This invention relates to a multilayer ceramic capacitor produced by alternatively stacking the ceramic dielectric layers and internal electrodes mainly comprise base metals. The present dielectric ceramic composition having a main component with a perovskite structure ABO.sub.3 formula of:

(K.sub.xNa.sub.yLi.sub.zA.sub.1-x-y-z).sub.m(Nb.sub.uTa.sub.vB.sub.w)O.sub.3

wherein:
A is at least one selected from the alkaline earth element group of Ca, Sr, and Ba;
B is at least one selected from the group of Ti, Zr, Hf and Sn;
and wherein:
x, y, z, u, v, and w are molar fractions of respective elements, and m is the molar ratio of A-site and B-site elements. They are in the following respective range:
0.95≤m≤1.05;
0.05≤x≤0.90; 0.05≤y≤0.90; 0.00≤z≤0.12
0<u<1; 0.0≤w≤0.3; u+v+w=1
The dielectric ceramic composition further contains:
a first accessory ingredient composes at least one selected from the rare-earth compounds, wherein the rare-earth element is no more than 10 mole parts with respect to 100 mole parts of the main component; a second accessory ingredient composes at least one selected from transition metal compounds, wherein the transition metal element is in the range of 0.05 mole to 10.00 mole parts with respect to 100 mole parts of the main component; and a third accessory ingredient composes a compound with low melting temperature to assist the ceramic sintering process, which is within the range of 0.01 mole to 15 mole parts with respect to 100 mole parts of the main component.

A dielectric ceramic composition and a multilayer ceramic capacitor comprising the same includes a barium titanate (BaTiO.sub.3)-based base material main ingredient and an accessory ingredient, and the accessory ingredient includes a third trivalent lanthanide rare earth element A and terbium (Tb) as rare earth elements, and a molar ratio (Tb/A) of a content of terbium (Tb) to the content of the trivalent lanthanide rare earth element A satisfies 0.15≤Tb/A<0.50.

The disclosure relates to a Low Temperature Co-fired Ceramic (LTCC) substrate and a preparation method thereof, and in particular to a dielectric-constant-adjustable LTCC substrate and a preparation method thereof. The LTCC substrate of the disclosure includes the following components: glass, SiO.sub.2 and Al.sub.2O.sub.3, a weight percentage of the SiO.sub.2 in the LTCC substrate is 10% to 25%.

A ceramic article formed from a plurality of materials, the ceramic article being characterized by the addition of glass fibers having a certain length, diameter and aspect ratio and a method for forming a ceramic article.

The present invention relates to a collection apparatus for collecting particulate matter generated due to friction between a rotor and a brake pad in a brake system of a transport facility, the collection apparatus including a first collector configured to surround a portion of an outer side surface of the rotor, an upper collector configured to surround a portion of an outer peripheral surface of the rotor, and a second collector configured to surround a portion of an inner side surface of the rotor, wherein the first collector and the second collector are made of porous ceramic foam. According to the present invention, particulate matter generated due to friction between a rotor and a brake pad in a brake system of a transport facility can be efficiently collected, and by reducing the amount of particulate matter generated when braking a transport facility, air pollution can be prevented.

Sintered product having a chemical analysis such that, in mass percentages: SiO.sub.2 content is greater than 0.2% and less than 2%, and CaO content is greater than 0.1% and less than 1.5%, and MgO content is less than 0.3%, and alumina and other elements being the complement at 100%, the content of other elements being less than 1.5%, having a relative density greater than 90%, comprising, for more than 90% of its volume, a stack of ceramic platelets (10) laid flat, all of said platelets having an average thickness less than 3 μm, more than 95% by number of said platelets each containing more than 95% by mass of alumina, having a width (l) greater than 81 mm.

A silicate mixture and a combustion accelerator increase combustion efficiency in a combustion engine. The silicate mixture is formed by mixing a first component including one or two or more materials selected from silicon compounds including silicon, glass, and quartz, and a second component including one or two or more materials selected from materials formed by sintering a silicate mineral at a temperature of 1300° C. or higher and 2000° C. or lower and ores emitting a terahertz wave.

A multilayer substrate that includes a first ceramic layer that is a dense body, a second ceramic layer that has open pores, and a resin layer adjacent the second ceramic layer, wherein a material of the resin layer is present in the open pores of the second ceramic layer.

The present disclosure discloses a hybrid woven fiber preform-reinforced composite material, including a fiber preform, a composite material interface and a matrix, where the fiber preform is a three-dimensional fabric hybrid woven by 2-5 high-performance inorganic fibers, and the matrix is selected from the group consisting of resin, light alloy, carbon and ceramic. A preparation method of the composite material includes: preparing ceramic slurry, fiber bundle impregnation treatment, fiber weaving, molding of three-dimensional overall structure preform, preform heat treatment, preparing interface and preparing matrix. The present disclosure improves the weaving performance of inorganic rigid fibers, and the prepared hybrid woven fiber preform-reinforced composite material has desirable integrity, high interlayer bonding strength, and is not easy to layer. Meanwhile, the present disclosure realizes the functions of wave transmission, wave-absorbing, high-temperature structural material, thermal insulation and thermal prevention through the combination of hybrid woven fibers.

An optically clear resin for additive manufacturing includes an optically clear ceramic precursor having a pre-defined refractive index. Each molecule of the ceramic precursor has at least two photopolymerizable functional groups, at least one of the photopolymerizable functional groups being functionalized with a refractive index-tuning group thereby causing the ceramic precursor to have the pre-defined refractive index.