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    • 1. 发明授权
    • Ceramic electronic part, and method for the production thereof
    • 陶瓷电子部件及其制造方法
    • US6103385A
    • 2000-08-15
    • US64833
    • 1998-04-23
    • Nobuhiro Sasaki
    • Nobuhiro Sasaki
    • H01G4/12C04B35/462C04B35/468H01G4/012B32B9/00C04B35/46
    • C04B35/462C04B35/4686C04B35/4688Y10T428/24355Y10T428/24917Y10T428/2913
    • The ceramic electronic part has a ceramic material and an electrode formed on the surface of the ceramic material. The ceramic material has rod-shaped particles formed projecting from the surface thereof, the rod-shaped particles having an aspect ratio (a long axis/short axis ratio) of from 3 to 30. The ceramic material is formed using a dielectric ceramic composition containing, as a major component, a composite oxide which, for example, comprises an oxide of barium (Ba), an oxide of titanium (Ti) an oxide of at least one rare earth element and one or both of an oxide of bismuth (Bi) and an oxide of lead (Pb). The ceramic electronic part can improve its characteristics at high frequency inherent in conventional ones which suffer from the remarkably worsening of their high frequency characteristics due to a rise in the specific resistance of the electrode when it attempts to improve the adherence strength of the electrode are made using an electrode paste to which a component capable of causing a chemical reaction with the ceramic material or which worsen their high frequency characteristics by the remaining of materials obtained by the reaction with a treatment liquid on the surface of the ceramic material when attempts are made to improve the adherence strength between the ceramic material and the electrode by chemical treatment.
    • 陶瓷电子部件具有形成在陶瓷材料表面上的陶瓷材料和电极。 陶瓷材料具有从其表面突出形成的棒状颗粒,该棒状颗粒具有3至30的纵横比(长轴/短轴比)。陶瓷材料使用包含 作为主要成分的复合氧化物,例如包含钡(Ba)的氧化物,钛(Ti)的氧化物,至少一种稀土元素的氧化物和铋的氧化物(Bi )和铅(Pb)的氧化物。 陶瓷电子部件可以提高其在常规的固有的高频下的特性,其中当试图提高电极的粘附强度时,由于电极的电阻率的上升而使其高频特性显着恶化 使用能够与陶瓷材料发生化学反应的成分的电极糊料,或者通过与陶瓷材料的表面上的处理液反应而获得的剩余材料使其高频特性恶化, 通过化学处理提高陶瓷材料与电极之间的粘附强度。
    • 10. 发明申请
    • MICROWAVE DIELECTRIC CERAMIC COMPOSITION
    • 微波电介质陶瓷组合物
    • WO99062840A1
    • 1999-12-09
    • PCT/JP1998/002467
    • 1998-06-04
    • C04B35/46C04B35/468H01B3/12H01P7/10C04B35/50
    • H01B3/12C04B35/4686C04B35/4688C04B2235/3224C04B2235/3227C04B2235/3229C04B2235/3298C04B2235/6585
    • A microwave dielectric ceramic composition exhibiting excellent relative permitting ( epsilon ) and high Qf-value, enabling the temperature coefficient of resonance frequency to be easily adjusted, and being best suited for a filter having cavities made of, e.g., iron or copper exhibiting a large temperature coefficient of resonance frequency. The ceramic is of a BaO-TiO2-Nd2O3-Sm2O3 ceramic, type wherein Nd2O3 is partly substituted by Bi2O3, Nd2O3 is partly substituted by Ln2O3 (where Ln is La, Ce or Pr) and, the above substituted Ln2O3 is partly substituted by Eu2O3 to improve the properties so that epsilon is 82.5 to 92.5, Qf is 6000 to 7300 GHz and tau f is 10 -20 ppm/ DEG C. This makes it possible to impart favorable electric characteristics to resonance cavities of various materials and sizes.
    • 显示出优异的相对允许(ε)和高Qf值的微波介电陶瓷组合物,使得谐振频率的温度系数能够容易地调节,并且最适合于具有由例如铁或铜制成的空腔的过滤器 谐振频率的温度系数。 陶瓷是BaO-TiO2-Nd2O3-Sm2O3陶瓷,其中Nd2O3部分被Bi2O3取代,Nd2O3部分地被Ln2O3(其中Ln是La,Ce或Pr)取代,并且上述取代的Ln 2 O 3部分被Eu 2 O 3取代 为了改善性能,使得ε为82.5〜92.5,Qf为6000〜7300GHz,τf为10〜20ppm /℃。这使得可以赋予各种材料和尺寸的谐振腔有利的电特性。