-
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。
-
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。
-
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℃。
-
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。
-
Patent Agency Ranking
公开(公告)号：KR1020000003023A
公开(公告)日：2000-01-15
申请号：KR1019980024100
申请日：1998-06-25
Applicant: 한국과학기술연구원
IPC: G01R33/00
Abstract: PURPOSE: A measuring apparatus and method of a hysteresis loop are described, which can correctly measure the ferroelectric hysteresis loop by using one period power. CONSTITUTION: The measuring apparatus comprises alternative signal generator generating an alternative signal having a period of several or decades of seconds, a signal processor processing an output signal of the generator to generate measuring voltage in which at least one section is direct voltage and other sections are alternative voltage, a measuring circuit of which power is an output of the processor, and a signal measurer plotting a dielectric hysteresis is loop of a test bar mounted in the circuit.
Abstract translation: 目的：描述一种磁滞回线的测量装置和方法，可以通过使用一个周期功率来正确测量铁电滞后回路。 构成：测量装置包括产生具有数十或几十秒的周期的替代信号的替代信号发生器，信号处理器处理发生器的输出信号以产生测量电压，其中至少一个部分是直流电压，而其它部分是 替代电压，其功率是处理器的输出的测量电路，以及绘制介电滞后的信号测量器是安装在电路中的测试条的环路。
-
-
公开(公告)号：KR1020070103642A
公开(公告)日：2007-10-24
申请号：KR1020060035496
申请日：2006-04-19
Applicant: 한국과학기술연구원
IPC: C04B35/453 , C03C8/14
CPC classification number: C03C3/093 , C03C8/00 , C04B35/495 , C04B2235/3232 , C04B2235/36 , H01G4/129
Abstract: A low temperature firing dielectric ceramic composition is provided to be capable of being fired at low temperature while maintaining dielectric characteristics such as a dielectric constant and a quality factor for forming a ceramic substrate. A low temperature firing dielectric ceramic composition contains (1) 50-80wt% of ZnNb2O6 dielectric ceramics, (2) 10-40wt% of TiO2 dielectric ceramics, and (3) 5-30wt% of SiO2-B2O3-Al2O3-CaO-ZnO-based glass frit of which a melting point ranges from 1400 to 1600 °C, wherein the firing temperature is kept in the range of 800-900 °C. The dielectric ceramic composition has a dielectric constant of 15-35, a quality factor of 3,000-16,000 GHz, and a temperature coefficient of resonant frequency of -100 to +100 ppm/°C.
Abstract translation: 提供低温焙烧电介质陶瓷组合物以能够在保持诸如介电常数和用于形成陶瓷基板的品质因素之类的介电特性的同时在低温下烧制。 低温焙烧电介质陶瓷组合物含有（1）50-80重量％的ZnNb 2 O 6电介质陶瓷，（2）10-40重量％的TiO 2电介质陶瓷，和（3）5-30重量％的SiO 2 -B 2 O 3 -Al 2 O 3 -FAO-ZnO 的玻璃料，其熔点范围为1400〜1600℃，其中烧成温度保持在800-900℃的范围内。 介电陶瓷组合物的介电常数为15-35，品质因数为3,000-16,000GHz，共振频率的温度系数为-100〜+100ppm /℃。
-
公开(公告)号：KR100553318B1
公开(公告)日：2006-02-20
申请号：KR1020030049836
申请日：2003-07-21
Applicant: 한국과학기술연구원
CPC classification number: C01G9/03 , B01J6/00 , B01J2219/00063 , B01J2219/00135 , B01J2219/00186 , B01J2219/182 , B01J2219/1923 , B01J2219/1943 , B82Y30/00 , C01P2004/64 , C23C14/0021 , C23C14/086 , C23C14/228 , C23C14/243 , Y10S977/755 , Y10S977/762 , Y10S977/811 , Y10S977/84 , Y10S977/855
Abstract: 본 발명은 산화아연(ZnO) 나노구조체의 제조방법 및 제조장치에 관한 것으로서, 더욱 상세하게는 산화아연 분말과 그라파이트(graphite)의 환원반응에 의해 생성되는 아연가스를 실리콘 기판상에 증착시켜 나노구조체를 제조하되, 반응관 내부의 온도 조절 및 캐리어 가스로서 유입되는 알곤(Ar)과 산소(O
2 )의 배합비 조절에 의해 다양한 나노구조체를 재현성 있게 제조하는 방법과 이의 제조장치에 관한 것이다.
산화아연, 나노쉬트, 나노선 어레이, 산소, 촉매-
公开(公告)号：KR1020050075863A
公开(公告)日：2005-07-22
申请号：KR1020040003535
申请日：2004-01-17
Applicant: 한국과학기술연구원
IPC: C04B35/00
Abstract: 본 발명은 저유전율 세라믹 후막과 중유전율 세라믹 후막이 다수 적층된 저온 동시소성용 복합 세라믹체에 관한 것으로서, 더욱 상세하게는 저유전율 세라믹 조성물과 중유전율 세라믹 조성물 중에 각각 함유되는 유리프리트의 조성계를 공통으로 선정함으로써 900 ℃를 전후한 넓은 소성 온도범위에서의 수축거동을 동일하게 매칭하여 이종(異種) 후막간에 휨이나 박리가 없도록 한 복합 세라믹체에 관한 것이다. 본 발명에 따른 복합 세라믹체 제조기술은 다기능성 세라믹 후막 적층 모듈을 구현하는데 효과적으로 이용될 수 있다.
-
-
-
-
-
-
-
-
-
Search Results
57
records
(took 0.019 seconds)
