The present invention relates to a method for preparing a nano-titanate, a nano-titanic acid and a nano-TiO.sub.2 containing doping E or embedding E nanoparticles, and the use thereof. By using an E-doped Ti-T intermetallic compound as a titanium source, and reacting it with alkaline solution at atmospheric pressure and near its boiling-point temperature, an E-doped titanate nanofilm is prepared with high efficiency and in a short time. Through acid treatment and (or) heat treatment, a titanate nanofilm containing embedding E nanoparticles, an E-doped titanic acid nanofilm, and a titanic acid nanofilm and a TiO.sub.2 flake powder containing embedding E nanoparticles can be further prepared. Through a subsequent reaction at high temperature and pressure, the preparation of an E-doped titanate nanotubes and titanic acid nanotubes, and titanic acid nanotubes and TiO.sub.2 nanotubes/nanorods containing embedding E nanoparticles can be achieved in high efficiency and low-cost.

The present invention provides a cathode active material for a nonaqueous electrolyte secondary battery with a high capacity, high stability and excellent output characteristics and a method for producing the same, and a nonaqueous electrolyte secondary battery using the cathode active material. The cathode active material for a nonaqueous electrolyte secondary battery is represented by a general formula: Li.sub.tNi.sub.1-x-y-zCo.sub.xAl.sub.yTi.sub.zO.sub.2 wherein 0.98t1.10, 0<x0.30, 0.03y0.15, 0.001z0.03; and includes a hexagonal lithium-containing composite oxide with a layer structure of secondary particles having primary particles, in which a titanium-enriched layer is formed on a surface of the primary particles and/or a grain boundary between the primary particles. The titanium-enriched layer on the surface of the primary particles and/or a grain boundary between the primary particles serves as a lithium ion conductor, yielding smooth extraction and insertion of lithium ions. Accordingly, the secondary battery with a high capacity, high stability and excellent output characteristics can be produced when a positive electrode is formed with the lithium nickel composite oxide as a cathode active material.

A simple one pot sol-gel method for the synthesis of bi-metal nanostructures is based on non-noble metals (Fe, Co and Sn) and titanium. The method involves the synthesis of mixed metal nanoscale composites using low cost precursors which allow for the synthesis of desired nanocomposite materials with self-scarifying titanium or silica supports. The procedure does not require any surfactant or any need for pH controlled step. Applicants' method involves the in-situ generation of precursors and their simultaneous entrapment in a gel. This simple one pot synthesis allows for the synthesis of homogenous size, shape and distribution of targeted nanostructures. Further, this method can be applied for the preparation of various nanocomposite materials using different choices of metals and self-scarifying supports. Applicants also show that Pd, the noble metal based nanocomposite is feasible.

A method of making a titanium dioxide nanowire array includes contacting a substrate with a solvent comprising a titanium (III) precursor, an acid, and an oxidant while microwave heating the solvent, thereby forming a hydrogen titanate H2Ti2O5.H2O nanowire array. The hydrogen titanate nanowire array is annealed to form a titanium dioxide nanowire array. The substrate is seeded with titanium dioxide before starting the hydrothermal synthesis of the hydrogen titanate nanowire array. The titanium dioxide nanowire array is loaded with a platinum group metal to form an exhaust gas catalyst. The titanium dioxide nanowire array can be used to catalyze oxidation of combustion exhaust.

Disclosed are embodiments of tungsten bronze crystal structures that can have both a high dielectric constant and low temperature coefficient, making them advantageous for applications that experience temperature changes and gradients. In particular, tantalum can be substituted into the crystal structure to improve properties. Embodiments of the material can be useful for radiofrequency applications such as resonators and antennas.

Disclosed are embodiments of tungsten bronze crystal structures that can have both a high dielectric constant and low temperature coefficient, making them advantageous for applications that experience temperature changes and gradients. In particular, tantalum can be substituted into the crystal structure to improve properties. Embodiments of the material can be useful for radiofrequency applications such as resonators and antennas.

A capacitor component includes a body in which a dielectric layer and an internal electrode are alternately stacked, and an external electrode disposed on the body and connected to the internal electrode. The dielectric layer includes a composite layer including a dielectric material powder and a metallic particle and first and second protective layers including a dielectric material powder and spaced apart by the composite layer. A thickness of each of the first and second protective layers is equal to or greater than of a thickness of the dielectric layer.

Disclosed are a gas sensor member, a gas sensor using the same, and manufacturing methods thereof, and specifically, a gas sensor member using a one-dimensional porous metal oxide nanotube composite material having a double average pore distribution in which mesopores (0.1 nm to 50 nm) and macropores (50 nm to 300 nm) are simultaneously formed on the surface of a nanotube through decomposition of a spherical polymer sacrificial template and continuous crystallization and diffusion of a metal oxide and a nanoparticle catalyst embedded in an apoferritin is uniformly loaded in the inside and on the outer wall and inner wall of a one-dimensional metal oxide nanotube through a high-temperature heat treatment, a gas sensor using the same, and manufacturing methods thereof are disclosed.

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 %.

According to one embodiment, there is provided an electrode including active material particles, polymer fibers and inorganic solid particles. The polymer fibers have an average fiber diameter of 1 nm to 100 nm.