KR0145121B1 - Dielectric ceramic compositions - Google Patents
Dielectric ceramic compositionsInfo
- Publication number
- KR0145121B1 KR0145121B1 KR1019950052732A KR19950052732A KR0145121B1 KR 0145121 B1 KR0145121 B1 KR 0145121B1 KR 1019950052732 A KR1019950052732 A KR 1019950052732A KR 19950052732 A KR19950052732 A KR 19950052732A KR 0145121 B1 KR0145121 B1 KR 0145121B1
- Authority
- KR
- South Korea
- Prior art keywords
- dielectric
- dielectric constant
- multilayer ceramic
- composition
- ceramic capacitor
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 21
- 239000000919 ceramic Substances 0.000 title claims abstract description 14
- 239000003985 ceramic capacitor Substances 0.000 abstract description 12
- 238000009413 insulation Methods 0.000 abstract description 10
- 230000015556 catabolic process Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000010485 coping Effects 0.000 abstract 1
- 239000003989 dielectric material Substances 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof
- C04B2235/3255—Niobates or tantalates, e.g. silver niobate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
- C04B2235/3267—MnO2
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3279—Nickel oxides, nickalates, or oxide-forming salts thereof
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)
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
- Ceramic Capacitors (AREA)
Abstract
본 발명은 미국 EIA에서 정한 X7R 규격특성를 만족시키는 동시에 높은 유전율을 가지며, 절연 저항과 절연 파괴 전압이 높은 적층 세라믹 콘덴서 제조용 유전체 조성물에 관한 것이다.The present invention relates to a dielectric composition for manufacturing a multilayer ceramic capacitor that satisfies the X7R standard characteristics defined by the US EIA and has a high dielectric constant, and has high insulation resistance and high breakdown voltage.
최근의 제품의 소형화와 고용량화에 대응하기 위하여 정전 용량을 높히기 위해서 높은 유전율을 갖는 유전체를 사용하고 유전체 두께를 얇게하며, 고신뢰성의 적층 세라믹 콘덴서를 제조하기 위해서 소결후 유전체의 결정립이 미세하고 치밀하며 높은 절연 저항과 높은 절연 파괴 전압을 갖는 유전체의 개발이 필수적이다.In order to cope with the recent miniaturization and high capacity, the dielectric having high dielectric constant is used to increase the capacitance, the dielectric thickness is thin, and the grain of the dielectric is fine and dense after sintering to manufacture a highly reliable multilayer ceramic capacitor. Development of dielectrics with high insulation resistance and high dielectric breakdown voltage is essential.
본 발명의 세라믹 유전체 조성물을 적층 세라믹 콘덴서에 이용하면 유전체 층의 두께를 얇게할 수 있어 원가 절감의 효과가 클뿐 아니라, 소형화 및 고용량화에 대응할 수 있는 고신뢰성의 제품을 생산할 수 있다.When the ceramic dielectric composition of the present invention is used in a multilayer ceramic capacitor, the thickness of the dielectric layer can be reduced, so that the cost reduction effect is large, and a high reliability product capable of coping with miniaturization and high capacity can be produced.
Description
제1도는 적층 세라믹 콘덴서의 개략도이다.1 is a schematic diagram of a multilayer ceramic capacitor.
제2도는 EIA의 적층 세라믹 콘덴서에 대한 X7R 온도 특성규격을 나타내는 유전율의 온도 특성 범위와 본 발명의 실시예 2에 따른 유전율의 온도 특성을 도시한 도면2 is a diagram showing the temperature characteristic range of the dielectric constant showing the X7R temperature characteristic specification for the multilayer ceramic capacitor of EIA and the temperature characteristic of the dielectric constant according to Example 2 of the present invention.
*도면의 주요부분에 대한 부호의 설명-* Explanation of symbols for main parts of drawing-
1: 유전체 2 : 내부전극1: dielectric 2: internal electrode
3: 외부전극 A : X7R 규격에서 정한 유전율의 온도특성 범위3: External electrode A: Temperature characteristic range of dielectric constant as defined in X7R standard
B : 실시예 2에 따른 조성물의 유전율의 온도특성(temperature characteristics ; T.CB: temperature characteristics of the dielectric constant of the composition according to Example 2 (T.C.
