Abstract: A multilayer electronic component includes a body including a dielectric layer and internal electrodes having the dielectric layer interposed therebetween in a first direction and external electrodes disposed on the body and connected to the internal electrodes, wherein the internal electrodes include nickel (Ni) and dysprosium (Dy) and 0.02 at %?C0?5 at % in which C0 is an atomic percentage (at %) calculated by dividing a number of atoms of Dy by a sum of a number of atoms of Ni and Dy included in the internal electrode.

Abstract: A dielectric composition includes dielectric particles and first segregations. The dielectric particles each include a perovskite compound represented by ABO3 as a main component. The first segregations each include at least Ba, V, and O. A molar ratio (Ba/Ti) of Ba to Ti detected in the first segregations is 1.20 or more.

Abstract: A multilayer ceramic radiofrequency mixer can include a first termination, a second termination, a third termination, and a fourth termination. A plurality of interleaved electrodes may include a first set of electrodes connected with the first termination, a second set of electrodes connected with the second termination, a third set of electrodes connected with the third termination, and a fourth set of electrodes connected with the fourth termination. A plurality of dielectric layers may be disposed between respective electrodes of the pluralities of interleaved electrodes. A dielectric constant of the plurality of dielectric layers may vary less than 10% in response to a DC bias voltage applied to the plurality of interleaved electrodes.

Abstract: A ceramic electronic component includes: a body including an active portion, including a first dielectric layer and an internal electrode, and a margin portion disposed a side surface of the active portion and including a second dielectric layer; and an external electrode disposed on the body and connected to the internal electrode. The first and second dielectric layers have different dielectric compositions. The first dielectric layer includes tin (Sn) and dysprosium (Dy). The second dielectric layer includes magnesium (Mg).

Abstract: A ceramic electronic device includes a multilayer structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked. A main component of the plurality of dielectric layers is a ceramic having a perovskite structure of which an A site includes at least Ba and of which an A/B ratio is 0.980 or less. The plurality of internal electrode layers include a co-material. A total amount of Ti, Zr and Hf is 90 mol % or more in metal elements included in the co-material and an amount of Ba is 10 mol % or less in the metal elements.

Abstract: A multilayer capacitor includes a capacitor body including dielectric layers and first and second internal electrodes, the capacitor body having first to sixth surfaces, the first internal electrode being exposed through the third, fifth, and sixth surfaces, and the second internal electrode being exposed through the fourth, fifth, and sixth surfaces, a first side portion and a second side portion, respectively disposed on the fifth surface and the sixth surface of the capacitor body, and a first external electrode and a second external electrode, respectively connected to the third surface and the fourth surface of the capacitor body to be respectively connected to the first internal electrode and the second internal electrode. The first and second side portions include an acicular second phase including a glass including aluminum (Al) and silicon (Si), manganese (Mn), and phosphorus (P).

Abstract: A multilayer electronic component includes a body including a dielectric layer and internal electrodes having the dielectric layer interposed therebetween in a first direction and external electrodes disposed on the body and connected to the internal electrodes, wherein the internal electrodes include nickel (Ni) and dysprosium (Dy) and 0.02 at %?C0?5 at % in which C0 is an atomic percentage (at %) calculated by dividing a number of atoms of Dy by a sum of a number of atoms of Ni and Dy included in the internal electrode.

Abstract: A multilayer capacitor includes a capacitor body including dielectric layers and first and second internal electrodes, the capacitor body having first to sixth surfaces, the first internal electrode being exposed through the third, fifth, and sixth surfaces, and the second internal electrode being exposed through the fourth, fifth, and sixth surfaces, a first side portion and a second side portion, respectively disposed on the fifth surface and the sixth surface of the capacitor body, and a first external electrode and a second external electrode, respectively connected to the third surface and the fourth surface of the capacitor body to be respectively connected to the first internal electrode and the second internal electrode. The first and second side portions include an acicular second phase including a glass including aluminum (Al) and silicon (Si), manganese (Mn), and phosphorus (P).

Abstract: A dielectric powder includes a core-shell structure including a core region formed in an inner portion thereof and a shell region covering the core region. The core region includes barium titanate (BaTiO3) doped with a metal oxide, and the shell region is formed of a ferroelectric material.

