Abstract: The present invention aims to provide an electronic component capable of reducing the occurrence of cracks at the joining portion to a board etc. A capacitor 1 (laminated ceramic capacitor) being one example of the electronic component is provided with an element assembly 10 (ceramic) and a pair of external electrodes 20 formed on both side surfaces of the element assembly 10. In the element assembly 10, a dielectric layer 12 and an internal electrode 14 are laminated alternately. The external electrode 20 has such constitution that a first electrode layer connected with the internal electrode, a second electrode layer (electroconductive resin layer) including a hardened product of thermohardening resin containing a polyphenol compound having a side chain composed of an aliphatic group, a third electrode layer composed of Ni and a fourth electrode layer composed of Sn are formed in this order from the element assembly side.

Abstract: Dielectric ceramic having a high dielectric constant of 5,500 or more and exhibiting good dielectric constant temperature characteristic, and a small, high-capacitance monolithic ceramic capacitor having an electrostatic capacitance temperature characteristic satisfying the X5R characteristic are provided. The dielectric ceramic includes a BaTiO3 based or (Ba,Ca)TiO3 based primary component, a rare-earth element and Cu, and has a structure composed of crystal grains and grain boundaries between the crystal grains.

Abstract: A nonreducing dielectric ceramic comprising a (Sr, Ca)(Ti, Zr)O3-based perovskite principal crystal phase containing 55 mole percent or more of SrTiO3 and whose powder CuK? X-ray diffraction pattern exhibits a ratio of less than 5% of the maximum peak intensity of the accessory crystal phases being the other crystal phases to the intensity of the maximum peak of the perovskite crystal phase, which is present at 2?=25° to 35°. This strontium titanate-based nonreducing dielectric ceramic has a high relative dielectric constant of 150 or more, a low third-order harmonic distortion ratio, and an excellent reliability in a high temperature-loading test. Accordingly, it is advantageously used for forming dielectric ceramic layers of a monolithic ceramic capacitor.

Abstract: A dielectric porcelain composition of the present invention includes a first component and second component. If the first component is represented by the general formula of xBaO—yNd2O3-zTiO2-wBi2O3 (provided that x+y+z+w=100), x, y, z, and w satisfy 12?x?16, 12?y?16, 65?z?69, and 2?w?5, respectively. The second component includes 30 to 37 wt % of BaO, 33 to 46 wt % of SiO2, 8 to 12 wt % of La2O3, 3 to 7 wt % of Al2O3, 0 to 1 wt % of SrO, 0 to 10 wt % of Li2O, 0 to 20 wt % of ZnO, and 7 wt % or less of B203. The compounding ratio of the second component is between 10 wt % and 30 wt % when the sum of the first and second components is 100. In addition, 0.1 to 1 parts by weight of Li2O and 3 to 10 parts by weight of ZnO, relative to 100 parts by weight of the sum of the first and second components, is also contained as a third component. An average particle diameter of the dielectric mixed powder forming dielectric porcelain composition before firing is 0.9 ?m or less.

Abstract: The present invention provides a dielectric ceramic composition, which is, in addition to having superior resistance to reduction during firing, superior capacitance temperature characteristics after firing and superior dielectric characteristics, also demonstrates an enhanced lifetime for insulation resistance. The present invention is a dielectric ceramic composition comprising 0.18 to 0.5 part by weight of Yb2O3, 0.6 to 1.5 parts by weight of MgO, 0.4 to 1.5 parts by weight of CaSiO3, 0.02 to 0.2 part by weight of WO3, 0.1 to 0.4 part by weight of MnCO3 and 0.02 to 0.2 part by weight of MoO3 based on 100 parts by weight of (BaO)m.TiO2 (wherein, m is from 0.990 to 0.995).

Abstract: The present invention provides a dielectric porcelain composition comprising 100 parts by weight of a barium titanate-based dielectric material and 4 to 10 parts by weight in total of Bi2O3 and at least one compound selected from the group of consisting of CuO, ZnO and MgO.

