KR19980020389A - Dielectric composition for high frequency large capacity ceramic capacitor - Google Patents
Dielectric composition for high frequency large capacity ceramic capacitor Download PDFInfo
- Publication number
- KR19980020389A KR19980020389A KR1019960038868A KR19960038868A KR19980020389A KR 19980020389 A KR19980020389 A KR 19980020389A KR 1019960038868 A KR1019960038868 A KR 1019960038868A KR 19960038868 A KR19960038868 A KR 19960038868A KR 19980020389 A KR19980020389 A KR 19980020389A
- Authority
- KR
- South Korea
- Prior art keywords
- dielectric
- composition
- ceramic capacitor
- high frequency
- dielectric composition
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 42
- 239000003985 ceramic capacitor Substances 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 15
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims abstract description 11
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 11
- 229910017493 Nd 2 O 3 Inorganic materials 0.000 claims abstract description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 9
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 8
- -1 B 2 O 3 Inorganic materials 0.000 claims abstract description 3
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 claims abstract description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 4
- 239000002003 electrode paste Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000001238 wet grinding Methods 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Inorganic materials [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
- H01G4/1218—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates
- H01G4/1227—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates based on alkaline earth titanates
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Inorganic Insulating Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
본 발명은 고주파 대용량 세라믹콘덴서용 유전체조성물에 관한 것으로 더 상세히 설명하면 CaTiO3재료를 주성분으로 하고 La2O3, Nd2O3, PbO, B2O3, SiO2, Al2O3, TiO2및 MgO 성분들을 포함하며, 각각의 성분들은 Wt%로 CaTiO3:60~68%, TiO2:7~12%, MgO:1~3%, La2O3:2~6%, Nd2O3:2~6%, PbO:1~3%, Al2O3:1~4%, SiO2:2~6%, B2O3:3~8%의 범위를 갖는 조성비율로 구성되어 있으며, 이들 성분의 합은 100wt%로서, 이것에 중량비로 ZrO21~5% 첨가한 것을 특징으로 한 고주파 대용량 세라믹콘덴서용 유전체 조성물에 관한 것이다.The present invention relates to a dielectric composition for a high frequency large-capacity ceramic capacitor. More specifically, the present invention relates to a CaTiO 3 material based on La 2 O 3 , Nd 2 O 3 , PbO, B 2 O 3 , SiO 2 , Al 2 O 3 , TiO. 2 and MgO components, each of which is Wt% CaTiO 3 : 60-68%, TiO 2 : 7-12%, MgO: 1-3%, La 2 O 3 : 2-6%, Nd 2 O 3 : 2 ~ 6%, PbO: 1 ~ 3%, Al 2 O 3 : 1 ~ 4%, SiO 2 : 2 ~ 6%, B 2 O 3 : 3 ~ 8% The sum of these components is 100 wt% and relates to a dielectric composition for a high frequency large capacity ceramic capacitor, wherein ZrO 2 is added in an amount of 1 to 5% by weight.
Description
고주파 대용량 세라믹콘덴서용 유전체조성물은 고주파영역(1kHz~500kHz)에서 충분한 정전용량을 만족시키기 위해서는 유전체조성물의 유전율이 10이상 되어야 하며 유전손실 및 재료의 절연파괴를 방지하기 위해서는 0.2% 이하의 손실계수를 갖어야 한다.Dielectric composition for high frequency large capacity ceramic capacitor should have dielectric constant of 10 or more to satisfy sufficient capacitance in high frequency range (1kHz ~ 500kHz), and loss factor of 0.2% or less to prevent dielectric loss and dielectric breakdown. Must have
세라믹콘덴서의 특성과 관련, 유전체조성물의 유전율을 크게 하면 정전용량은 증가될 수 있으나 유전손실 및 온도계수가 증가되고, 유전손실은 세라믹콘덴서에 발생되는 에너지손실과 고주파영역에서 절연파괴에 직접적인 영향을 미치기 때문에 유전손실이 작을수록 좋으므로 유전체조성물을 제조할 때는 이러한 점 등을 고려하여 유전체 재료를 선정할 필요가 있다.Regarding the characteristics of ceramic capacitors, increasing the dielectric constant of the dielectric composition can increase the capacitance, but the dielectric loss and temperature coefficient are increased, and the dielectric loss has a direct effect on the energy loss and dielectric breakdown in the high frequency region of the ceramic capacitor. Therefore, the smaller the dielectric loss, the better. Therefore, when manufacturing the dielectric composition, it is necessary to select a dielectric material in consideration of such a point.
