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公开(公告)号：KR100522134B1
公开(公告)日：2005-10-18
申请号：KR1020030020799
申请日：2003-04-02
Applicant: 한국과학기술연구원
IPC: C04B35/468
CPC classification number: C04B35/468 , B32B2311/08 , C04B35/4686 , C04B35/4688 , C04B35/472 , C04B2235/3215 , C04B2235/3224 , C04B2235/3296 , C04B2235/3298 , C04B2235/365 , C04B2235/656 , C04B2235/77 , C04B2235/79 , C04B2237/346 , C04B2237/408 , H01P1/203
Abstract: 본 발명은 900℃ 이하의 온도에서 소성이 가능한 유전체 조성물에 관한 것이다. 특히 유전율이 25∼35 범위에 있고 품질계수(Q×f)가 6,000∼20,000 GHz 범위인 것을 특징으로 한다. 조성물의 구성은 3∼16wt%의 K
2 O-Na
2 O-Li
2 OB
2 O
3 -SiO
2 계 유리 프리트와 84∼97wt%의 BaO-TiO
2 계 유전체 세라믹스로 구성된다. 본 발명을 통해 개발된 조성물은 필터 및 안테나 등 공진기 형태로서 세라믹 다층 패키징의 일부를 구성하는데 효과적으로 적용될 수 있다.-
公开(公告)号：KR1020040013943A
公开(公告)日：2004-02-14
申请号：KR1020020047094
申请日：2002-08-09
Applicant: 한국과학기술연구원
IPC: G01N25/16
CPC classification number: G01N25/16
Abstract: PURPOSE: A thermomechanical analyzer is provided to precisely measure thermal expansion of a test sample by applying constant pressure to the test sample. CONSTITUTION: A thermomechanical analyzer includes a heating device(10) for heating a test sample(20), and a core(34). The core(34) makes contact with the test sample(20) in such a manner that the core(34) axially moves according to expansion and compression of the test sample(20). A linear variable difference transformer(30) is provided to detect an expansion or compression degree of the test sample(20) according to the axial displacement of the core(34). A supporting mount(50) is provided to support the heating device and the linear variable difference transformer(30). A pressure applying device(100) is installed on the core(34) so as to apply constant pressure to the test sample(20).
Abstract translation: 目的：提供热机械分析仪，通过对测试样品施加恒定压力来精确测量测试样品的热膨胀。 构成：热机械分析仪包括用于加热测试样品（20）的加热装置（10）和芯部（34）。 核心（34）以测试样品（20）的膨胀和压缩方式轴向移动的方式与测试样品（20）接触。 提供线性可变差分变换器（30），以根据芯部（34）的轴向位移来检测测试样品（20）的膨胀或压缩程度。 提供支撑座（50）以支撑加热装置和线性可变差变压器（30）。 压力施加装置（100）安装在芯部（34）上，以对试样（20）施加恒定的压力。
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Patent Agency Ranking
公开(公告)号：KR1020030094774A
公开(公告)日：2003-12-18
申请号：KR1020020032062
申请日：2002-06-07
Applicant: 한국과학기술연구원
CPC classification number: C03C8/14 , C03C14/004 , H01B3/12 , C04B35/14 , C04B2111/00844
Abstract: PURPOSE: Provided is a borosilicate based ceramic composition having excellent microwave dielectric property, which is fired at a low temperature of about 950 deg.C and is used in a low temperature co-fired ceramic(LTCC) multi-layer substrate. CONSTITUTION: The low temperature co-fired dielectric ceramic composition comprises 40-60 wt% of an amorphous borosilicate glass and 40-60 wt% of a filler. The dielectric ceramic composition is characterized in that the borosilicate glass is based on SiO2 and B2O3 and contains one or more alkali oxides selected from the group consisting of Na2O, MgO, Li2O and Al2O3 as a firing aid; and the filler is one or more materials selected from the group consisting of alumina, quartz and melt silica. Further, a low temperature co-fired dielectric ceramics are produced by pulverizing the ceramic composition to obtain finely ground powder, forming the powder and firing the formed product at 800-950 deg.C for 2 hours.
