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公开(公告)号：KR1020030085371A
公开(公告)日：2003-11-05
申请号：KR1020020023774
申请日：2002-04-30
Applicant: 한국과학기술연구원
IPC: C04B35/573
CPC classification number: C04B35/63 , B82Y30/00 , C04B35/573 , C04B35/634 , C04B2235/3826 , C04B2235/422 , C04B2235/428 , C04B2235/48 , C04B2235/5436 , C04B2235/5454 , C04B2235/604 , C04B2235/608 , C04B2235/77
Abstract: PURPOSE: Provided is a method for producing a reaction bonding silicon carbide, which supplies melted silicon effectively regardless of the form, size and thickness of the reaction bonding silicon carbide, prevents the cohesion of the melted silicon, and supplies the melted silicon uniformly. CONSTITUTION: The method comprises the steps of: preparing a silicon supplying specimen composed of a silicon powder and a thermosetting resin selected from the group consisting of a phenol resin, a furfuryl alcohol resin and an epoxy resin as a binding agent; preparing a silicon carbide/carbon filling body; contacting the silicon supplying specimen to one side of the filling body in a reaction bonding furnace; and heat treating at the temperature higher than the melting point of the silicon under vacuum or an inert atmosphere to infiltrate the melted silicon in the silicon supplying specimen into the inside of the filling body.
Abstract translation: 目的：提供一种生产反应接合碳化硅的方法，无论反应结合碳化硅的形式，尺寸和厚度如何，均有效地提供熔融硅，防止熔融硅的内聚力，并均匀地供应熔融的硅。 方法：该方法包括以下步骤：制备由硅粉末和选自酚醛树脂，糠醇树脂和环氧树脂作为粘合剂的热固性树脂组成的供硅试样; 制备碳化硅/碳填充体; 在反应接合炉中使供硅试样与填充体的一侧接触; 在高于真空或惰性气氛的硅的熔点的温度下进行热处理，将硅供应试样中的熔融硅浸入填充体的内部。
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公开(公告)号：KR1020030073445A
公开(公告)日：2003-09-19
申请号：KR1020020013003
申请日：2002-03-11
Applicant: 한국과학기술연구원
IPC: B01J2/06
Abstract: PURPOSE: A method for preparing powder granules by liquid condensation process is provided to economically prepare uniform granules without defects, and a method for compacting powder granules by liquid condensation process is provided to freely change compaction density of granules and improve compactibility of powder granules. CONSTITUTION: The method comprises the processes of preparing slurry by mixing powder and binder with solvent(13) soluble for the binder; dropping the slurry into solvent insoluble for the binder, thereby fixing the binder so that the binder is prevented from coming out of the surface of droplets, and causing replacement between the soluble solvent and insoluble solvent inside the droplets on the surface of dropped slurry droplets, thereby condensing the droplets; and completely removing residual solvent by drying the separated droplets after separating condensed droplets from the insoluble solvent. The method for compacting powder granules by liquid condensation process comprises the processes of preparing slurry by mixing powder to be compacted and binder with solvent soluble for the binder; dropping the slurry into solvent insoluble for the binder, thereby fixing the binder so that the binder is prevented from coming out of the surface of droplets, and causing replacement between the soluble solvent and insoluble solvent inside the droplets on the surface of dropped slurry droplets, thereby condensing the droplets; completely removing residual solvent by drying the separated droplets after separating condensed droplets from the insoluble solvent; preparing green compact by pressing the dried granules in mold; and degreasing the binder by heating the green compact.