현재 세라믹콘덴서 유전체 재료로는 BaTiO3및 산화티탄계 재료가 주원료로 많이 이용되고 있다. BaTiO3재료는 유전율의 높은 반면 유전율의 전계의존성 및 온도 의존성이 크고, 산화티탄계(TiO2, CaTiO3등) 재료는 유전율이 10~180의 범위로 온도에 따른 정전용량의 변화가 직선적으로 변화하는 특성이 있으므로 유전체로서 사용하기 위해서는 이러한 점을 고려하여 다른 성분들을 첨가, 특성을 보완할 필요가 있다.Currently, ceramic capacitor dielectric materials include BaTiO 3 and titanium oxide-based materials. BaTiO 3 materials have high dielectric constant, but have high electric field dependence and temperature dependence of dielectric constant, and titanium oxide based materials (TiO 2 , CaTiO 3, etc.) have a dielectric constant of 10 ~ 180 and change of capacitance with temperature linearly. In order to use it as a dielectric, it is necessary to add other components and supplement the characteristics in consideration of this point.
예를 들면, BaTiO3재료륵 기본조성으로 한 유전체조성물로는 BaTiO3-PbTiO2계, BaTiO3-La2O3계, BaTiO3-BaSnO4계 및 BaTiO3-Ba2Bl4Ti3O12계 등의 유전체조성물, 또는 BaTiO3재료를 기본 조성으로 하여 Ca, Pb, Sr, Mg, Ni, Ti, Zn, Pb, W 성분을 첨가한 유전체조성물이 개발되었다. TiO2재료를 기본조성으로 한 유전체조성물은 TiO2재료를 주성분으로 하고 SrO, Bi2O3, La2O3을 첨가한 유전체조성물이 개발되었다.For example, BaTiO 3 materials or dielectric compositions based on the basic composition include BaTiO 3 -PbTiO 2 , BaTiO 3 -La 2 O 3 , BaTiO 3 -BaSnO 4 , and BaTiO 3 -Ba 2 Bl 4 Ti 3 O 12 Dielectric compositions including Ca, Pb, Sr, Mg, Ni, Ti, Zn, Pb, and W components have been developed based on a dielectric composition such as a system or a BaTiO 3 material. A dielectric composition of the TiO 2 base material with a composition of the dielectric composition as the main component material and the addition of TiO 2 SrO, Bi 2 O 3, La 2 O 3 has been developed.
본 발명에서는 고주파 대용량 세라믹콘덴서용 유전체조성물로서 산화티탄계 재료인 CaTiO3를 주성분으로 이용하였는데 이러한 이유는 CaTiO3재료는 유전율이 180 정도로 BaTiO3재료에 비해서 낮기는 하지만 가장 중요한 손실계수가 0.3%로 매우 낮으며 온도에 따른 정전용량의 변화특성이 직선적이므로 다른 성분들을 첨가하여 전기적 특성을 개선하기가 용이하기 때문이다.In the present invention, it was used as a main component a titanium-containing material, CaTiO 3 oxide as the dielectric composition for high-frequency high-capacity ceramic capacitor The reason for this is CaTiO 3 material, so a dielectric constant of 180 as a low, but the most important loss factor is 0.3% relative to BaTiO 3 material This is because it is very low and the change of capacitance with temperature is linear, so it is easy to improve the electrical properties by adding other components.