Abstract translation: 目的：提供一种具有优异的微波介电性能的硼硅酸盐陶瓷组合物，其在约950℃的低温下烧制并用于低温共烧陶瓷（LTCC）多层基材中。 构成：低温共烧介电陶瓷组合物包含40-60重量％的无定形硼硅酸盐玻璃和40-60重量％的填料。 介电陶瓷组合物的特征在于，硼硅酸盐玻璃基于SiO 2和B 2 O 3，并且含有一种或多种选自Na2O，MgO，Li2O和Al2O3作为烧成助剂的碱金属氧化物; 并且填料是选自氧化铝，石英和熔融二氧化硅的一种或多种材料。 此外，通过将陶瓷组合物粉碎以获得精细研磨的粉末，形成粉末并在800-950℃下煅烧所形成的产物2小时来制备低温共烧介电陶瓷。
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公开(公告)号：KR1020030061521A
公开(公告)日：2003-07-22
申请号：KR1020020002050
申请日：2002-01-14
Applicant: 한국과학기술연구원
CPC classification number: C04B35/46 , C03C3/064 , C04B35/03 , C04B35/04 , C04B35/6261 , C04B35/64 , C04B2111/00844 , C04B2111/90 , H01B3/12
Abstract: PURPOSE: A dielectric ceramic composition and its preparation method are provided, wherein the composition can be calcined at a low temperature of 950 deg.C and has a high dielectric constant. CONSTITUTION: The dielectric ceramic composition is an MgO-CaO-TiO2-based dielectric ceramic composition comprising 10-20 wt% of a borosilicate-based glass oxide and an alkali metal oxide. Preferably the borosilicate-based glass oxide is a mixture of SiO2 and B2O3 in the ratio of 6:4 to 7:3 by weight; and the alkali metal oxide is a mixture of Na2O, MgO and Li2O. The method comprises the steps of weighing MgTiO3 and CaTiO3 powder, ball milling the weighed one and calcining the milled one to prepare a dielectric calcined powder with the composition of MgO-CaO-TiO2; adding the borosilicate-based glass oxide and the alkali metal oxide to the dielectric calcined powder and pulverizing and mixing the mixture to prepare a mixture powder; molding the mixture powder; and sintering the molded one at a temperature of 900-950 deg.C.
Abstract translation: 目的：提供一种电介质陶瓷组合物及其制备方法，其中组合物可在950℃的低温下煅烧并具有高介电常数。 构成：介电陶瓷组合物是包含10-20重量％的硼硅酸盐基玻璃氧化物和碱金属氧化物的MgO-CaO-TiO 2基介电陶瓷组合物。 优选地，硼硅酸盐基玻璃氧化物是SiO 2和B 2 O 3的重量比为6:4至7:3的混合物; 碱金属氧化物是Na2O，MgO和Li2O的混合物。 该方法包括以下步骤：称量MgTiO3和CaTiO3粉末，对称重的粉末进行球磨，煅烧研磨的粉末，制备具有MgO-CaO-TiO2组成的介电煅烧粉末; 将硼硅酸盐基玻璃氧化物和碱金属氧化物加入到介电煅烧粉末中，粉碎和混合该混合物以制备混合物粉末; 成型混合粉末; 并在900-950℃的温度下烧结成型的。
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公开(公告)号：KR100390446B1
公开(公告)日：2003-07-04
申请号：KR1020000054894
申请日：2000-09-19
Applicant: 한국과학기술연구원
Abstract: PURPOSE: Provided is a PbO-ZrO2-CaO-TiO2 system dielectric ceramic composition with high dielectric constant(more than 100) for microwave products of small size and light weight such as filters, duplexer and resonators. CONSTITUTION: The microwave dielectric ceramic composition is represented by the formula, (1-y)(Pb1-xCaxZr0.9Ti0.1)O3 + ySrZrO3 (0.3
Abstract translation: 目的：提供一种具有高介电常数（超过100）的PbO-ZrO2-CaO-TiO2系统介电陶瓷组合物，用于小尺寸和重量轻的微波产品，如滤波器，双工器和谐振器。 构成：微波介质陶瓷组合物由式（1-y）（Pb1-xCaxZr0.9Ti0.1）O3 + ySrZrO3（0.3≤x≤0.4,0.3≤y≤0.4）表示。 该组合物通过以下步骤获得：制备PbZrO3-CaTiO3组合物; 以相应于配方的比例加入SrCO 3，ZrO 2和摩尔分数为0.003-0.005的CeO 2以降低烧结温度并改善品质因数; 球磨，干燥，并在1300-1400℃下烧结。
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公开(公告)号：KR1020020027123A
公开(公告)日：2002-04-13
申请号：KR1020000059080
申请日：2000-10-07
Applicant: 한국과학기술연구원
IPC: C04B35/634 , C04B35/01 , H01G4/12