Abstract: A multi-layer ceramic capacitor includes a plurality of dielectric ceramic layers; internal electrodes formed between the dielectric ceramic layers; and end termination electrodes electrically connected to the internal electrodes, wherein the dielectric ceramic layer is a sintered body constituted of a primary component that, when it is expressed by ABO3+aRe2O3+bMnO, satisfies 1.000?A/B?1.035, 0.05?a?0.75 and 0.25?b?2.0; and a subcomponent that includes at least one kind of B, Li or S in the range of 0.16 to 1.6 parts by mass in total in terms of B2O3, Li2O and SiO2; and the internal electrode is constituted of Cu or a Cu alloy.

Abstract: A dielectric material is provided. The dielectric material includes a main composition including a Ba2Ti9O20 having a weight ranged from 50 to 94.9 wt %; a first sub-composition including a GeO2 and an MnCO3 respectively having a weight ranged from 0.01 to 10 wt %; and a second sub-composition including a glass additive composed of a B2O3, a ZnO, a SiO2 and at least one of a CuO, a CaCO3 and a BaCO3, wherein the glass additive has a weight ranged from 5 to 40 wt %.

Abstract: A multi-layer ceramic capacitor having temperature characteristics capable of satisfying X8R characteristics and having a high specific resistance in a high temperature environment and dielectric ceramics used in the capacitor, the dielectric ceramics containing, as a main ingredient, a compound represented by: (Bi0.5Na0.5)xBa1-xTiO3 in which x is from 0.05 to 0.2 and containing, from 0.25 mol to 1.50 mol of at least one rare earth metal selected from Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Y based on 100 mol of the main ingredient, from 0.20 mol to 1.5 mol of Mg based on 100 mol of the main ingredient, and from 0.03 mol to 0.60 mol of at least one metal selected from V, Cr, and Mn based on 100 mol of the main ingredient.

Abstract: A dielectric ceramic composition comprises a main component including BaTiO3, a first subcomponent including BaZrO3, a second subcomponent including an oxide of Mg, a third subcomponent including an oxide of rare earth, a fourth subcomponent including an oxide of at least one element selected from Mn, Cr, Co and Fe, and a fifth subcomponent including an oxide of at least one element selected from Si, Al, Ge, B and Li. At least a part of dielectric particles constituting the dielectric ceramic composition comprises a surface diffusion structure comprised of a central layer and a diffusion layer therearound. CR and CRmax, respectively defined as a concentration of said “R” in a proximity point to a boundary face of the dielectric particle and a maximum concentration of the “R” in the diffusion layer, satisfy a relation of CRmax/CR>1.

Abstract: A ceramic electronic device including a dielectric layer, wherein the dielectric layer includes a main component expressed by a composition formula of Bam TiO2+m, wherein “m” satisfies 0.995?m?1.010 and a ratio of Ba and Ti satisfies 0.995?Ba/Ti?1.010, and a subcomponent (a sixth subcomponent) including an oxide of Al; and a content of the Al compound is 0 to 4.0 moles (note that 0 is not included) in terms of Al2O3 with respect to 100 moles of the main component; and preferably, the dielectric layer includes a segregation phase, and the segregation phase includes an oxide of Al.

Abstract: A dielectric ceramic composition comprising a main component including Ba, Ca and Ti and having a perovskite crystal structure expressed by a general formula ABO3 and a fourth subcomponent including a compound of Zr; wherein a content of the fourth subcomponent with respect to 100 moles of the main component is larger than 0 mole and smaller than 5 moles in terms of Zr and, preferably, a segregation phase including the compound of Zr is provided.

Abstract: A translucent ceramic having a high light transmittance is provided. It contains a perovskite compound having a composition represented by a general formula: (Ba1-s-tSrsCat)(MxB1yB2z)vOw (where M contains at least one of Sn, Zr and Hf, B1 represents at least one of Mg, Zn, Y and In, B2 represents at least one of Ta and Nb, each of conditions of 0?s?0.99, 0.01?t?0.45, x+y+z=1, 0<x?0.9, 1.00?z/y?2.40, and 0.97?v?1.05 is satisfied, and w represents a positive number for maintaining electrical neutrality) as a primary component. This translucent ceramic can be used as, for example, an objective lens (2) of an optical pickup (9) to provide advantages. In another aspect some of M is replaced by Ti.