본 발명에는 CaTiO3재료를 기본조성으로 하고, 유전손실 특성을 좋게 하기 위하여 La2O3, Nd2O3등을 첨가하고, 소결조제 및 특성개선을 위해 PbO, B2O3, SiO2, Al2O3, TiO2및 MgO 성분들을 첨가하여 각 성분들의 Wt% 합이 100이 되도록 하고, 이것에 절연파괴 특성개선을 위해 ZrO21~5wt% 첨가한 것을 특징으로 한 고주파 대용량 세라믹콘덴서용 유전체조성물에 관한 것이다.In the present invention, a CaTiO 3 material is used as a basic composition, and La 2 O 3 , Nd 2 O 3, and the like are added to improve dielectric loss characteristics, and PbO, B 2 O 3 , SiO 2 , Add Al 2 O 3 , TiO 2 and MgO components so that the sum of Wt% of each component is 100 and ZrO 2 1 ~ 5wt% is added to it to improve insulation breakdown characteristics. It relates to a dielectric composition.
본 발명의 조성범위에 대해서 설명하면 다음과 같다. TiO27wt% 미만에서는 전기적 특성 즉, 유전율, 온도계수 및 유전손실에 변화가 없었으며 TiO212wt% 이상으로 초과되어도 유전율 및 온도계수 등이 크게 변화되지 않았다. MgO 1wt% 미만에서도 전기적특성에 변화가 없었으며 MgO 3wt% 이상 초과되면 유전손실이 약간 증가된다. 희토류 산화물인 La2O3, Nd2O3의 경우에 있어서는 2wt% 미만에서는 유전손실에 변화가 없었으며 6wt% 이상 초과되면 유전손실이 증가되고 절연파괴 전압이 낮아진다. PbO 1wt% 미만에서는 소성시 다 증발되어 소결조제로서 역할을 하지 못해 소결상태가 악화되었으며 3wt% 이상 초과되면 전기적특성이 크게 악화된다. Al2O31wt% 미만에서는 전기적특성에 변화가 있었으며 4wt% 이상 초과되면 유전율은 감소되나 유전손실이 증가되고 절연파괴전압이 낮아졌다. SiO26wt% 이상 초과되면 유전율이 증가되고 절연파괴 전압이 낮아진다. B2O33wt% 미만에서는 유전손실 및 소결성에 별 영향을 주지 못했으며 8wt% 이상 초과되면 유전손실이 증가되고 절연파괴 전압이 크게 낮아진다. 이외에도 내전압 향상을 위해 ZrO2성분을 첨가한 경우 1wt% 미만에서는 절연파괴 전압의 형상에 효과가 없었으며 5wt% 이상 초과되어도 1~5wt% 내로 첨가된 경우에 비해서 절연파괴 전압에 큰 변화는 없었다.Referring to the composition range of the present invention. At less than 7 wt% of TiO 2 , the electrical properties such as dielectric constant, temperature coefficient, and dielectric loss did not change, and even when TiO 2 was exceeded 12 wt% or more, the dielectric constant and temperature coefficient did not change significantly. There was no change in electrical properties even below 1 wt% MgO, and dielectric loss slightly increased above 3 wt% MgO. In the case of rare earth oxides La 2 O 3 and Nd 2 O 3 , there is no change in dielectric loss at less than 2 wt%. If it is more than 6 wt%, dielectric loss is increased and dielectric breakdown voltage is lowered. If the PbO is less than 1wt%, the sintering state is deteriorated because it does not act as a sintering aid when it is evaporated. If Al 2 O 3 was less than 1wt%, the electrical characteristics were changed. If it was over 4wt%, the dielectric constant was decreased, but the dielectric loss was increased and the dielectric breakdown voltage was lowered. Exceeding 6wt% of SiO 2 increases the dielectric constant and lowers the dielectric breakdown voltage. Less than 3wt% of B 2 O 3 had little effect on dielectric loss and sinterability. If it is over 8wt%, dielectric loss is increased and dielectric breakdown voltage is significantly lowered. In addition, when the ZrO 2 component was added to improve the breakdown voltage, there was no effect on the shape of the dielectric breakdown voltage at less than 1wt%, and there was no significant change in the dielectric breakdown voltage when it was added within 1 ~ 5wt% even more than 5wt%.
