Shin-etsu Chemical Co., Ltd.

Agency of Industrial Science and Technology

Hitachi, Ltd.

Emori & Co., Ltd.

Nikka Chemical Ind. Co., Ltd

Susumu Ueno

Hirokazu Nomura

Kiyoshi Imada

Mikio Aramata

Mikio Watanabe

Toshio Shinohara

Hirofumi Fukuoka

Tetsuya Inukai

Masahiro Usuki

Koichiro Watanabe

Yoichi Tanifuji

Yasuhide Nishina

Michihiko Asai

Ichiro Kaneko

Hajime Kitamura

Yoshio Suda

Yoshiharu Konya

Takeshi Fukuda

Toshihide Shimizu

Satoru Miyawaki

Hajime Ishizaka

Shigehiro Hoshida

Kazutoshi Fujioka

Kazuma Momii

Yoshihiro Shirota

Masaaki Furuya

Masao Maruyama

Masanobu Nishimine

Kouiti Kuroda

Akio Muraida

Minoru Takamizawa

Hiroshi Nakayama

Tatsuhiko Hongu

Tokuji Abe

Kiyoshi Shirasuna

Masaie Tohkai

Hiromi Nakabayashi

Mitsugu Saito

Hideaki Kamata

Hidekazu Uehara

Shinobu Hashizume

Toshiaki Nishide

Akio Ohori

Hideaki Ozeki

Masayoshi Yono

Tsutomu Nakamura

Richard W Armentrout

Muneo Kudo

Thomas J Pollock

Kenichi Kato

Morinobu Endo

Yukinori Satoh

Kiyoshi Imai

Toshihiko Nakano

Daichi Todoroki

Toru Nakanishi

Keishiro Tsuda

Keiji Shibata

Kiyoyuki Mutoh

Akihito Tsukuno

Osamu Sodeyama

Morinobu Endou

Hiroyuki Kobayashi

Yoshimi Ogushi

Yoshio Tomizawa

Kenji Fushimi

Yasuaki Nozawa

Yoshitada Hata

Nobuyuki Hiraishi

Yukio Shimura

Ken-ichi Kato

Niichiro Suzuki

Nobuhiro Ohta

Shigeru Tateno

Tomoya Ogata

Hisashi Konishi

Tomoyoshi Koike

Tomio Iwase

Michiaki Sezai

Yasuhito Mohara

Kenji O&otilde;ka

Hirokazu Norma

A method for manufacturing granulated silica. The method includes granulating silica powders each having a primary particle size of 5 to 50 nm by use of water, and hydrophobizing each surface of the silica powders with a silicon atom-containing hydrophobizing agent before or simultaneously with the granulation step.

Method for manufacturing granulated silica

Silicon oxide particles each comprising an inner portion having an iron content of 10-1,000 ppm and an outer portion having an iron content of up to 30 ppm are suitable as negative electrode active material in nonaqueous electrolyte secondary batteries. Using a negative electrode comprising the silicon oxide particles as active material, a lithium ion secondary battery or electrochemical capacitor having a high capacity and improved cycle performance can be constructed.

Silicon oxide particles, making method, lithium ion secondary battery, and electrochemical capacitor

A silicon oxide material having a cobalt content of 2-200 ppm is provided. A negative electrode is formed using the silicon oxide material as active material. A nonaqueous electrolyte secondary battery constructed using the negative electrode exhibits improved cycle performance while maintaining the high battery capacity and low volume expansion of silicon oxide.

Silicon oxide material, making method, negative electrode, lithium ion secondary battery, and electrochemical capacitor

Particulate silicon oxide having a Cu content of 100-20,000 ppm, an Fe content of 20-1,000 ppm, an Al content of up to 1,000 ppm, an average particle size of 0.1-30 &#x3bc;m, and a BET specific surface area of 0.5-30 m/g is used as negative electrode material in constructing a nonaqueous electrolyte secondary battery. The secondary battery is improved in cycle performance while maintaining the high battery capacity and low volume expansion of silicon oxide.

Silicon oxide, making method, negative electrode, lithium ion secondary battery, and electrochemical capacitor

By using a halogen-free siloxane and an organometallic compound containing at least one metal other than silicon as feed stocks, and simultaneously atomizing and burning them in a flame, spherical particles of silica-containing compound oxide are prepared which are substantially halogen-free, consist of 0.5-99% by weight of metal oxides and the balance of silica, and have a particle size of 10 nm to 3 &#x3bc;m. The particles are useful as a filler in epoxy resin base semiconductor sealants, a refractive index modifier or the like.

