Toto Ltd.

Koji Omoshiki

Junji Kameshima

Makoto Hayakawa

Mitsuyoshi Kanno

Satoru Kitazaki

Yoji Takaki

Hironaga Iwata

Yuki Tanaka

Katsuhisa Tsuchiya

Toshiharu Otsuka

Takuya Matsuo

Yousuke Akagi

Yasuo Kakinuma

Megumi Shimazu

Chihiro Kobayashi

Hiroyuki Fujii

Akira Ueno

Susumu Adachi

Masanobu Aizawa

Mitsunobu Shiono

Haruo Nishiyama

Ken-ichi Hiwatashi

To provide a solid oxide fuel cell system capable of avoiding the reduction of air electrodes. The present invention is a solid oxide fuel cell system including: a fuel cell module, a fuel supply apparatus, a water supply apparatus, an oxidant gas supply apparatus, a reformer, and a control section for controlling the extraction of power, whereby the controller having a shutdown stop circuit for executing a shutdown stop when the fuel cell stack is above the predetermined temperature, and after a shutdown stop, during a period when pressure on the fuel electrode side is sufficiently higher than pressure on the air electrode side, and no reverse flow of oxidant gas to the fuel electrode side is occurring, a temperature drop operation is executed whereby high temperature oxidant gas remaining on the oxidant gas electrode side is discharged.

Solid oxide fuel cell system

A photocatalyst coated body includes a base and a photocatalyst layer provided on the base. The photocatalyst coated body is characterized in that photocatalyst layer contains 1-20 (inclusive) parts by mass of photocatalyst particles, 30-98 (inclusive) parts by mass of silica particles and 1-50 (inclusive) parts by mass of zirconia particles, so that the total all of these particles is 100 parts by mass. The photocatalyst coated body is also characterized in that the zirconia particles are at least one kind of particles selected from the group consisting of crystalline zirconia particles having an average crystallite diameter of 10 nm or less and amorphous zirconia particles. Such photocatalyst coated body has excellent photocatalytic degradation function and excellent weather resistance; and also it is capable of suppressing the formation of intermediate products such as NO, while increasing the amount of NOremoved during removal of NOin the air.

Photocatalyst coated body and photocatalyst coating liquid

A photocatalyst-coated body comprises a substrate and a photocatalyst layer provided on the substrate, the photocatalyst layer comprising photocatalyst particles of 1 part or more by mass and less than 20 parts by mass, inorganic oxide particles of 70 parts or more by mass and less than 99 parts by mass, and the dried substance of a hydrolyzable silicone of zero parts or more by mass and less than 10 parts by mass, provided that a total amount of the photocatalyst particles, the dried substance of the inorganic oxide particles and the hydrolyzable silicone is 100 parts by mass in terms of silica. The inorganic oxide particles have a number average particle diameter ranging from 10 nm or more to less than 40 nm calculated by measuring lengths of 100 particles randomly selected from particles located within a visible field magnified 200,000 times by a scanning electron microscope.

Photocatalyst-coated body and photocatalytic coating liquid therefor

A photocatalyst-coated body includes a substrate with an organic material as a surface thereof, a photocatalyst layer with interstices between the particles in the layer and an intermediate layer provided between the substrate and the photocatalyst layer. The photocatalyst layer includes photocatalyst particles in a range of 1 part&#x2266;x&#x3c;20 parts by mass, inorganic oxide particles in a range of 70 parts&#x2266;y&#x3c;99 parts by mass, and a dried substance of a hydrolyzable silicone in a range of zero parts&#x2266;z&#x3c;10 parts by mass, provided that a total amount of the photocatalyst particles, the inorganic oxide particles, and the dried substance of the hydrolyzable silicone is 100 parts by mass in terms of silica. The intermediate layer comprising a silicone-modified resin, wherein the silicone-modified resin includes silicon atom in an amount of 0.2% by mass or more and less than 16.5% by mass.

Photocatalyst-coated body, coating composition for the same, and process for producing photocatalyst-coated body

A photocatalyst-coated body comprises a substrate and a photocatalyst layer provided on the substrate, the photocatalyst layer comprising photocatalyst particles of 1 part or more by mass and less than 20 parts by mass, inorganic oxide particles of 70 parts or more by mass and less than 99 parts by mass, and the dried substance of a hydrolyzable silicone of zero parts or more by mass and less than 10 parts by mass, provided that a total amount of the photocatalyst particles, the dried substance of the inorganic oxide particles and the hydrolyzable silicone is 100 parts by mass in terms of silica, wherein the photocatalyst layer has a film thickness of 3.0 &#x3bc;m or less.

There is disclosed a photocatalyst-coated body which is superior in weather resistance, noxious gas decomposability, and various coating properties (such as ultraviolet absorptivity, transparency and film strength) while preventing corrosion of a substrate (in particular an organic substrate), and a photocatalyst coating liquid therefor. The photocatalyst-coated body comprises a substrate and a photocatalyst layer provided on the substrate. The photocatalyst layer comprises photocatalyst particles of 1 part or more by mass and less than 20 parts by mass; inorganic oxide particles of 70 parts or more by mass and less than 99 parts by mass; and a hydrolyzable silicone of zero parts or more by mass and less than 10 parts by mass, provided that a total amount of the photocatalyst particles, the inorganic oxide particles and the hydrolyzable silicone is 100 parts by mass.

A photocatalyst-coated body and a photocatalytic coating liquid which exert an excellent weather resistance, harmful gas decomposability, and other desired characteristics (such as transparency and film strength), while preventing erosion of the substrate are provided. The photocatalyst-coated body comprises a substrate and a photocatalytic layer provided on the substrate. The photocatalytic layer comprises photocatalytic particles and inorganic oxide particles, and has interstices between the particles in the layer.

Photocatalyst-coated body and photocatalytic coating liquid for the same

A solid electrolyte fuel cell comprising an air electrode, a solid electrolyte film, a fuel electrode, and an interconnector, wherein a ceramics layer which is tight in a certain degree and has a gas permeation flux Q &lE;50 (m&middot;hr &middot;atm ) is provided on the air electrode, and an interconnector film which is a tight ceramics film is provided thereon whereby the gas permeation flux Q of the interconnector film becomes 0.01 (m&middot;hr &middot;atm ) or less so that a gas-permeability preferable as an interconnector film of the solid electrolyte type fuel cell can be ensured.

Growing community of inventors

Kanagawa-ken, Japan

Koji Omoshiki