Toshiba Ceramics Co., Ltd.

Covalent Materials Corporation

Shiraishi Central Laboratories Co., Ltd.

Otsuka Iron Works, Ltd.

Kansai Zyari Kabushiki-kaisha

Shunzo Shimai

Kenichi Okamoto

Koichi Imura

Kazuhide Kawai

Katsunori Yokoyama

Hideo Uemoto

Fumio Tokuoka

Yukio Sato

Koichi Shiraishi

Kuniko Ando

Tadayoshi Muto

Hiroshi Yamaguchi

Takashi Suzuki

Hidekazu Takahashi

Makoto Takahashi

Toshio Watanabe

Masaru Shimbo

Masahiko Ichishima

Masahiko Tajika

Sousuke Naito

Shota Umemoto

Hiroaki Shitara

Toyokazu Matsuyama

Takashi Matsuyama

Zhonghua Zhou

Ichiro Shibata

Yugo Ito

Akiko Niizuma

Tatsuya Ishii

Yasuji Otsuka

Hiroyuki Kondo

Takashi Koseki

Yawara Ando

Yoshio Saito

Provided is a production method that can easily produce a calcium carbonate porous sintered body. The production method includes the steps of: preparing a dispersion liquid containing calcium carbonate and a gelling agent; adding a foaming agent to the dispersion liquid, followed by stirring until foamy to make a foam; turning the foam into a gel; and sintering the gelled foam to produce a calcium carbonate porous sintered body.

Production method of calcium carbonate porous sintered body

To provide a method for producing a ceramic porous material which has a high strength, though it has a high porosity, and which is excellent in permeability without dust generation. In a ceramic porous material having a three-dimensional mesh-like skeleton structure with a large number of substantially spherical adjacent cells communicating with each other via communication holes, the crystal particle size at the rim of each communication hole in the skeleton structure is provided substantially equal to the crystal particle size in the other parts.

Production method for ceramic porous material

The invention provides titanium dioxide fine particles, wherein nitrogen and at least one element selected from carbon, hydrogen, sulfur doped in titanium dioxide by heat-treating fine particles of a material of titanium dioxide at 500&#xb0; C. or more and 600&#xb0; C. or less in a reducing gas atmosphere containing nitrogen. The titanium fine particles exhibit a high photocatalytic activity than in the conventional art by irradiating a visible light such that they exhibit an isopropanol oxidation activity induced by visible light irradiation with a wavelength of 400 nm or more and 600 nm or less with excellent stability and durability of the photocatalytic activity.

Titanium dioxide fine particles and method for producing the same, and method for producing visible light activatable photocatalyst

The ceramic member of this invention is formed on the surfaces of crystal grains with a plurality of protrusions having smaller diameter than that of the crystal grain, said crystal grain composing at least the surface or its vicinity of a dense ceramic base material of purity being 95 wt % or higher. Such ceramic members may be produced by performing the surface of a dense ceramic base material with a corrosion treatment in an acid etchant, the dense ceramic base material having purity of 95 wt % or higher and exceeding 90% of a theoretical density, whereby ceramic grains existing on the surface or its vicinity of the base material are formed on the surface thereof with a plurality of protrusions.

Ceramic member with fine protrusions on surface and method of producing the same

A ceramic porous body has a layered structure including a plurality of foam-like ceramic layers. The foam-like ceramic layers are formed by firing foam-like ceramic shaped layers each having a thickness of not more than 5 mm. The adjacent shaped layers are joined directly, or bonded via a thin foam-like ceramic layer or dense ceramic layer.

Multi-layered ceramic porous body

A ceramic porous body is constituted of ceramic particles which have a substantially continuous, monotonic size distribution in the thickness direction of the porous body.

Ceramic porous body having a continuous particle size distribution

A cylindrical support member consists of a bone-like porous ceramic member and a ceramic porous network member having a three-dimensional network structure provided outside the bone-like member so as to constitute an integral part. A ceramic membrane having a smaller pore size and serving as a filter membrane is formed on the exposed surface of the bone-like member and the surfaces of the struts of the network member by a ceramic-slurry foaming technique.

Ceramic filter and manufacturing method therefor

A silica glass filter comprises a porous support body composed of amorphous silica particles as a porous sintered body and having a purity of 99.9% or more and containing 150 ppm or less in total of impurities including alkali, alkali metal, heavy metal and/or elements of III B group, and a filtration layer formed on the support body. The filtration layer is composed of amorphous silica particles as a porous sintered body in a fine mode and has substantially the same purity as that of the support body.

Silica glass filter

A piezo-electric device such as a piezo bimorph device includes an intermediate plate, a plate-shaped first piezo ceramic element fixed on one surfaces of the intermediate plate, a plate-shaped second piezo ceramic element fixed on the other surface of the intermediate plate, and a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element. The intermediate plate is made of a hardened tool steel containing carbon from 0.6 to 1.5%, or a fine ceramic material.

Piezo-electric device

A cage mill includes a housing, a disc rotatably supported within the housing, a plurality of support shafts each fixed at one end to the disc so as to form a cage, a band fixed to the other end of each of the support shafts, a plurality of ceramic pins each having a through-hole in which one of the support shafts is placed so as to support one of the ceramic pins, and a plurality of nuts each engaging with a male screw portion of each end of the support shafts for releasably fixing the support shafts and the ceramic pins to the disc and the band. The support shafts and loosely placed in the ceramic pins, respectively, so that the latter can be turned around the former when the nuts are released.

Cage mill

The disclosed process includes making a slip or slurry by mixing alumina powder, water, a deflocculant and a magnesium compound, casting the slip or slurry by drain casting and thereafter firing or sintering same. A coagulant is used as the deflocculant. A tube for a lamp, which is a unitary body of translucent alumina ceramic, has a large-diameter portion located at a central portion of the tube and two small-diameter portions located at both end portions of the tube. The tube is produced by drain casting. The tube has substantially the same wall thickness over its whole length. The inner surface of the tube is more smooth than its outer surface.

Translucent alumina ceramic tube and a process for making same

Growing community of inventors

Tougane, Japan

Shunzo Shimai