Patents by Inventor Sang-Whan Park
Sang-Whan Park 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: 11634364Abstract: The present disclosure provides a boron carbide composite material having a novel composition with excellent mechanical properties, and a production method therefor. The boron carbide composite material has high fracture toughness and may be applied as a lightweight bulletproof ceramic material. The boron carbide composite material is a boron carbide/silicon carbide/titanium boride/graphite (B4C—SiC—TiB2—C) composite material. The composite material may overcome a technical limitation on increasing the fracture toughness of the boron carbide composite material, and may be produced as a high-density boron carbide composite material using a reactive hot-pressing sintering process at a relatively low temperature.Type: GrantFiled: February 24, 2021Date of Patent: April 25, 2023Assignee: Korea Institute of Science and TechnoloyInventors: Sang Whan Park, Mi Rae Youm, Sung Il Yun, Jun Hyung Park
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Publication number: 20210269364Abstract: The present disclosure provides a boron carbide composite material having a novel composition with excellent mechanical properties, and a production method therefor. The boron carbide composite material has high fracture toughness and may be applied as a lightweight bulletproof ceramic material. The boron carbide composite material is a boron carbide/silicon carbide/titanium boride/graphite (B4C—SiC—TiB2—C) composite material. The composite material may overcome a technical limitation on increasing the fracture toughness of the boron carbide composite material, and may be produced as a high-density boron carbide composite material using a reactive hot-pressing sintering process at a relatively low temperature.Type: ApplicationFiled: February 24, 2021Publication date: September 2, 2021Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sang Whan PARK, Mi Rae YOUM, SUNG IL YUN, Jun Hyung PARK
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Publication number: 20210163301Abstract: The present disclosure provide a method for producing large granular high-purity ?-phase silicon carbide powders using a silicon dioxide/carbon composite, the method including: producing a gel in which the carbonaceous compound is dispersed in a silicon dioxide network structure through a sol-gel process using starting materials including liquid phase silicon containing compounds and liquid phase carbonaceous compounds; subjecting the gel to first heat treatment to thermally decompose the carbon carbonaceous compound, thereby producing a silicon dioxide/carbon composite including nano-sized carbon particles; and subjecting the silicon dioxide/carbon composite to second heat treatment at a higher temperature than that of the first heat treatment to obtain large granular high-purity ?-phase silicon carbide powders.Type: ApplicationFiled: November 25, 2020Publication date: June 3, 2021Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sang Whan PARK, Mi Rae YOUM, SUNG IL YUN
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Patent number: 10730753Abstract: The present invention relates to an eco-friendly method for preparing a porous silicon carbide structure, which is capable of preparing a porous silicon carbide structure having meso- or macro-sized pores without using a harmful phenolic resin as a carbon source.Type: GrantFiled: October 26, 2018Date of Patent: August 4, 2020Assignee: Korea Institute of Science and TechnologyInventors: Sang Whan Park, Mi Rae Youm, Sung Il Yun
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Patent number: 10688478Abstract: The present invention relates to a method for preparing a metal catalyst (Ni, Co, etc.)-supported porous silicon carbide structure having meso- to macro-sized pores, high porosity and superior mechanical properties. Unlike the existing method wherein a porous silicon carbide structure is prepared and then the metal catalyst is infiltrated therein, the preparation of the porous silicon carbide structure and the supporting of the metal catalyst occur at the same time by the mixing metal catalyst material and starting materials. As a result, the metal catalyst is distributed uniformly in the porous silicon carbide structure and it is possible to locate a desired amount of the metal catalyst inside the porous silicon carbide structure.Type: GrantFiled: October 24, 2018Date of Patent: June 23, 2020Assignee: Korea Institute of Science and TechnologyInventors: Sang Whan Park, Mi Rae Youm, Sung Il Yun
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Publication number: 20190160454Abstract: The present invention relates to a method for preparing a metal catalyst (Ni, Co, etc.)-supported porous silicon carbide structure having meso- to macro-sized pores, high porosity and superior mechanical properties. Unlike the existing method wherein a porous silicon carbide structure is prepared and then the metal catalyst is infiltrated therein, the preparation of the porous silicon carbide structure and the supporting of the metal catalyst occur at the same time by the mixing metal catalyst material and starting materials. As a result, the metal catalyst is distributed uniformly in the porous silicon carbide structure and it is possible to locate a desired amount of the metal catalyst inside the porous silicon carbide structure.Type: ApplicationFiled: October 24, 2018Publication date: May 30, 2019Applicant: Korea Institute of Science and TechnologyInventors: Sang Whan PARK, Mi Rae YOUM, Sung Il YUN
