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公开(公告)号：KR1019970001064B1
公开(公告)日：1997-01-25
申请号：KR1019940005128
申请日：1994-03-15
Applicant: 한국과학기술연구원
IPC: C04B35/48
CPC classification number: C04B35/488
Abstract: Tetragonal zirconia polycrystal composite having a high ductility and low- temperature antidegradation properties is manufacturied by mixing nontransposable zirconia with below 60 wt. % of transposable zirconia based on nontransposable zirconia and sintering at 1,550 deg.C for 2-10 hr. Transposable zirconia is poduced by mixing a mixture of 93-97% of ZrO2 and 2-4% of Y2O3 with 1-3% of Nb2O5 or 1-3% OF Ta2O5.
Abstract translation: 具有高延展性和低温抗降解性能的四面体氧化锆多晶复合材料通过将不可转移的氧化锆与低于60wt。 基于非转移性氧化锆的转座氧化锆的％，并在1550℃下烧结2-10小时。 通过将93-97％的ZrO 2和2-4％的Y 2 O 3与1-3％的Nb 2 O 5或1-3％的Ta 2 O 5混合来混合转移的氧化锆。
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公开(公告)号：KR1020040105370A
公开(公告)日：2004-12-16
申请号：KR1020030036622
申请日：2003-06-07
Applicant: 한국과학기술연구원
IPC: C04B35/10
CPC classification number: C04B35/10 , B32B18/00 , B32B2597/00 , C04B35/62605 , C04B35/62645 , C04B35/632 , C04B38/0635 , C04B2111/00801 , C04B2235/61
Abstract: PURPOSE: Provided is a method for producing ceramic membrane consisting of ceramic tapes including an intermediate and a support layer with a different pore characteristic by using at least two powders. CONSTITUTION: The ceramic membrane is produced by the following steps of: (i) preparing a ceramic slurry for a support layer(1,2,3) by mixing 100pts.wt. of two kinds of alumina powders having different sizes of 0.5-3micrometer(alumina (I)) and 20-25micrometer(alumina (II)), 0.2-0.8pts.wt. of dispersant, 15-30pts.wt. of water, 5-15pts.wt. of plasticizer and 5-20pts.wt. of binder, wherein less than 45micrometer of starch is optionally added to alumina powder(II) to be a weight ratio of alumina to starch of 7:3 - 9:1; (ii) preparing at least two ceramic slurries by changing the ratio of alumina (I) to alumina (II)+ starch of 0:10, 1:9, 2:8, 3:7, 4:6, 5:5, 6:4; (iii) preparing a ceramic slurry for an intermediate layer(4) by mixing 100pts.wt. of alumina (I), 0.2-0.8pts.wt. of dispersant, 15-30pts.wt. of water, 5-15pts.wt. of plasticizer and 5-20pts.wt. of binder; (iv) forming prepared slurries into ceramic tapes for the support layer(3-5mm thick) comprising at least two ceramic tapes having different pore characteristics and particle distributions, and the intermediate layer(100-500micrometer thick); (v) layering ceramic tapes for the support layer in order of pore size and then layering ceramic tape for the intermediate layer on a tube(or rod)-shaped gypsum mold, and warm isostatic pressing to bond layered ceramic tapes under pressure of 200-300kgf at 70-80deg.C; (vi) putting layered ceramic tapes on a tube-shaped refractory, the support of a ceramic membrane; (vii) sintering layered ceramic tapes by heating to 200, 300 and 500deg.C, and holding 1hr at each temperature to remove organic materials, heating to 1050-1150deg.C and holding for 2hrs to burn starch added in the support layer, and cooling slowly; (viii) removing the shrunken gypsum mold and trimming the joint of the tube, and sintering ceramic membrane product at 1500-1700deg.C and holding for 2hrs.
