Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Victor Company of Japan, Limited

Futamura Kagaku Kabushiki Kaisha

Sony Corporation

Ukima Colour & Chemicals Mfg. Co., Ltd.

Jvc Victor Company of Japan, Ltd.

Akira Nishio

Toru Kawakami

Kenichi Yamane

Shingo Tominaga

Naotsugu Yamamura

Jun Izumi

Akihiro Mochizuki

Hiroyoshi Terada

Hiroya Oniduka

Masaru Kumazawa

Tsuneo Kusunoki

Katsutoshi Ohno

Michiei Nakamura

Shigeru Sakamoto

Mitsuo Yamazaki

Shigeo Sasaki

Kenichi Ozawa

Tomoyuki Tashiro

Masanori Takakamo

Keiji Nakajima

Takamitsu Shinoda

Kenji Takayanagi

Motohisa Maruyama

Seigo Miyashita

Kaori Fukahori

Satoru Nakayasu

Masato Nakamura

Yusuke Ideta

Kenji Seki

Takamasa Numakura

Kanako Sato

Ryuta Nishide

Toshiaki Anzai

Provided is an alumina-based thermally conductive oxide which has not only an excellent thermal conductivity but also excellent chemical resistance, water-fastness, and electrical insulation property, while exhibiting a satisfactory kneadability (miscibility) into a resin and being capable of producing materials and articles, such as a resin composition, having an excellent shapability. Specifically, the present invention is an alumina-based thermally conductive oxide which is obtained by firing a starting material mixture that contains an aluminum starting material. The aluminum starting material is at least one selected from the group consisting of boehmite, aluminum hydroxide, and alumina; the starting material mixture further contains a boric acid compound and an oxide starting material such as a tungsten compound; and the content of the boric acid compound in the starting material mixture is 0.1 to 5 parts by mass, and the content of the oxide starting material in the starting material mixture is 0.1 to 20 parts by mass each based on 100 parts by mass of the aluminum starting material.

Alumina-based thermally conductive oxide and method for producing same

The present invention provides an alumina-based thermally conductive oxide that is excellent not only in thermal conductivity but also in chemical resistance, water resistance, and electrical insulation, that has a good kneadability (miscibility) into resins, and that enables to produce a material or an article, such as a resin composition, which is excellent in shapability. The present invention is an alumina-based thermally conductive oxide obtained by firing a starting material mixture containing an aluminum starting material. The aluminum starting material is at least one selected from the group consisting of boehmite, aluminum hydroxide, and alumina, the starting material mixture further contains at least one additional starting material selected from the group consisting of talc, a frit, a boric acid compound, a molybdenum compound, titanium oxide, a magnesium compound, a zinc compound, a zirconium compound, a phosphoric acid compound, and a tungsten compound, and the content of the additional starting material in the starting material mixture is 0.1 to 20 parts by mass based on 100 parts by mass of the aluminum starting material.

Alumina-based heat conductive oxide and method for producing same

The present invention provides a method for performing a decomposition treatment on a VOC and/or a gas-phase inorganic reducing compound in a gas through ozone oxidation, by which further enhancement of efficiency in oxidative decomposition reaction by ozone is achieved, a decomposition treatment can be performed efficiently on a high-flow rate exhaust gas containing substances such as a VOC and a malodorous substance in low concentrations, and the amount of ozone to be used can be reduced in a method for performing oxidative decomposition treatment with ozone on a VOC and the like using a high silica adsorbent. The present invention is a method for performing an oxidative decomposition treatment with ozone on a VOC and/or a gas-phase inorganic reducing compound in a gas, the method including adding/mixing an ozone gas into a gas containing a VOC and the like, and then bringing a resultant mixed gas into contact with a high silica adsorbent being a packed porous body to perform decomposition treatment on the VOC and the like through ozone oxidation, wherein a porous body including the high silica adsorbent as a base material, and a particulate powder of a transition metal-containing oxide having a BET specific surface area of 80 mor more, the particulate powder carried on the base material, is used as a packing material.