본 발명은 민생용 및 산업용 전자 기기등에 사용되는 대표적인 부품의 하나인 적층 세라믹 콘덴서 제조용 유전체 조성물에 관한 것으로, 특히 미국 EIA(Electronic Industrial Association)에서 정한 X7R 규격특성(-55℃∼+125℃의 온도 범위에서 25℃에서의 유전율을 기준으로 하여 온도 변화에 따른 유전율의 변화율이 ±15%이내)을 만족시키는 동시에 3,900∼4,500의 높은 유전율을 가지며, 절연 저항이 1013∼1014Ωcm로 높고, 절연 파괴 전압도 15KV/mm 이상인 세라믹 유전체 조성물에 관한 것이다.The present invention relates to a dielectric composition for the manufacture of multilayer ceramic capacitors, which is one of the typical components used in consumer and industrial electronic devices, and in particular, the X7R specification characteristics (-55 ° C. to + 125 ° C.) set by the US EIA (Electronic Industrial Association). It has a high dielectric constant of 3,900 to 4,500 and a high dielectric constant of 10 13 to 10 1 4Ωcm while satisfying the change in dielectric constant with temperature change within ± 15% based on the dielectric constant at 25 ° C in the range. The breakdown voltage also relates to a ceramic dielectric composition of at least 15 KV / mm.
여기에서 유전체(Dielectric Substance)란 정전기장을 가할 때 전기분극(電氣分極)은 생기나 직류전류는 생기지 않는 물질을 말한다.Here, dielectric substance refers to a substance in which electric polarization occurs but no direct current occurs when an electrostatic field is applied.
최근 적층 세라믹 콘덴서는 각종 전자 기기의 소형, 경량화의 추세에 따라 표면 실장이 가능하고 부품 자체의 소형화와 단위 체적당 높은 정전 용량을 나타내는 특성이 기인하여, 캠코더, 하드디스크 드라이브 등의 각종 전자 제품의 수동 소자로 광범위하게 사용되고 있으며, 앞으로도 그 이용 범위는 더욱 확대될 것으로 기대되고 있다.Recently, multilayer ceramic capacitors can be surface-mounted according to the trend of miniaturization and weight reduction of various electronic devices, and due to the miniaturization of components and high capacitance per unit volume, the use of various electronic products such as camcorders and hard disk drives It is widely used as a passive device, and its use is expected to expand further.
표면실장이란 기판의 면과 부품의 면을 면과 면의 대응방식으로 접속하는 방법을 말한다.Surface mounting means a method of connecting the surface of a board | substrate and the surface of a component by the surface-to-surface correspondence method.
이와같은 적층 세라믹 콘덴서의 내부 구조는 제1도에 나타나 있듯이 세라믹 유전체(1) 의 내부에 교차적으로 내부전극(2)이 형성되고, 그 내부전극(2)이 일단의 외부로 노출된 세라믹 유전체(1) 의 양 측면에 외부전극(3)이 형성되도록 이루어진다.As shown in FIG. 1, the internal structure of the multilayer ceramic capacitor has a ceramic dielectric in which internal electrodes 2 are alternately formed inside the ceramic dielectric 1, and the internal electrodes 2 are exposed to the outside. The external electrodes 3 are formed on both sides of (1).
이러한 내부 구조에 있어서 적층 세라믹 콘덴서의 사용에 있어서 중요한 선택 기준이 되는 정전 용량(electrostatic capacitance)은 유전체의 고유값인 유전율(Dielectric Constant), 내부 전극의 유효한 대향 면적과 적층수에 비례하고, 유전체의 두께에는 반비례하게 된다. 정전 용량은 콘덴서에서 전하를 축적할 수 있는 능력을 나타내며 단위는 파라드(farad, F)이다.The electrostatic capacitance, which is an important selection criterion in the use of multilayer ceramic capacitors in this internal structure, is proportional to the dielectric constant, the intrinsic value of the dielectric, the effective opposing area of the internal electrode, and the number of stacked layers. It is inversely proportional to the thickness. Capacitance refers to the ability to accumulate charge in a capacitor and is in units of farad (F).
