Patents by Inventor Zigui Lu
Zigui Lu 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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Publication number: 20240093376Abstract: A method of forming a protective coating on an interconnect for an electrochemical device stack includes providing a powder on the interconnect and laser sintering the powder.Type: ApplicationFiled: September 19, 2023Publication date: March 21, 2024Inventors: Adam BYRD, Zigui LU, Guoliang XIAO, Tad ARMSTRONG, Harald HERCHEN, Travis SCHMAUSS, Keji PAN
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Publication number: 20220231308Abstract: Systems, devices, and methods that utilize a method of coating an interconnect for a SOEC or SOFC, the method including wet spraying a coating precursor powder onto an interconnect, and sintering the interconnect in an oxidizing ambient to form the coating.Type: ApplicationFiled: January 19, 2022Publication date: July 21, 2022Inventors: Tad Armstrong, Sanchit Khurana, Zigui Lu
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Patent number: 11052353Abstract: A method is described of producing a catalyst-containing composite oxygen ion membrane and a catalyst-containing composite oxygen ion membrane in which a porous fuel oxidation layer and a dense separation layer and optionally, a porous surface exchange layer are formed on a porous support from mixtures of (Ln1?xAx)wCr1?yByO3?? and a doped zirconia. Adding certain catalyst metals into the fuel oxidation layer not only enhances the initial oxygen flux, but also reduces the degradation rate of the oxygen flux over long-term operation. One of the possible reasons for the improved flux and stability is that the addition of the catalyst metal reduces the chemical reaction between the (Ln1?xAx)wCr1?yByO3?? and the zirconia phases during membrane fabrication and operation, as indicated by the X-ray diffraction results.Type: GrantFiled: March 2, 2017Date of Patent: July 6, 2021Assignee: Praxair Technology, Inc.Inventors: Zigui Lu, Yunxiang Lu, Gervase Maxwell Christie, Jonathan A. Lane, Pawel J. Plonczak, Joseph M. Corpus
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Patent number: 10520265Abstract: A method for creating a coating onto an inner diameter of conduit, whereby an injection nozzle is moved in a forward direction until its tip is aligned with the end of the conduit. Slurry is pumped from a reservoir into the injection nozzle and then is discharged through the tip of the injection nozzle. The slurry flows, distributes and spreads onto the surface of the conduit. The conduit is rotated and the nozzle is retracted as slurry continues to discharge from the nozzle to coat the remainder of the conduit.Type: GrantFiled: October 15, 2015Date of Patent: December 31, 2019Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Sang Muk Kwark, Zigui Lu, David P. Potempa, Maulik R. Shelat
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Patent number: 10221970Abstract: A porous metallic coating is provided. The coating is characterized by a combination of optimized properties that improve coating performance, as measured by heat transfer efficiency. The porous coating has optimal ranges for properties such as porosity, particle size and thickness, and has particular applicability in boiling heat transfer applications as part of an air separations unit. The porous coatings are derived from slurry-based formulations that include a mixture of metallic particles, a binder and a solvent.Type: GrantFiled: June 21, 2018Date of Patent: March 5, 2019Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Zigui Lu, Sang Muk Kwark, Joseph M. Corpus, Jonathan A. Lane, David P. Potempa, Maulik R. Shelat
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Publication number: 20190022596Abstract: A method is described of producing a catalyst-containing composite oxygen ion membrane and a catalyst-containing composite oxygen ion membrane in which a porous fuel oxidation layer and a dense separation layer and optionally, a porous surface exchange layer are formed on a porous support from mixtures of (Ln1?xAx)wCr1?yByO3?? and a doped zirconia. Adding certain catalyst metals into the fuel oxidation layer not only enhances the initial oxygen flux, but also reduces the degradation rate of the oxygen flux over long-term operation. One of the possible reasons for the improved flux and stability is that the addition of the catalyst metal reduces the chemical reaction between the (Ln1?xAx)wCr1?yByO3?? and the zirconia phases during membrane fabrication and operation, as indicated by the X-ray diffraction results.Type: ApplicationFiled: March 2, 2017Publication date: January 24, 2019Inventors: Zigui Lu, Yunxiagn Lu, Gervase Maxwell Christie, Jonathan A. Lane, Pawel J. Plonczak, Joseph M. Corpus
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Publication number: 20180299035Abstract: A porous metallic coating is provided. The coating is characterized by a combination of optimized properties that improve coating performance, as measured by heat transfer efficiency. The porous coating has optimal ranges for properties such as porosity, particle size and thickness, and has particular applicability in boiling heat transfer applications as part of an air separations unit. The porous coatings are derived from slurry-based formulations that include a mixture of metallic particles, a binder and a solvent.Type: ApplicationFiled: June 21, 2018Publication date: October 18, 2018Inventors: Zigui Lu, Sang Muk Kwark, Joseph M. Corpus, Jonathan A. Lane, David P. Potempa, Maulik R. Shelat
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Patent number: 10047880Abstract: A porous metallic coating is provided. The coating is characterized by a combination of optimized properties that improve coating performance, as measured by heat transfer efficiency. The porous coating has optimal ranges for properties such as porosity, particle size and thickness, and has particular applicability in boiling heat transfer applications as part of an air separations unit. The porous coatings are derived from slurry-based formulations that include a mixture of metallic particles, a binder and a solvent.Type: GrantFiled: October 15, 2015Date of Patent: August 14, 2018Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Zigui Lu, Sang Muk Kwark, Joseph M. Corpus, Jonathan A. Lane, David P. Potempa, Maulik R. Shelat