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Publication number: 20190144287Abstract: The present invention relates to an eco-friendly method for preparing a porous silicon carbide structure, which is capable of preparing a porous silicon carbide structure having meso- or macro-sized pores without using a harmful phenolic resin as a carbon source.Type: ApplicationFiled: October 26, 2018Publication date: May 16, 2019Applicant: Korea Institute of Science and TechnologyInventors: Sang Whan PARK, Mi Rae YOUM, Sung Il YUN
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Patent number: 10106423Abstract: The present invention relates to a method for preparing an ultrahigh-purity silicon carbide powder, more particularly to a method for preparing an ultrahigh-purity silicon carbide granular powder by preparing a gel wherein a silicon compound and a carbon compound are uniformly dispersed via a sol-gel process using a liquid state silicon compound and a solid or liquid state carbon compound of varying purities as raw materials, preparing a silicon dioxide-carbon (SiO2—C) composite by pyrolyzing the prepared gel, preparing a silicon carbide-silicon dioxide-carbon (SiC—SiO2—C) composite powder via two-step carbothermal reduction of the prepared silicon dioxide-carbon composite, adding a silicon metal and then conducting carbonization and carbothermal reduction at the same time by heat treating, thereby growing the synthesized silicon carbide particle with an increased yield of the silicon carbide.Type: GrantFiled: March 17, 2016Date of Patent: October 23, 2018Assignee: Korea Institute of Science and TechnologyInventors: Sang Whan Park, Mi Rae Youm, Sung Il Youn, Gyoung Sun Cho
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Patent number: 9994454Abstract: The present disclosure relates to porous silicon dioxide-carbon composites and a method for preparing high-purity ?-phase silicon carbide granular powders using the same.Type: GrantFiled: March 21, 2016Date of Patent: June 12, 2018Assignee: Korea Institute of Science and TechnologyInventors: Sang Whan Park, Mi Rae Youm, Sung Il Youn, Gyoung Sun Cho
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Patent number: 9911517Abstract: Disclosed is a carbon felt impregnated with inorganic particles. The impregnated carbon felt can be used together with sulfur in a cathode of a sodium-sulfur (Na—S) battery. Also disclosed is a method for producing the impregnated carbon felt. According to exemplary embodiments, the problem of the prior art can be solved in which inorganic particles such as alumina particles are not directly adhered to carbon felts, thus necessitating complicated processes. In addition, a slurry including an inorganic binder and alumina particles can be used to directly coat the alumina particles on the surface of a carbon felt, making the production procedure very simple.Type: GrantFiled: September 4, 2014Date of Patent: March 6, 2018Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Chang-Sam Kim, Sang Whan Park, Byung Won Cho, Kyoung Ran Lim
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Publication number: 20170081197Abstract: The present disclosure relates to porous silicon dioxide-carbon composites and a method for preparing high-purity ?-phase silicon carbide granular powders using the same.Type: ApplicationFiled: March 21, 2016Publication date: March 23, 2017Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sang Whan PARK, Mi Rae YOUM, Sung Il YOUN, Gyoung Sun CHO
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Publication number: 20170073233Abstract: The present invention relates to a method for preparing an ultrahigh-purity silicon carbide powder, more particularly to a method for preparing an ultrahigh-purity silicon carbide granular powder by preparing a gel wherein a silicon compound and a carbon compound are uniformly dispersed via a sol-gel process using a liquid state silicon compound and a solid or liquid state carbon compound of varying purities as raw materials, preparing a silicon dioxide-carbon (SiO2—C) composite by pyrolyzing the prepared gel, preparing a silicon carbide-silicon dioxide-carbon (SiC—SiO2—C) composite powder via two-step carbothermal reduction of the prepared silicon dioxide-carbon composite, adding a silicon metal and then conducting carbonization and carbothermal reduction at the same time by heat treating, thereby growing the synthesized silicon carbide particle with an increased yield of the silicon carbide.Type: ApplicationFiled: March 17, 2016Publication date: March 16, 2017Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sang Whan PARK, Mi Rae YOUM, Sung Il YOUN, Gyoung Sun CHO
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Patent number: 9487405Abstract: Disclosed herein is a method for manufacturing SiC powders with a high purity, and more particularly, a method for manufacturing SiC powders with a high purity by reating a solid phase carbon source as raw materials with gas phase silicon sources generated from a starting material composed of metallic silicon and silicon dioxide powders and, in which it is easy to control the size and crystalline phase of the SiC powders by changing the compositions of the gas phase silicon source to the solid phase carbon source mole ratio, and the temperature and time for the heat treatment.Type: GrantFiled: March 14, 2013Date of Patent: November 8, 2016Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sang Whan Park, Kyoung Sop Han, Sung Ho Yun, Jin Oh Yang, Gyoung Sun Cho, Mi Rae Youm, Yung Chul Jo