따라서 최근의 제품의 소형화와 고용량화에 대응하기 위하여 규정된 크기의 적층 세라믹 콘덴서에 있어서 단위 체적당 정전 용량을 높히기 위해서는 높은 유전율을 갖는 유전체의 사용과 유전체 두께를 얇게 할 필요성이 대두되고 있다.Therefore, in order to increase the capacitance per unit volume in the multilayer ceramic capacitor of a prescribed size in order to cope with the recent miniaturization and high capacity of the product, the use of a dielectric having a high dielectric constant and the thickness of the dielectric is increasing.
그러나 종래의 세라믹 유전체 조성물은 특히 넓은 온도 범위에서 안정된 유전율의 온도 특성을 갖는 X7R 특성을 만족하는 세라믹 유전체 조성물은 BaTiO3와 Nb2O5를 주성분으로 하여 각종 부성분을 첨가하여 제조하였다. 즉, 일본 특허공보 소 61-99207호에서 MgO와 CeO2를 첨가하였으며, 소 62-229605호에서 Co2O3, MnO2및 CeO2를 첨가하였다.However, in the conventional ceramic dielectric composition, in particular, a ceramic dielectric composition satisfying the X7R characteristic having a stable dielectric constant temperature characteristic in a wide temperature range was prepared by adding various subcomponents based on BaTiO 3 and Nb 2 O 5 as main components. That is, MgO and CeO 2 were added in Japanese Patent Laid-Open No. 61-99207, and Co 2 O 3 , MnO 2, and CeO 2 were added in Sho 62-229605.
그러나 상기의 조성물로 제조된 세라믹 유전체 조성물은 유전손실이 0.8%이상으로 높고, 절연 저항도 1011Ωcm로 높은 값을 갖으며 X7R 특성을 만족하는 적층 세라믹 콘덴서 제조용 유전체 조성물을 제공하는데 있다.However, the ceramic dielectric composition prepared from the above composition has a dielectric loss of 0.8% or more, a high insulation resistance of 10 11 Ωcm, and a dielectric composition for manufacturing a multilayer ceramic capacitor that satisfies X7R characteristics.
상술한 목적을 달성하기 위하여 본 발명에서는 96.88∼98.458 몰%의 BaTiO3를 주성분으로 하고 여기에 0.95∼1.49 몰%의 Nb2O5, 0.16∼0.75 몰%의 Dy2O3, 0.2∼0.5 몰%의 MnO2및 0.15∼0.40 몰%의 NiO를 첨가하여 세라믹 유전체 조성물을 구성하였다.In order to achieve the above object, in the present invention, 96.88 to 98.458 mol% of BaTiO 3 is the main component, and 0.95 to 1.49 mol% of Nb 2 O 5 , 0.16 to 0.75 mol% of Dy 2 O 3 , and 0.2 to 0.5 mol % Of MnO 2 and 0.15 to 0.40 mol% of NiO were added to form a ceramic dielectric composition.
본 발명의 상기 조성물 구성에 있어서 Nb2O5는 BaTiO3의 큐리 온도(Curie Temperature)에서의 매우 높은 유전율을 낮추어 평탄한 유전율의 온도 특성을 갖게 하는 동시에 결정립의 성장을 억제하여 결정립의 입경을 1∼3㎛ 정도로 매우 미세하게 만드는 역할을 한다.In the composition of the present invention, Nb 2 O 5 has a very high dielectric constant at the Curie temperature of BaTiO 3 to have a flat dielectric constant temperature characteristic and inhibits grain growth, thereby reducing the grain size of 1 to It acts to make very fine, about 3㎛.