Abstract translation: 目的：提供一种陶瓷膜的制造方法，该陶瓷膜由包含中间体和具有不同孔特性的支持层的陶瓷带组成，通过使用至少两种粉末。 构成：陶瓷膜通过以下步骤制备：（i）通过混合100pts.wt。 （氧化铝（I））和20-25微米（氧化铝（II））的不同尺寸的两种氧化铝粉末，0.2-0.8pts.wt。 的分散剂，15-30pts.wt。 的水，5-15pts.wt。 的增塑剂和5-20pts.wt。 的粘合剂，其中任选地将氧化铝粉末（II）中的少于45微米的淀粉加入到氧化铝与淀粉的重量比为7:3-9:1的范围内; （ii）通过改变0:10,1:9,2:8,3:7,4:6,5:5的氧化铝（I）与氧化铝（II）+淀粉的比率来制备至少两种陶瓷浆料， 6：4; （iii）通过混合100pts.wt。 的氧化铝（I），0.2-0.8pts.wt。 的分散剂，15-30pts.wt。 的水，5-15pts.wt。 的增塑剂和5-20pts.wt。 的粘合剂 （iv）将制备的浆料形成为包含至少两个具有不同孔特性和颗粒分布的陶瓷带的支撑层（3-5mm厚）的陶瓷带，以及中间层（100-500微米厚）; （v）按照孔径的顺序层叠用于支撑层的陶瓷带，然后在管（或棒）形石膏模上分层中间层的陶瓷带，并且在200〜200℃的压力下进行温等静压， 300kgf在70-80deg.C; （vi）将层状陶瓷带放置在管状耐火材料上，陶瓷膜的载体; （vii）通过加热至200,300和500℃烧结层状陶瓷带，并在每个温度下保持1小时以除去有机材料，加热至1050-1150℃并保持2小时以烧结添加在载体层中的淀粉，以及 慢慢冷却 （viii）去除收缩的石膏模具和修整管的接头，并在1500-1700℃烧结陶瓷膜产品并保持2小时。
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公开(公告)号：KR100454716B1
公开(公告)日：2004-11-05
申请号：KR1020020018287
申请日：2002-04-03
Applicant: 한국과학기술연구원
IPC: C09J7/00
Abstract: PURPOSE: Water-based ceramic slurry is provided to prevent the harm to environment and human body, to improve the drying speed of a ceramic tape, and to perform the working process at a low viscosity. CONSTITUTION: The water-based ceramic slurry comprises a metal oxide, and 0.05 to 2.0 wt% of a dispersing agent, 10 to 50 wt% of water, 3 to 17 wt% of a plasticizer and 5 to 30 wt% of an acrylic binder, based on the weight of the metal oxide. In particular, the acrylic binder comprises 40 to 70 wt% of butyl acrylate, 10 to 20 wt% of methyl methacrylate, 10 to 40 wt% of 2-hydroxyethyl methacrylate and 2 to 10 wt% of methacrylic acid, and has a glass transition temperature of -20±5 deg.C and monomer content in emulsion of 60% or more. The ceramic tape can be produced by defoaming the ceramic slurry, forming it into a sheet and then drying.
Abstract translation: 用途：提供水基陶瓷浆料，以防止对环境和人体的危害，提高陶瓷带的干燥速度，并在低粘度下进行加工过程。 组成：水基陶瓷浆料包含金属氧化物和0.05-2.0重量％分散剂，10-50重量％水，3-17重量％增塑剂和5-30重量％丙烯酸类粘合剂 ，基于金属氧化物的重量。 特别是丙烯酸系粘合剂含有丙烯酸丁酯40〜70重量％，甲基丙烯酸甲酯10〜20重量％，甲基丙烯酸2-羟乙酯10〜40重量％，甲基丙烯酸2〜10重量％，玻璃化转变 温度-20℃±5℃，乳液中单体含量60％以上。 陶瓷带可通过将陶瓷浆料消泡而形成片材然后干燥来制备。
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5.发明公开
公开(公告)号：KR1020020085055A
公开(公告)日：2002-11-16
申请号：KR1020010024315
申请日：2001-05-04
Applicant: 한국과학기술연구원
CPC classification number: C04B35/63404 , C04B35/10 , C04B35/48 , C04B35/63424 , C04B2111/00836 , C04B2111/00844 , C04B2235/3217 , C04B2235/3244 , C09J7/20
Abstract: PURPOSE: Provided is a water-based ceramic slurry using water, and polyvinyl pyrrolidone(PVP) and gelatin as solvent and a binder based on water, unlike conventional nonwater-based solvent and binder, for producing ceramic tapes. CONSTITUTION: The water-based ceramic slurry comprises the components of: metal oxide powder such as Al2O3, magnesium aluminate spinel, ZrO2, Al2O3/ZrO2 composite or spinel/ZrO2 composite; 0.01-2.0wt.% of dispersant such as polymethacrylic acid, polycarboxylic acid, ammonium polyacrylate or ether; 20-90wt.% of water; 5-20wt.% of PVP and 0.1-2.0wt.% of gelatin as a binder; 3-17wt.% of plasticizer such as triethylene glycol or polyethylene glycol. The each amount is based on the metal oxide powder and 0.3-2.0wt.%(based on the total components) surfactant is optionally added. The preparation method of ceramic tapes is as follows: mixing all components except gelatin, for a ceramic slurry with a viscosity of 1000-3000cps; defoaming by heating the slurry in boiling water(50-80deg.C); adding a gelatin solution, obtained by dissolving gelatin into water(50-80deg.C), and defoaming again; and forming the slurry into a sheet.