Abstract: A dielectric ceramic material comprising the composition: 100(Ba1-xCax)mTiO3+aMnO+bCuO+cSiO2+dMgO+eRO (wherein coefficients 100, a, b, c, d, and e each represent mols; m represents the molar ratio of (Ba1-xCax) to Ti; and RO represents at least one rare-earth element oxide selected from Y2O3, La2O3, 2CeO2, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3 and Lu2O3), wherein m, x, a, b, c, d, and e satisfy the relationships: 0.998?m?1.030, 0.04?x?0.15, 0.01?a?5, 0.05?b?5, 0.2?c?8, 0.05?d?3.0, and 0.05?e?2.5, and the dielectric ceramic material has an average grain size of 0.3 ?m to 0.7 ?m, is used to make reliable multilayer ceramic capacitors including dielectric ceramic layers each having a small thickness of about 1 ?m.

Abstract: A dielectric ceramic composition containing at least 0.15 to 2.5 mol of a Mg compound in terms of MgO, 0 to 1.6 mol of a Ba compound in terms of BaCO3, 0.1 to 3.0 mol of a Ln (Ln includes two or three kinds of elements selected from Er, Dy, and Ho with Er being essential) compound in terms of Ln2O3, 0.01 to 0.4 mol of a Mn compound in terms of MnO4/3, 0.01 to 0.26 mol of a V compound in terms of V2O5, 0.3 to 3.5 mol of a Si compound in terms of SiO2, and 0.01 to 2.5 mol of an Al compound in terms of Al2O3 to 100 mol of barium titanate adjusted for a Ba/Ti molar ratio of 0.997 to 1.007.

Abstract: Crystal grains mainly composed of barium titanate have a mean grain size of not more than 0.2 ?m. The volume per unit cell V that is represented by a product of lattice constant (a, b, c) figured out from the X-ray diffraction pattern of the crystal grains is not more than 0.0643 nm3. Thereby, a dielectric ceramics having high relative dielectric constant can be obtained. A multilayer ceramic capacitor comprises a capacitor body and an external electrode that is formed at both ends of the capacitor body. The capacitor body comprises dielectric layers composed of the dielectric ceramics, and internal electrode layers. The dielectric layers and the internal electrode layers are alternately laminated.

Abstract: A multi-layer ceramic capacitor has a temperature characteristic satisfying an X8R property and has a high specific resistance under a high temperature circumstance, in which the dielectric ceramic composition forming the dielectric ceramics is expressed by a formula: BaTiO3+aMgO+bMOx+cReO3/2+dSiO2, wherein MgO represents MgO conversion, MOx represents oxide conversion for 1 atom in 1 molecule of at least one metal selected from V, Cr, and Mn, ReO3/2 represents oxide conversion for 1 atom in 1 molecule of at least one rare earth metal selected from Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Y, and SiO2 represents SiO2 conversion, and wherein 0.4?a?3.0 mol, 0.05?b?0.4 mol, 6.0?c?16.5 mol, 3.0?d?5.0 mol, 2.0?c/d?3.3, based on 100 mol of BaTiO3.

Abstract: A dielectric ceramic composition comprising a predetermined main component and a fifth subcomponent including an oxide of A (note that A is at least one king selected from a cation element group having an effective ionic radius of 0.065 nm to 0.085 nm at the time of 6 coordination); and the dielectric ceramic composition comprises a plurality of crystal grains including Ca elements and, when assuming that an average value of a concentration of entire Ca exiting in said respective crystal grains is grain Ca concentration, at least unevenness exists in said grain Ca concentration between said crystal grains and it is 5% or higher in a CV value.

