Abstract:
The object of the present invention is to provide a multilayer ceramic electronic component having improved highly accelerated lifetime and specific permittivity. A multilayer ceramic electronic component comprising a multilayer body in which an internal electrode layer and a dielectric layer are stacked in alternating manner, wherein the dielectric layer comprises a dielectric ceramic composition having a main component expressed by a general formula ABO3 (A is Ba and the like, and B is Ti and the like) and a rare earth component R, a segregation phase including the rare earth component R exists in the dielectric layer, an area ratio of the segregation phases in a cross section along a stacking direction is 104 ppm to 961 ppm, and 96% or more of a total area of the segregation phases contact with the internal electrode layer.
Abstract:
A dielectric ceramic composition having good properties, particularly good IR property and high temperature accelerated lifetime, even under high electric field intensity. A dielectric ceramic composition having a main component made of a perovskite type compound expressed by a compositional formula of (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, m, x, y, and z of the above compositional formula all represent molar ratios, and each satisfies 0.9
Abstract:
A dielectric composition includes a main phase and segregation phases each including RE (at least one rare earth element). The main phase includes a main component having a perovskite crystal structure of ABO3 (A is one or more selected from Ba, Sr, and Ca, and B is one or more selected from Ti, Zr, and Hf). The segregation phases are classified into first segregation phases whose atomic ratio of Si to RE is 0 or more and 0.20 or less and second segregation phases whose atomic ratio of Si to the RE is more than 0.20. 0≤S1/S2≤0.10 is satisfied on a cross section of the dielectric composition, where S1 is an area ratio of the first segregation phases, and S2 is an area ratio of the second segregation phases. An atomic ratio of Si to RE in the second segregation phases is 0.80 or less on average.
Abstract:
A dielectric ceramic composition includes a barium titanate, an oxide of an R element, an oxide of an M element, and an oxide containing Si. The R element is one or more elements selected from Eu, Gd, Tb, Dy, Y, Ho, and Yb. The M element is one or more elements selected from Mg, Ca, Mn, V, and Cr. A ratio of an amount of the oxide of the R element in terms of R2O3 to an amount of the oxide containing Si in terms of SiO2 is 0.8:1 to 2.2:1. A ratio of an amount of the oxide of the M element in terms of MO to the amount of the oxide containing Si in terms of SiO2 is 0.2:1 to 1.8:1.50% or more of the number of dielectric particles constituting the dielectric ceramic composition is core-shell dielectric particles having a core-shell structure.
Abstract:
A dielectric composition includes main phases and Ca-RE-Si—O segregation phases. The main phases include a main component expressed by ABO3. “A” includes at least one selected from barium and calcium. “B” includes at least one selected from titanium and zirconium. “RE” represents at least one of rare earth elements. A molar ratio of (Si/Ca) is larger than one. A molar ratio of (Si/RE) is larger than one, provided that the molar ratio of (Si/RE) is a molar ratio of silicon included in the segregation phases to the rare earth elements included therein. An average length of major axes of the segregation phases is 1.30-2.80 times as large as an average particle size of the main phases. An average length of minor axes of the segregation phases is 0.21-0.48 times as large as an average particle size of the main phases.
Abstract:
A dielectric ceramic composition has good characteristics even under the high electric field intensity, and particularly good IR characteristic and the high temperature accelerated lifetime. The dielectric ceramic composition has a main component having a perovskite type compound shown by a compositional formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3, a first sub component having oxides of a rare earth element R, a second sub component as a sintering agent, wherein the dielectric particles has dielectric particles having high diffusion rate of the rare earth element, preferably of a complete solid solution particle, and when a concentration of Ti atom in the diffusion phase is 100 atom %, then an average concentration of the rare earth element R in the diffusion phase is 5 atom % or more, and an average concentration of Zr in the diffusion phase is 10 atom % or more.
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 multilayer electronic device includes an element body and a pair of external electrodes. The element body includes an interior region in which inner dielectric layers and internal electrode layers are alternately laminated and an exterior region located outside the interior region in its lamination direction. The pair of external electrodes exists on surfaces of the element body. Main-phase particles in the inner dielectric layers and outer dielectric layers of the exterior region include a main component having a perovskite crystal structure represented by a general formula of ABO3. r1
Abstract:
A dielectric composition includes a main-phase particle and segregation particles. The main-phase particle includes a main component having a perovskite crystal structure represented by a general formula of ABO3. The dielectric composition includes RA, RB, M, and Si. Each of A, B, RA, RB, and M is one or more elements selected from a specific element group. Each of an RA content CRA to the main component, an RB content CRB to the main component, an M content to the main component, and a Si content to the main component is within a predetermined range. 0.50
Abstract:
The object of the present invention is to provide the dielectric ceramic composition having good characteristics even under the high electric field intensity, and particularly good IR characteristic and the high temperature accelerated lifetime. The dielectric ceramic composition according to the present invention comprises a main component comprising a perovskite type compound shown by a compositional formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, said “m”, “x”, “y” and “z” all show a mol ratio, and each satisfies 0.94≦m≦1.1, 0≦x≦0.2, 0≦y≦0.2, 0.06≦z