公开(公告)号：US08845918B2

公开(公告)日：2014-09-30

申请号：US12883803

申请日：2010-09-16

Applicant: Kyung Tae Kim ,  Gook Hyun Ha ,  Dong Won Kim

Inventor： Kyung Tae Kim ,  Gook Hyun Ha ,  Dong Won Kim

IPC: H01B1/04 ,  H01B1/18 ,  H01L35/22 ,  H01L35/26 ,  H01L35/34 ,  C22C1/02

CPC classification number: H01B1/18 ,  B22F9/04 ,  B22F9/24 ,  B22F2998/10 ,  C22C12/00 ,  C22C26/00 ,  C22C47/14 ,  C22C49/12 ,  C22C49/14 ,  H01L35/22 ,  H01L35/26 ,  H01L35/34 ,  B22F3/105

Abstract: The thermoelectric material according to the present invention is characterized in that carbon nanotubes are dispersed in thermoelectric matrix powder by mechanically grinding, mixing, and treating by heating a mixed powder formed through a chemical reaction after mixing a first solution in which carbon nanotubes are dispersed and a second solution containing metallic salts. Further, a method for fabricating the thermoelectric material includes fabricating the first solution and the second solution, mixing the first solution and the second solution with each other to form a mixed solution, forming and growing a mixed powder in which carbon nanotubes and metals are mixed by a chemical reaction of the mixed solution, mechanically grinding and mixing the mixed powder, and heating the ground-and-mixed mixed powder to form the thermoelectric material. In addition, a composite can be made from the thermoelectric material by performing a spark plasma sintering process using the thermoelectric material, and has an improved thermoelectric efficiency due to the carbon nanotubes dispersed in the thermoelectric materials.

Abstract translation: 根据本发明的热电材料的特征在于，通过在将分散有碳纳米管的第一溶液与第一溶液分散后，通过加热通过化学反应形成的混合粉末进行机械研磨，混合和处理，将碳纳米管分散在热电基质粉末中 含有金属盐的第二溶液。 此外，制造热电材料的方法包括制造第一溶液和第二溶液，将第一溶液和第二溶液彼此混合以形成混合溶液，形成和生长其中混合有碳纳米管和金属的混合粉末 通过混合溶液的化学反应，机械研磨和混合混合粉末，并加热研磨和混合的混合粉末以形成热电材料。 此外，可以通过使用热电材料进行放电等离子体烧结工艺，从热电材料制成复合材料，并且由于碳纳米管分散在热电材料中而具有改善的热电效率。

公开(公告)号：US5882376A

公开(公告)日：1999-03-16

申请号：US910588

申请日：1997-07-25

Applicant: Byoung-Kee Kim ,  Gil-Geun Lee ,  Gook-Hyun Ha ,  Dong-Won Lee

Inventor： Byoung-Kee Kim ,  Gil-Geun Lee ,  Gook-Hyun Ha ,  Dong-Won Lee

IPC: B22F9/08 ,  B22F9/00 ,  B22F9/22 ,  C22C1/05 ,  B22F9/26

CPC classification number: C22C1/055 ,  B22F2998/00 ,  Y10S977/776

Abstract: A mechanochemical process for producing fine WC/Co composite powder which is so small in WC grain size and in mean free path, and contains such a uniform distribution of WC and Co that its hard metal is superior in strength, compressive strength, TRS and wear resistance and considerably free of impurities. The method comprises the steps of drying an ammonium metatungstate--Co(NO.sub.3).sub.2 solution in a spray dry manner to give initial powder of porous spheroids or in a common manner to give a cake of initial powder, removing the salts and humidity from the initial powder by a thermal treatment, mixing and milling the desalted initial powder with carbon black, and subjecting the mixed powder to reduction/carburization in a reactor.

Abstract translation: WC颗粒尺寸小，平均自由程度小的WC / Co复合粉末的机械化学方法，含有均匀的WC和Co分布，其硬度优良，抗压强度，TRS和磨损性 电阻和相当大的无杂质。 该方法包括以喷雾干燥方式干燥偏钨酸铵-Co（NO 3）2溶液以产生多孔球体的初始粉末或以常规方式得到初始粉末饼，从初始的粉末中除去盐和湿气 通过热处理粉末，用炭黑混合和研磨脱盐的初始粉末，并将混合粉末在反应器中进行还原/渗碳。

公开(公告)号：US06511551B2

公开(公告)日：2003-01-28

申请号：US09881764

申请日：2001-06-18

Applicant: Byoung-Kee Kim ,  Gook-Hyun Ha ,  Yong-Won Woo

Inventor： Byoung-Kee Kim ,  Gook-Hyun Ha ,  Yong-Won Woo

IPC: C23C860

CPC classification number: C22C1/053 ,  B22F2003/1032 ,  B22F2998/10 ,  B22F9/026 ,  B22F9/04