상기 유전체조성물은 바인더와 용매를 가하여 습식분쇄법에 의해 슬러리로 만든 후 테이프성형법으로 쉬이트를 성형, 건조한 다음 그 위에 Ag/Pd 전극 페이스를 인쇄하고, 이것을 여러장 중첩시킨후 고온가압하여 적층화하였다. 이 적층시편은 적당한 크기로 절단하고 1150~1250℃로 소성하여 소결체를 만들고, 내부전극과 통전가능하도록 Ag 전극 페이스트를 형성, 소부한 후 적층 세라믹콘덴서를 제조하였다.The dielectric composition is made into a slurry by wet grinding method by adding a binder and a solvent, and then the sheet is formed and dried by a tape forming method, and then printed on Ag / Pd electrode face thereon, and several sheets are superimposed and laminated at high temperature. It was. The laminated specimens were cut to a suitable size and fired at 1150 to 1250 ° C. to form a sintered body, an Ag electrode paste was formed and baked so as to be energized with an internal electrode, and then a laminated ceramic capacitor was manufactured.
이와 같이 제조된 적층 세라믹콘덴서 시편들에 대해 물리적 및 전기적 특성을 측정하였으며 그 결과는 표 1과 같다. 이 결과, 세라믹콘덴서용 유전체조성물의 전기적특성값은 유전율이 74이고 유전손실이 0.1%로 매우 낮으며 700V의 교류내전압에서 절연파괴가 일어나지 않았으며 온도에 따른 정전용량의 변화율이 700ppm/℃으로 양호한 온도계수값을 나타내었다. 이 유전체조성물의 경우에 있어서 온도에 따른 정전용량의 변화는 제1도와 같다. 또한 상기 조성물에 있어서 고주파 대용량 세라믹콘덴서용으로 사용되기 위한 가장 중요한 특성중의 하나인 절연파괴 특성에 크게 영향을 미치는 ZrO2첨가량에 따른 영향을 조사하였다. ZrO2첨가량 1~5wt% 조성범위내에서 ZrO2첨가량 변화에 따른 유전율 및 손실계수값은 큰 변화가 없었으나 ZrO2가 첨가되지 않은 유전체조성물에 비해 100kHz, 700V 교류전압에 견디는 빈도수가 크게 증가하여 절연 파괴특성이 많이 개선되었다. 따라서 본 발명의 유전체조성물은 고주파영역에 있어서 고전압 대용량 세라믹콘덴서에 요구되는 특성을 만족시킬 수 있었다.Physical and electrical properties of the multilayer ceramic capacitor specimens thus manufactured were measured, and the results are shown in Table 1. As a result, the electrical characteristics of the ceramic composition dielectric composition had a dielectric constant of 74, a very low dielectric loss of 0.1%, no dielectric breakdown at 700V AC withstand voltage, and a good change rate of capacitance with temperature of 700ppm / ℃. The temperature coefficient value is shown. In the case of this dielectric composition, the change in capacitance with temperature is shown in FIG. In addition, the effect of the amount of ZrO 2 added significantly affects the dielectric breakdown property, which is one of the most important characteristics for the high frequency large-capacity ceramic capacitor in the composition. ZrO 2 addition amount 1 ~ 5wt% composition range the dielectric constant and loss factor value corresponding to the ZrO 2 addition amount varies within by the there was no significant change resistant to 100kHz, 700V AC voltage compared to the dielectric composition of ZrO 2 is not added the frequency greatly increased Dielectric breakdown characteristics have been greatly improved. Therefore, the dielectric composition of the present invention was able to satisfy the characteristics required for the high voltage large capacity ceramic capacitor in the high frequency region.
도 1:본 발명 조성물이 온도에 따른 정전용량 변화곡선1: The capacitance change curve of the composition according to the temperature
다음에는 실시예에 의해 본 발명의 유전체조성물에 대해 상세히 설명한다.Next, the dielectric composition of the present invention will be described in detail by way of examples.