Abstract translation: 目的：提供一种通过液体缩合方法制备粉末颗粒的方法，以经济地制备无缺陷的均匀颗粒，并提供通过液体冷凝方法压实粉末颗粒的方法，以自由改变颗粒的压实密度并提高粉末颗粒的紧密度。 构成：该方法包括通过将粉末和粘合剂与可溶于粘合剂的溶剂（13）混合来制备浆料的方法; 将浆料滴入不溶于粘合剂的溶剂中，由此固定粘合剂，从而防止粘合剂从液滴的表面流出，并引起可滴落的液滴表面上的液滴内的可溶性溶剂和不溶性溶剂之间的置换， 从而冷凝液滴; 并在从不溶性溶剂中分离出浓缩的液滴后，通过干燥分离的液滴来完全除去残余溶剂。 通过液体冷凝法压粉粉末颗粒的方法包括通过将要压实的粉末和粘合剂与可溶于粘合剂的溶剂混合来制备浆料的方法; 将浆料滴入不溶于粘合剂的溶剂中，由此固定粘合剂，从而防止粘合剂从液滴的表面流出，并引起可滴落的液滴表面上的液滴内的可溶性溶剂和不溶性溶剂之间的置换， 从而冷凝液滴; 在从不溶性溶剂中分离浓缩的液滴后，通过干燥分离出的液滴来完全除去残留溶剂; 通过在模具中挤压干燥的颗粒制备生坯; 并通过加热生坯来去除粘合剂。
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公开(公告)号：KR100439738B1
公开(公告)日：2004-07-12
申请号：KR1020020013003
申请日：2002-03-11
Applicant: 한국과학기술연구원
IPC: B01J2/06
Abstract: Powder granules are prepared by preparing slurry by mixing powders, binding agent, and binding agent soluble solvent; dropping slurry to binding agent insoluble solvent; coagulating droplet by solvent exchange between the soluble and insoluble solvents; and separating the coagulated droplet from the insoluble solvent. The preparation of powder granules involves preparing slurry by mixing powders, binding agent, and binding agent soluble solvent; dropping slurry to binding agent insoluble solvent to fix the binding agent so that it can not be released to a surface of the droplet of the slurry; coagulating the droplet by solvent exchange between the soluble solvent inside the droplet and the insoluble solvent at the surface of the droplet; and separating the coagulated droplet from the insoluble solvent, drying it, and removing a residual solvent. An independent claim is also included for a method for shaping powder granules by liquid condensation comprising preparing the slurry; dropping the slurry to the binding agent insoluble solvent; coagulating the droplet; separating the coagulated droplet from the insoluble solvent; pressurizing the dried granules in a metal mold to fabricate a shaped body; and removing the binding agent by heating the shaped body.
Abstract translation: 通过混合粉末，粘合剂和粘合剂可溶性溶剂制备浆料来制备粉末颗粒; 将浆液滴入粘合剂不溶溶剂中; 通过可溶性和不溶性溶剂之间的溶剂交换使凝固液凝固; 并将凝结的液滴与不溶性溶剂分离。 粉末颗粒的制备包括通过混合粉末，粘合剂和粘合剂可溶性溶剂来制备浆料; 将浆料滴入粘合剂不溶溶剂中以固定粘合剂，使其不能被释放到浆料液滴的表面; 通过液滴内部的可溶性溶剂与液滴表面处的不溶性溶剂之间的溶剂交换来使液滴凝固; 并将凝结的液滴从不溶性溶剂中分离出来，将其干燥并除去残余溶剂。 还包括一种独立权利要求，用于通过液体冷凝使粉末颗粒成形的方法，包括制备浆料; 将浆料滴入粘合剂不溶溶剂中; 凝结小滴; 将凝结的液滴与不溶性溶剂分离; 在金属模具中加压干燥的颗粒以制造成型体; 并通过加热成形体来去除粘合剂。
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Patent Agency Ranking
公开(公告)号：KR100434830B1
公开(公告)日：2004-06-07
申请号：KR1020010047604
申请日：2001-08-08
Applicant: 한국과학기술연구원
IPC: C04B35/622
CPC classification number: C04B35/634 , C04B35/573 , C04B35/6264 , C04B35/62655 , C04B35/62695 , C04B35/638 , C04B2235/3217 , C04B2235/3826 , C04B2235/48 , C04B2235/5436 , C04B2235/5445 , C04B2235/602 , C04B2235/94
Abstract: Disclosed is a method for manufacturing composite granules having a homogeneous particle distribution, comprising powders of multimodal particle size distribution and phenol resins, and a method for manufacturing green bodies having homogeneous microstructure without particle separation from the granules.
