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    • 9. 发明授权
    • Dielectric ceramic composition and device for communication apparatus using the same
    • 介电陶瓷组合物及其使用的通信装置
    • US06258462B1
    • 2001-07-10
    • US09286815
    • 1999-04-06
    • Hiroshi KagataHidenori Katsumura
    • Hiroshi KagataHidenori Katsumura
    • C04B3510
    • H01P1/20345C03C8/14C04B35/111C04B35/443C04B35/50
    • A dielectric ceramic composition used in a high frequency band such as microwave or millimeter wave, etc., and having a low dielectric constant, low loss and small absolute value of the temperature coefficient at resonance frequency. The dielectric ceramic composition comprises Al2O3, MgO and ROn. The Al2O3, MgO and ROn are expressed by a composition formula: xAlO3/2—YMgO—zROn (R is at least one element selected from La, Ce, Pr, Nd, Sm, Eu, Gd and Tb; and n is a value stoichiometrically determined in accordance with the valence of the R), wherein x≧55, y≧0.5, z≧0.5 and x+y+z=100. A dielectric ceramic comprising a crystal phase and a glass phase also is provided. The crystal phase includes a magneto-plumbite phase that includes Al2O3.
    • 用于微波或毫米波等高频带的介电陶瓷组合物,在谐振频率下具有低的介电常数,低的损耗和较小的温度系数的绝对值。 电介质陶瓷组合物包含Al2O3,MgO和ROn。 Al2O3,MgO和ROn由组成式xAlO3 / 2-YMgO-zROn表示(R为选自La,Ce,Pr,Nd,Sm,Eu,Gd和Tb中的至少一种元素; n为 化学计量地根据R的化合价测定),其中x> = 55,y> = 0.5,z> = 0.5,x + y + z = 100。 还提供了包含结晶相和玻璃相的介电陶瓷。 晶相包括包含Al 2 O 3的磁铅垂相。