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公开(公告)号：KR1019920008104B1
公开(公告)日：1992-09-22
申请号：KR1019900012586
申请日：1990-08-16
Applicant: 한국과학기술연구원
IPC: H01G4/12
CPC classification number: H01G4/1227 , C04B35/4684
Abstract: This dielectric ceramic contains 82.604-88.118 wt.% BaTiO3, 7.267- 8.715 wt.% CaSnO3, 0.130 wt.% MoO2, 0.500-4.002 wt.% PbTiO3, 0.510- 4.260 wt.% Bi2Ti2O7, 0.976-2.440 wt.% ZnO and 0.304-0.760 wt.% B2O3. This material is sintered at low temperature 1,130- 1,140 deg.C, while maintaining the high dielectric constant of barium titanate and low dielectric loss. CaSnO3 reduces curie temperature into room temperature, and PbTiO3, Bi2Ti2O7, ZnO and B2O3 systems are to be used as sintering agents.
Abstract translation: 该电介质陶瓷含有82.604-88.118重量百分比的BaTiO3，7.267-8.915重量％的CaSnO3，0.130重量％的MoO2，0.500-4.002重量％的PbTiO3，0.510-4.260重量％的Bi2Ti2O7,0.976-2.440重量％的ZnO和 0.304-0.760重量％B2O3。 该材料在低温1,130-140℃下烧结，同时保持钛酸钡的高介电常数和低介电损耗。 CaSnO3将居里温度降低到室温，PbTiO3，Bi2Ti2O7，ZnO和B2O3系统用作烧结剂。
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公开(公告)号：KR1019910010125B1
公开(公告)日：1991-12-17
申请号：KR1019890017865
申请日：1989-12-04
Applicant: 한국과학기술연구원
IPC: C01B33/26
Abstract: The mulite is prepared by preparing 5-20 wt.% bohemite sol and 5- 15 wt.% silica sol respectively, controling at PH 3-5, dispersing after having sufficient surface charge, precipitating to get the peptizing bohemite and silica respectively, treating 1-5 wt.% seeding material (e.g. α-Al2O3, TiO2,ZrO2) in the same ways, centrifugal-separating the seeding material to get small- size particles, adding 1-5 wt.% seeding material to the peptizing bohemite, mixing the mixed solution with silica sol at the ratio of 2 mol silica to 3 mol alumina to make amorphous alumina silicate sol, drying, and calcinating.
Abstract translation: 通过分别制备5-20重量％的挥发性溶胶和5-15重量％二氧化硅溶胶来制备多孔沸石，控制PH 3-5，在充分的表面电荷之后分散，分别沉淀以得到胶溶波希米石和二氧化硅，处理 以相同的方式将1-5重量％的播种材料（例如α-Al 2 O 3，TiO 2，ZrO 2）离心分离出种子材料以获得小尺寸颗粒，向胶溶波长体加入1-5重量％的播种材料， 将混合溶液与二氧化硅溶胶以2mol二氧化硅与3mol氧化铝的比例混合，制成无定形硅酸铝溶胶，干燥和煅烧。
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公开(公告)号：KR1020040034234A
公开(公告)日：2004-04-28
申请号：KR1020020064327
申请日：2002-10-21
Applicant: 한국과학기술연구원
IPC: H01Q13/08
Abstract: PURPOSE: A high gain microstrip antenna is provided to achieve improved gain and directivity of the antenna by arranging dielectrics having a high dielectric constant on the top of the antenna. CONSTITUTION: A high gain microstrip antenna comprises a first dielectric layer(340); a grounding surface(300) formed on the first dielectric layer, and which has a plurality of slots(320); a plurality of feeder lines(310) formed at the lower surface of the first dielectric layer and overlapped with the slots of the grounding surface; a first air layer(350) formed on the first dielectric layer; a plurality of patches(100) formed in the air layer such that the patches transmit electric waves through the feeder lines and the slots; a second dielectric layer(360) formed on the first air layer, and which has a dielectric constant higher than the dielectric constant of the first dielectric layer; a second air layer(330) formed at the lower surface of the first dielectric layer; a metal surface(370) formed at the lower surface of the second air layer; a plurality of T-junctions for distributing electric waves to the feeder lines; and a waveguide for transmitting electric waves to the T-junctions.