Abstract translation: 本发明公开了一种用于制造具有均匀颗粒分布的复合颗粒的方法，所述复合颗粒包含多峰颗粒尺寸分布的粉末和酚醛树脂，以及用于制造具有均质微结构的生坯的方法，其中颗粒不与颗粒分离。
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公开(公告)号：KR100471652B1
公开(公告)日：2005-03-08
申请号：KR1020020023774
申请日：2002-04-30
Applicant: 한국과학기술연구원
IPC: C04B35/573
CPC classification number: C04B35/63 , B82Y30/00 , C04B35/573 , C04B35/634 , C04B2235/3826 , C04B2235/422 , C04B2235/428 , C04B2235/48 , C04B2235/5436 , C04B2235/5454 , C04B2235/604 , C04B2235/608 , C04B2235/77
Abstract: 본 발명은 규소분말과 결합제로서 열경화성 수지로 구성되는 소정 형태의 규소공급 시편을 준비하고, 탄화규소/탄소 충전체를 준비하고, 반응결합로 내에서 상기 충전체의 일면에 상기 규소공급 시편을 접촉시키고, 진공 또는 비활성 분위기하에서 규소의 용융온도로 열처리하여 규소공급시편 내의 용융규소를 충전체 내부로 침윤시키는 것을 포함하여 이루어지는 반응결합 탄화규소 제조방법을 제공한다. 본 발명에 의하면, 반응결합 탄화규소의 형상, 크기, 두께에 관계없이 가장 효율적으로 용융 규소를 공급하면서도 용융 규소의 응집을 방지하고 용융 규소의 균일한 공급이 가능하다.
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公开(公告)号：KR100435006B1
公开(公告)日：2004-06-09
申请号：KR1020010047605
申请日：2001-08-08
Applicant: 한국과학기술연구원
IPC: C04B35/573 , C04B35/622
Abstract: PURPOSE: Provided is a manufacturing method of high density preforms for sintered silicon carbides(SiC) which have no separation of particle sizes and no compaction defects by pressing powder with wide particle size distribution. CONSTITUTION: The preforms with homogeneous compaction are manufactured by the following steps of; (i) mixing SiC powder with wide particle size distribution, 1-20wt.%(based on the powder) of phenol resin, and alcohol(ethyl or butyl alcohol); (ii) dropping the mixed slurry into water or hardener-contained water(70-90deg.C), and mixing strongly for 5-30min to form granules; (iii) filtering and washing; (iv) drying granules at 70deg.C or lower; (v) feeding granules to a mold and pressing under pressure of 0.1-50MPa for 5-60min for homogeneously compacted preforms; and (vi) thermal treating the preforms at 400-1250deg.C in inert gas atmosphere or vacuum, which results in that carbon residue is obtained from decomposition of phenol resin and strength of preforms is increased by densification of carbon residue.
Abstract translation: 目的：提供一种用于烧结碳化硅（SiC）的高密度预成型坯的制造方法，该方法通过压制具有宽粒度分布的粉末而没有粒度分离和压实缺陷。 组成：均质压实的预成型坯通过以下步骤制造： （i）混合具有宽粒度分布的SiC粉末，酚醛树脂和醇（乙基或丁醇）的1-20wt。％（基于粉末）; （ii）将混合浆料滴入水或含硬化剂的水（70-90℃）中，强烈混合5-30分钟以形成颗粒; （iii）过滤和洗涤; （iv）在70℃或更低温度下干燥颗粒; （v）将颗粒加入模具中，并在0.1-50MPa的压力下压制5-60分钟，以获得均匀压实的预制件; 和（vi）在惰性气氛或真空下在400-1250℃温度下热处理预成型坯，这导致由酚醛树脂的分解获得碳残余物，并且通过炭渣的致密化增加预成型坯的强度。
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公开(公告)号：KR1020030013543A
公开(公告)日：2003-02-15
申请号：KR1020010047605
申请日：2001-08-08
Applicant: 한국과학기술연구원
IPC: C04B35/573 , C04B35/622
CPC classification number: C04B35/573 , C04B35/62695 , C04B2235/3826
Abstract: PURPOSE: Provided is a manufacturing method of high density preforms for sintered silicon carbides(SiC) which have no separation of particle sizes and no compaction defects by pressing powder with wide particle size distribution. CONSTITUTION: The preforms with homogeneous compaction are manufactured by the following steps of; (i) mixing SiC powder with wide particle size distribution, 1-20wt.%(based on the powder) of phenol resin, and alcohol(ethyl or butyl alcohol); (ii) dropping the mixed slurry into water or hardener-contained water(70-90deg.C), and mixing strongly for 5-30min to form granules; (iii) filtering and washing; (iv) drying granules at 70deg.C or lower; (v) feeding granules to a mold and pressing under pressure of 0.1-50MPa for 5-60min for homogeneously compacted preforms; and (vi) thermal treating the preforms at 400-1250deg.C in inert gas atmosphere or vacuum, which results in that carbon residue is obtained from decomposition of phenol resin and strength of preforms is increased by densification of carbon residue.
