A multilayer ceramic capacitor includes a multilayer body including dielectric layers, inner-electrode layers, and outer electrodes coupled to the inner-electrode layers. The multilayer body includes Ba, Ti, Ca, Mg, Zr, and R, and when the Ti content is defined as 100 parts by mole, the relative amounts are as follows: Ca, 0.03 parts by mole or more and 0.15 parts by mole or less, Mg, 0.01 parts by mole or more and 0.09 parts by mole or less, R, 2.5 parts by mole or more and 8.4 parts by mole or less; Zr, 0.05 parts by mole or more and 3.00 parts by mole or less: Si, 0.5 parts by mole or more and 4.0 parts by mole or less; and P, 0.005 parts by mole or more and 0.500 parts by mole or less. Ca is in a vicinity of the center of crystal grains contained in the dielectric layers.

A multilayer ceramic capacitor (10) has a laminate body (20) constituted by dielectric layers (17) and internal electrode layers (18) stacked alternately. The dielectric layers (17) contain (Ba.sub.(1-x-y)Ca.sub.xSr.sub.y).sub.m(Ti.sub.(1-z)Zr.sub.z)O.sub.3, where 0.03≤x≤0.16, 0≤y≤0.02, 0<z≤0.02, 0.99≤m≤1.02, as a primary component, and an R oxide (R is a rare earth element) by 1.0 to 4.0 mol in equivalent element, an Mg compound by 0.2 to 2.5 mol in equivalent element, an Mn compound by 0.1 to 1.0 mol in equivalent element, a Zr compound by 0.1 to 2.0 mol in equivalent element, a V compound by 0.05 to 0.3 mol in equivalent element, and an Si compound by 0.2 to 5.0 mol in equivalent element, per 100 mol of the primary component. The multilayer ceramic capacitor can offer excellent DC bias properties and ensure high reliability.

A ceramic electronic device includes a multilayer chip in which a plurality of dielectric layers of which a main component is ceramic and a plurality of internal electrode layers are stacked. The plurality of internal electrode layers include Ni, Sn and Au.

A dielectric composition and a multilayer capacitor including the same are disclosed. The dielectric composition including: a BaTiO.sub.3-based main ingredient; a first auxiliary ingredient including rare earth elements; and a second auxiliary ingredient including at least one of Ba and Ca but essentially including Ba, wherein the rare earth elements include Tb and Dy, and the first auxiliary ingredient and the second auxiliary ingredient satisfy a molar content condition of 0.40<(Tb/T_RE)*(Ba+Ca)<0.93, where T_RE is a total molar content of the rare earth elements in the first auxiliary ingredient.

A light-emitting ceramic that includes a pyrochlore type compound that contains 0.01 mol % or more of Bi with respect to 100 mol % of the general formula M1.sub.XM2.sub.YM3.sub.ZO.sub.W, wherein M1 is at least one of La, Y, Gd, Yb, and Lu, M2 is at least one of Zr, Sn, and Hf, M3 is at least one of Ta, Nb, and Sb, X, Y, Z, and W are positive numbers that maintain electrical neutrality, X+Y+Z=2.0, 0.005≤Z≤0.2, and 3X+4Y+5Z is 7.02 or less.

A multilayer ceramic capacitor includes: a multilayer structure in which each of dielectric layers and each of internal electrode layers are stacked, wherein a relationship of 8.0≥I.sub.A/I.sub.B>1.40 is satisfied in a TSDC (Thermally Stimulated Depolarization Currents) of temperature elevation rate of 10 degrees C./min under a condition of 130 degrees C., 5 V/μm and a polarization of 30 min, when a peak current value on a lower temperature side in a temperature range of 130 degrees C. to 190 degrees C. is I.sub.A and a peak current value on a higher temperature side in a temperature range of 190 degrees C. to 280 degrees C. is I.sub.B.

A dielectric composition includes dielectric particles, grain boundary phases, and segregations. The dielectric particles each include a perovskite compound represented by ABO.sub.3 as a main component. The grain boundary phases are located between the dielectric particles. The segregations exist in a part of the grain boundary phases and include at least Al, Si, and O. A molar ratio (Al/(Al+Si)) of an Al content to a total content of Al and Si in the segregations is 0.45 or more and 0.75 or less.

The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength. The present invention relates to a method of producing a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, the method including: a raw material mixing step of preparing a raw material paste containing ceria-zirconia composite oxide particles, alumina particles, an inorganic binder, and alumina fibers; a molding step of molding the raw material paste into a honeycomb molded body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a drying step of drying the honeycomb molded body obtained in the molding step; and a firing step of firing the honeycomb molded body dried in the drying step into a honeycomb fired body, wherein the percentage of amorphous alumina fibers in the alumina fibers for use in the raw material mixing step is 50 to 100 wt %.

The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength. The present invention relates to a method of producing a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, the method including: a raw material mixing step of preparing a raw material paste containing ceria-zirconia composite oxide particles, alumina particles, an inorganic binder, and inorganic fibers; a molding step of molding the raw material paste into a honeycomb molded body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a drying step of drying the honeycomb molded body obtained in the molding step; and a firing step of firing the honeycomb molded body dried in the drying step into a honeycomb fired body, wherein the raw material mixing step includes pre-mixing of the inorganic binder and the inorganic fibers.

Cordierite-forming batch mixtures including one or more non-oxide inorganic source materials or materials as pore-formers are provided. Non-oxide inorganic materials, such a non-oxide silicon material that includes at least one of silicon carbide, silicon, or silicon nitride, may be added to cordierite-forming batch mixtures as at least a partial replacement for conventional inorganic pore-formers. Non-oxide inorganic pore-formers may provide an increase in pore volume while having a reduced coefficient of thermal expansion impact as compared with conventional pore-formers. Cordierite-forming mixtures as disclosed herein may additionally include rare-earth catalysts and alkaline-earth materials that may enhance the pore-forming effect of non-oxide inorganic pore-formers without significant exothermic reactions or the production of emissions that may require additional processing treatments.