Abstract: A relaxor-ferroelectric material, a method of synthesizing the same and a device including the relaxor-ferroelectric material are provided. The relaxor-ferroelectric material includes a ferroelectric material having a first polarization characteristic. The ferroelectric material having the first polarization characteristics includes a plurality of regions having a second polarization characteristic and spaced apart from each other, and the first polarization characteristic and the second polarization characteristic are different from each other. The ferroelectric material having the first polarization characteristics and the plurality of regions have different response characteristics with respect to alternating current (AC) sweeping. The plurality of regions may include a solid solution.

Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, wherein a concentration of a rare earth element in an active region with respect to a main component ceramic of the active region is equal to or more than a concentration of a rare earth element in at least a part of a protective region with respect to a main component ceramic of the protective region, wherein an average ionic radius of the rare earth element of the at least a part of the protective region is equal to or less than an average ionic radius of the rare earth element in the active region.

Abstract: A ceramic capacitor includes: a multilayer structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, wherein a main component of the plurality of dielectric layers is ceramic having a perovskite structure expressed by BamTiO3 (0.9990?m?1.0015), wherein the plurality of dielectric layers include Mn as a first sub-component, Mg as a second sub-component, a rare earth element which is at least one of Ho and Dy as a third sub-component, V as a fourth sub-component, Si as a fifth sub-component, Ca as a sixth sub-component, wherein an average grain diameter of ceramic grains of the plurality of dielectric layers is 280 nm or more and 380 nm or less.

Abstract: Multilayer ceramic capacitor structures may include structural arrangements, materials, and/or substrate modifications that can improve the reliability of the capacitor for long-term usage when faced with environmental stress. Embodiments may implement reduced entryways in the termination patterns of the capacitor to decrease damage potential due to exposure of moisture. Embodiments may implement structures that decrease interfaces with different physical characteristics, which may lead to a reduction in the formation of micro-fractures during regular usage. Methods of manufacture for the features that improve reliability are also detailed.

Abstract: An antenna structure (GPS antenna) includes a plate-shaped conductor element (antenna electrode), a plate-shaped element (circuit board) including a ground conductor portion disposed so as to overlap the conductor element in plan view, and a skeletal resin frame for frequency adjustment disposed between the conductor element and the ground conductor portion.

Abstract: A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on an external surface of the ceramic body, wherein the dielectric layer contains a barium titanate-based powder particle having a core-shell structure including a core and a shell around the core, the shell having a structure in which titanium is partially substituted with an element having the same oxidation number as that of the titanium in the barium titanate-based powder particle and having an ionic radius different from that of the titanium in the barium titanate-based powder particle, and the shell covers at least 30% of a surface of the core.

Abstract: A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on an external surface of the ceramic body, wherein the dielectric layer contains a barium titanate-based powder particle having a core-shell structure including a core and a shell around the core, the shell having a structure in which titanium is partially substituted with an element having the same oxidation number as that of the titanium in the barium titanate-based powder particle and having an ionic radius different from that of the titanium in the barium titanate-based powder particle, and the shell covers at least 30% of a surface of the core.

Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the pair external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and thicknesses of the first internal electrode and the second internal electrode are 0.2 ?m or greater.

Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing the base metal and a ceramic material mainly composed of barium titanate; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and an atomic concentration ratio of Mg to Ti is 0 or greater and less than 0.002 in the dielectric layer.

Abstract: A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on an external surface of the ceramic body, wherein the dielectric layer contains a barium titanate-based powder particle having a core-shell structure including a core and a shell around the core, the shell having a structure in which titanium is partially substituted with an element having the same oxidation number as that of the titanium in the barium titanate-based powder particle and having an ionic radius different from that of the titanium in the barium titanate-based powder particle, and the shell covers at least 30% of a surface of the core.

Abstract: A multi-layer ceramic capacitor has a laminate of dielectric layers and internal electrode layers laminated alternately with one another, as well as cover layers formed as the outermost layers at the top and bottom of the laminate in the laminating direction, wherein the dielectric layers are constituted by a sintered compact containing a barium titanate and a silicon compound, and a fresnoite phase having an average grain size of 1 ?m or less is present in the dielectric layers.

Abstract: The present invention relates to a dielectric ceramic composition which is complex oxides represented by the following formula (1), {[(BisNat)a(BiuKv)bBac]1-dAd}xTi1-dNbdO3 (1), wherein, in formula (1), A represents at least one element selected from the group consisting of Li, Na and K, and a, b, c, d, s, t, u, v and x are numbers respectively satisfying the following formulae, 0.10?a?0.95, 0.00<b?0.85, 0.05?c?0.70, a+b+c=1, 0.10?d?0.50, 0.90?s+u?1.00, 0.45?t?0.50, 0.45?v?0.50 and 0.95?x?1.05.

