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    • 4. 发明公开
    • 유전체 자기조성물
    • 电介质陶瓷组合物
    • KR1020030040081A
    • 2003-05-22
    • KR1020020069509
    • 2002-11-11
    • 엔지케이 스파크 플러그 캄파니 리미티드
    • 토사아키후미오츠카준사토마나부
    • C04B35/01
    • C04B35/475C04B35/462C04B35/62695C04B2235/3201C04B2235/3215C04B2235/3224C04B2235/3298C04B2235/604C04B2235/94H01P1/2056
    • PURPOSE: To provide a dielectric ceramic composition having a high εr value and Qu value and the small absolute value of τf. CONSTITUTION: This dielectric ceramic composition contains Ba, Nd, Pr, Bi, and Ti and at least either of Na and K which exist within ranges of 1.5≤a≤2.6, 0.02≤b≤1.00, 0.2≤c≤0.6, 4.5≤d≤5.5 and 0.02≤e≤0.30 when the composition is expressed by a composition formula: BaO-aNdO3/2-PrO11/6-cBiO3/2-dTiO2- eAO1/2 (A=Na, K). The dielectric ceramic composition is obtained by mixing the oxide powders of the respective metal oxides and/or the compound powders to be made into the respective metal oxides by heating at prescribed mole ratios and firing the mixture. As a result, a specific dielectric constant εr can be made to ≧90, the product Quxf0 of a non-load quality coefficient and resonance frequency to ≧3,800 GHz and the absolute value of the temperature coefficient τf of the resonance frequency to ≤17 ppm/°C.
    • 目的:提供具有高εr值和Qu值和小的绝对值τf的介电陶瓷组合物。 构成:该介电陶瓷组合物含有Ba,Nd,Pr,Bi和Ti,并且Na和K中的至少一种存在于1.5≤a≤2.6,0.02≤b≤1.00,0.2≤c≤0.6,4.5≤ 当组成为组成式:BaO-aNdO3 / 2-PrO11 / 6-cBiO3 / 2-dTiO2-eAO1 / 2(A = Na,K)时,d≤5.5和0.02≤e≤0.30。 电介质陶瓷组合物通过将各种金属氧化物的氧化物粉末和/或要制成的化合物粉末按照规定的摩尔比加热并混合,得到相应的金属氧化物。 结果,可以将比介电常数εr设定为≥90,将非负载质量系数和谐振频率的乘积Quxf0和≥3,800GHz,将谐振频率的温度系数τf的绝对值设定为≤17ppm /C。