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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：KR100319059B1
公开(公告)日：2002-01-09
申请号：KR1019990002445
申请日：1999-01-26
Applicant: 한국과학기술연구원
IPC: H01L29/92
Abstract: 본발명은저전압바리스터-커패시터복합소자제조방법에관한것으로, 종래 SrTiO바리스터는비직선계수가작고, 항복전압이크기때문에이용범위에제한이많아상용화가용이하지않은문제점이있었다. 이와같은문제점을감안한본 발명은 SrTiO시편을제조하는단계와; 상기 SrTiO에 900℃의온도에서 BiO를확산시키는단계와; 상기 BiO가확산된 SrTiO시편의양측면에은전극을형성하는단계로구성되어 SrTiO의입계에 BiO를확산시켜, 저전압에서동작하며, 항복전압이낮고비선형계수를증가시킨저전압바리스터-커패시터복합소자를형성할수 있게되어, 그적용범위를확대시켜 SrTiO바리스터-커패시터를상용화할 수있는효과가있다.
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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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Patent Agency Ranking
公开(公告)号：KR1019970008754B1
公开(公告)日：1997-05-28
申请号：KR1019940036443
申请日：1994-12-23
Applicant: 한국과학기술연구원
IPC: C04B35/472 , C04B35/493
CPC classification number: H01G4/1254 , C04B35/499 , H01B3/12 , Y10T29/435
Abstract: The present invention is about dielectrics magnetic composite with low agglomeration, high-dielectric constant and antireducibility and multilayer ceramic capacitor which use copper as internal electrode by using said composite.The present invention comprise a process of manufacturing slurry to tapetasting fine powder of said dielectics magnetic composite; a process of printing pattern of copper internal electrode by making said slurry to sheet; a process of manufacturing chip by cutting after drying, printed sheet, laminating and compacting; a process of presintering by removing organic binder of preagglomeration; a process of abrasion edge of said preagglomeration chip; a process of forming copper external electrode in presintering chip abraded edge; a process of agglomeration by loading said chip in reducing atmosphere; a process of reoxidation treatment in cooling process of said burning process.
Abstract translation: 本发明涉及使用所述复合材料使用铜作为内部电极的具有低聚集性，高介电常数和抗老化性的电介质磁性复合材料和多层陶瓷电容器。本发明包括一种制备浆料以将所述介电磁体的细粉末 综合; 通过将所述浆料制成片材来形成铜内部电极的印刷图案的工序; 通过干燥后的切割制造芯片的过程，印刷板，层压和压实; 通过去除预聚集的有机粘合剂预先烧结的过程; 所述预聚集芯片的磨损边缘的过程; 在预烧芯片磨损边缘上形成铜外电极的工艺; 通过将所述芯片加载到还原气氛中的附聚过程; 在所述燃烧过程的冷却过程中再氧化处理的过程。
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公开(公告)号：KR1019970005884B1
公开(公告)日：1997-04-21
申请号：KR1019940024328
申请日：1994-09-27
Applicant: 한국과학기술연구원
IPC: C04B35/462
Abstract: Title composition, where the quantity of added elements can be controlled accurately and the dielectric constant of it exhibits over 40, consists of Zn1-xSnxTiO4 and yTiO2, where x is 0.1-0.4 mol% and y is 0-0.1 mol%, wherein NiCl2, ZnCl2 and Mn(NO3)2= H2O are added to the fundamental composition as the ratio of NiO is less than 1wt.%, ZnO is less than 1wt.%, Ta2O5 is less than 5wt.%, and MnO is less than 1wt.% according to the weight ratio of its oxide, respectively.