Abstract translation: 目的：提供高增益微带天线，以通过在天线的顶部布置具有高介电常数的电介质来实现改进的天线增益和方向性。 构成：高增益微带天线包括第一电介质层（340）; 形成在所述第一电介质层上的接地表面（300），并且具有多个槽（320）; 多个馈电线（310），形成在所述第一电介质层的下表面处并与所述接地表面的所述槽重叠; 形成在所述第一电介质层上的第一空气层（350） 形成在空气层中的多个贴片（100），使得贴片通过馈线和插槽传输电波; 形成在第一空气层上的第二电介质层（360），其介电常数高于第一介电层的介电常数; 形成在第一电介质层的下表面处的第二空气层（330） 形成在第二空气层的下表面处的金属表面（370） 用于将电波分配到馈线的多个T形接头; 以及用于将电波传输到T形接头的波导。
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公开(公告)号：KR100371056B1
公开(公告)日：2003-02-06
申请号：KR1020000059208
申请日：2000-10-09
Applicant: 한국과학기술연구원
IPC: H01C7/115
Abstract: PURPOSE: A method for manufacturing a varistor-capacitor multifunctional device is provided to simultaneously obtain varistor characteristic and capacitor characteristic of a dielectric index larger than 10000 and dielectric loss less than 5%. CONSTITUTION: A SrTiO3 SMD varistor-capacitor multifunctional device is manufactured by using Sr0.9Ca0.1TiO3 as basic material powder. The basic material powder is subjected to wet milling after Nb2O5 of 0.4-0.6 mol% is added and SiO2 of 0.1-0.3 mol% and MnO of 0.1-0.3 mol% are added. Organic vehicle is added to the basic material powder after wet milling to form slurry. The slurry is molded by a tape caster to form a ceramic sheet. After cutting the ceramic sheet, internal electrodes are printed on the ceramic sheet by Ag/Pd or Ni electrodes. Three to five ceramic sheets are deposited on and on and subjected to pre-sintering at 1100°C for 1 hour. The sintered ceramic is re-oxidized in a furnace with the air at 900-1100°C.
Abstract translation: 目的：提供一种制造压敏电阻 - 电容器多功能器件的方法，以同时获得介电指数大于10000且介电损耗小于5％的压敏电阻特性和电容特性。 构成：SrTiO3 SMD压敏电阻多功能器件是以Sr0.9Ca0.1TiO3为基本粉末制成的。 在加入0.4-0.6摩尔％的Nb 2 O 5并加入0.1-0.3摩尔％的SiO 2和0.1-0.3摩尔％的MnO后，将基础材料粉末进行湿磨。 在湿磨之后将有机载体添加到基础材料粉末中以形成浆料。 浆料通过带式连铸机成型以形成陶瓷片。 在切割陶瓷片之后，通过Ag / Pd或Ni电极将内部电极印刷在陶瓷片上。 三到五个陶瓷片沉积在其上和之上并在1100℃下进行预烧结1小时。 烧结的陶瓷在炉中用空气在900-1100℃下再氧化。
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Patent Agency Ranking
公开(公告)号：KR100370544B1
公开(公告)日：2003-01-29
申请号：KR1020000059209
申请日：2000-10-09
Applicant: 한국과학기술연구원
IPC: H01C7/10
Abstract: PURPOSE: A method for manufacturing a low voltage MELF(metal electrode face bonding device) type varistor-capacitor multifunctional device is provided to reduce cost, mount to a PCB without leads or packaging, and simultaneously obtain varistor characteristic and capacitor characteristic. CONSTITUTION: A low voltage MELF type varistor-capacitor multifunctional device is manufactured by using Sr0.9Ca0.1TiO3 as basic material powder. The basic material powder is subjected to wet milling for 24 hours after Nb2O5 of 0.4-0.6 mol% is added. The basic material powder is calcined at 1100°C for 2 hours after wet ball milling. After adding MnO of 0.2mol% and SiO2 of 0.2mol% to the calcined material, the calcined material is subjected to wet ball milling for 24 hours. Then, organic vehicle is mixed to form slurry. The slurry is molded as a pipe by a dice. The pipe is sintered in a reduction furnace for 4 hours. The sintered sample is re-oxidized in a furnace with the air at 800°C. On the re-oxidized sample, outer electrodes are formed by thermally processing Ag electrodes at 600°C for 10 minutes.