Abstract: A dielectric ceramic composition of the present invention includes 100 parts by mole of BaTiO3, x1 parts by mole of MnO, x2 parts by mole of Cr2O3, x3 parts by mole of Y2O3 and/or Ho2O3, x4 parts by mole of oxide selected from the group consisting of BaO, CaO and SrO, and x5 parts by mole of SiO2 and/or GeO2, where 0.5?x1?4.5, 0.05?x2?1.0, x1+x2?4.55, 0.25?x3?1.5, 0.5 ?x4?6 and 0.5?x5?6. A multilayer ceramic capacitor of the present invention includes a laminated structure of a ceramic dielectric made of such a composition and an electrode made of Ni or Ni alloy.

Abstract: A highly reliable ceramic electronic device having an excellent temperature characteristic of a capacitance and a low IR temperature dependency, comprising a dielectric layer: wherein the dielectric layer includes a main component expressed by a composition formula of BamTiO2+m, wherein “m” satisfies 0.995?m?1.010 and a ratio of Ba and Ti satisfies 0.995?Ba/Ti?1.010, and, as subcomponents, an oxide of Al and an oxide of Si or an oxide of R (note that R is at least one kind selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu); and includes a secondary phase composed of at least a part of the oxide of Al and at least a part of the oxide of Si or the oxide of R and being different from a main phase mainly composed of the main component; and the production method are provided.

Abstract: This invention provides the three novel La,Fe, La,Cr and Sm,Fe substituted barium titanate solid solution ferroelectric compositions with the formula Ba1-xLnxTi1-xMxO3 wherein when Ln is La, M is Fe or Cr, when Ln is Sm, M is Fe and x is from about 0.02 to about 0.06 and mixtures thereof, the novel La,Fe substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1-ySry)1-xLaxTi1-xFexO3 wherein y is greater than zero and less than about 0.6 and x is from about 0.01 to about 0.06 and the novel La,Al substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1-ySry)1-xLaxTi1-x/4-3a/4Ala(x-a)/4O3 wherein denotes a vacancy, y is greater than zero and less than about 0.6, a is from about 0.01 to about 0.06 and x is from 0.02 to about 0.10 with the proviso that x is greater than or equal to a.

Abstract: A production method of a dielectric ceramic composition comprising a main component including a compound having a perovskite-type crystal structure expressed by a general formula ABO3 (note that “A” is Ba alone or a composite of Ba and Ca, and “B” is Ti alone or a composite of Ti and Zr), and a fourth subcomponent including an oxide of R (note that R is at least one selected from Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb and Lu); comprising steps of dividing a material of the main component to a first main component material and a second main component material, obtaining a post-reaction material by bringing the material of the first main component to react in advance with a part of the fourth subcomponent material to be included in the dielectric ceramic composition, and adding the material of the second main component and rest of the fourth subcomponent material to be included in the dielectric ceramic composition into the post-reaction material; wherein, when assuming that number of moles o

Abstract: A production method of a dielectric ceramic composition comprising a main component including a compound having a perovskite-type crystal structure expressed by a composition formula (Ba1-xCax) (Ti1-yZry)O3 (note that 0?x?0.2, 0?y?0.2), and a fourth subcomponent including an oxide of R (note that R is at least one selected from Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu); comprising steps of obtaining a post-reaction material by bringing a material of the main component to react in advance with a part of a material of the fourth subcomponent to be included in the dielectric ceramic composition, and adding rest of material of the fourth subcomponent to be included in the dielectric ceramic composition into the post-reaction material. According to the present invention, both of a dielectric ceramic composition capable of improving the specific permittivity and a temperature characteristic of capacitance can be preferable, and the production method can be provided.

Abstract: The production of low-loss, tunable composite ceramic materials with improved breakdown strengths is disclosed. The composite materials comprise ferroelectric perovskites such as barium strontium titanate or other ferroelectric perovskites combined with other phases such as low-loss silicate materials and/or other low-loss oxides. The composite materials are produced in sheet or tape form by methods such as tape casting. The composite tapes exhibit favorable tunability, low loss and tailorable dielectric properties, and can be used in various microwave devices.

