Abstract:
A multilayer ceramic composition showing good characteristics, even when electric intensity on dielectric layers is high and a stacked number of a multilayer ceramic capacitor is increased, and an electronic device thereof. Said composition comprises: a perovskite compound ABO3, and with respect to 100 moles of said compound, 0.6 or more to 1.4 or less moles of Ra2O3 in which Ra is at least one of Dy, Gd and Tb, 0.2 or more to 0.7 or less moles of Rb2O3 in which Rb is at least one of Ho and Y, and 0.2 or more to 0.7 or less moles of Rc2O3 in which Rc is at least one of Yb and Lu, in terms of each oxide, 0.6 or more to 1.6 or less moles of Mg oxide in terms of Mg, and 0.6 or more to less than 1.2 moles of Si included compound in terms of Si.
Abstract translation:即使电介质层上的电强度高,叠层数多的多层陶瓷电容器也具有良好的特性的多层陶瓷组合物及其电子器件。 所述组合物包括:钙钛矿化合物ABO 3,相对于100摩尔所述化合物,其中Ra为Dy,Gd和Tb中至少一种为0.2以上至0.7以下的Ra 2 O 3为0.6以上且1.4摩尔以下 其中R b为至少一种Ho和Y的摩尔数,以及其中Rc为Yb和Lu中的至少一种的Rc2O3的0.2或更多至0.7或更小的摩尔数,就每种氧化物而言为0.6或更多至1.6或 以Mg换算的氧化镁摩尔数少,Si含量为0.6以上且小于1.2摩尔Si的化合物。
Abstract:
A dielectric ceramic composition includes at least dielectric particles having a core-shell structure and segregation particles, a concentration of a rare earth compound in the segregation particle is twice or more than an average concentration of the rare earth compound in a shell part of the dielectric particle having the core-shell structure, an area occupied by the segregation particles is 0.1 to 1.1%, when a maximum particle size of the segregation particle is defined as rbmax, a minimum particle size of the segregation particle is defined as rbmin, and an average particle size of the dielectric particle having the core-shell structure is defined as ra, a relation of rbmax/ra≦2.00 and rbmin/ra≧0.25 is satisfied, and the segregation particles substantially do not include Mg.