Abstract translation: 目的：提供一种制造低压MELF（金属电极面接合装置）型压敏电阻 - 电容器多功能装置的方法，以降低成本，无需引线或封装地安装到PCB上，同时获得压敏电阻特性和电容特性。 结构：低电压MELF型压敏电阻多功能器件采用Sr0.9Ca0.1TiO3作为基础材料粉末。 在加入0.4-0.6摩尔％的Nb 2 O 5后，将基础材料粉末进行湿磨24小时。 湿球磨后，将基础材料粉末在1100℃下煅烧2小时。 向煅烧材料中加入0.2mol％的MnO和0.2mol％的SiO2后，将煅烧材料进行湿式球磨24小时。 然后，将有机载体混合以形成浆液。 浆料通过骰子模制成管道。 该管在还原炉中烧结4小时。 烧结样品在空气中在800℃下在炉中再氧化。 在再氧化的样品上，通过在600℃对Ag电极进行10分钟的热处理来形成外电极。
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公开(公告)号：KR1020020087144A
公开(公告)日：2002-11-22
申请号：KR1020010026056
申请日：2001-05-14
Applicant: 한국과학기술연구원
CPC classification number: H01B3/12 , C04B35/04 , C04B35/46 , C04B35/6261 , C04B35/64 , C04B2111/00844 , H01G4/1227
Abstract: PURPOSE: A dielectric ceramic composition of the MgO-CaO-TiO2(MCT) system is provided for use as low temperature fired multilayer substrates requiring excellent microwave dielectric characteristics and low temperature firing(
Abstract translation: 目的：提供MgO-CaO-TiO2（MCT）系统的介电陶瓷组合物，用作需要优异的微波介电特性和低温烧制（<= 1100℃）的低温烧制多层基板。 构成：低温共烧陶瓷（LTCC）的介电陶瓷组合物的制造方法包括以下步骤： （i）球磨原料，MgO，CaO和TiO2，并煅烧1100℃。 （ii）添加2-10％（基于组合物的总量）的烧结助剂例如包含B 2 O 3和SiO 2的硼硅酸盐玻璃和至少一种选自BaO，ZnO和PbO的碱金属氧化物以降低烧制温度并获得良好的 电性能，其中助燃剂是含有摩尔比为30:60:10的BaO，B2O3和SiO2的氧化物; （iii）成型; （iv）在1050-1100℃烧制。 所得到的在1100℃下烧制的电介质陶瓷组合物具有以下微波特性：介电常数为20-21，Qf为9100-11000，接近零谐振系数的温度系数。
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公开(公告)号：KR100351711B1
公开(公告)日：2002-09-05
申请号：KR1020000048921
申请日：2000-08-23
Applicant: 한국과학기술연구원
IPC: H01G4/12
Abstract: 본 발명은 950
o C 부근의 낮은 온도 범위에서 소성이 가능한 고유전율의BaO-TiO
2 계 세라믹 조성물의 제조방법에 관한 것이다. 이 조성물은 세라믹 저온소성다층기판 내부에 사용되는 고유전율 층에 사용하기에 적합하다.
본 발명에 따르면, BaO-PbO-2Nd
2 O
3 -10TiO
2 계 소성분말에 대하여 Li
2 O, B
2 O
3 , SiO
2 , V
2 O
5 를 적량 첨가하였을 때 마이크로파 유전특성과 소결특성이 우수하였다. 따라서 본 발명의 방법에 따라 제조된 세라믹조성물은 가격이 비싼 Pt 전극이나 Pd 전극이 아닌, 가격이 저렴한 Ag 또는 Ag-Pd전극과 함께 저온소성다층기판의 제조에 사용될 수 있다.-
公开(公告)号：KR1020020022214A
公开(公告)日：2002-03-27
申请号：KR1020000054894
申请日：2000-09-19
Applicant: 한국과학기술연구원
CPC classification number: C04B35/46 , C04B35/48 , C04B2111/00844 , C04B2111/90 , C04B2235/3232 , C04B2235/3244 , H01B3/12 , H01G4/1218 , H01G4/1236
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：提供具有高介电常数（大于100）的PbO-ZrO2-CaO-TiO2系介电陶瓷组合物，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：微波介电陶瓷组合物由式（1-y）（Pb1-xCaxZr0.9Ti0.1）O3 + ySrZrO3（0.3 <= x <= 0.4,0.3 <= y <= 0.4）表示。 通过以下步骤获得组合物：制备PbZrO3-CaTiO3组合物; 以相应于配方的比例添加SrCO3，ZrO2，CeO2的摩尔分数为0.003〜0.005，降低烧结温度，提高品质因子; 球磨，干燥，烧结1300-1400℃。
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公开(公告)号：KR1020000050904A
公开(公告)日：2000-08-05
申请号：KR1019990001052
申请日：1999-01-15
Applicant: 한국과학기술연구원
IPC: C04B35/495
CPC classification number: H01G4/1254 , C04B35/495 , C04B35/64 , C04B2235/6562 , C04B2235/658
Abstract: PURPOSE: A process for producing a dielectric ceramics using Pb(Fe1/2Nb1/2)O3 having a relatively low sintering temperature is provided which reduces production cost by using inexpensive Ag or Ag-Pd as an inner electrode material. CONSTITUTION: A process comprises the steps of synthesizing FeNbOw by wet-mixing Fe2O3 and Bb2O5 in a molar ratio of 1 : 1, drying and sintering; compression-molding after wet-mixing FeNbO4 powder and PbO in a molar ratio of 1 : 2, drying and sintering; and sintering the molded Pb(Fe1/2Nb1/2)O3 at 900 to 950°C, wherein the sintering step carried out in an oxygen atmosphere of 0 to 1 atm.
Abstract translation: 目的：提供一种使用具有相对较低烧结温度的Pb（Fe1 / 2Nb1 / 2）O3制备电介质陶瓷的方法，其通过使用廉价的Ag或Ag-Pd作为内电极材料来降低生产成本。 构成：一种方法包括以1:1的摩尔比湿法混合Fe2O3和Bb2O5来合成FeNbOw，干燥和烧结; FeNbO4粉末和PbO以1:2的摩尔比湿式混合后进行压缩成型，干燥烧结; 并在900〜950℃烧结成型的Pb（Fe1 / 2Nb1 / 2）O3，其中烧结步骤在0〜1atm的氧气氛中进行。
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