Abstract: A translucent ceramic principally contains a composition represented by the formula Ba{Tix1Mx2(Mg1-tZnt)y(Ta1-uNbu)z}vOw, wherein M is at least one selected from the group consisting of Sn, Zr, and Hf; w is a positive number for maintaining the electrical neutrality; x1+x2+y+z=1; 0.015?x1+x2?0.90; 0<x1?0.90; 0?x2?0.60; 1.60?z/y?2.40; 1.00?v?1.05; 0<t<1; and 0?u?1. The translucent ceramic has high linear transmittance over a wide wavelength range and a large refractive index, is controllable in refractive index and Abbe number in a wide range, and is not birefringent. Therefore, lenses (2) made of the translucent ceramic are suitable for optical pickups (9) and other devices that must be small-sized and thin.

Abstract: The dielectric ceramic has a composition represented by general formula 100(Ba1-x-ySrxCay)m(Ti1-zZrz)O3+aBaO+bR2O3+cMgO+dMnO+eCuO+fV2O5+gXuOv (where R is a rare-earth element such as La, Ce or Pr; and XuOv is an oxide group including at least Si); and 0?x?0.05, 0?y?0.08 (preferably 0.02?y?0.08), 0?z?0.05, 0.990?m, 100.2?(100 m+a)?102, 0.05?b?0.5, 0.05?c?2, 0.05?d?1.3, 0.1?e?1.0, 0.02?f?0.15, and 0.2?g?2. With this composition, a monolithic ceramic capacitor retaining good dielectric characteristics and temperature characteristics even if a high field strength voltage is applied by further thinning the dielectric layers thereof and having excellent reliability achieving good isolating property, dielectric strength, and high-temperature load life is obtained.

Abstract: A dielectric ceramic composition contains a substance represented by general formula 100(Ba1?xCax)mTiO3+aMnO+bCuO+cROn (wherein the coefficients 100, a, b, and c each represent mols; R represents at least one element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and n represents a number determined by the valence of the rare-earth element R and is a positive number required for maintaining electroneutrality) and a sintering aid. The dielectric ceramic composition satisfies the relationships 0.990?m?1.050; 0.01?x?0.20; 0.5?a?3.5; 0.1?b?5.0; and 10?c?20, and the amount of the sintering aid represented by d in terms of parts by weight per 100 parts by weight of the compound represented by (Ba1?xCax)mTiO3 satisfies 0.8?d?5.0 Furthermore, VO3/2 may be added to increase the breakdown field.

Abstract: A dielectric material is provided. The dielectric material includes a main composition including a Ba2Ti9O20 having a weight ranged from 50 to 94.9 wt %; a first sub-composition including a GeO2 and an MnCO3 respectively having a weight ranged from 0.01 to 10 wt %; and a second sub-composition including a glass additive composed of a B2O3, a ZnO, a SiO2 and at least one of a CuO, a CaCO3 and a BaCO3, wherein the glass additive has a weight ranged from 5 to 40 wt %.

Abstract: A dielectric ceramic composition includes a main component including a dielectric oxide expressed by a composition formula of {(Ca1-xSrx)O}m.(Zr1-yTiy)O2, wherein m, x and y indicating composition mole ratios in the composition formula are in relationships of 0.8?m?1.3, 0x?1.00 and 0.1?y?0.8; a first subcomponent including a V oxide; and a second subcomponent including an Al oxide; wherein ratios of respective components with respect to 100 moles of said main component are the first subcomponent: 0 mole<first subcomponent<7 moles (wherein the value is a V oxide value in terms of V2O5); and the second subcomponent: 0 mole<second subcomponent<15 moles (wherein the value is an Al oxide value in terms of Al2O3).

Abstract: A dielectric ceramic composition, comprising a main component including barium titanate; a first subcomponent including at least one kind selected from MgO, CaO, BaO and SrO; a second subcomponent functioning as a sintering auxiliary agent; a third subcomponent including at least one kind selected from V2O5, MoO3 and WO3; a fourth subcomponent including an oxide of R1 (note that R1 is at least one kind selected from Sc, Er, Tm Yb and Lu); a fifth subcomponent including CaZrO3 or CaO+ZrO2; and an eighth subcomponent including an oxide of A (note that A is at least one kind selected from a cation element group having an effective ionic radius at the time of 6 coordination of 0.065 nm to 0.085 nm); wherein a ratio of the eighth subcomponent with respect to 100 moles of the main component is 0 to 4 moles (note that 0 mole and 4 moles are excluded, and the value is in terms of an A oxide).