CPC classification number: C04B35/634 , C04B35/453 , C04B35/6261 , C04B2111/90 , H01B3/12 , H01G4/12 , H01G4/30
Abstract: PURPOSE: Provided is a preparation method of relaxer ferroelectric ceramic thick films for multi-layer ceramic capacitors by spreading ferroelectric ceramic powder on a high molecular matrix homogeneously without sintering. CONSTITUTION: The preparation method comprises the steps of: grinding Pb-based relaxer ferroelectric ceramics, Pb(B'2+1/3 B''5+2/3)O3 system or Pb(B'3+1/2 B''5+1/2)O3 system, where B'2+ is one of Mg2+, Ni2+, Zn2+ and Cd2+, B''5+ is one of Nb5+ and Ta5+, and B'3+ is one of Fe3+, Sc3+ and In3+; melting a high molecular material, polypropylene less than 10000 in molecular weight, at 180-220deg.C; adding relaxer ferroelectric ceramic powder to melted high molecular material, and mixing in a rate of 20-40rpm for 20-40min for a homogeneous mixture; forming a thick film by spin-coating or extruding the mixture on a substrate, Cu-substrate, where the dropping amounts of the mixture are 30-60drops in a rate of 1-3drops/min, and the substrate is rotated in a rate of 300-500rpm, in the spin coating. The resultant ferroelectric thick films for multi-layer ceramic capacitors prepared without sintering have 1.32-2.90micrometer of thickness and 78-1905 of dielectric constant(at 25deg.C).
Abstract translation: 目的：提供一种用于多层陶瓷电容器的松弛铁电陶瓷厚膜的制备方法，通过在高分子量基体上均匀地铺展铁电陶瓷粉末而不烧结。 制备方法包括以下步骤：研磨Pb基松弛剂铁电陶瓷，Pb（B'2 + 1 / 3B''5 + 2/3）O3体系或Pb（B'3 + 1/2 B' '5 + 1/2）O3体系，其中B'2 +是Mg2 +，Ni2 +，Zn2 +和Cd2 +之一，B''5 +是Nb5 +和Ta5 +之一，B'3 +是Fe3 +，Sc3 +和 IN3 +; 熔化高分子材料，分子量小于10000的聚丙烯，180-220℃; 将松弛铁电陶瓷粉末加入到熔融的高分子材料中，并以20-40rpm的速率混合20-40分钟，得到均匀的混合物; 通过将基板上的混合物旋涂或挤出来形成厚膜，其中以1-3滴/分钟的速率将混合物的滴加量为30-60滴，并将基板以 300-500rpm，在旋涂中。 所制备的用于不烧结的多层陶瓷电容器的铁电厚膜的厚度为1.32-2.90微米，介电常数为78-1905（25℃）。
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公开(公告)号：KR1020000050906A
公开(公告)日：2000-08-05
申请号：KR1019990001054
申请日：1999-01-15
Applicant: 한국과학기술연구원
IPC: C04B35/465
CPC classification number: H01B3/12 , C04B35/465 , C04B2235/3267 , C04B2235/3409
Abstract: PURPOSE: A low temperature sintering microwave dielectric composition prepared by mixing a proper sintering additive is provided which can be sintered at a temperature of about 1200°C. CONSTITUTION: A composition comprises (Mg0.93Ca0.07)TiO3, 0.2 to 0.4% by weight of B2O3 and 0.4 to 1.2% by weight of MnO2 as an additive. In this way, baking can be performed at a low temperature, and further an excellent microwave characteristic can be obtained even by baking at a low temperature. In a (Mg0.93Ca0.07)TiO3 microwave dielectric composition, it is possible to sinter at a relatively low temperature and maintain excellent microwave dielectric characteristics by using B2O3 and MnO2.
Abstract translation: 目的：提供通过混合适当的烧结添加剂制备的低温烧结微波电介质组合物，其可以在约1200℃的温度下烧结。 构成：组合物包含（Mg 0.93 Ca 0.08 O）TiO 3，0.2〜0.4重量％的B 2 O 3和0.4〜1.2重量％的作为添加剂的MnO 2。 以这种方式，可以在低温下进行烘烤，即使在低温下进行烘烤也能获得良好的微波特性。 在（Mg0.93Ca0.07）TiO3微波电介质组合物中，可以在较低温度下烧结，并通过使用B2O3和MnO2保持优异的微波介电特性。
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