A dielectric ceramic composition and a multilayer ceramic capacitor including the same are provided. The dielectric ceramic composition includes a BaTiO.sub.3-based base material main ingredient and an accessory ingredient, where the accessory ingredient includes dysprosium (Dy) and niobium (Nb) as first accessory ingredients. A total content of the Dy and Nb is greater than 0.2 mol and less than or equal to 1.5 mol based on 100 mol of titanium (Ti) of the base material main ingredient.

A dielectric ceramic composition and a multilayer ceramic capacitor comprising the same are provided. The dielectric ceramic composition includes a BaTiO.sub.3-based base material main ingredient and an accessory ingredient, where the accessory ingredient includes dysprosium (Dy) and cerium (Ce) as first accessory ingredients. A total content of Dy and Ce is greater than 0.25 mol % and equal to or less than 1.0 mol % based on 100 mol % of the base material main ingredient.

A dielectric ceramic composition includes a base material main component of barium titanate and a subcomponent. A microstructure of the dielectric ceramic composition after sintering includes a first grain having a Ca content of less than 3.5 at % and a second grain having a Ca content of 3.5 to 13.5 at %, and an area ratio of the second grain to an area of the total grains is 70% to 95%.

A red zirconium-oxide sintered body includes oxide of cerium, auxiliary metal oxide and oxide of zirconium, wherein the auxiliary metal oxide includes any one or a combination of at least two of oxide of yttrium, oxide of magnesium, oxide of calcium and oxide of ytterbium; the red zirconium-oxide sintered body satisfies conditions that the oxide of cerium has a content of 0.2˜1.5 mol %; the oxide of cerium comprises trivalent cerium oxide; a sum of contents of the oxide of cerium and the auxiliary metal oxide is 1.1˜2.5 mol %; and the sintered body has fracture toughness≥8 MPa.Math.m.sup.1/2. The zirconium-oxide sintered body has red appearance and toughness more than 8 MPa.Math.m.sup.1/2, and can be used for products such as mobile phone backboards, ornaments and dial plates.

A method of manufacturing a multilayer ceramic electronic component includes: preparing a dielectric magnetic composition including base material powder particles including BaTi.sub.2O.sub.5 or (Ba.sub.(1-x)Ca.sub.x)Ti.sub.2O.sub.5 (0≤x≤0.1), the base material powder particles having surfaces coated with one or more of Mg, Mn, V, Ba, Si, Al and a rare earth metal; preparing ceramic green sheets using dielectric slurry including the dielectric magnetic composition; applying an internal electrode paste to the ceramic green sheets; preparing a green sheet laminate by stacking the ceramic green sheets to which the internal electrode paste is applied; and preparing a ceramic body including dielectric layers and a plurality of first and second internal electrodes arranged to face each other with each of the dielectric layers interposed therebetween by sintering the green sheet laminate.

A method of manufacture for a carbon/carbon part including a method to remove contamination from an intermediate product of the carbon/carbon part and furnace utilizing a gaseous reducing agent hydrogen gas to reduce the contaminates, thereby causing the contaminates to transition to a gaseous state at relatively lower temperatures. A method to remove contamination from an intermediate product of the carbon/carbon part and furnace utilizing hydrogen gas to reduce the contaminates, thereby causing the contaminates to transition to a gaseous state at relatively lower temperatures.

The light shielding member of the present disclosure includes an aluminum oxide ceramics including an oxide of titanium whose composition formula is shown as TiO.sub.2-x (1≤x<2), and a total content of Fe, Ni, Co, Mn and Cr is 260 mass ppm or less.

A method of making a hot surface igniter is described. A silicon carbide composition that includes both fines fraction and a coarse fraction is sintered in a nitrogen and argon reducing atmosphere in a manner that controls the incorporation of nitrogen with in the lattice of recrystallized silicon carbide. The controlled incorporation of nitrogen in the lattice provides enhanced control over heating and electrical properties, while simultaneously achieving a lower surface area fully recrystallized structure for oxidation resistance and long service life.

The present invention has an object of providing: a wavelength conversion member and a wavelength conversion element which are capable of reducing the decrease in luminescence intensity with time and the melting of component materials when irradiated with high-power LED or LD light; manufacturing methods of the wavelength conversion member and the wavelength conversion element; and a light-emitting device. A wavelength conversion member 10 containing a matrix 1 and phosphor particles 2 dispersed in the matrix 1, the matrix 1 comprising: a skeleton made of an inorganic material 3; and a transparent material 4 filled in a hole formed by the skeleton, the inorganic material 3 having a higher thermal conductivity than the transparent material 4.

Provided are a dielectric material, a device including the dielectric material, and a method of preparing the dielectric material, in which the dielectric material may include: a layered perovskite compound, wherein the layered perovskite compound may include at least one selected from a Dion-Jacobson phase, an Aurivillius phase, and a Ruddlesden-Popper phase, a temperature coefficient of capacitance (TCC) of a capacitance at 200° C. with respect to a capacitance at 40° C. may be in a range of about −15 percent (%) to about 15%, and a permittivity of the dielectric material may be 200 or greater in a range of about 1 kilohertz (kHz) to about 1 megahertz (MHz).