Abstract translation: 标题组合物，其中可以精确控制添加元素的量并且其介电常数超过40，由Zn1-xSnxTiO4和yTiO2组成，其中x为0.1-0.4摩尔％，y为0-0.1摩尔％，其中NiCl 2 ，ZnCl 2和Mn（NO 3）2 = H 2 O加入到基础组成中，NiO的比例小于1wt。％，ZnO小于1wt。％，Ta2O5小于5wt。％，MnO小于1wt 根据其氧化物的重量比分别为％。
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公开(公告)号：KR1019960012728B1
公开(公告)日：1996-09-24
申请号：KR1019940008359
申请日：1994-04-20
Applicant: 한국과학기술연구원
IPC: C04B35/71
Abstract: The microwave dielectric ceramic composition contains MgTiO3 as a main component and 3-30 mole % of MgO to 1 mole of the MgTiO3. This composition may be prepared by mixing 1 mole MgTiO3, 3-30 mole % MgO, and 0.01-5 mole % CaO, sintering at the high temperature of 1400 deg.C or more, whereby it can reduce dielectric loss at the range of microwave.
Abstract translation: 微波介电陶瓷组合物含有MgTiO 3作为主要成分，并且含有3-30摩尔％的MgO至1摩尔的MgTiO 3。 该组合物可以通过混合1摩尔MgTiO 3，3-30摩尔％MgO和0.01-5摩尔％CaO，在1400℃或更高的高温下烧结，从而可以减少微波范围内的介电损耗 。
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公开(公告)号：KR1019960011352B1
公开(公告)日：1996-08-22
申请号：KR1019930028525
申请日：1993-12-18
Applicant: 한국과학기술연구원
Abstract: The process includes (a)calcining a mixture of MgO and Nb2O5 primarily at 1,000 deg.C; (b)crushing the calcined powder; (c)producing MgNb2O6 by calcining crushed material secondarily in the temperature range of 1,200 deg.C to 1,500 deg.C and (d)calcining a mixture of said MgNb2O6 and PbO in the temperature range of 800 to 900 deg.C. The process is characterized by inhibiting the formation of secondary phase, which causes the dielectric constant of capacitor to decrease.
Abstract translation: 该方法包括（a）主要在1000℃煅烧MgO和Nb2O5的混合物; （b）粉碎煅烧粉末; （c）通过在1200℃〜1500℃的温度范围内二次煅烧粉碎材料制备MgNb 2 O 6，（d）在800-900℃的温度范围内煅烧所述MgNb 2 O 6和PbO的混合物。 该过程的特征在于抑制二次相的形成，这导致电容器的介电常数降低。
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公开(公告)号：KR1019960010586A
公开(公告)日：1996-04-20
申请号：KR1019940024328
申请日：1994-09-27
Applicant: 한국과학기술연구원
IPC: C04B35/462
Abstract: 본 발명은 고주파 유전체 자기조성물 및 그 제조방법에 관한 것으로, 종래의 자기조성물은 유전율(k)이 40미만의 값을 가지며, 첨가물을 산화물 형태로 첨가하기 때문에, 미량 첨가시 정확한 공정제어에 어려움이 많은 문제점이 있었다.
이에 본 발명에 의한 고주파 유전체 자기 조성물은 Zn
1-X Sn
x Tio
4 ＋YTiO
2 의 유전체 자기조성물을 주성분으로 하며, 이때 상기 X, Y는 몰(mol)비로서 0.1＜X＜0.4, 0＜Y＜0.1를 가지도록 하는 것이며, 첨가원소는 물에 녹는 염화니켈(NiCl
2 ) 염화아연(ZnCl), 질산망간(Mn(NO
3 )
2- 4H
2 O)형태로 첨가하였다.
또한 이와같은 고주파 유전체 자기조성물을 산화지르코늄(ZrO
2 ), 산화 주석(SnO
2 ), 산화티탄(TiO
2 )으로 구성된 주조성물에 첨가원소로 수용성의 염화니켈(NiCl
2 ), 염화아연(ZnCl), 질산망간(Mn(NO
3 )
2- 4H
2 O)을 첨가하여 혼합후, 1000℃ 내지 1200℃에서 하소 하고, 다시 분쇄하여 성형한 다음 1200℃ 내지 1400℃의 온도의 산소 분위기에서 소성하는 순서로 진행되는 제조방법에 의해 제조함을 특징으로 하고 있다.
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