Ngk Insulators, Inc.

Tokyo Electric Power Services Co., Ltd.

Tatsuya Hishiki

Manabu Isomura

Ichiro Wada

Jungo Kondo

Tomonori Takahashi

Tomoyoshi Tai

Yoshimasa Kobayashi

Yoshio Kikuchi

Makoto Ito

Shoji Seike

Hiroharu Kobayashi

Yudai Uno

Makoto Teranishi

Hiroyuki Shibata

Masahiro Murasato

Ryujiro Nagasaka

Toshiichi Ikami

Tadanori Komoda

Shunichi Kiyosawa

Kazuo Ohta

A bonded body for an optical modulator includes a supporting substrate, an optical waveguide material provided on the supporting substrate and composed of lithium niobate, lithium tantalate and lithium niobate-lithium tantalate, and an optical waveguide in the optical waveguide material. The supporting substrate is composed of a material selected from the group consisting of magnesium oxide and a magnesium-silicon composite oxide.

Bonded bodies for optical modulators, optical modulators and a method of producing bonded bodies for optical modulators

Security of a printed matter is enhanced, and a visual image is made clear if a latent image formed by a coating printed on a matter to be printed for a security enhancement of the printed matter becomes the visual image. A security ink pigment contains a powder. A main constituent of the powder is a perovskite-type oxide. The perovskite-type oxide has a composition expressed as a general formula of ABO. A is mainly made of Ba. B is mainly made of Sn. The powder emits an infrared fluorescence when being irradiated with an ultraviolet excitation light. The perovskite-type oxide has a crystal lattice constant having a difference equal to or smaller than 0.002 angstrom from a theoretical crystal lattice constant of the perovskite-type oxide having a composition expressed as a composition formula of BaSnO.

Security ink pigment, security ink, printed matter, and method of producing security ink pigment

A luminescent substance particle includes BaSnO:Zn having a perovskite-type structure, a content of Zn (zinc) being more than 0.0% by mass and less than 8.0% by mass. Alternatively, a luminescent substance particle includes BaSnO:Mg having a perovskite-type structure, a content of Mg (magnesium) being more than 0.0% by mass and less than 0.1% by mass.

Fine fluorescent-material particles, process for producing fine fluorescent-material particles, thin fluorescent-material film, wavelength conversion film, wavelength conversion device, and solar cell

A transparent sealing member is provided with minute recesses at least in the surface of the member from which light from an optical element is emitted. The average width of the minute recesses is 0.1 &#x3bc;m to 2.0 &#x3bc;m, the average depth of the minute recesses is 5 nm to 50 nm, and the average frequency of occurrence of the minute recesses is 100000 to 3000000 recesses per 1 mm.

Transparent sealing member

A luminescent substance particle including BaSnOhaving a perovskite-type structure, wherein the luminescent substance particle contains one of 0.07% by mass or less of Fe (iron), 0.005% by mass or less of Cr (chromium) and 0.02% by mass or less of Ni (nickel). A wavelength conversion film including the luminescent substance particle for converting a light in an ultraviolet region to a light in an infrared region. A wavelength conversion device including a substrate and the wavelength conversion film formed on the substrate.

Luminescent substance particle having perovskite-type structure

A simple method of manufacturing a silica membrane which has high separation performance and high permeation flux is provided. The method is a method for manufacturing a silica membrane by depositing a silica sol on a porous substrate, drying the silica sol by air blowing which has a dew point of -70 to 0&#xb0; C., and then firing the same thereafter to produce the silica membrane. Further, the silica sol is preferably dried by air blowing at an air velocity of 5 to 20 m/sec.

Method of manufacturing silica membrane

There are disclosed a ceramic porous membrane formed with less membrane formation times and having less defects, a small and uniform thickness and a high flux, and a ceramic filter. A silica membrane is formed on a titania UF membrane as an ultrafiltration membrane (a UF membrane) formed on a porous base member which is a microfiltration membrane (also referred to as an MF membrane) and having an average pore diameter smaller than that of the porous base member, and the silica membrane has an average pore diameter smaller than that of the titania UF membrane, and does not substantially permeates the titania UF membrane.

Ceramic porous membrane and ceramic filter

There is provided a ceramic filter provided with a ceramic porous membrane having few defects, small and uniform membrane thickness, and high resolution performance. The ceramic filter includes: a porous substrate which is a microfiltration membrane (MF membrane), a titania UF membrane which is an ultrafiltration membrane (UF membrane) formed on the porous substrate and has an average pore size of 2 to 20 nm and an average thickness of 0.1 to 1.0 &#x3bc;m, and a silica membrane which is formed on the titania UF membrane and a ceramic porous membrane a part of which has penetrated into pores of the titania UF membrane or into pores of the UF membrane and the porous substrate.

Ceramic filter

There is disclosed a method of manufacturing a thin and uniform ceramic filter formed with less membrane formation times and having less defects. A ceramic sol whose average pore diameter after the sol itself has been formed into a membrane is larger than that of a ceramic separation membrane and is 10 nm or less is brought into contact with the surface of a ceramic separation membrane having an average pore diameter of 0.5 to 10 nm, and the ceramic separation membrane having the ceramic sol is dried and then fired to repair a defect portion of the ceramic separation membrane.

Method of manufacturing ceramic filter

There are disclosed a ceramic porous membrane formed with less membrane formation times and having less defects, a small and uniform thickness and a high resolution, and a ceramic filter. A silica membrane as a ceramic porous membrane is formed on a titania UF membrane as an ultrafiltration membrane (a UF membrane) formed on a porous base member which is a microfiltration membrane (also referred to as an MF membrane) and having an average pore diameter smaller than that of the porous base member, the silica membrane has an average pore diameter smaller than that of the titania UF membrane and a part of the silica membrane permeates the titania UF membrane.

A ceramic filter is provided, including a base body having partition walls made of a ceramic porous body and defining cells, filter membranes provided on the partition walls which are made of a ceramic porous body having an average pore diameter smaller than that of the surface of each partition wall, and a glass seal provided to cover at least the end face of the base body. The glass seal includes an alkali-free glass containing silica (SiO2) in an amount of 55 to 65 mol %, zirconia (ZrO2) in an amount of 1 to 10 mol % and at least one kind of alkaline earth metal oxide selected from calcia, baria and strontia, but which does not substantially contain zinc oxide.

A method for manufacturing a filter utilizing a porous ceramic membrane as a separation film is provided, comprising the steps of substituting the air inside fine-pores of the porous substrate with a liquid, isolating the porous substrate face to be provided with a separation film, the other face of the porous substrate face not provided with the separation film, continuously feeding a film deposition slurry containing ceramic framework particles to allow the slurry to contact the face of the porous substrate to be provided with the separation film, applying a differential filtration pressure between the faces of the porous substrate, and depositing the slurry on the surface of the porous substrate. An organic polymer for endowing the deposition film with filtration resistance is added to the slurry.

Method for manufacturing filter having ceramic porous film as separating film

In a composite sealing material having an inner portion and a carbon outer portion, a bulk density of the carbon outer portion is set in a range of 0.3.about.2.0 g/cm.sup.3, preferably in a range of 0.5.about.1.5 g/cm.sup.3, or fiber members are mixed in the carbon outer portion, or an oil layer is arranged on the carbon outer portion, or an organic layer or an inorganic layer is arranged on the carbon outer portion, so as to improve sealing properties of sealing members formed by using the composite sealing materials.

Growing community of inventors

Nagoya, Japan

Tatsuya Hishiki