Abstract: The present invention relates to a method of adding a grain growth inhibitor of WC/Co cemented carbide, which comprises adding a water-soluble salt of V, Ta, or Cr component as a grain growth inhibitor, at the time of mixing water-soluble salts of W and Co during the initial production process of WC/Co cemented carbides. As a result, the present invention leads to the production of powder of homogeneous distribution of grain growth inhibitors, which in turn results in the enhancement of the mechanical properties thereof by effectively controlling the abnormal growth of WC during sintering in the production process of said cemented carbides.

公开(公告)号：US07115240B2

公开(公告)日：2006-10-03

申请号：US10407563

申请日：2003-04-04

Applicant: Byung Kee Kim ,  Gook Hyun Ha

Inventor： Byung Kee Kim ,  Gook Hyun Ha

IPC: C01B31/34 ,  C01G41/00

CPC classification number: C04B35/6267 ,  B82Y30/00 ,  C01B32/949 ,  C01P2004/04 ,  C01P2004/64 ,  C04B35/5626 ,  C04B2235/3847 ,  C04B2235/5454 ,  C04B2235/549 ,  Y10S977/775 ,  Y10S977/776

Abstract: The present invention relates to a method of producing nanophase powder, which can be used as materials for high-strength and wear-resistance cemented carbide. It purports to provide a method of producing WC powder of a 10˜20 nm grade by using vapor phase reaction with a precursor containing tungsten. For achieving said objectives, the method of producing WC-based powder according to the present invention comprises preparing a precursor containing tungsten; producing gas by vaporizing said precursor in a reactor; and carburizing said gas in a non-oxidizing atmosphere. The nanophase WC powder produced as such has high-strength and excellent wear-resistance, which can be suitably used as materials for carbide tools, carbide cement, wear-resistance components, or metal molds.

Abstract translation: 本发明涉及一种生产纳米相粉末的方法，可用作高强度和耐磨硬质合金的材料。 其目的是提供一种通过与含钨前体的气相反应制备10〜20nm等级的WC粉末的方法。 为了实现上述目的，本发明制备WC基粉末的方法包括制备含钨的前体; 通过在反应器中汽化所述前体来生产气体; 并在非氧化气氛中对所述气体进行渗碳。 这样生产的纳米相WC粉末具有高强度和优异的耐磨性，可适用于硬质合金工具，硬质合金水泥，耐磨组件或金属模具的材料。

公开(公告)号：US20140008589A1

公开(公告)日：2014-01-09

申请号：US13552372

申请日：2012-07-18

Applicant: Kyung Tae KIM ,  Gook Hyun HA

Inventor： Kyung Tae KIM ,  Gook Hyun HA

IPC: H01B1/20

CPC classification number: H01B1/20 ,  B82Y30/00 ,  H01L35/12 ,  H01L35/16 ,  H01L35/18 ,  H01L35/34

Abstract: A fabrication method of thermoelectric materials using core-shell structured nano-particles and thermoelectric materials fabricated by the same are provided. The method includes preparing core-shell structured nano-particles having thermoelectric elements coated on the surface thereof (step 1); adding and mixing the prepared core-shell structured nano-particles of step 1, bismuth (Bi) salts, tellurium (Te) salts and a surfactant in a solvent (step 2); adding and dispersing a reducing agent in the mixture of step (step 3); and heating the mixture of step 3 in which reducing agent is added and dispersed (step 4). According to the present invention, thermoelectric materials, nano-phase is homogeneously dispersed inside of thermoelectric grain boundary, can be fabricated and if the fabricated materials are used after sintering and bulking, the thermoelectric materials are maintained in a state that the nano-particles remain in dispersed phase even after sintering.

Abstract translation: 提供了使用芯壳结构的纳米颗粒的热电材料及其制造的热电材料的制造方法。 该方法包括制备具有涂覆在其表面上的热电元件的芯壳结构的纳米颗粒（步骤1）; 将制备的步骤1的核 - 壳结构纳米颗粒，铋（Bi）盐，碲（Te）盐和表面活性剂加入并混合在溶剂中（步骤2）; 在步骤（步骤3）的混合物中加入和分散还原剂; 并加热其中添加和分散还原剂的步骤3的混合物（步骤4）。 根据本发明，可以制造热电材料纳米相均匀地分散在热电晶界内部，并且如果在烧结和膨胀之后使用制造的材料，则将热电材料保持在纳米颗粒保持的状态 即使在烧结后也是分散相。