Ozone oxidation decomposition treatment method for VOCs and/or gaseous inorganic reducing compounds in gas

The present invention provides a method for performing a purification treatment on a harmful substance-containing liquid, the method enabling an efficient purification treatment of a harmful substance-containing liquid by using dissolved ozone being an oxidizing agent with high level of safety, and a harmful substance-containing liquid purification treatment apparatus for carrying out the method. A method for performing a purification treatment on a harmful substance-containing liquid, the method comprising adding and mixing dissolved ozone into a harmful substance-containing liquid containing a harmful substance, thereafter bringing the harmful substance-containing liquid into contact with a transition metal-containing oxide having a BET specific surface area of 80 m/g or more, adsorbing ozone, and adsorbing a harmful substance, and then allowing the harmful substance-containing liquid to flow to accelerate oxidation of the harmful substance by dissolved ozone, thereby performing a highly efficient oxidative decomposition, and a harmful substance-containing liquid purification treatment apparatus for carrying out the method.

Purification treatment method of liquid containing harmful substance, and purification treatment device of liquid containing harmful substance for carrying out said method

The thermally conductive composite oxide of the present invention has excellent physical properties, such as high thermal conductivity, water resistance, acid resistance, electric resistance, and electric insulation, required for coating films, films, and articles thereof. Paints or resins including the composite oxide can provide coating films, films, and articles having such properties without treating of a surface, etc. The composite oxide has a spinel structure and contains aluminum as a main metal component and at least one metal other than aluminum, which is magnesium, zinc, calcium, and/or strontium, and has a ratio (b mol)/(a mol) in a range of 0.1 or more and 1.0 or less, where the ratio (b mol)/(a mol) is a number of moles (b) of the metal other than aluminum to that of moles (a) of an aluminum element derived from an alumina-based compound. The thermally conductive composite oxide has Mohs hardness of less than 9.

Thermally conductive complex oxide, production method therefor, thermally conductive complex oxide-containing composition, and use therefor

A composite oxide black pigment has characteristics to absorb visible rays and near infrared rays, and is composed of an oxide of main constituent metals including copper, manganese and iron. In a wavelength region of 400 to 1,000 nm, the composite oxide black pigment has a minimum wavelength, at which a transmittance becomes minimum, in a wavelength region of 600 to 800 nm, a molar ratio of manganese/iron is 3/1 to 30/1, and a molar ratio of copper/(manganese+iron) is 1/2 to 1.2/2. Its sole use makes it possible to obtain a transparent vivid bluish, neutral gray color, and also to maximize an absorption in a near infrared region. It is, therefore, excellent in near infrared absorption characteristics.

Composite oxide black pigment and method for producing same

To provide a Cu&#x2014;Mn&#x2014;Fe-based complex inorganic oxide black pigment having a more vivid bluish hue than a Cu&#x2014;Mn&#x2014;Fe-based complex inorganic oxide black pigment obtained by a conventional wet method. A Cu&#x2014;Mn&#x2014;Fe-based complex inorganic oxide black pigment having a more vivid bluish hue is disclosed. The complex inorganic oxide black pigment has a spinel structure composed of oxides of copper, manganese and iron as main constituent metals, the molar ratio of copper/manganese/iron is in a range of 3 to 8/5 to 10/1, at least one divalent metal element other than the main constituent metals has been introduced, and the molar ratio of (copper+the divalent metal element)/(manganese+iron) is in a range of 1 to 1.6/2. A production process of the black pigment is also disclosed.

A motor () having a dynamic pressure fluid bearing is composed of a hub (), a rotor () provided with a shaft () of which one end portion is securely fastened by the hub () and another end portion is formed with a flange (), and a stator () composed of a sleeve section () for axially sustaining the shaft () so as to be rotatable freely and a thrust plate () secured on the sleeve section () so as to confront with the flange (), wherein the dynamic pressure fluid bearing is composed of a thrust dynamic pressure fluid bearing constituted by the flange () and the thrust plate (), and wherein the shaft () is provided with a through hole () bored through the shaft () from the one end surface to the other end surface, and wherein the through hole () is formed in a shape having an opening to the other end surface of the shaft () by way of a funnel shaped section () of which diameter gradually increases toward the other end surface of the shaft ().