희토류 산화물(Rare Earth Oxied)인 Dy2O3의 첨가는 온도 특성의 개선과 유전율을 증가시키는 효과가 있으며, 미세하고 치밀한 소결 상태를 나타나게 한다.The addition of Dy 2 O 3 , which is a rare earth oxide, has the effect of improving the temperature characteristics and increasing the dielectric constant, showing a fine and dense sintered state.
전이 금속 산화물(Transition Metal Oxide)인 MnO2와 NiO는 손실값을 낮추고, 절연 저항을 증가시키는 역활과 특히 저온 영역에서의 온도 특성 개선에 효과적으로 작용한다.MnO 2 and NiO, transition metal oxides, are effective in reducing losses, increasing insulation resistance, and improving temperature characteristics, especially in the low temperature range.
이상에서의 Nb2O5, Dy2O3, MnO2및 NiO의 첨가량이 상기 조성물 범위를 벗어나게 되었을 때는 유전율, 온도특성, 절연 저항, 절연파괴 전압 등의 전기적 특성을 각각 개별적으로는 본 발명의 목적을 만족할 수는 있으나, 전체적으로 종합된 전기적 특성은 본 발명의 목적을 만족할 수 없게 된다.When the addition amount of Nb 2 O 5 , Dy 2 O 3 , MnO 2 and NiO is out of the composition range, the electrical properties such as dielectric constant, temperature characteristic, insulation resistance, breakdown voltage, and the like are respectively individually Although the object can be satisfied, the overall integrated electrical characteristics cannot satisfy the object of the present invention.
이상 상술한 본 발명에 따른 세라믹 유전체 조성물은 유전율이 3900∼4500으로 높고, 유전손실은 0.5%이하이고, 절연저항은 1013∼1014Ωcm이며, 절연 파괴 전압은 15KV/mm이상인 동시에 X7R 온도 특성 규격을 만족하게 된다.The ceramic dielectric composition according to the present invention described above has a high dielectric constant of 3900 to 4500, a dielectric loss of 0.5% or less, an insulation resistance of 10 13 to 10 14 Ωcm, an insulation breakdown voltage of 15 KV / mm or more, and an X7R temperature characteristic. The specification is satisfied.
따라서 본 발명의 세라믹 유전체 조성물을 적층 세라믹 콘덴서 제조에 이용하면 상기 특성으로 인하여 원가 절감효과가 지대하며, 소형이면서도 고용량의 신뢰성 높은 제품생산이 가능해지는 효과가 기대된다.Therefore, when the ceramic dielectric composition of the present invention is used in the manufacture of a multilayer ceramic capacitor, the cost reduction effect is enormous due to the above characteristics, and it is expected that an effect of producing a small and high capacity reliable product can be expected.
이하 실시예 및 비교예를 통하여 본 발명의 제조방법 및 그 효과에 대하여 구체적으로 설명한다. 그러나 본 실시예만으로 본 발명을 한정하는 것은 아니다.Hereinafter, the production method and effects of the present invention will be described in detail through Examples and Comparative Examples. However, the present invention is not limited only to this embodiment.
[실시예 1∼6]EXAMPLES 1-6
출발 원료로 BaTiO3, Nb2O5, Dy2O3, MnO2및 NiO를 표1 에 표시된 조성물이 되도록 평량한 뒤, 불순물의 혼입을 방지하기 위해 나일론 재질의 포토에서 지르코니아 볼을 이용하여 탈이온수와 함께 볼 밀링 방법으로 약 12시간 동안 습식, 혼합하여 분말상 혼합물을 제조한다.BaTiO 3 , Nb 2 O 5 , Dy 2 O 3 , MnO 2 and NiO as starting materials were weighed to the composition shown in Table 1, and then descaled using a zirconia ball from a nylon stock to prevent impurities from mixing. A powdery mixture was prepared by wet and mixing for about 12 hours by ball milling with ionized water.