Abstract: To provide a dielectric ceramic composition having a high dielectric constant, i.e., 3,000 or more, at elevated temperatures at or above 150° C. and having a practically sufficient relative dielectric constant at an applied DC electric field of 2 V/?m, and to provide a dielectric device including such a dielectric ceramic composition, a dielectric ceramic composition is a composite oxide represented by formula (1): {[(BisNat)a(BiuKv)bBac]1-dNad}xTi1-dNbdO3??(1) where a, b, c, d, s, t, u, v, and x are numbers satisfying the following conditions: 0.20?a<0.95 0.00<b?0.50 if 0.20<a<0.70, b<(1.20?a)/2 0.05?c<0.60 if 0.20<a<0.70, c>(0.80?a)/2 a+b+c=1 0.02?d<0.10 0.90?s+u?1.00 0.45?t?0.50 0.45?v?0.50 0.95?x?1.05.

Abstract: A dielectric composition may include a first dielectric powder; and a second dielectric powder having an average grain size smaller than that of the first dielectric powder and included in the dielectric composition in an amount of 0.01 to 1.5 parts by weight based on 100 parts by weight of the first dielectric powder, and a multilayer ceramic capacitor formed using the same. A multilayer ceramic capacitor may include: a ceramic body including dielectric layers; first and second internal electrodes disposed in the ceramic body to face each other with the respective dielectric layers interposed therebetween; and first and second external electrodes electrically connected to the first and second internal electrodes, respectively. The dielectric layers are formed of a dielectric composition including a first dielectric powder and a second dielectric powder having an average grain size smaller than that of the first dielectric powder and included in the dielectric composition in an amount of 0.01 to 1.

Abstract: A dielectric ceramic composition may include: a base powder represented by BaTiO3 and accessory components. In an XRD measurement of a dielectric material in which the base powder and the accessory components are sintered, when a (1, 1, 0) plane peak of a BaTiO3 crystal phase is converted into 1.00, a secondary phase peak of pyrochlore (RE2Ti2O7) (RE is a rare earth element) at about 30.5 degrees, as compared with the (1, 1, 0) plane peak, is 0.01 or less.

Abstract: A glass ceramic composition that contains a first ceramic including at least one of MgAl2O4 and Mg2SiO4; a second ceramic including BaO, RE2O3 (RE is a rare-earth element), and TiO2; glass containing each of 44.0 to 69.0 weight % of RO (R is an alkaline-earth metal), 14.2 to 30.0 weight % of SiO2, 10.0 to 20.0 weight % of B2O3, 0.5 to 4.0 weight % of Al2O3, 0.3 to 7.5 weight % of Li2O, and 0.1 to 5.5 weight % of MgO; and MnO.

Abstract: A dielectric ceramic that contains, as its main constituent, main-phase grains including a perovskite-type compound containing Ba, Ca, and Ti; first heterogeneous-phase grains containing Ca, a rare-earth element, and Si; and second heterogeneous-phase grains containing no Ca and containing the rare-earth element and Si. The second heterogeneous-phase grains are present in the dielectric ceramic in a ratio of 0.05 or less (including 0) of the number of the second heterogeneous-phase grains to the total of the first heterogeneous-phase grains and the second heterogeneous-phase grains. In the first heterogeneous-phase grains, the content of Ca is preferably 8% or more in terms of molar ratio with respect to the total content of Ca, the rare-earth element, and Si.

Abstract: There are provided a dielectric composition and a multilayer ceramic electronic component manufactured using the same, the dielectric composition including a dielectric grain having a perovskite structure represented by ABO3, wherein, when an imaginary line is drawn in a direction from a center of the dielectric grain to a grain boundary thereof, a content of rare earth elements in a region corresponding to 0.75 to 0.95% of the dielectric grain from the center of the dielectric grain may be 0.5 to 2.5 at %, based on 100 at % of a B-site ion, so that the multilayer ceramic electronic component manufactured using the dielectric composition can have excellent reliability and secure a high dielectric constant.

