National Institute for Materials Science

National Institute for Research in Inorganic Materials

Murakami Corporation

National Institute for Researches in Inorganic Materials

Takefumi Mitsuhashi

Yoshinori Fujiki

Masayuki Kamei

Takayoshi Sasaki

Mamoru Watanabe

Akio Watanabe

Yoshito Onoda

Tadashi Ohachi

Mamoru Mizuhashi

Nitin Kumar Labhasetwar

A color wheel including a disk-shaped substrate made of a light-transmittable medium and a plurality of filters arranged on the substrate is fabricated. Each filter is capable of selectively transmitting rays of light having a desired wavelength. The method of fabricating the color wheel including the steps of forming at least one of a plurality of adjoining selective color-transmittable films as the filters each at a predetermined area on a front side of the disk-shaped substrate, and utilizing, as a mask for exposure from a back side of the disk-shaped substrate, a portion containing at least one of two borders with which each one of the plurality of adjoining selective color-transmittable films is defined.

Color wheel fabrication method

Methods for producing ruthenium perovskite represented by a chemical formula LaRuO , wherein La is lanthanum to which twelve oxygen ions are coordinated, Ru is ruthenium to which six oxygen ions are coordinated, and O is oxygen, which comprises reacting an aqueous mixed metal ion solution containing metal ions of La and Ru with a precipitate-forming liquid in a reaction container to co-precipitate hydroxides of La and Ru, and subjecting the precipitate to a heat treatment. Alternatively, the co-precipitated mass is deposited on a suitable carrier and subsequently heated to form supported LaRuO . The co-precipitated La and Ru hydroxides can also be directly formed on a carrier by precipitation from a homogenous solution containing La, Ru and urea. This provides a uniform dispersion of co-precipitated hydroxides on a carrier, subsequent heating of which results in formation of supported LaRuO . The materials thus obtained are to be used as efficient catalysts for certain reactions of environmental importance. These synthesis methods can also be used for the improved synthesis of LaRuO for other applications.

Methods of producing ruthenium perovskite

A method for rapidly imparting hydrophobicity to an oxide solid surface, which comprises exerting a mechanical stimulation to a desired region of a hydrophilicity-imparted oxide solid surface, to change said region to be hydrophobic.

Method for rapidly imparting hydrophobicity to a hydrophilicity-imparted oxide solid surface

A tetragonal system tunnel-structured compound having the formula:

Tetragonal system tunnel-structured compound AX(GA8MYGA(8+X)-YTI16-X0

A process for producing potassium hexatitanate fibers having a tunnel structure, which comprises mixing a titanium component represented by the general formula (Ti, M)O.sub.2 where M is metal impurities with a potassium component selected from the group consisting of potassium oxide, potassium compounds capable of forming potassium oxide when heated and a mixture thereof, to obtain a mixture represented by the general formula K.sub.2 O.n(Ti, N)O.sub.2 where n is from 1.5 to 2.5 and M is as defined above; heating the mixture to obtain a melt; forming from the melt a fibrous material having a layered crystalline structure corresponding to potassium dititanate (K.sub.2 O.2TiO.sub.2); leaching a part of K.sub.2 O from the fibrous material; and heating the fibrous material at a temperature of at least 800.degree. C. and lower than the melting point of the fibrous material.

Growing community of inventors

Ibaraki, Japan

Takefumi Mitsuhashi