A positive electrode for a rechargeable lithium battery includes a positive active material for a rechargeable lithium battery that includes a first positive active material including a secondary particle including at least two agglomerated primary particles, where at least a portion of the primary particles has a radial arrangement structure, and a second positive active material having a monolith structure, wherein the first and second positive active materials each include a nickel-based positive active material, and an X-ray diffraction (XRD) peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3. Further embodiments provide a method of manufacturing the positive electrode for rechargeable lithium battery, and a rechargeable lithium battery including the same.

A polycrystalline cubic boron nitride includes a cubic boron nitride particle group. The ratio of a second length to a first length is 0.99 or less. Here, each of the first length and the second length is a value measured on a surface of the polycrystalline cubic boron nitride with an indentation formed by a Knoop hardness test under conditions specified in ISO4545-1 and ISO4545-4. The second length represents the length of the longer diagonal of the indentation. The first length represents the sum of the second length and the length of the streaky indentation.

The present invention relates to an abrasive and a planarization method using the same, and more particularly, includes fumed silica. A BET specific surface area of the fumed silica is 200 m.sup.2/g to 450 m.sup.2/g, a shape of aggregates dispersed in the abrasive has an elongated shape or a round shape, and a ratio of the round shape of the aggregates is 50% to 90%.

An object of the present invention is to provide a silica particle, a silica sol containing the silica particle, and a polishing composition containing the silica sol, which prevent secondary aggregation, have excellent dispersion stability, and are suitable for polishing. The present invention relates to a silica particle in which an average value of a circularity coefficient measured by a field-emission scanning electron microscope is 0.90 or more, and a standard deviation of the circularity coefficient is 0.05 or less.

The present invention relates to a positive electrode active material having improved electrical characteristics by adjusting an aspect ratio gradient of primary particles included in a secondary particle, a positive electrode including the positive electrode active material, and a lithium secondary battery using the positive electrode.

Zinc oxide powder of the present invention contains zinc oxide particles, in which primary particles of the zinc oxide particles have a minor axis of 35 nm or more and 350 nm or less and have a Heywood diameter of 35 nm or more and 400 nm or less, and a coefficient of variation of a number distribution of the Heywood diameters of the primary particles of the zinc oxide powder is 50% or less.

The present invention relates to an oxide sintered material that can be used suitably as a sputtering target for forming an oxide semiconductor film using a sputtering method, a method of producing the oxide sintered material, a sputtering target including the oxide sintered material, and a method of producing a semiconductor device 10 including an oxide semiconductor film 14 formed using the oxide sintered material.

The present invention provides an alumina particle containing molybdenum (Mo) and an inorganic coating part provided on the surface of the alumina particle.

A plate-like alumina particle, in which a ratio I (006)/I (113) of a peak intensity 1(006) at 20=41.6±0.3 degrees which corresponds to a (006) face to a peak intensity I(113) at 20=43.3±0.3 degrees which corresponds to a (113) face of diffraction peaks obtained by X-ray diffraction measurement using a Cu—Kα ray, is 0.2 or more. A method for manufacturing the plate-like alumina particle including mixing an aluminum compound including an aluminum element, a molybdenum compound including a molybdenum element, and a shape-controlling agent to produce a mixture and firing the mixture.

A plate-like alumina particle containing a coloring component is provided. A plate-like alumina particle containing molybdenum, silicon, and a coloring component. A method for manufacturing the plate-like alumina particle, the method including the steps of mixing an aluminum compound containing an aluminum element, a molybdenum compound containing a molybdenum element, silicon or a silicon compound, and a coloring component so as to produce a mixture and calcining the resulting mixture.