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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:KR1020020039579A
公开(公告)日:2002-05-27
申请号:KR1020000069529
申请日:2000-11-22
Applicant: 한국과학기술연구원
IPC: G11B5/127
Abstract: PURPOSE: A junction glass for fixing a magnetic head is provided to have a thermal expansion coefficient similar to ferrite, to have a junction temperature lower than a softening point of a gap junction glass, and to prevent the generation of recrystallization upon heat treatment. CONSTITUTION: Two ferrite cores are coupled with a gap junction glass, to form a magnetic head core(1). The magnetic head core is inserted in a core inserting groove of a slider(3). A junction glass(4) for fixing the magnetic head has a heat treatment temperature lower than a softening point of the gap junction glass, and is loaded on the magnetic head core. The junction glass for fixing the magnetic head is fused and injected to a gap of the core inserting groove, to couple the magnetic head core to the core inserting groove. The junction glass for fixing the magnetic head consists of, in percentage, PbO 60-80%, SiO2 5-20%, B2 O3 2-10%. Al2 O3 0-5%, ZnO 0-5%, Fe2 O3 0-5%, CuO 0-5%, TeO2 2-15%, and Bi2 O3 2-15%.
Abstract translation: 目的:提供一种用于固定磁头的接合玻璃以具有与铁素体相似的热膨胀系数,以使结温低于间隙接合玻璃的软化点,并且防止在热处理时产生再结晶。 构成:两个铁氧体磁芯与间隙接合玻璃耦合,形成一个磁头磁芯(1)。 磁头芯插入滑块(3)的芯插入槽中。 用于固定磁头的接合玻璃(4)的热处理温度低于间隙接合玻璃的软化点,并被装载在磁头芯上。 用于固定磁头的接合玻璃被熔化并注入到芯插入槽的间隙中,以将磁头芯连接到芯插入槽。 用于固定磁头的接合玻璃由PbO 60-80%,SiO 2 5-20%,B 2 O 3 2-10%的百分比组成。 Al 2 O 3 0-5%,ZnO 0-5%,Fe 2 O 3 0-5%,CuO 0-5%,TeO 2-15%,Bi 2 O 3 2-15%。
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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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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。
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公开(公告)号:KR100225881B1
公开(公告)日:1999-10-15
申请号:KR1019970008514
申请日:1997-03-13
Applicant: 한국과학기술연구원
IPC: H01G4/12
Abstract: 본 발명은 1050~1150℃의 비교적 낮은 온도에서 소결되고, 소결조제 없이도 치밀한 미세구조와 우수한 유전특성을 가지며, 다양한 온도 보상 범위를 갖고, 비교적 값싼 금속 산화물 원료만을 구성된 조성을 갖는 온도 보상용 마이크로파 유전체를 제공하기 위하여, 산화아연 및 산화티탄이 화학양론적으로 조합되는 ZnTiO
3 중의 Zn이 Zn양 1에 대하여 0.175 내지 0.25의 양으로 Mg와, Zn 양 1에 대하여 0 보다 크고 0.15 이하의 양으로 Ni, Cu, Ba, Sr 및 그들의 조합으로 구성되는 군으로부터 선택되는 어느 하나로 치환되는 고주파용 유전체 세라믹 조성물을 제공한다.-
公开(公告)号:KR102235871B1
公开(公告)日:2021-04-05
申请号:KR1020190121844
申请日:2019-10-01
Applicant: 한국과학기술연구원
Abstract: 본발명은플라즈모닉금속박패를이용한자개공예품의제조방법및 이에의해제조된자개공예품이제공된다. 본발명의플라즈모닉금속박패를이용한자개공예품의제조방법은, (a) 플라즈모닉금속박패를레이저를이용하여제1 형상으로가공하는단계; (b) 한쪽표면에제2 형상의음각홈을가진기재층을형성하는단계; (c) 상기제1 형상의플라즈모닉금속박패를상기기재층의홈에삽입및 부착하는단계; (d) 상기제1 형상의플라즈모닉금속박패및 상기기재층의표면상에클리어코팅층을형성하는단계를포함하는것을특징으로한다.
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