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公开(公告)号：KR100839827B1
公开(公告)日：2008-06-19
申请号：KR1020070028616
申请日：2007-03-23
Applicant: 한국과학기술연구원
CPC classification number: C01B35/04
Abstract: A method for preparing a nano-sized transition metal boride powder simply and inexpensively is provided. A method for preparing a transition metal boride powder comprises: a step(S10) of mixing a transition metal halide powder with an alkali metal borohydride powder to prepare a mixed powder; a step(S20) of injecting the mixed power and a plurality of balls into a reaction vessel; a step(S30) of charging inert gas into the reaction vessel and sealing the reaction vessel; a step(S40) of ball-milling the mixed powder using high energy to prepare a composite powder comprising a transition metal boride and an alkali metal halide; a step(S50) of dispersing the composite powder into water, dissolving the alkali metal halide into water, and filtering the dissolved solution; and a step(S60) of drying the filtered composite powder to recover a transition metal boride powder, wherein in the step of recovering the transition metal boride powder, the transition metal boride powder has a particle size of greater than 0 to not greater than 100 nm. Further, in the step(S10), a molar ratio of the alkali metal borohydride powder to the transition metal halide powder is 0.3 to 3, and a alkali metal hydride powder is additionally mixed in the mixed powder.
Abstract translation: 提供了简单且廉价地制备纳米尺寸的过渡金属硼化物粉末的方法。 制备过渡金属硼化物粉末的方法包括：将过渡金属卤化物粉末与碱金属硼氢化物粉末混合以制备混合粉末的步骤（S10） 将混合动力和多个球喷射到反应容器中的步骤（S20）; 将惰性气体装入反应容器并密封反应容器的步骤（S30）; 使用高能量球磨所述混合粉末的步骤（S40），以制备包含过渡金属硼化物和碱金属卤化物的复合粉末; 将复合粉末分散在水中的步骤（S50），将碱金属卤化物溶解在水中，并过滤溶解的溶液; 以及干燥过滤的复合粉末以回收过渡金属硼化物粉末的步骤（S60），其中在回收过渡金属硼化物粉末的步骤中，过渡金属硼化物粉末具有大于0至不大于100的粒度 纳米。 此外，在步骤（S10）中，碱金属硼氢化物粉末与过渡金属卤化物粉末的摩尔比为0.3〜3，在混合粉末中另外混合碱金属氢化物粉末。
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公开(公告)号：KR100708402B1
公开(公告)日：2007-04-18
申请号：KR1020050101812
申请日：2005-10-27
Applicant: 한국과학기술연구원
Abstract: 본 발명은 금속알루미늄수소화물 탈수소화반응 나노촉매 제조 및 분산 방법에 관한 것으로서, 보다 상세하게는 염화전이금속(TMCl
3 ), 염화알루미늄(AlCl
3 ) 및 마그네슘(Mg) 분말을 원료분말로 하여 반응밀링법(reaction milling)에 의해 전이금속알루미나이드(TM
x Al
y ) 나노분말을 제조하고, 상기 제조된 나노분말을 금속알루미늄수소화물(metal aluminum hydride)에 탈수소화반응 촉매로 분산시키는 방법에 관한 것이다.
본 발명에 의하면, 염화전이금속(TMCl
3 ) 분말, 염화알루미늄(AlCl
3 ) 분말 및 마그네슘(Mg) 분말을 x:y:1.5(x+y)의 몰비로 혼합하는 단계와(x, y는 정수); 상기 혼합 분말을 소정 직경의 볼과 함께 반응용기에 투입한 후 하이에너지볼밀링을 1~20 시간 수행하여 전이금속알루미나이드/염화마그네슘(TM
x Al
y /MgCl
2 ) 복합분말을 생성하는 단계와; 상기 생성된 복합분말을 물에 분산시켜 염화마그네슘을 선택적으로 용해한 후 필터링하여 전이금속알루미나이드 나노분말을 생성하는 단계를 포함하는 금속알루미늄수소화물 탈수소화반응 나노촉매 제조방법을 제시한다.
금속알루미늄수소화물, 탈수소화반응, 나노촉매, 하이에너지볼밀링Abstract translation: 本发明涉及一种制备和分散金属氢化铝脱氢催化剂的方法，更具体地说，
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公开(公告)号：KR100528046B1
公开(公告)日：2005-11-15
申请号：KR1020030058941
申请日：2003-08-26
Applicant: 한국과학기술연구원
CPC classification number: B22F1/0044 , C22C1/1084 , C22C29/06
Abstract: 본 발명은 초미세 결정립 서메트 제조방법에 관한 것으로서, 특히 탄화물 결정립 내부에 코어-림 구조가 없는 균일한 고용체 형태의 매우 미세한 복합탄화물 결정립을 갖는 TiC계 서메트를 제조하는 방법에 관한 것이다.