Abstract: A framework for developing high quality factor (Q) material for electronic applications in the radio frequency range is provided. In one implementation, ceramic materials having a tungsten bronze crystal structure is modified by substituting one or more elements at one or more lattice sites on the crystal structure. The substitute elements are selected based on the ionic radius and other factors. In other implementations, the modified ceramic material is prepared in combination with compositions such as rutile or a perovskite to form a orthorhombic hybrid of perosvkite and tetragonal tungsten bronze.

Abstract: There is provided a dielectric composition, including: a base powder including BamTiO3, where 0.995?m?1.010; a first subcomponent including 0.1 to 1.0 at % (x) of an oxide or carbonate containing at least one variable-valence acceptor element based on 100 moles of the base powder; a second subcomponent including 0.01 to 3.0 at % (y) of an oxide or carbonate containing at least one fixed valence acceptor element; a third subcomponent including an oxide or carbonate containing cerium (z) at % and at least one other rare-earth element (w) at %, where 0.01?z?x+4y and 0.01?z+w?x+4y; a fourth subcomponent including at least one of an oxide or carbonate containing at least one of Barium, Calcium, Aluminum, and Silicon and glass containing silicon; and a fifth subcomponent including 0.01 to 10.0 at % of an oxide containing zirconium.

Abstract: A dielectric ceramic whose primary component is an ABO3 compound (A contains Ba and B contains Ti) has a per-layer thickness of approx. 0.5 ?m or less, where the volume ratio to all dielectric sintered grains of those whose grain size is in a range of 0.02 ?m to 0.15 ?m is adjusted to a grain size distribution of 1% to 10%. High dielectric constant and high reliability can be achieved at the same time with the dielectric ceramic.

Abstract: There is provided a dielectric composition for low-temperature sintering including BaTiO3 as a main ingredient, and xB2O3-(1-x)BaOas an accessory ingredient, wherein x ranges from 0.25 to 0.8, and the content of the accessory ingredient ranges from 0.1 to 2.00 mol %, based on 100 mol % of the main ingredient.

Abstract: A dielectric ceramic composition for multilayer ceramic capacitor (MLCC) includes a first component of 91 to 98 wt % and a second component of 2 to 9 wt %, wherein the first component includes a main component BaTiO3 of 94 to 98 wt %, a first subcomponent of 0.5 to 2 wt % including a glass powder having a network structure, and a second subcomponent of 1 to 4 wt % including at least one of MgO, Cr2O3 and Mn3O4, and the second component includes (Ba1-y-xCaySrx)(ZryTi1-y)O3, and x satisfies 0.2?x?0.8 and y satisfies 0.03?y?0.15.

Abstract: Dielectric compositions that include compound of the formula [(M?)1?x(A?)x][(M?)1?y?z,(B?)y(C?)z]O3??(VO)? and protonated dielectric compositions that include a protonated dielectric compound within the formula [(M?)1?x(A?)x](M?)1?y?z(B?)y(C?)z]O3??+h(Vo)?(H•)2h are disclosed. Composite materials that employ one or more of these dielectric compounds together with an electrolyte also are disclosed. Composite material that employs one or more of these dielectric compounds together with an electrochemally active material also are disclosed.

Abstract: A laminated ceramic capacitor has multiple layered dielectric ceramic layers of a dielectric ceramic constituted by primary phase grains whose primary component is BaTiO3, secondary phase grains containing at least Re (Re represents at least one of Eu, Gd, Dy, Ho, Er, Yb, and Y), Ba, and Ti, and grain boundary phase containing at least one of B and Li or both; and internal electrodes which are made of Cu or Cu alloy. When a thickness of the dielectric ceramic layer is given by t, and when grain sizes at cumulative 20%, cumulative 50%, and cumulative 95% points of a cumulative count distribution of the primary phase grains are given by D20, D50, and D95, respectively, D20?D50×70%, D50?t/4, D95?t/2, and CV value ((standard deviation between D20 and D95)/D50)<40% are satisfied.

Abstract: An insulator for spark plug with a main constituent of alumina and containing silicon includes a grain boundary phase positioned between alumina particles. The grain boundary phase contains: a group 2A element; a rare earth element; and at least one kind of zirconium, titanium, chrome, niobium, manganese, and iron (a first element). Assuming that a total amount of the rare earth element is X (mass %), a total amount of the group 2A element is Y (mass %), and a total amount of the first element is Z (mass %), the following are met: 0.40?Y/X?2.00 0.10?Z/X?0.40.