Abstract translation: 目的：提供一种使用水的水性陶瓷浆料，聚乙烯吡咯烷酮（PVP）和明胶作为溶剂，并且与传统的非水基溶剂和粘合剂不同，用于生产陶瓷带。 构成：水性陶瓷浆料包括：Al2O3，铝酸镁尖晶石，ZrO2，Al2O3 / ZrO2复合材料或尖晶石/ ZrO2复合材料等金属氧化物粉末; 0.01-2.0重量％的分散剂如聚甲基丙烯酸，多元羧酸，聚丙烯酸铵或醚; 20-90重量％的水; 5-20重量％的PVP和0.1-2.0重量％的明胶作为粘合剂; 3-17重量％的增塑剂如三甘醇或聚乙二醇。 每个量基于金属氧化物粉末，并且任选地加入0.3-2.0重量％（基于总组分）表面活性剂。 陶瓷带的制备方法如下：将除明胶之外的所有组分混合，制备粘度为1000-3000cps的陶瓷浆料; 通过在沸水（50-80℃）中加热浆料进行消泡; 加入明胶溶液，将明胶溶解于水（50〜80℃）中，再次脱泡; 并将浆料形成片材。
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Patent Agency Ranking
公开(公告)号：KR100162873B1
公开(公告)日：1998-11-16
申请号：KR1019960032976
申请日：1996-08-08
Applicant: 한국과학기술연구원
IPC: C04B35/46
Abstract: 본 발명은 더욱 향상된 품질계수(Q), 유전율(K)과 공진주파수의 온도계수(τ
f )를 얻기 위하여, 90에서 99몰%의 (Zr
x Sn
y )Ti
z O
4 (x+y+z=2, 0.6≤x≤1.0, 0≤y≤0.4, 0.6≤z≤1.4)를 주성분으로 하는 유전체 자기 조성물에 0.5에서 5.0몰%의 산화마그네슘 및 0.5에서 5.0몰%의 산화탄탈륨 또는 0.5에서 5.0몰%의 산화니오비늄의 복합물이 첨가되고 이에 부가하여 0.75에서 1.5중량%의 산화아연이 가해져 소결된 고주파용 유전체 자기 조성물을 제공한다.-
公开(公告)号：KR1019980017677A
公开(公告)日：1998-06-05
申请号：KR1019960037493
申请日：1996-08-31
IPC: A61K6/02
Abstract: 본 발명은 전도재 내관을 세라믹 시이트로부터 성형함으로써 현탁 성형법에 의해 제조되는 기존의 전도재 내관 성형공정을 단순화시키는 새로운 방법으로써, 본 발명에서는 알루미나 또는 알루미나/지르코니아 분말을 주성분으로 분산제, 결합제, 가소제, 용매 등을 첨가하여 슬러리로 제조한 다음 이를 0.1~1.0mm 두께의 세라믹 시이트로 시이트화하고 이를 50~110℃에서 15~150kgf/cm
2 의 압력으로 1차 치아 성형물을 제조하는 것임.-
公开(公告)号：KR100531743B1
公开(公告)日：2005-12-22
申请号：KR1020030036622
申请日：2003-06-07
Applicant: 한국과학기술연구원
IPC: C04B35/10
Abstract: 본 발명은 수계 세라믹 슬러리로부터 제조된 수계 세라믹 테이프를 사용하는 세라믹 분리막 (ceramic membrane)의 제조에 관한 것이다. 더욱 상세하게, 입자 크기가 다른 세라믹 원료 분말이 일련의 서로 다른 비율로 혼합되어 있는 이종 복합 분말, 물, 수계 결합제, 분산제 및 가소제를 포함하는 수계 세라믹 슬러리; 상기 일련의 다양한 비율로 혼합된 이종 복합 분말을 각각 포함하는 세라믹 슬러리를 이용하여 제조된 다양한 기공 특성 및 다중 입도 분포를 갖는 세라믹 테이프; 상기 다양한 기공특성을 갖는 세라믹 테이프를 기공 특성 순서대로 적층하여 얻어지는 점진적으로 변화하는 기공특성을 갖는 지지층을 포함하는 세라믹 분리막; 및 다양한 기공 특성을 갖는 하나 이상의 세라믹 테이프를 제조하고 이들을 기공 특성 순서대로 한 번에 적층하고 열처리하여 지지층을 제조하는 단계를 포함하는 세라믹 분리막 제조방법에 관한 것이다.