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Patent number: 9789445Abstract: A composite oxygen ion transport membrane having a dense layer, a porous support layer, an optional intermediate porous layer located between the porous support layer and the dense layer and an optional surface exchange layer, overlying the dense layer. The dense layer has electronic and ionic phases. The ionic phase is composed of scandia doped, yttrium or cerium stabilized zirconia. The electronic phase is composed of a metallic oxide containing lanthanum, strontium, chromium, iron and cobalt. The porous support layer is composed of zirconia partially stabilized with yttrium, scandium, aluminum or cerium or mixtures thereof. The intermediate porous layer, if used, contains the same ionic and electronic phases as the dense layer. The surface exchange layer is formed of an electronic phase of a metallic oxide of lanthanum and strontium that also contains chromium, iron and cobalt and an ionic phase of scandia doped zirconia stabilized with yttrium or cerium.Type: GrantFiled: September 14, 2015Date of Patent: October 17, 2017Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Jonathan A. Lane, Zigui Lu, Pawel J. Plonczak
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Publication number: 20170108296Abstract: A method for creating a coating onto a conduit is provided. The method includes rotating the conduit while injecting a controlled amount of slurry onto the surface of an inner diameter of the conduit through a nozzle that is retracted from out of the conduit at a controlled speed. The method offers improved reproducibility and repeatability of coating properties in comparison to conventional coating methods.Type: ApplicationFiled: October 15, 2015Publication date: April 20, 2017Inventors: SANG MUK KWARK, ZIGUI LU, DAVID P. POTEMPA, MAULIK R. SHELAT
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Publication number: 20170108148Abstract: A porous metallic coating is provided. The coating is characterized by a combination of optimized properties that improve coating performance, as measured by heat transfer efficiency. The porous coating has optimal ranges for properties such as porosity, particle size and thickness, and has particular applicability in boiling heat transfer applications as part of an air separations unit. The porous coatings are derived from slurry-based formulations that include a mixture of metallic particles, a binder and a solvent.Type: ApplicationFiled: October 15, 2015Publication date: April 20, 2017Inventors: ZIGUI LU, SANG MUK KWARK, JOSEPH M. CORPUS, JONATHAN A. LANE, DAVID P. POTEMPA, MAULIK R. SHELAT
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Patent number: 9486735Abstract: A method is described of producing a composite oxygen ion membrane and a composite oxygen ion membrane in which a porous fuel oxidation layer and a dense separation layer and optionally, a porous surface exchange layer are formed on a porous support from mixtures of (Ln1-xAx)wCr1-yByO3-? and a doped zirconia. Preferred materials are (La0.8Sr0.2)0.95Cr0.7Fe0.3O3-? for the porous fuel oxidation layer, (La0.8Sr0.2)0.95Cr0.5Fe0.5O3-? for the dense separation layer, and (La0.8Sr0.2)0.95Cr0.3Fe0.7O3-? for the porous surface exchange layer. Firing the said fuel activation and separation layers in nitrogen atmosphere unexpectedly allows the separation layer to sinter into a fully densified mass.Type: GrantFiled: September 16, 2015Date of Patent: November 8, 2016Assignee: PRAXAIR TECHNOLOGY, INC.Inventors: Zigui Lu, Pawel J. Plonczak, Jonathan A. Lane
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Publication number: 20160096150Abstract: A composite oxygen ion transport membrane having a dense layer, a porous support layer, an optional intermediate porous layer located between the porous support layer and the dense layer and an optional surface exchange layer, overlying the dense layer. The dense layer has electronic and ionic phases. The ionic phase is composed of scandia doped, yttrium or cerium stabilized zirconia. The electronic phase is composed of a metallic oxide containing lanthanum, strontium, chromium, iron and cobalt. The porous support layer is composed of zirconia partially stabilized with yttrium, scandium, aluminum or cerium or mixtures thereof. The intermediate porous layer, if used, contains the same ionic and electronic phases as the dense layer. The surface exchange layer is formed of an electronic phase of a metallic oxide of lanthanum and strontium that also contains chromium, iron and cobalt and an ionic phase of scandia doped zirconia stabilized with yttrium or cerium.Type: ApplicationFiled: September 14, 2015Publication date: April 7, 2016Inventors: Jonathan A. Lane, Zigui Lu, Pawel J. Plonczak
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Publication number: 20160001221Abstract: A method is described of producing a composite oxygen ion membrane and a composite oxygen ion membrane in which a porous fuel oxidation layer and a dense separation layer and optionally, a porous surface exchange layer are formed on a porous support from mixtures of (Ln1-xAx)wCr1-yByO3-? and a doped zirconia. Preferred materials are (La0.8Sr0.2)0.95Cr0.7Fe0.3O3-? for the porous fuel oxidation layer, (La0.8Sr0.2)0.95Cr0.5Fe0.5O3-? for the dense separation layer, and (La0.8Sr0.2)0.95Cr0.3Fe0.7O3-? for the porous surface exchange layer. Firing the said fuel activation and separation layers in nitrogen atmosphere unexpectedly allows the separation layer to sinter into a fully densified mass.Type: ApplicationFiled: September 16, 2015Publication date: January 7, 2016Inventors: Zigui Lu, Pawel J. Plonczak, Jonathan A. Lane