Abstract: A dielectric composition includes a base main component including Ba and Ti and an accessory component, wherein a ratio of domain width/grain size of the dielectric composition is in the range of 0 to 0.2, a multilayer ceramic capacitor using the same, and a method for manufacturing a multilayer ceramic capacitor. It is possible to provide a dielectric composition that can implement a higher dielectric constant and good high temperature withstand voltage characteristics in the same grain size condition. It is expected that this effect can be effectively applied to the development of ultra high capacity MLCCs having a thin dielectric by implementing the same capacity while increasing the thickness of the dielectric than the case of applying the conventional dielectric material.

Abstract: A ceramic electronic component includes a first dielectric layer, a second dielectric layer, and a boundary reaction layer. The first dielectric layer is a layer containing BaO, Nd2O3, and TiO2, the second dielectric layer is a layer containing a material different from the material of the first dielectric layer, and the boundary reaction layer is a layer formed between the first dielectric layer and the second dielectric layer and containing at least one of Zn, Ti, Cu, and Mg.

Abstract: A piezoelectric ceramic that includes barium titanate and 0.04 mass % or more and 0.20 mass % or less manganese relative to barium titanate. The piezoelectric ceramic is composed of crystal grains. The crystal grains include crystal grains A having an equivalent circular diameter of 30 ?m or more and 300 ?m or less and crystal grains B having an equivalent circular diameter of 0.5 ?m or more and 3 ?m or less. The crystal grains A and the crystal grains B individually form aggregates and the aggregates of the crystal grains A and the aggregates of the crystal grains B form a sea-island structure.

Abstract: A dielectric ceramic that includes a sintered body of BaTiO3 based ceramic grains, in which the ceramic grains each include a shell part as a surface layer part and a core part inside the shell part. The ceramic grains contain, as accessory constituents, R (R, which is a rare-earth element, is at least one selected from the group consisting of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Y) and M (M is at least one selected from the group consisting of Mg, Mn, Ni, Co, Fe, Cr, Cu, Al, Mo, W, and V). R and M are present in the shell part of the ceramic grain, and concentrations of R and M contained in the shell part are increased from a grain boundary toward the core part.

Abstract: A dielectric ceramic composition includes a component represented by composition formula {?(xBaO.yNd2O3.zTiO2)+?(2MgO.SO2)} as a main component and zinc oxide, boron oxide, and a glass having a softening point equal to or lower than a certain temperature as minor components with respect to the main component. In the dielectric ceramic composition, x, y, and z that respectively represent molar ratios of BaO, Nd2O3, and TiO2 are in certain ranges and ? and ? that represent volume ratios of subcomponents (xBaO.yNd2O3.zTiO2 and 2MgO.SiO2) in the main component are in certain ranges. When the minor components are respectively represented by aZnO, bB2O3, and cglass, a, b, and c that represent mass ratios of the respective minor components to the main component are in certain ranges.

Abstract: A dielectric ceramic composition includes: a base material powder BamTiO3 (0.995?m?1.010); 0.2 to 2.0 moles of a first accessory ingredient, an oxide or carbide containing at least one of Ba and Ca, based on 100 moles of the base material powder; a second accessory ingredient, an oxide containing Si or a glass compound containing Si; 0.2 to 1.5 moles of a third accessory ingredient, an oxide containing at least one of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, based on 100 moles of the base material powder; and 0.05 to 0.80 mole of a fourth accessory ingredient, an oxide containing at least one of Cr, Mo, W, Mn, Fe, Co, and Ni, based on 100 moles of the base material powder, a content ratio of the first accessory ingredient to the second accessory ingredient being 0.5 to 1.7.

Abstract: The invention provides a modified perovskite type composite oxide in which the particle surface of a perovskite type composite oxide is coated with a first component of at least one selected from TiO2 and SiO2 and a second component of at least one selected from a group consisting of Al, Zr, Nd, La, Ce, Pr, and Sm, wherein the coating is formed by hydrolyzing at least one selected from a hydrolyzable TiO2 precursor and a hydrolyzable SiO2 precursor as a source of the first component and a salt of at least one selected from a group consisting of Al, Zr, Nd, La, Ce, Pr, and Sm as a source of the second component, and then calcining them.