균일하게 혼합된 상기 유전체 분말을 약 120℃ 정도에서 건조한 후, 여기에 폴리비닐알콜 5% 수용액을 유전체 분말에 대하여 약 5wt% 첨가하여 조립화한 다음 일축 가압 성형기를 이용하여 직경 10mm의 원판형 성형제를 제작한다. 이때 성형체 시편의 두께는 1.0∼1.2mm 정도가 되고 성형 밀도는 약 3.6g/㎤가 되게 한다.The uniformly mixed dielectric powder was dried at about 120 ° C., and then granulated by adding about 5 wt% of a polyvinyl alcohol 5% aqueous solution to the dielectric powder, and then using a single screw press machine to form a 10 mm diameter disk. Craft the festival. In this case, the thickness of the molded product specimen is about 1.0 to 1.2 mm and the molding density is about 3.6 g / cm 3.
성형된 시편은 안정화된 지르코니아 세터에 올려놓고 1290∼1320℃에서 약 2시간 동안 공기분위기의 전기로에서 소결을 실시한다.The molded specimens are placed on a stabilized zirconia setter and sintered at an electric atmosphere in an air atmosphere at 1290 to 1320 ° C. for about 2 hours.
소결된 시편의 양면에 은 전극을 7mm 직경의 원형으로 도포하고 건조한 후, 800℃에서 열처리하면 전기적 특성을 측정할 수 있는 최종 시편이 만들어지게 된다.On both sides of the sintered specimens, a silver electrode was applied in a circular shape with a diameter of 7 mm, dried and heat-treated at 800 ° C. to produce a final specimen for measuring electrical characteristics.
전기적 특성 측정에 있어서, 유전율과 유전 손실은 미국 휴렛 팩커드사의 용량계(모델명: HP 4278A, Capacitance meter)를 사용하여 25℃, 1KHz, 1V의 측정 조건으로 측정하고, 유전율의 온도 특성은 상기 용량계와 -55∼+125℃까지 온도 조절이 가능한 항온도를 조합하여 측정하였으며, 절연 저항은 휴렛 팩커드사의 고저항 측정기(모델명 433A)를 사용하여 100V의 전류 전압을 1분동안 인가한 후 측정하였다.In measuring electrical characteristics, dielectric constant and dielectric loss were measured using a Hewlett-Packard Co. capacitance meter (Model: HP 4278A, Capacitance meter) under measurement conditions of 25 ° C, 1KHz, and 1V. And a constant temperature controllable temperature range from -55 to + 125 ° C were measured. The insulation resistance was measured after applying a current voltage of 100V for 1 minute using Hewlett Packard's high resistance measuring device (model name 433A).
또한 절연파괴전압은 자체 제작한 전열 파괴 전압 측정기를 사용하여 공기중에서 측정기 발생하는 공기중으로 전류가 흐르는 것(over flash)을 방지하기 위하여 절연유 속에서 측정을 실시하였다. 이상과 같은 방법으로 측정한 전기적 특성의 결과치를 표2에 나타내었다.In addition, the breakdown voltage was measured in an insulating oil using a self-made electrothermal breakdown voltage meter to prevent over flash of current in the air generated by the meter. Table 2 shows the results of the electrical characteristics measured by the above method.
[비교예 1∼4][Comparative Examples 1 to 4]
BaTiO3, Nb2O5, Dy2O3, MnO2및 NiO를 표1에 기재된 것과 같이 보발명의 범위를 벗어난 양으로 혼합한 것을 제외하고는 실시예 1∼6에 기재된 것과 동일한 방법으로 세라믹 유전체 조성물을 제조하였으며, 또한 동일한 방법으로 전기적 특성을 측정하여 그 결과치를 표2에 나타내었다.Ceramics were prepared in the same manner as described in Examples 1 to 6, except that BaTiO 3 , Nb 2 O 5 , Dy 2 O 3 , MnO 2 and NiO were mixed in an amount outside the range of the complementary name as shown in Table 1 A dielectric composition was prepared, and the electrical properties were measured in the same manner, and the results are shown in Table 2.