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公开(公告)号：KR1020040023039A
公开(公告)日：2004-03-18
申请号：KR1020020054655
申请日：2002-09-10
Applicant: 한국과학기술연구원
IPC: C04B35/634
CPC classification number: C04B35/63444 , C04B35/63416 , C04B35/63424 , C04B35/63488
Abstract: PURPOSE: A preparation method of ceramic slurry containing binders such as PVP for spray drying is provided. The granular particles obtained from the slurry are easily broken up in forming, thereby preventing the formation of defects in ceramic compacts. CONSTITUTION: The ceramic slurry is prepared by the following steps of: mixing solvent, 20-50vol.%(based on the solvent) of ceramic powder and 0.1-5wt.%(based on the ceramic powder) dispersant such as ammonium polyacrylate; adding 0.1-5wt.% (based on the ceramic powder) of binders; and adding 0.1-1wt.%(based on the ceramic powder) of plasticizer such as triethylene glycol(TEG), glycerine or glycol. The binders are polyvinyl pyrrolidone(PVP), a mixture of PVP and polyethylene oxide(PEO), or a mixture of PVP and polyvinyl alcohol(PVA), and the binders are added in a form of solution obtained by dissolving 5-25wt.% of PVP or 0.4-5wt.% of PEO in water.
Abstract translation: 目的：提供含有粘合剂如PVP的喷雾干燥的陶瓷浆料的制备方法。 从浆料获得的粒状颗粒在成型时容易分解，从而防止在陶瓷压块中形成缺陷。 构成：通过以下步骤制备陶瓷浆料：将20-50vol。％（基于溶剂）的陶瓷粉末和0.1-5wt％（基于陶瓷粉末）分散剂如聚丙烯酸铵混合; 加入0.1-5重量％（基于陶瓷粉末）的粘合剂; 并加入0.1-1重量％（基于陶瓷粉末）的增塑剂如三甘醇（TEG），甘油或二醇。 粘合剂是聚乙烯吡咯烷酮（PVP），PVP和聚环氧乙烷（PEO）的混合物，或PVP和聚乙烯醇（PVA）的混合物，并且粘合剂以通过将5-25重量％ 的PVP或0.4-5wt。％的PEO在水中。
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公开(公告)号：KR1020030079326A
公开(公告)日：2003-10-10
申请号：KR1020020018287
申请日：2002-04-03
Applicant: 한국과학기술연구원
IPC: C09J7/00
Abstract: PURPOSE: Water-based ceramic slurry is provided to prevent the harm to environment and human body, to improve the drying speed of a ceramic tape, and to perform the working process at a low viscosity. CONSTITUTION: The water-based ceramic slurry comprises a metal oxide, and 0.05 to 2.0 wt% of a dispersing agent, 10 to 50 wt% of water, 3 to 17 wt% of a plasticizer and 5 to 30 wt% of an acrylic binder, based on the weight of the metal oxide. In particular, the acrylic binder comprises 40 to 70 wt% of butyl acrylate, 10 to 20 wt% of methyl methacrylate, 10 to 40 wt% of 2-hydroxyethyl methacrylate and 2 to 10 wt% of methacrylic acid, and has a glass transition temperature of -20±5 deg.C and monomer content in emulsion of 60% or more. The ceramic tape can be produced by defoaming the ceramic slurry, forming it into a sheet and then drying.
Abstract translation: 目的：提供水性陶瓷浆料，以防止对环境和人体的伤害，提高陶瓷带的干燥速度，并以低粘度进行加工。 构成：水性陶瓷浆料含有金属氧化物，0.05〜2.0重量％的分散剂，10〜50重量％的水，3〜17重量％的增塑剂和5〜30重量％的丙烯酸类粘合剂 ，基于金属氧化物的重量。 特别地，丙烯酸类粘合剂包含40〜70重量％的丙烯酸丁酯，10〜20重量％的甲基丙烯酸甲酯，10〜40重量％的甲基丙烯酸2-羟乙酯和2〜10重量％的甲基丙烯酸，并且具有玻璃化转变 温度为-20±5℃，乳液中单体含量为60％以上。 陶瓷带可以通过使陶瓷浆料消泡，将其形成片材然后干燥而制成。
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