Abstract: A dielectric ceramic composition that contains, as its main constituent, (Ba1-x-yCaxSry)(Ti1-z-wZrzHfw)O3 (in the formula, 0?x+y?0.2, 0?z+w?0.1), and contains CuO and Bi2O3, and the dielectric ceramic composition has a feature that the total content of the CuO and Bi2O3 is 10 parts by weight or more with respect to 100 parts by weight of the main constituent, and the molar ratio CuO/(CuO+Bi2O3) is 0.5 or less.

Abstract: A dielectric ceramic that contains, as its main constituent, a perovskite-type compound containing Ba and Ti, and, with respect to the Ti content of 100 parts by mole, contains Re1 (Re1 is at least one element of La and Nd) in the range of 0.15 to 3 parts by mole, Y in the range of 0.1 to 3 parts by mole, Mg in the range of 0.3 to 13 parts by mole, and Fe in the range of 0.01 to 5 parts by mole.

Abstract: A dielectric ceramic and a laminated ceramic capacitor using the dielectric ceramic are achieved which provide favorable thermal shock resistance without damaging properties or characteristics such as dielectric properties, insulation properties, temperature characteristics, and characteristics in high temperature loading, even when the dielectric layers are reduced in thickness and the number of stacked layers increased. The dielectric ceramic contains, as its main constituent, a barium titanate based compound represented by the general formula ABO3, and a crystalline oxide containing Al, Mg, and Si is present as secondary phase grains in the dielectric ceramic.

Abstract: A dielectric ceramic composition comprises barium titanate as a main component, and as subcomponents, 1.00 to 2.50 moles of an oxide of Mg, 0.01 to 0.20 mole of an oxide of Mn and/or Cr, 0.03 to 0.15 mole of an oxide of at least one element selected from a group consisting of V, Mo and W, 0.20 to 1.50 mole of an oxide of R1 where R1 is at least one selected from a group consisting of Y and Ho, 0.20 to 1.50 mole of an oxide of R2 where R2 is at least one selected from a group consisting of Eu, Gd and Tb and 0.30 to 1.50 mole of an oxide of Si and/or B, in terms of each oxide with respect to 100 moles of the barium titanate.

Abstract: A dielectric composition having a high dielectric constant, multi layered ceramic condensers comprising the same, and a method of preparing for multi layered ceramic condensers. The dielectric composition includes: a compound represented by general formula (Ba1-XCax)m(Ti1-yZry)O3 (0.995?m?1.010, 0.001?x?0.10, 0.001?y?0.20) as a main component; an Al oxide as a first sub-component; at least one metal selected from a group consisting of Mg, Sr, Ba, Ca, and Zr and the salt thereof, as a second sub-component; at least one metal selected from a group consisting of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu and the salt thereof, as a third sub-component; at least one metal selected from a group consisting of Cr, Mo, W, Mn, Fe, Co, and Ni and the salt thereof, as a fourth sub-component; and a fifth sub-component selected from Si containing glass forming compounds.

Abstract: A hexagonal type barium titanate powder comprising barium titanate as a main component shown by a generic formula of (Ba1-?M?)A(Ti1-?Ga?)BO3 and having hexagonal structure wherein; an effective ionic radius of 12-coordinated “M” is ?25% or more to +25% or less with respect to an effective ionic radius of 12-coordinated Ba2+, and said A, B, ? and ? satisfy relations of 0.975<(A/B)?1.015, 0.0015??<0.005, 0.075???0.15.

Abstract: A dielectric ceramic composition comprising a main component and at least one or more subcomponent elements has a dielectric particle and a grain boundary. The dielectric particle has a main component phase substantially composed of the main component, and a diffusive phase around the main component phase where at least one selected from the subcomponent elements is diffused, a local minimal value of Cs is located at an outside edge side with respect to a position of the local maximum value of Cs, and Cs is increased from a position of the local minimal value of Cs toward the outside edge, when the dielectric particle is cut on an arbitrary cutting plane including the main component phase, and Cs is defined as a concentration of one or more elements selected from the subcomponent elements in an arbitrary position in the dielectric particle.

Abstract: A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on an external surface of the ceramic body, wherein the dielectric layer contains a barium titanate-based powder particle having a core-shell structure including a core and a shell around the core, the shell having a structure in which titanium is partially substituted with an element having the same oxidation number as that of the titanium in the barium titanate-based powder particle and having an ionic radius different from that of the titanium in the barium titanate-based powder particle, and the shell covers at least 30% of a surface of the core.