time finished length (10 km˜26 km), long storage time, simple preparation process and wide operating temperature range.Type: ApplicationFiled: December 20, 2017Publication date: May 10, 2018Applicant: Hengtong Optic-electric Co., Ltd.Inventors: Peidong LIU, Peng CAO, Zengqiang ZHANG, Jicheng YIN, Chuanwu XUAN, Junxiong WU, Xinhua SHEN, Qiang LI, Hongzhou PAN, Di WU, Zhongkai WANG, Shan XU, Lihua SUN
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Publication number: 20170298007Abstract: A method i for forming an epoxidized polymer is provided. The method may include mixing an epoxidized plant oil with a synthetic epoxy resin and crosslinking the epoxidized plant oil and the synthetic epoxy resin using a curing agent. The epoxidized plant oil may be formed via: converting plant oil triglycerides to fatty amide alcohols via aminolysis using primary or secondary amines, converting the fatty amide alcohols to epoxidized fatty amide alcohols, and reacting the epoxidized fatty amide alcohols with vinyl monomers to obtain epoxidized plant oil monomers.Type: ApplicationFiled: April 17, 2017Publication date: October 19, 2017Inventors: Chuanbing Tang, Zhongkai Wang, Liang Yuan
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Patent number: 9219599Abstract: A clock and data recovery (CDR) circuit employing zero-crossing linearizing (ZCL) technique. The circuit including a voltage controlled oscillator (VCO), an inject-locked divider (ILD), a variable delay unit, a linearized loop, a bang-bang loop, and a loop filter (LP). The differential clock generated by VCO passes through ILD for frequency dividing and variable delay unit to generate 8-phase clocks. Then using these clocks, the PDs over-sample the input data, followed by synchronization and logic operation to control the CPs output current pulses. These currents filtered by LP control the VCO to finish the loop. The circuit recovers 4 channel data and corresponding clocks of the input with low power broken-down and preferable jitter performance and locking property.Type: GrantFiled: December 4, 2014Date of Patent: December 22, 2015Assignee: FUDAN UNIVERSITYInventors: Zhongkai Wang, Rui Bai, Patrick Yin Chiang
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Publication number: 20150180644Abstract: A clock and data recovery (CDR) circuit employing zero-crossing linearizing (ZCL) technique. The circuit including a voltage controlled oscillator (VCO), an inject-locked divider (ILD), a variable delay unit, a linearized loop, a bang-bang loop, and a loop filter (LP). The differential clock generated by VCO passes through ILD for frequency dividing and variable delay unit to generate 8-phase clocks. Then using these clocks, the PDs over-sample the input data, followed by synchronization and logic operation to control the CPs output current pulses. These currents filtered by LP control the VCO to finish the loop. The circuit recovers 4 channel data and corresponding clocks of the input with low power broken-down and preferable jitter performance and locking property.Type: ApplicationFiled: December 4, 2014Publication date: June 25, 2015Inventors: Zhongkai WANG, Rui BAI, Patrick Yin CHIANG