Abstract: The composite dielectric of the present invention contains an aromatic liquid crystal polyester and a dielectric ceramic powder arranged in the aromatic liquid crystal polyester, wherein the dielectric ceramic powder exhibits a Q value greater than 650 at a frequency of 1 GHz by perturbation. A wiring board comprising a composite dielectric sheet made of a composite dielectric having such a characteristic exhibits a high dielectric constant and a low dielectric dissipation factor, thereby yielding less transmission loss, and thus can favorably be used in electronic instruments driven in high-frequency regions.

Abstract: The present invention relates to a low-temperature sintered barium titanate microwave dielectric ceramic material. The host matrix thereof can be represented by BaxTiyMzOx+2y+k, where x is 1˜6, y is 1˜17, z is 0˜1, k is 0˜3, M is an element substituting the Ba or Ti ion, for example selected from an alkali metal, an alkaline-earth metal, a transition group or a rare earth group, and preferably Ba2Ti9O20 or the host matrix containing Zr, Sn, Zn, etc. According to the present invention, a low melting glass is added and a subsequent milling operation is performed to reduce the sintering temperature of the microwave dielectric ceramic material to less than 1,000° C. The low melting glass can be for example the Ba—B—Si—Li glass, Ba—B—Zn—Si—Li glass, Ba—B—Si—Li—Cu glass or Cu—B—Zn—Si—Li glass.

Abstract: A dielectric ceramic is obtained by the steps of obtaining a reaction product composed of a barium titanate base composite oxide represented by the general formula (Ba1?h?i?mCahSriGdm)k(Ti1?y?j?nZryHfjMgn)O3, in which 0.995?k?1.015, 0?h?0.03, 0?i?0.03, 0.015?m?0.035, 0?y<0.05, 0?j<0.05, 0?(y+j)<0.05, and 0.015?n?0.035 hold; mixing less than 1.5 moles of Ma (Ba or the like), less than 1.0 mole of Mb (Mn or the like), and 0.5 to 2.0 moles of Mc (Si or the like) with respect to 100 moles of the reaction product; and firing the mixture thus obtained. This dielectric ceramic has superior humidity resistance, satisfies the F characteristic of the JIS standard and the Y5V characteristic of the EIA standard, has a relative dielectric constant of 9,000 or more, and has superior high-temperature reliability.

Abstract: Provided is a dielectric ceramic composition represented by the chemical composition formula: 100 (Ba1?xCax)mTiO3+aMnO+bCuO+cSiO2+dRe2O3 (wherein coefficients 100, a, b, c, and d each represent a molar amount; and Re represents at least one element selected from Y, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb), wherein m, x, a, b, c, and d satisfy the respective relationships: 0.990?m?1.030, 0.04?x?0.20, 0.01?a?5, 0.05?b?5, 0.2?c?8, and 0.05?d?2.5.

Abstract: Multilayer ceramic chip capacitors which satisfy Y5V requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel, copper, and alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise BaTiO3 doped with other metal oxides such as MgO, CaO, ZnO, MnO2, ZrO2, SiO2, Nd2O3, Nb2O5, and Y2O3.

Abstract: A capacitor includes at least two pairs of opposing electrode layers and an intermediate dielectric layer. The intermediate dielectric layer includes a ceramic material that contains at least two different components existing in separate phases. The at least two different components have a perovskite structure that contains silver in A-positions and niobium and tantalum in B-positions. A composition of a first component and a composition of a second component are such that temperature coefficients of respective permittivities Tk?A and Tk?B have different signs within a temperature range.

