A method of arranging nanocrystals is provided, which includes a first process of putting barium titanate nanocrystals and/or strontium titanate nanocrystals, and a nonpolar solvent into a container, a second process of collecting a supernatant liquid including the barium titanate nanocrystals and/or the strontium titanate nanocrystals from the container, and a third process of immersing a substrate having an uneven structure into the supernatant liquid, and pulling up the substrate so as to coat the surface of the uneven structure with the supernatant liquid by using a capillary phenomenon, and to arrange the nanocrystals on the uneven structure.

A dielectric composition contains: a base material powder containing Ba.sub.mTiO.sub.3 (0.995m1.010); a first accessory ingredient containing at least one element corresponding to a transition metal in Group 5 of the periodic table in a total content of 0.3 to 1.2 moles; a second accessory ingredient containing one of ions, oxides, carbides, and hydrates of Si in a content of 0.6 to 4.5 moles; a third accessory ingredient containing at least one element in Period 4 or higher; and a fourth accessory ingredient containing at least one element in Period 3, wherein 0.70BC+D1.50B and 0.20D/(C+D)0.80, in which B is a total content of the second accessory ingredient, C is a total content of the third accessory ingredient, and D is a total content of the fourth accessory ingredient.

The present application relates to a large-size, high-dielectric breakdown strength titanium oxide based dielectric ceramic material, a preparation method and application thereof. The composition of the titanium oxide based dielectric ceramic material comprises: a CaTiO.sub.3+b SrTiO.sub.3+c TiO.sub.2+d Al.sub.2TiO.sub.5+e SiO.sub.2, wherein a, b, c, d, and e are the mole percentage of each component, 15a35 mol %, 0b2 mol %, 30c84 mol %, 0.5d25 mol %, 0.5e15 mol %, and a+b+c+d+e=100 mol %.

A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with each of the dielectric layers interposed therebetween; and first and second external electrodes disposed on external surfaces of the ceramic body and electrically connected to the first and second internal electrode, respectively, wherein the dielectric layer includes dielectric grains having a core-shell structure including a core and a shell, and a domain wall is disposed in the shell.

A method of manufacturing a ceramic dielectric, including: heat-treating a barium precursor or a strontium precursor, a titanium precursor, and a donor element precursor to obtain a conducting or semiconducting oxide, preparing a mixture including the conducting or semiconducting oxide and a liquid-phase acceptor element precursor, and sintering the mixture to form a ceramic dielectric, wherein the ceramic dielectric includes a plurality of grains and a grain boundary between adjacent grains, and wherein the plurality of grains including an insulating oxide comprising an acceptor element derived from the acceptor element precursor.

Disclosed are compositions comprising inorganic UV-absorbing agents and the use of such compositions, in particular for protecting a subject or the surface of an inanimate object against a harmful effect of ultraviolet radiation.

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 (BaTiO.sub.3) doped with a metal oxide, and the shell region is formed of a ferroelectric material.

Disclosed are compositions comprising inorganic UV-absorbing agents and the use of such compositions, in particular for protecting a subject or the surface of an inanimate object against a harmful effect of ultraviolet radiation.

A mixed conductor represented by Formula 1:

A.sub.4+xM.sub.5-yM.sub.yO.sub.12-,Formula 1

wherein, in Formula 1, A is a monovalent cation, M is at least one of a divalent cation, a trivalent cation, or a tetravalent cation, M is at least one of a monovalent cation, a divalent cation, a trivalent cation, a tetravalent cation, a pentavalent cation, or a hexavalent cation, M and M are different from each other, and 0.3x<3, 0.01<y<2, and 01 are satisfied.

Disclosed are a dielectric material, a multi-layered capacitor, and an electronic device including the same. The dielectric material includes a dielectric material particle represented by ADO.sub.3, wherein A includes Sr, Ba, Ca, Pb, K, Na, or a combination thereof, D includes Ti, Zr, Mg, Nb, Ta, or a combination thereof, the dielectric material particle includes about 2.5 moles to about 4 moles of the donor element, based on 100 moles of D, and a diameter of the dielectric material particle is in a range of from about 100 nanometers to about 300 nanometers.