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Publication number: 20150255796Abstract: Disclosed is a carbon felt impregnated with inorganic particles. The impregnated carbon felt can be used together with sulfur in a cathode of a sodium-sulfur (Na—S) battery. Also disclosed is a method for producing the impregnated carbon felt. According to exemplary embodiments, the problem of the prior art can be solved in which inorganic particles such as alumina particles are not directly adhered to carbon felts, thus necessitating complicated processes. In addition, a slurry including an inorganic binder and alumina particles can be used to directly coat the alumina particles on the surface of a carbon felt, making the production procedure very simple.Type: ApplicationFiled: September 4, 2014Publication date: September 10, 2015Inventors: Chang-Sam KIM, Sang Whan PARK, Byung Won CHO, Kyoung Ran LIM
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Patent number: 8986598Abstract: Disclosed is an alumina-coated spinel-silicon carbide refractory composition with good resistance to coal slag penetration and a method for manufacturing the same. The refractory composition refractory composition comprising 3 to 10 parts by weight of fine alpha alumina powder with respect to the weight of the refractory mixture, wherein the mixture is prepared by mixing alumina-coated spinel aggregates and silicon carbide in a ratio of 10:90 to 40:60 wt %, a dispersant, and an alumina sol as a binder.Type: GrantFiled: November 12, 2012Date of Patent: March 24, 2015Assignee: Korea Institute of Science and TechnologyInventors: Chang Sam Kim, Sang Whan Park
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Patent number: 8974857Abstract: Disclosed is to a method for manufacturing a cobalt boride coating layer on the surface of iron-based metals by using a pack cementation process. In particular, the present invention relates to a method for manufacturing a cobalt boride coating layer by forming a composite coating layer on the surface of steels which is composed of an outmost layer having a composition of cobalt boride (Co2B) and an inner layer having a composition of iron-cobalt boride ((Fe,Co)2B). Since the cobalt boride coating layer is a compact coating layer having little defects such as pores, it can improve physical properties such as corrosion resistance, wear resistance and oxidation resistance of steels.Type: GrantFiled: November 13, 2012Date of Patent: March 10, 2015Assignee: Korea Institute of Science and TechnologyInventors: Jin Kook Yoon, Jung Man Doh, Sang Whan Park
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Patent number: 8877118Abstract: Disclosed are methods of producing Ni/YSZ porous anode bodies for solid oxide fuel cells. According to the methods, a small amount of a nickel compound or salt is used as a pore former. Upon heating in air, the nickel compound or salt is decomposed into nickel oxide and releases gases, resulting in volume shrinkage. Therefore, Ni/YSZ porous bodies having a uniform pore size and reduction products thereof can be produced in an economical manner.Type: GrantFiled: December 2, 2011Date of Patent: November 4, 2014Assignee: Korea Institute of Science and TechnologyInventors: Chang-Sam Kim, Kyoung Ran Han, Sang Whan Park, Sung Woon Jeon
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Patent number: 8815759Abstract: Disclosed is a cement-free high strength unshaped refractory in which barium aluminate and a dispersant are further added to a refractory which includes a refractory material containing Al2O3 and SiC and an alumina sol binder to largely improve handling strength of the unshaped refractory. The unshaped refractory according to the present invention is usefully applicable to lining which contacts slag in a blast furnace or a gasifier.Type: GrantFiled: November 12, 2012Date of Patent: August 26, 2014Assignee: Korea Institute of Science and TechnologyInventors: Kyoung Ran Han, Sang Whan Park, Chang Sam Kim
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Publication number: 20130260160Abstract: Disclosed is to a method for manufacturing a cobalt boride coating layer on the surface of iron-based metals by using a pack cementation process. In particular, the present invention relates to a method for manufacturing a cobalt boride coating layer by forming a composite coating layer on the surface of steels which is composed of an outmost layer having a composition of cobalt boride (Co2B) and an inner layer having a composition of iron-cobalt boride ((Fe,Co)2B). Since the cobalt boride coating layer is a compact coating layer having little defects such as pores, it can improve physical properties such as corrosion resistance, wear resistance and oxidation resistance of steels.Type: ApplicationFiled: November 13, 2012Publication date: October 3, 2013Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jin Kook YOON, Jung MAN, Sang Whan PARK
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Publication number: 20130260981Abstract: Disclosed is an alumina-coated spinel-silicon carbide refractory composition with good resistance to coal slag penetration and a method for manufacturing the same. The refractory composition refractory composition comprising 3 to 10 parts by weight of fine alpha alumina powder with respect to the weight of the refractory mixture, wherein the mixture is prepared by mixing alumina-coated spinel aggregates and silicon carbide in a ratio of 10:90 to 40:60 wt %, a dispersant, and an alumina sol as a binder.Type: ApplicationFiled: November 12, 2012Publication date: October 3, 2013Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Chang Sam KIM, Sang Whan PARK