본 발명의 목적은 코어-림 구조를 갖지않으며, 성분면에서 균일한 미세조직을 가지고 서브마이크론 크기의 결정립을 갖는 TiC계 서메트의 제조 방법을 제공하는 것이다. 이러한 본 발명의 목적은 기계화학적 합성법(고에너지 볼밀링)에 의해 얻어진 Ti-TM(TM=전이금속) 복합탄화물과 Ni-Co 금속상이 공존하는 나노복합분말, (Ti,TM)C-(Co,Ni)을 일반적인 방법으로 소결함으로써 달성될 수 있다.-
44.发明公开
公开(公告)号：KR1020050021753A
公开(公告)日：2005-03-07
申请号：KR1020030058941
申请日：2003-08-26
Applicant: 한국과학기술연구원
CPC classification number: B22F1/0044 , C22C1/1084 , C22C29/06
Abstract: PURPOSE: To provide a method for preparing TiC-based cermet without core-rim structure, and a method for preparing high hardness TiC-based cermet having a microstructure in which components are uniform and having a grain size of submicron. CONSTITUTION: The method for preparing ultrafine grained cermet with homogeneous solid solution grain structure comprises: a step of producing a mixed powder consisting of 50 to 90 wt.% of TiC, 5 to 30 wt.% of TMxCy(x and y are integers) and 5 to 30 wt.% of nickel(Ni), cobalt(Co), or a mixture of nickel(Ni) and cobalt(Co) by mixing titanium(Ti) powder, transition metals(TM) powder, carbon(C) powder, nickel(Ni) powder and cobalt(Co) powder; a step of producing nano-composite powder, (Ti,TM)C-(Ni,Co) by performing high energy ball milling after injecting the mixed powder along with balls having a certain diameter into a reaction container; and a step of forming and sintering the produced nano-composite powder.
Abstract translation: 目的：提供一种无核心结构的TiC基金属陶瓷的制备方法，以及制备具有均匀且亚微米粒径的组织的高硬度TiC系金属陶瓷的方法。 构成：制备具有均匀固溶晶粒结构的超细晶粒金属陶瓷的方法包括：制备由50-90重量％的TiC，5-30重量％的TMxCy（x和y是整数）组成的混合粉末的步骤， 通过混合钛（Ti）粉末，过渡金属（TM）粉末，碳（C）等），镍（Ni），钴（Co）或镍（Ni）和钴 粉末，镍（Ni）粉末和钴（Co）粉末; 通过在将混合粉末与具有一定直径的球注入反应容器之后进行高能球磨，制备（Ti，TM）C-（Ni，Co）的纳米复合粉末的步骤; 以及形成和烧结所制备的纳米复合粉末的步骤。
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公开(公告)号：KR100456797B1
公开(公告)日：2004-11-10
申请号：KR1020020023973
申请日：2002-05-01
Applicant: 한국과학기술연구원
Abstract: PURPOSE: A fabrication method of nanocrystalline titanium nitride/titanium-metal compound composite powder by forming titanium nitride and titanium intermetallic compound by reaction milling using titanium and metal nitride as raw material powder is provided. CONSTITUTION: The method comprises the processes of mixing titanium (Ti) powder having purity of 95% or more and particle size of 100 nm or less with metal nitride powder having purity of 95% or more and particle size of 50 nm or less in a mole ratio of 1:1 to 20:1; injecting the mixture along with balls having diameter of 5 to 30 mm into a reaction jar; introducing argon (Ar), nitrogen or air into a reaction chamber; and performing high energy ball milling on the mixture, wherein the metal nitride is selected from boron nitride (BN), silicon nitride (Si3N4) and aluminum nitride (AlN), wherein the reaction chamber and balls are made of tool steel, stainless steel, hard metal or zirconia, wherein the mixture and balls are injected into the reaction chamber in a weight ratio of 1:1 to 1:100, wherein the milling process is performed using shaker mill, planetary mill or attritor mill, wherein particle size of powder formed by the reaction milling is 10 nm or less, and wherein the milling process is performed for 1 to 48 hours.
Abstract translation: 目的：提供一种通过使用钛和金属氮化物作为原料粉末通过反应研磨来形成氮化钛和钛金属间化合物的纳米晶氮化钛/钛 - 金属化合物复合粉末的制造方法。 该方法包括以下步骤：将具有95％或更高的纯度和100nm或更小的粒度的钛（Ti）粉末与纯度为95％或更高且粒径为50nm或更小的金属氮化物粉末 摩尔比为1：1至20：1; 将该混合物与直径为5至30mm的球一起注入反应罐中; 将氩（Ar），氮气或空气引入反应室; 对所述混合物进行高能球磨，所述金属氮化物选自氮化硼（BN），氮化硅（Si3N4）和氮化铝（AlN），所述反应室和球体由工具钢，不锈钢， 硬金属或氧化锆，其中混合物和球以1：1至1：100的重量比注入反应室中，其中研磨过程使用振动研磨机，行星式研磨机或超微磨碎机进行，其中粉末 通过反应研磨而形成的颗粒为10nm或更小，并且其中研磨过程进行1至48小时。
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公开(公告)号：KR101697275B1
公开(公告)日：2017-01-17
申请号：KR1020150016568
申请日：2015-02-03
Applicant: 한국과학기술연구원
Abstract: 본발명의한 실시예에따른복합체는지르코늄의수소친화력보다낮은수소친화력을갖는금속입자, 그리고지르코늄수소화물또는지르코늄산화물을포함하고, 금속입자와, 지르코늄수소화물또는지르코늄산화물이서로교번하여위치한다.
Abstract translation: 根据本发明的一个实施方案，复合物包含金属颗粒和氢化锆或氧化锆。 与锆的氢亲和力相比，金属颗粒具有较低的氢亲和力。 金属颗粒，氢化锆或氧化锆相互交替地定位。 该复合物具有增强的催化活性。
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