Abstract: Disclosed herein is a method of manufacturing a multilayered ceramic capacitor by a spin coating process, and a multilayered ceramic capacitor obtained by the above method. The method of the current invention provides a plurality of dielectric layers formed by spin coating, in which the process of coating the dielectric layer and the process of printing the inner electrode can be provided as a single process. Therefore, the thickness of the dielectric layer is easily controlled while the dielectric layer is formed to be thin. Further, since the dielectric layers and the inner electrodes are formed successively, the processes of separating and layering the dielectric layers, and the process of compressing the ceramic multilayered body can be omitted. Thereby, the ceramic multilayered body need not be compressed, and thus, a pillowing phenomenon does not occur in the multilayered ceramic capacitor.

Abstract: The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the following steps of precipitation of barium titanyl oxalate (BaTiO(C2O4)2.4H2O) with spraying a mixture of an aqueous barium chloride (BaCl2.2H2O) and titanium tetrachloride (TiCl4) to an aqueous solution of oxalic acid, via a nozzle; wet pulverization by using a beads mill after adding an additive such as an amine; dry; pyrolysis; and re-pulverization.

Abstract: A production method of a dielectric ceramic composition having a step of firing dielectric material including a main component ingredient and a subcomponent ingredient, wherein said main component ingredient before firing is barium titanate ingredient powder having the perovskite type crystal structure expressed by ABO3, and a ingredient powder having a ratio A/B of A site components and B site components of 1.006?A/B?1.035 and the specific surface area of 8 to 50 m2/g is used. According to the invention, a dielectric ceramic composition having preferable electric characteristics and temperature characteristic can be provided even in the case of being composed of fine particle and a capacitor made to be a thin layer.

Abstract: A dielectric ceramic composition that includes a main component expressed as 100BamTiO3+xCuO+aROn+bMnO+cMgO (wherein coefficients 100, x, a, b, and c represent molar ratios; m represents the ratio of Ba to Ti (Ba/Ti); R represents at least one metal element selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; and n represents a positive number required to maintain electroneutrality and is determined by the valence number of R), wherein m, x, a, b, and c meet the following relationships: 0.990?m?1.050; 0.1?x?5.0; 9.0?a?20.0; 0.5?b?3.5; and 0<c?4.0, and the dielectric ceramic composition contains 0.8 to 5.0 parts by weight of a sintering additive with respect to 100 parts by weight of the main component.

Abstract: A method of production of a reduction resistant dielectric ceramic composition having a superior low frequency dielectric characteristic and further improved in accelerated lifetime of insulation resistance, specifically a method of production of a dielectric ceramic composition containing a main component including a dielectric oxide of a specific composition, a first subcomponent including a V oxide, a second subcomponent containing an Al oxide, a third subcomponent containing an Mn oxide, and a fourth subcomponent containing a specific sintering aid in a specific ratio, including a step of mixing at least part of the materials of the subcomponents excluding one or both of at least the material of the third subcomponent and material of the fourth subcomponent with the starting materials prepared for obtaining the material of the main component to prepare the pre-reaction material, a step of causing the prepared pre-reaction material to react to obtain a reacted material, and a step of mixing the materials o

Abstract: A porous catalyst layer containing mixed conducting oxide having substantially a perovskite structure and containing a first element selected from Co and Fe, and a second element selected from In, Sn and Y arranged in the B site in the perovskite structure is contiguous to a second surface (1a) of a selective oxygen-permeable dense continuous layer (1) containing mixed conducting oxide. A porous intermediate catalyst layer (3) containing mixed conducting oxide and at least one of Co, Fe, Mn and Pd is contiguous to a first layer (1b) of the dense continuous layer (1). A porous reactive catalyst layer (4) provided with a metal catalyst selected from at least one of Ni, Co, Ru, Rh, Pt, Pd, Ir and Re and a support is continguous to the porous intermediate catalyst layer (3) in a manner to sandwich between the dense continuous layer (1) and the porous reactive catalyst layer (4).