고주파 고전압 세라믹콘덴서용 유전체조성물로서는 wt%로 CaTiO3재료를 기본조성으로 하여 65.8%, TiO211.7%, MgO 1.0%, La2O34.2%, Nd2O34.5%, PbO 2.3%, Al2O33.8%, SiO22.6%, B2O34.1%의 조성비율을 갖으며 각 성분의 합이 100wt%로서 이것에 중량비로 ZrO22.5%을 첨가하여 유전체조성물을 제조하였으며 이 조성물에 바인더와 용매를 가하여 습식분쇄법에 의해 슬러리로 만든후, 테이프성형법으로 200㎛ 두께의 쉬이트를 성형, 건조한 다음 그 위에 Ag/Pd 전극 페이스트를 인쇄하고, 이것을 복수매 중첩하고 고온가압하여 적층화시켰다. 이 적층시편은 40×20mm 크기로 절단하고 1200℃에서 1시간 소성하여 소결체로 만든후, 내부전극과 통전 가능하도록 외부전극인 Ag 전극 페이스트를 형성하고 600℃에서 10분 소부하여 적층 세라믹콘덴서를 제조하였다.As dielectric composition for high frequency high voltage ceramic capacitor, wt% of CaTiO 3 material is 65.8%, TiO 2 11.7%, MgO 1.0%, La 2 O 3 4.2%, Nd 2 O 3 4.5%, PbO 2.3%, Al It has a composition ratio of 3.8% 2 O 3 , 2.6% SiO 2 and 4.1% B 2 O 3. The sum of each component is 100wt% and ZrO 2 2.5% is added to the dielectric composition to prepare a dielectric composition. After adding a binder and a solvent to make a slurry by wet grinding method, a sheet having a thickness of 200 μm was formed and dried by tape molding, and then Ag / Pd electrode paste was printed thereon, and a plurality of sheets were superimposed and laminated at high temperature. I was. The laminated specimen was cut into 40 × 20 mm size, fired at 1200 ° C. for 1 hour to form a sintered body, and then formed Ag electrode paste, which is an external electrode, to be energized with the internal electrode, and baked at 600 ° C. for 10 minutes to manufacture a laminated ceramic capacitor. It was.
상기 조성으로 된 고주파 대용량 세라믹콘덴서용 유전체조성물에 대해 100kHz에서 전기적 특성을 측정한 결과는 표 2와 같다.The electrical properties of the dielectric composition for the high frequency large-capacity ceramic capacitor having the composition are measured at 100 kHz.
[표1]Table 1
소성온도에 따른 유전체조성물의 전기적 특성Electrical Properties of Dielectric Compositions According to Firing Temperature
[표2][Table 2]
유전체조성물의 전기적 특성Electrical Characteristics of Dielectric Compositions
본 발명은 고주파 대용량 세라믹콘덴서용 유전체조성물에 관한 것으로 더 상세히 설명하면 CaTiO3재료를 주성분으로 하고 La2O3, Nd2O3, PbO, B2O3, SiO2, Al2O3, TiO2및 MgO 성분들을 포함하며, 각각의 성분들은 wt%로 CaTiO3:60~68%, TiO2:7~12%, MgO:1~3%, La2O3:2~6%, Nd2O3:2~6%, PbO:1~3%, Al2O3:1~4%, SiO2:2~6%, B2O3:3~8%의 범위를 갖는 조성비율로 구성되어 있으며 이들 성분의 합은 100WT%로서, 이것에 중량비로 ZrO21~5% 첨가한 것을 특징으로 한 고주파 대용량 세라믹콘덴서용 유전체 조성물에 관한 것이다.The present invention relates to a dielectric composition for a high frequency large-capacity ceramic capacitor. More specifically, the present invention relates to a CaTiO 3 material based on La 2 O 3 , Nd 2 O 3 , PbO, B 2 O 3 , SiO 2 , Al 2 O 3 , TiO. 2 and MgO components, each component wt% CaTiO 3 : 60-68%, TiO 2 : 7-12%, MgO: 1-3%, La 2 O 3 : 2-6%, Nd 2 O 3 : 2 ~ 6%, PbO: 1 ~ 3%, Al 2 O 3 : 1 ~ 4%, SiO 2 : 2 ~ 6%, B 2 O 3 : 3 ~ 8% The sum of these components is 100 WT%, and relates to a dielectric composition for a high frequency large-capacity ceramic capacitor, wherein ZrO 2 is added in a weight ratio of 1 to 5%.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960038868A KR0161219B1 (en) | 1996-09-09 | 1996-09-09 | High frequency dielectric ceramic composition for ceramic condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960038868A KR0161219B1 (en) | 1996-09-09 | 1996-09-09 | High frequency dielectric ceramic composition for ceramic condenser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980020389A true KR19980020389A (en) | 1998-06-25 |
| KR0161219B1 KR0161219B1 (en) | 1998-11-16 |
Family
