DIELECTRIC CERAMIC COMPOSITION

• Main Authors: IWAMOTO, SAKIKO, HAMAJI, YUKIO, SHIBATA, MASAMITSU
• Format: Patent
• Language: English; Korean
• Published: 16.11.1998
• Edition: 6
• Subjects: ARTIFICIAL STONE; BASIC ELECTRIC ELEMENTS; CABLES; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CONDUCTORS; ELECTRICITY; INSULATORS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SLAG; TREATMENT OF NATURAL STONE

본 발명은 주성분을 97.5~99.95중량%, 제1부성분을 0.05~2.5중량%의 양으로 함유하고 있는 유전체 세라믹 조성물에 관한 것이고, 또한, 본 발명은 주성분을 97.0~99.94중량%, 제1부성분을 0.05~2.5중량% 및 제2부성분을 0.01~0.5중량%의 양으로 함유하고 있는 유전체 세라믹 조성물에 관한 것이다. 주성분은 하기의 식으로 표시되는 혼합물이다: {100-(a+b+c+d)}BaTiO+aZnO+b(2BiO·3AO)+cTaO+dReO 상기 식에서, A는 Zr(지르코늄) 또는 Sn(주석)을 나타내고; Re는 La(란탄), Pr(프라세오디뮴), Nd(네오디뮴), Sm(사마륨), Dy(디스프로슘) 및 Er(에르븀)으로 이루어진 군으로부터 선택된 적어도 1종을 나타내며; {100-(a+b+c+d)}, a, b, c 및 d는 각각 BaTiO, ZnO, (2BiO·3AO), TaO및 ReO의 함량을 몰퍼센트(molar percent)로 나타낸 것으로, a, b, c 및 d는 하기의 관계식을 만족시킨다. 0.5 ≤ a ≤ 4.5 0.5 ≤ b ≤ 4.5 0.5 ≤ c ≤ 4.5 0.5 ≤ d ≤ 5.5 상기한 제1부성분은 주로 SiO(이산화 규소)를 주로 함유하는 유리이다. 상기한 제2부성분은 Cr(크롬), Mn(망간), Fe(철), Co(코발트) 및 Ni(니켈)의 산화물들로 이루어진 군으로부터 선택된 적어도 1종이다. The present invention relates to a dielectric ceramic composition, comprising from 97.5 to 99.95% by weight of a main component and from 0.05 to 2.5% by weight of a first subsidiary component, and also a dielectric ceramic composition, comprising from 97.0 to 99.94% by weight of a main component, from 0.05 to 2.5% by weight of a first subsidiary component, and from 0.01 to 0.5% by weight of a second subsidiary component. The main component is a mixture represented by formula: {100-(a+b+c+d)}BaTiO3 + aZnO + b(2Bi2O3.3AO2) + cTa2O5 + dRe2O3 wherein A represents Zr (first embodiment) or Sn (second embodiment); Re represents at least one selected from the group consisting of La, Pr, Nd, Sm, Dy and Er; and {100-(a+b+c+d)}, a, b, c, and d represent the contents of BaTiO3, ZnO, (2Bi2O3.3AO2), Ta2O5, and Re2O3 in terms of molar percent, respectively, provided that a, b, c, and d satisfy the following relationships: 0.5 </= a </= 4.5 0.5 </= b </= 4.5 0.5 </= c </= 4.5 0.5 </= d </= 5.5 The first subsidiary component is glass mainly comprising SiO2. The second subsidiary component is at least one selected from the group consisting of oxides of Cr, Mn, Fe, Co, and Ni.