Abstract: Disclosed herein is a small particle oxide powder for dielectrics. The oxide powder has a perovskite structure, an average particle diameter [D50(?m)] of 0.3 ?m or less, a particle size distribution of the average particle diameter within 3%, a particle size distribution satisfying a condition D99/D50<2.5, a content of OH? groups of 0.2 wt % and a C/A axial ratio of 1.006 or more. A method of manufacturing the oxide powder comprises the steps of mixing TiO2 particles and a compound solved with at least one element represented by A of the perovskite structure of ABO3; drying and pulverizing the mixture of TiO2 and the compound; calcining the pulverized mixture; adding the oxide containing the elements of the site A to the coated TiO2 particles and wet-mixing, drying and pulverizing; primarily calcining and pulverizing the pulverized powder under vacuum; and secondarily calcining and pulverizing the powder.

Abstract: An electroceramic component includes a base body, contact layers on the base body, a dielectric layer in the base body that includes a single-phase perovskite ceramic having a composition of Ag(Nb1-xTax)O3, and an electrode layer in the base body containing a precious metal. The electrode layer is sintered with the dielectric layer.

Abstract: This invention provides the three novel La,Fe, La,Cr and Sm,Fe substituted barium titanate solid solution ferroelectric compositions with the formula Ba1?xLnxTi1?xMxO3 wherein when Ln is La, M is Fe or Cr, when Ln is Sm, M is Fe and x is from about 0.02 to about 0.06 and mixtures thereof, the novel La,Fe substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1?ySry)1?xLaxTi1?xFexO3 wherein y is greater than zero and less than about 0.6 and x is from about 0.01 to about 0.06 and the novel La,Al substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1?ySry)1?xLaxTi1?x/4?3a/4Ala}(x?a)/4O3 wherein } denotes a vacancy, y is greater than zero and less than about 0.6, a is from about 0.01 to about 0.06 and x is from 0.02 to about 0.10 with the proviso that x is greater than or equal to a.

Abstract: Single-phase, non-cubic and single-phase, cubic ferroelectric/paraelectric perovskite-structured materials having reasonably low and fairly temperature insensitive dielectric constants (stable dielectric constants over a wide range of operating temperatures of ?80° C. to 100° C.), reasonable loss tangents (<˜10?1), high tunability, and significantly lowered Curie temperature below the temperature range of operation for previous undoped perovskite structures are provided. The FE/PE materials of the present invention have dilute charge-compensated substitutions in the Ti site of the perovskite structure. This single-phase structure or a variant of it with a Ti rich composition, provided herein, allows for pulsed-laser-deposition of a thin film with uniform transfer of the structure of the target into the deposited film, which enables production of very small, lightweight devices that are extremely efficient and consume little power.

Abstract: An ion generator with increased generation of negative ions and its method of manufacture are disclosed. For an ion generator of the present invention, a titanium oxide powder is added to an ion generator that generates negative ions.

Abstract: A new dielectric material composition with high dielectric constant and low dielectric loss, which includes a quaternary metallic oxide having a pervoskite structure and represented by a general formula, Ba1-xM1xTi1-yM2yOm. It is suitable for Gbit memory devices, embedded capacitance devices in multilayered structures, and modulable capacitors for high frequency devices.

Abstract: A multilayer ceramic capacitor having internal electrode layers and dielectric layers, wherein a thickness of said dielectric layer is 2.0 ?m or less, and an average particle number per one dielectric layer obtained by dividing the thickness of said dielectric layer by an average particle diameter of dielectric particles composing said dielectric layer is 3 or more and 6 or less.

Abstract: The dielectric composition contains a mixture of a ceramic composition containing BaaREbTicO3, wherein RE represents a rare earth element, with 0.05?a?0.25, 0.525?b?0.70, 0.85?c?1.0, and 2a+3b+4c=6, and free from lead and bismuth, a glass composition, and a metal oxide. The glass composition preferably contains ZnO or MgO, SiO2, and at least 10% by weight of Li2O or TiO2. Preferably, the alkaline earth metal oxide is MgO. By preference, the glass composition essentially consists of 50–80% weight of SiO2, 5–25% weight of MgO, and optionally another alkaline earth metal oxide, and 10–25% by weight of Li2O, and is substantially free from boron. The dielectric composition can be sintered in the presence of Cu electrodes at a temperature below the melting point of Cu so as to manufacture an electronic device such as a ceramic multilayer element. After sintering, the dielectric composition has a relative dielectric constant of at least 55.