ID=19473099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960038868A KR0161219B1 (en) | 1996-09-09 | 1996-09-09 | High frequency dielectric ceramic composition for ceramic condenser |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0161219B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100297954B1 (en) * | 1998-10-10 | 2001-11-14 | 윤덕용 | High Frequency Dielectric Ceramic Composition |
| KR100310035B1 (en) * | 1999-01-15 | 2001-11-14 | 박호군 | Microwave dielectric ceramic composition for low temperature firing |
| KR100424988B1 (en) * | 2001-02-27 | 2004-03-27 | 주식회사 아모텍 | Dielectric Ceramic Compositions |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103288440A (en) * | 2012-02-29 | 2013-09-11 | 深圳光启创新技术有限公司 | Ceramic composite material and super material prepared from same |
| KR102010966B1 (en) | 2019-02-28 | 2019-10-21 | (주)에이스 | Air conditioner with thermoelectric cooling element |
-
1996
- 1996-09-09 KR KR1019960038868A patent/KR0161219B1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100297954B1 (en) * | 1998-10-10 | 2001-11-14 | 윤덕용 | High Frequency Dielectric Ceramic Composition |
| KR100310035B1 (en) * | 1999-01-15 | 2001-11-14 | 박호군 | Microwave dielectric ceramic composition for low temperature firing |
| KR100424988B1 (en) * | 2001-02-27 | 2004-03-27 | 주식회사 아모텍 | Dielectric Ceramic Compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| KR0161219B1 (en) | 1998-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3567759B2 (en) | Dielectric ceramic composition and multilayer ceramic capacitor | |
| KR100259321B1 (en) | Dielectric ceramic composition and monolitic ceramic capacitor using the same | |
| EP0605904B1 (en) | Nonreducible dielectric ceramic composition | |
| EP1767507B1 (en) | Dielectric ceramic composition and laminated ceramic capacitor | |
| KR100375719B1 (en) | Dielectric Ceramic Composition and Monolithic Ceramic Capacitor | |
| JPH0745337B2 (en) | Dielectric porcelain composition | |
| KR100192563B1 (en) | Monolithic ceramic capacitors | |
| GB2361916A (en) | Nonreducing dielectric ceramic and monolithic ceramic capacitors | |
| JP2000053466A (en) | Non-reducible dielectric porcelain composition and laminated ceramic capacitor using the same | |
| EP0737655B1 (en) | Non-reduced dielectric ceramic compositions | |
| JP3987692B2 (en) | Dielectric porcelain composition and porcelain capacitor | |
| JP3987693B2 (en) | Dielectric porcelain composition and porcelain capacitor | |
| KR0161219B1 (en) | High frequency dielectric ceramic composition for ceramic condenser | |
| JP3634930B2 (en) | Dielectric porcelain composition | |
| JPS6120084B2 (en) | ||
| JP2869900B2 (en) | Non-reducing dielectric porcelain composition | |
| JP2001089234A (en) | Dielectric ceramic composition and multilayer ceramic parts | |
| JPH0676627A (en) | Dielectric ceramic composition | |
| JP2789110B2 (en) | High dielectric constant porcelain composition | |
| KR0145121B1 (en) | Dielectric ceramic compositions | |
| KR101559036B1 (en) | Dielectric ceramic and single-plate capacitor | |
| JP3797057B2 (en) | Method for producing dielectric ceramic composition | |
| JP2958826B2 (en) | Dielectric porcelain composition | |
| JP3106371B2 (en) | Dielectric porcelain composition | |
| KR940008692B1 (en) | Dielectric magnetic composite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20050721 Year of fee payment: 8 |
|
| LAPS | Lapse due to unpaid annual fee |