公开(公告)号：US20110284804A1

公开(公告)日：2011-11-24

申请号：US12883803

申请日：2010-09-16

Applicant: Kyung Tae Kim ,  Gook Hyun Ha ,  Dong Won Kim

Inventor： Kyung Tae Kim ,  Gook Hyun Ha ,  Dong Won Kim

IPC: H01B1/04

CPC classification number: H01B1/18 ,  B22F9/04 ,  B22F9/24 ,  B22F2998/10 ,  C22C12/00 ,  C22C26/00 ,  C22C47/14 ,  C22C49/12 ,  C22C49/14 ,  H01L35/22 ,  H01L35/26 ,  H01L35/34 ,  B22F3/105

Abstract: The thermoelectric material according to the present invention is characterized in that carbon nanotubes are dispersed in thermoelectric matrix powder by mechanically grinding, mixing, and treating by heating a mixed powder formed through a chemical reaction after mixing a first solution in which carbon nanotubes are dispersed and a second solution containing metallic salts. Further, a method for fabricating the thermoelectric material includes fabricating the first solution and the second solution, mixing the first solution and the second solution with each other to form a mixed solution, forming and growing a mixed powder in which carbon nanotubes and metals are mixed by a chemical reaction of the mixed solution, mechanically grinding and mixing the mixed powder, and heating the ground-and-mixed mixed powder to form the thermoelectric material. In addition, a composite can be made from the thermoelectric material by performing a spark plasma sintering process using the thermoelectric material, and has an improved thermoelectric efficiency due to the carbon nanotubes dispersed in the thermoelectric materials.

Abstract translation: 根据本发明的热电材料的特征在于，通过在将分散有碳纳米管的第一溶液与第一溶液分散后，通过加热通过化学反应形成的混合粉末进行机械研磨，混合和处理，将碳纳米管分散在热电基质粉末中 含有金属盐的第二溶液。 此外，制造热电材料的方法包括制造第一溶液和第二溶液，将第一溶液和第二溶液彼此混合以形成混合溶液，形成和生长其中混合有碳纳米管和金属的混合粉末 通过混合溶液的化学反应，机械研磨和混合混合粉末，并加热研磨和混合的混合粉末以形成热电材料。 此外，可以通过使用热电材料进行放电等离子体烧结工艺，从热电材料制成复合材料，并且由于碳纳米管分散在热电材料中而具有改善的热电效率。

公开(公告)号：US06293989B1

公开(公告)日：2001-09-25

申请号：US09586544

申请日：2000-05-31

Applicant: Byoung Kee Kim ,  Gook Hyun Ha ,  Dong Won Lee

Inventor： Byoung Kee Kim ,  Gook Hyun Ha ,  Dong Won Lee

IPC: B22F100

CPC classification number: C22C1/055 ,  B22F2998/00 ,  B22F2998/10 ,  B22F1/0044 ,  B22F1/0018 ,  B22F9/026 ,  B22F9/04 ,  B22F9/22

Abstract: The present invention relates to a method of producing nanophase WC/TiC/Co composite powder by means of a mechano-chemical process comprising a combination of mechanical and chemical methods. For this purpose, the present invention provides a method of producing nanophase WC/TiC/Co composite powder, said method comprising as follows: a process of producing an initial powder by means of spray-drying from water-soluble salts containing W, Ti, and Co; a process of heating to remove the salts and moisture contained in the initial powder after spray-drying; a process of mechanically ball-milling to grind oxide powder after removing the salts and moisture therefrom, and to homogeneously mix the powder with an addition of carbon; and a process of heating the powder after milling, for reduction and carburization, in an atmosphere of reductive gas or non-oxidative gas.

Abstract translation: 本发明涉及通过包括机械和化学方法的组合的机械化学方法制备纳米相WC / TiC / Co复合粉末的方法。 为此，本发明提供一种生产纳米相WC / TiC / Co复合粉末的方法，所述方法包括如下步骤：通过喷雾干燥从W，Ti， 和Co 在喷雾干燥之后加热以除去初始粉末中所含的盐和水分; 在从其中除去盐和水分后机械球磨以研磨氧化物粉末的方法，并均匀混合粉末与加入的碳; 以及在还原气体或非氧化性气体的气氛中研磨后对粉末进行加热，还原和渗碳的工序。

公开(公告)号：US09336922B2

公开(公告)日：2016-05-10

申请号：US13552372

申请日：2012-07-18

Applicant: Kyung Tae Kim ,  Gook Hyun Ha

Inventor： Kyung Tae Kim ,  Gook Hyun Ha

IPC: H01L35/16 ,  H01B1/20 ,  B82Y30/00 ,  H01L35/12 ,  H01L35/18 ,  H01L35/34

CPC classification number: H01B1/20 ,  B82Y30/00 ,  H01L35/12 ,  H01L35/16 ,  H01L35/18 ,  H01L35/34