상술한 실시예 및 비교예로부터 알 수 있듯이 본 발명의 세라믹 유전체 조성물은 유전율은 3900∼4500 정도로 높고, 유전 손실은 0.65%이하이며, 절연 저항은 1013∼1014Ωcm로 높은 값을 가지며, 절연파괴 전압은 15KV/mm 이상인 동시에 온도 특성 또한 ±15% 이내로 X7R 규격을 만족하고 있었다.As can be seen from the above-described examples and comparative examples, the ceramic dielectric composition of the present invention has a high dielectric constant of about 3900 to 4500, a dielectric loss of 0.65% or less, an insulation resistance of 10 13 to 10 14 Ωcm, and a high value of insulation. The breakdown voltage was 15KV / mm or more, and the temperature characteristics were also within ± 15%, satisfying the X7R specification.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950052732A KR0145121B1 (en) | 1995-12-20 | 1995-12-20 | Dielectric ceramic compositions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950052732A KR0145121B1 (en) | 1995-12-20 | 1995-12-20 | Dielectric ceramic compositions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970042423A KR970042423A (en) | 1997-07-24 |
| KR0145121B1 true KR0145121B1 (en) | 1998-07-15 |
Family
ID=19441899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950052732A KR0145121B1 (en) | 1995-12-20 | 1995-12-20 | Dielectric ceramic compositions |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0145121B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10147547B2 (en) | 2014-11-05 | 2018-12-04 | Samsung Electro-Machanics Co., Ltd. | Multilayer ceramic electronic component and method of manufacturing the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100395089B1 (en) * | 2000-12-20 | 2003-08-21 | 삼성전기주식회사 | A dielectric compositions for Y5V type multilayer ceramic Chip Capacitors having the inner electrode of Ni |
-
1995
- 1995-12-20 KR KR1019950052732A patent/KR0145121B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10147547B2 (en) | 2014-11-05 | 2018-12-04 | Samsung Electro-Machanics Co., Ltd. | Multilayer ceramic electronic component and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR970042423A (en) | 1997-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11292747B2 (en) | Barium strontium titanate-based dielectric ceramic materials, preparation method and application thereof | |
| KR100418601B1 (en) | Non-reducing dielectric ceramic, monolithic ceramic capacitor using the same, and method for making non-reducing dielectric ceramic | |
| JP2000053466A (en) | Non-reducible dielectric porcelain composition and laminated ceramic capacitor using the same | |
| EP0256405B1 (en) | Semiconductive ceramic composition | |
| JPH0684692A (en) | Multilayer ceramic chip capacitor | |
| KR100337651B1 (en) | Dielectric Ceramic Composition, Electric Device and Production Method thereof | |
| JP7196484B2 (en) | Dielectric compositions and electronic components | |
| KR0145121B1 (en) | Dielectric ceramic compositions | |
| KR100444225B1 (en) | Dielectric ceramic composition, ceramic capacitor using the same and process of producing thereof | |
| KR0161219B1 (en) | High frequency dielectric ceramic composition for ceramic condenser | |
| KR0145122B1 (en) | Dielectric ceramic compositions | |
| KR20050012134A (en) | Dielectric ceramic composition and ceramic electronic component | |
| KR0145125B1 (en) | Dielectric ceramic compositions | |
| JPS6256361A (en) | Dielectric ceramic composition | |
| JP2789110B2 (en) | High dielectric constant porcelain composition | |
| KR0145120B1 (en) | Clielectric ceramic compositims | |
| KR100245811B1 (en) | Dielectric composition of ceramic capacitor and manufacturing method thereof | |
| KR101429034B1 (en) | Dielectric ceramic composition and electronic component | |
| JPH11162775A (en) | Dielectric porcelain composition | |
| JPH0737427A (en) | Dielectric ceramic composition | |
| KR101559036B1 (en) | Dielectric ceramic and single-plate capacitor | |
| KR890002696B1 (en) | High dielectric constant ceramic material and method of manufacturing the same | |
| JP2002037663A (en) | Dielectric ceramic composition | |
| KR100452817B1 (en) | Dielectric ceramic composition, ceramic capacitor using the same and process of producing thereof | |
| JP3106371B2 (en) | Dielectric porcelain composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| LAPS | Lapse due to unpaid annual fee |