Motor having dynamic pressure fluid bearing and disc drive apparatus provided with the motor

In the rotary medium driving apparatus equipped with the rotor , which can rotate freely around the shaft fixed to the stator by means of the ball bearings and and is provided with a certain diameter being capable of fitting a center hole of a rotary medium, the stator is composed of the flat base formed by a presswork and the stator core . The base holds the shaft , which is inserted into the inner circumference surface of the base , and has the ring shaped projection for allocating the stator core on the outer circumference surface of the base

Rotary medium driving apparatus

A composition for a black matrix is disclosed. The composition is composed of a black pigment and a binder for the pigment. The black pigment is a compound-oxide black pigment, which comprises at least two metal oxides and has a spinel or inverse-spinel crystalline structure. Also discloses are a process for the formation of a black matrix from the composition and an article provided with a black matrix so formed.

Composition for black matrix, fabrication process of black matrix and

A minute-particle iron oxide red pigment slurry is formed by adding sodium silicate to a minute-particle iron oxide red pigment slurry, and used to form a red filter formed between a phosphor layer of a color cathode ray tube and a panel thereof. Therefore, even if the red filter is brought in contact with a black matrix under the condition of a process of manufacturing the color cathode ray tube at high temperature, the red filter does not discolor the black matrix.

Minute-particle iron oxide red pigment slurry and method of

The specification discloses a disc driving device having a spindle motor for driving a storage disc with a hub mounted on a spindle of the spindle motor in a sealed housing. The spindle motor comprises the spindle, a stator frame for supporting the spindle with bearings therebetween and a core assembly fitted over the stator frame. The core assembly comprises a laminated core subjected to an electroless metal plating, an insulator generally covering the laminated core, which insulator has projections for fixing a flexible board and retainers for holding winding coils on the laminated core. The sealed housing comprises a housing having a concave portion at the bottom thereof. The concave portion comprises a upper portion having a concave wall and a lower portion having a cylindrical wall coupled to the upper portion. The stator frame is fixed in the lower portion, and a part of the hub is positioned in the upper portion. Further, a trench is provided on the concave wall of the upper portion for holding the flexible board in place so as not to disturb the rotation of the hub in the sealed housing.

Disc driving device for storage disc

A motor for a disc driving device having a single straight shaft for rotating a magnetic disc mounted on a hub press-fitted to the single shaft. The single straight shaft is prevented from being driven out of the hub by providing internal threads at both ends of the straight shaft for engaging first and second screws through the internal threads respectively. The first screw causes a clamper to depress a magnetic hard disc against the hub, the second screw is provided to prevent the single straight shaft from being driven out of the hub. The straight shaft abuts a first and second bearing separated by spacer means disposed under the hub in alignment with the first and second inner races of the first and second bearing.

Motor for a disc driving device having a hub positioned on inner race of

A first multi-phase dc motor comprising: a field-magnet portion having P field magnetic poles positioned as a circular array at angularly equally spaced intervals; and an armature having cores as angularly equally spaced N protruding poles providing N slots therebetween with .phi.-phase coils disposed therein, either said field magnet portion or said armature being rotatable with respect to the other; and P, N, and .phi. being defined by P=2n, N=2n.+-.1, and N is not m times .phi. wherein n and m are natural numbers. A second multi-phase dc motor comprising: a field-magnet portion having P field magnetic poles positioned as a circular array at angularly equally spaced intervals; and an armature having cores as angularly equally spaced N protruding poles providing N slots therebetween with .phi.-phase coils disposed therein, either said field magnet portion or said armature being rotatable with respect to the other; and P, N, and .phi. being defined by P=2n, N=2(n.+-.1), and N is not m times .phi.. According to the invention, frequency of cogging per one turn is more than that of the conventional motor with the same number of magnet poles, so that degree of cogging torque is reduced.

Multi-phase DC motor

A three-phase direct-current motor has a field magnet having P field poles positioned as a circular array at angularly equally spaced intervals, and an armature having cores providing N slots with three-phase coils disposed therein, either the field magnet or the armature being rotatable with respect to the other. P and N are defined by P=2(4n+3) and N=3(2n+1) where n is an integer of 1 or more, and being selected such that the least common multiple of N and P is equal to N.times.P. Alternatively, P and N are defined by P=2(3n.+-.1) and N=6n where n is an integer of 2 or more.

Growing community of inventors

Tokyo, Japan

Akira Nishio