Spherical particles of silica-containing compound oxide and method of production

A silicon oxide powder can be continuously prepared by feeding a raw material powder mixture containing silicon dioxide powder into a reaction chamber () at a temperature of 1,100-1,600&#xb0; C., to produce a silicon oxide gas, transferring the silicon oxide gas to a deposition chamber () through a transfer conduit () maintained at a temperature of from higher than 1,000&#xb0; C. to 1,300&#xb0; C., causing silicon oxide to deposit on a substrate () which is disposed and cooled in the deposition chamber, scraping the silicon oxide deposit, and recovering the deposit in a recovery chamber (). The method and apparatus is capable of continuous and stable production of amorphous silicon oxide powder of high purity.

Apparatus for the continuous production of silicon oxide powder

A non-aqueous electrolyte secondary battery negative electrode material is provided wherein a negative electrode active material containing a lithium ion-occluding and releasing material which has been treated with an organosilicon base surface treating agent is surface coated with a conductive coating. Using the negative electrode material, a lithium ion secondary battery having a high capacity and improved cycle performance is obtainable.

Non-aqueous electrolyte secondary battery negative electrode material, making method, and lithium ion secondary battery

A hydrophobic silica fine powder is prepared by premixing a hydrophilic silica fine powder with a dimer diol siloxane or cyclic siloxane as a hydrophobizing agent, mixing them in a ball mill for achieving dispersion and for achieving cleavage or disintegration and consolidation, and thereafter heating at 100-300&#xb0; C. in an ammonia or amine-containing atmosphere. The powder has an aerated bulk density of 100-300 g/l, a specific surface area of 40-300 m/g, a primary particle diameter of 10-120 nm, and a degree of hydrophobization of 40-80 as measured by methanol titration and is less bulky, easy to handle and disperse and stable in a kneaded mixture.

Hydrophobic silica fine powder and making method

A conductive silicon composite in which particles of the structure that silicon crystallites are dispersed in silicon dioxide are coated on their surfaces with carbon affords satisfactory cycle performance when used as the negative electrode material in a non-aqueous electrolyte secondary cell.

Conductive silicon composite, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell

In a Rochow process, organohalosilanes are prepared by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst and a co-catalyst. The invention uses as the co-catalyst a powder of co-catalyst active element-copper alloy containing substantial strain energy because this co-catalyst can reduce the activation time taken until a steady state is reached, which has been an outstanding problem in Rochow reaction, maintain the steady state over time and increase the selectivity of desired diorganodihalosilane for eventually increasing the yield based on the starting silicon.

Co-catalyst and process for the preparation of organohalosilanes

Particulate silica is prepared by feeding a gas mixture of an organohalosilane gas, a flammable gas capable of generating water vapor when burned, and a free oxygen-containing gas to a reaction chamber through a multiple-tube burner, whereby the organohalosilane is subjected to flame hydrolysis and oxidation reaction. The amount of the flammable gas fed is 0.5-9 mol per mol of the organohalosilane and such that the amount of water vapor resulting from combustion of the flammable gas is 1-6 times the stoichiometric amount, and the gas mixture is fed to the center tube of the burner such that it may have a linear velocity at the outlet of 50-120 m/sec, calculated in the standard state. The resulting silica has a surface area of 100-400 m/g and a narrow particle size distribution of primary particles and ensures the transparency of silicone rubber filled therewith.

Particulate silica and its preparation

A lithium ion secondary cell having a high capacity, improved first charge/discharge efficiency and improved cycle performance is obtainable using as the negative electrode material a lithium-containing silicon oxide powder having the formula: SiLiOwherein x and y are 0&#x3c;x&#x3c;1.0 and 0&#x3c;y&#x3c;1.5, with the lithium being fused and partially crystallized.

Lithium-containing silicon oxide powder and making method

In an industrial process for preparing organohalosilanes by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst, a contact mass composed of the metallic silicon and the catalyst further contains an effective amount of a phosphine chalcogenide compound. The invention drastically increases the silane formation rate and the utilization of silicon without lowering the selectivity of useful silane.

Preparation of organohalosilanes

A silicon oxide powder can be continuously prepared by feeding a raw material powder mixture containing silicon dioxide powder into a reaction chamber ( ) at a temperature of 1,100-1,600&deg; C., to produce a silicon oxide gas, transferring the silicon oxide gas to a deposition chamber ( ) through a transfer conduit ( ) maintained at a temperature of from higher than 1,000&deg; C. to 1,300&deg; C., causing silicon oxide to deposit on a substrate ( ) which is disposed and cooled in the deposition chamber, scraping the silicon oxide deposit, and recovering the deposit in a recovery chamber ( ). The method and apparatus is capable of continuous and stable production of amorphous silicon oxide powder of high purity.

Method for the continuous production of silicon oxide powder

Growing community of inventors

Annaka, Japan

Susumu Ueno