Abstract translation: 目的：提供一种用于烧结碳化硅（SiC）的高密度预成型件的制造方法，其通过压制具有宽的粒度分布的粉末而不具有粒径分离和压实缺陷。 构成：具有均匀压实的预成型件通过以下步骤制造： （i）混合具有宽粒度分布的SiC粉末，1-20重量％（基于粉末）的酚醛树脂和醇（乙基或丁醇）; （ii）将混合的浆料滴入水或含硬化剂的水（70-90℃）中，并强烈搅拌5-30分钟以形成颗粒; （iii）过滤和洗涤; （iv）干燥70度以下的颗粒; （v）将颗粒送入模具中，并在0.1-50MPa的压力下压制均匀压实的预制件5-60分钟; 和（vi）在惰性气氛或真空中在400-1250℃热处理预制品，这导致由酚醛树脂分解获得碳残余物，并通过碳残余物的致密化来增加预成型体的强度。
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公开(公告)号：KR1020030013542A
公开(公告)日：2003-02-15
申请号：KR1020010047604
申请日：2001-08-08
Applicant: 한국과학기술연구원
IPC: C04B35/622
CPC classification number: C04B35/634 , C04B35/573 , C04B35/6264 , C04B35/62655 , C04B35/62695 , C04B35/638 , C04B2235/3217 , C04B2235/3826 , C04B2235/48 , C04B2235/5436 , C04B2235/5445 , C04B2235/602 , C04B2235/94
Abstract: PURPOSE: Provided is a manufacturing method of tube compacts with no separation of particle sizes and homogeneous microstructure by centrifugal casting compound granules including powder with wide particle size distribution and phenol resin in the presence of solvent unlike conventional press forming. CONSTITUTION: The homogeneous centrifugally-cast compacts are manufactured by the following steps of; (i) mixing Al2O3 or SiC powder with wide particle size distribution, 1-20wt.%(based on the powder) of phenol resin, and alcohol(ethyl or butyl alcohol); (ii) dropping the mixed slurry into water or hardener-contained water(70-90deg.C), and mixing strongly for 5-30min. to form compound granules; (iii) filtering and washing; (iv) drying the granules at 70deg.C or lower; (v) centrifugal casting for increase of compaction by feeding granules in a mold, adding water, alcohol, or water-alcohol to fill 20-100% of pores formed by granules, and centrifuging at the velocity of 2-100times more speedy than the acceleration of gravity for 0.5-2hrs with heating(80-110deg.C); (vi) holding the compacts at 50-80deg.C for 2-10hrs for removing remained solvent and hardening phenol resin completely; (vii) removing fats from the compacts in inert gas atmosphere or vacuum for compacts with carbon residue, or air atmosphere for compacts without carbon residue.
Abstract translation: 目的：提供一种管式压块的制造方法，其与常规压制成型不同，在溶剂存在下，溶剂存在下，通过离心铸造复合颗粒（包括具有宽粒径分布的粉末）和酚醛树脂，不分离颗粒尺寸和均匀的微观结构。 构成：均匀的离心铸造压块通过以下步骤制造： （i）混合具有宽粒度分布的Al 2 O 3或SiC粉末，1-20重量％（基于粉末）的酚醛树脂和醇（乙基或丁醇）; （ii）将混合的浆料倒入水或含硬化剂的水（70-90℃）中，并强烈搅拌5-30分钟。 形成复合颗粒; （iii）过滤和洗涤; （iv）将颗粒干燥至70℃或更低; （v）离心铸造用于通过在模具中喂入颗粒来增加压实，加入水，醇或水 - 醇以填充由颗粒形成的20-100％的孔，并以比所述颗粒高2-100倍的速度离心 重力加速0.5-2小时，加热（80-110℃）; （vi）在50-80℃保持压块2-10小时，完全除去残留的溶剂和硬化酚醛树脂; （vii）在惰性气体气氛中从压实物中除去脂肪，或者用碳残留物除去压实物的真空，或没有碳残留的压块的空气气氛中。
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