Abstract:
A multi-layer ceramic capacitor is made by alternately layering a dielectric layer constituted by a sintered body of a ceramic powder, and an internal electrode layer. The ceramic powder contains, as a main composition, barium titanate powder having a perovskite structure with a median size of 200 nm or smaller as measured by SEM observation, wherein the barium titanate powder is such that the percentage of barium titanate particle having twin defects in the barium titanate powder is less than 10% as measured by TEM observation and that its crystal lattice c/a is 1.0075 or more.
Abstract:
A substrate surface comprises at least partially at least one elongated structure, wherein each elongated structure comprises a plurality of channels, said channels extending in the direction of the longitudinal axis of the elongated structure, wherein said at least one elongated structure comprises silicon dioxide. The structures are manufactured by: a) providing a reaction solution comprising a silicate, a micelle forming agent, an alkane, a salt, and at least 1.5 M HCl, having a pH of 2 or lower, b) stirring not more than 10 minutes, c) bringing the reaction solution into contact with a substrate surface and d) treating the obtained material with one method selected from a) heat treating the material above 300° C., b) treating the material with at least one selected from H2O2, and H2SO4, c) treating the material with microwaves to digest the micelle forming agent.
Abstract translation:衬底表面至少部分地包括至少一个细长结构,其中每个细长结构包括多个通道,所述通道沿细长结构的纵向轴线的方向延伸,其中所述至少一个细长结构包括二氧化硅。 该结构通过以下方法制造:a)提供包含硅酸盐,胶束形成剂,烷烃,盐和至少1.5M HCl,PH为2或更低的反应溶液,b)搅拌不超过10分钟 c)使反应溶液与基材表面接触,和d)用选自以下的一种方法处理所得材料:a)将材料热处理于300℃以上,b)用至少一种选自H 2 O 2, 和H2SO4,c)用微波处理材料以消化胶束形成剂。
Abstract:
A composite comprising a silicate material, such as, a sodium aluminosilicate, and titanium dioxide disposed on the surface thereof is disclosed, together with formulations comprising the composite and methods for preparing the same.
Abstract:
A ceramic powder that contains, as a main composition, barium titanate powder having a perovskite structure with an average particle size (median size) of 200 nm or smaller as measured by SEM observation, wherein the the barium titanate powder is such that the percentage of barium titanate particle having twin defects in the barium titanate powder is less than 10% as measured by TEM observation and that its crystal lattice c/a is 1.0075 or more. The ceramic powder is particularly useful in the formation of thin dielectric layers of 1 μm or less and can be used to manufacture MLCCs having both desired capacity and longevity traits.
Abstract:
Embodiments of the invention are directed to doped pnictogen chalcogenide nanoplates, where each nanoplate comprises a rhombohedral crystal of Bi2Te3, Bi2Se3, or Sb2Te3 that is sulfur doped. Another embodiment of the invention is directed to a microwave activated method of preparation of the doped pnictogen chalcogenide nanoplates. Other embodiments of the invention are directed to bulk assemblies or fused films of the doped pnictogen chalcogenide nanoplates and their preparation from the doped pnictogen chalcogenide nanoplates such that the bulk assembly or fused film can be employed in a thermoelectric device.
Abstract:
An alloyed semiconductor quantum dot comprising an alloy of at least two semiconductors, wherein the quantum dot has a homogeneous composition and is characterized by a band gap energy that is non-linearly related to the molar ratio of the at least two semiconductors; a series of alloyed semiconductor quantum dots related thereto; a concentration-gradient quantum dot comprising an alloy of a first semiconductor and a second semiconductor, wherein the concentration of the first semiconductor gradually increases from the core of the quantum dot to the surface of the quantum dot and the concentration of the second semiconductor gradually decreases from the core of the quantum dot to the surface of the quantum dot; a series of concentration-gradient quantum dots related thereto; in vitro and in vivo methods of use; and methods of producing the alloyed semiconductor and concentration-gradient quantum dots and the series of quantum dots related thereto.
Abstract:
A method is disclosed for making graphenic carbon particles. The method includes introducing a hydrocarbon precursor material capable of forming a two-carbon-fragment species into a thermal zone, heating the hydrocarbon precursor material in the thermal zone to form the graphenic carbon particles from the hydrocarbon precursor material, and collecting the graphenic carbon particles. Apparatus for performing such a method, and graphenic particles produced by the method, are also disclosed.
Abstract:
The invention is directed to ammonium paratungstate decahydrate containing at least 75% of crystals having a length of at least 200 μm and having a ratio of length to width of less than 4.5:1.
Abstract:
Methods for preparing nanocomposites with thermal properties modified by powder size below 100 nanometers. Both low-loaded and highly-loaded nanocomposites are included. Nanoscale coated, un-coated, whisker type fillers are taught. Thermal nanocomposite layers may be prepared on substrates.
Abstract:
ZnO structures comprising crystalline ZnO micro or nanorods and methods for making and using these ZnO structures are provided. The side surface of the central portion of each rod may comprise planes of the form {1 0 −1 0}, {0 1 −1 0}, {−1 1 0 0}, {−1 0 1 0}, {0 −1 1 0} or {1 −1 0 0}, with central edge regions including a crystallographic plane of the form {2 −1 −1 0} or {−2 1 1 0}. The tip of the rod may comprise planes of the form {1 0 −1 1} {0 1 −1 1}, {−1 1 0 1}, {−1 0 1 1}, {0 −1 1 1} or {1 −1 0 1} with tip edge regions including a crystallographic plane of the form {2 −1 −1 2} or {−2 1 1 2}. The rods may be joined at or near their bases to form a “flower-like” morphology. In an embodiment, a synthesis mixture is prepared by dissolving a zinc salt in an alcohol solvent, followed by addition of at least two additives. The zinc salt may be zinc nitrate hexahydrate, the first additive may be benzyl alcohol and the second additive may be urea.