Abstract: A fabrication method of thermoelectric materials using core-shell structured nano-particles and thermoelectric materials fabricated by the same are provided. The method includes preparing core-shell structured nano-particles having thermoelectric elements coated on the surface thereof (step 1); adding and mixing the prepared core-shell structured nano-particles of step 1, bismuth (Bi) salts, tellurium (Te) salts and a surfactant in a solvent (step 2); adding and dispersing a reducing agent in the mixture of step (step 3); and heating the mixture of step 3 in which reducing agent is added and dispersed (step 4). According to the present invention, thermoelectric materials, nano-phase is homogeneously dispersed inside of thermoelectric grain boundary, can be fabricated and if the fabricated materials are used after sintering and bulking, the thermoelectric materials are maintained in a state that the nano-particles remain in dispersed phase even after sintering.

Abstract translation: 提供了使用芯壳结构的纳米颗粒的热电材料及其制造的热电材料的制造方法。 该方法包括制备具有涂覆在其表面上的热电元件的芯壳结构的纳米颗粒（步骤1）; 将制备的步骤1的核 - 壳结构纳米颗粒，铋（Bi）盐，碲（Te）盐和表面活性剂加入并混合在溶剂中（步骤2）; 在步骤（步骤3）的混合物中加入和分散还原剂; 并加热其中添加和分散还原剂的步骤3的混合物（步骤4）。 根据本发明，可以制造热电材料纳米相均匀地分散在热电晶界内部，并且如果在烧结和膨胀之后使用制造的材料，则将热电材料保持在纳米颗粒保持的状态 即使在烧结后也是分散相。

公开(公告)号：US20110083712A1

公开(公告)日：2011-04-14

申请号：US12596445

申请日：2008-04-10

Applicant: Gook Hyun Ha ,  Ji Hun Yu ,  Gil Gun Lee

Inventor： Gook Hyun Ha ,  Ji Hun Yu ,  Gil Gun Lee

IPC: H01L35/30

CPC classification number: H01L35/32 ,  H01L35/34

Abstract: Provided is a thermoelectric module including electrodes and P-type and N-type semiconductors formed on a substrate by a printing method. The thermoelectric module includes upper and lower substrates (110 and 120) formed of ceramic or aluminum and forming upper and lower surfaces of the thermoelectric module; electrodes (130) disposed on surfaces of the upper and lower substrates (110 and 120), the electrodes being formed of an electrically conductive material for transmitting electric power; a plurality of P-type and N-type semiconductors (140 and 150) spaced between the electrodes (130), the P-type and N-type semiconductors (140 and 150) being forming by sintering a paste mixture of thermoelectric powder and an organic solvent, wherein the electrodes (130) and the P-type and N-type semiconductors (140 and 150) are formed by a printing method. With this configuration, thin thermoelectric module having various sizes and shapes can be provided.

Abstract translation: 提供了一种热电模块，其包括通过印刷方法形成在基板上的电极和P型和N型半导体。 热电模块包括由陶瓷或铝形成并形成热电模块的上表面和下表面的上基板和下基板（110和120） 设置在上基板和下基板的表面上的电极（130），电极由用于传输电力的导电材料形成; 在电极（130）之间隔开的多个P型和N型半导体（140和150），P型和N型半导体（140和150）通过烧结热电粉末和 有机溶剂，其中通过印刷方法形成电极（130）和P型和N型半导体（140和150）。 利用这种构造，可以提供具有各种尺寸和形状的薄型热电模块。

公开(公告)号：US07118724B2

公开(公告)日：2006-10-10

申请号：US10747656

申请日：2003-12-30

Applicant: Byung Kee Kim ,  Jin Chun Kim ,  Gook Hyun Ha ,  Chul Jin Choi

Inventor： Byung Kee Kim ,  Jin Chun Kim ,  Gook Hyun Ha ,  Chul Jin Choi

IPC: C01B31/34 ,  C01G41/00

CPC classification number: C01B32/949 ,  Y10S977/775 ,  Y10S977/776

Abstract: Nanophase WC powder is produced by preparing a precursor including tungsten; producing gas by vaporizing or sublimating the precursor; carbonizing the gas in the atmosphere without oxygen while maintaining pressure below atmospheric pressure; and condensing the carbonized gas

Abstract translation: 通过制备包含钨的前体制备纳米相WC粉末; 通过蒸发或升华前体产生气体; 在保持低于大气压的压力的同时，在没有氧的气氛中碳化气体; 并冷凝碳化气体