Ngk Spark Plug Company, Limited

Ngk Insulators, Inc.

Daido Steel Co., Ltd.

Yuichi Murakami

Tadashi Hattori

Hitoshi Yokoi

Yasuyuki Okimura

Atsushi Satsuma

Takafumi Oshima

Noboru Ishida

Kazushige Ohbayashi

Ryuji Inoue

Satoshi Sugaya

Akihiko Saito

Shiro Kakimoto

Katsuhiro Tokura

Hiroyuki Nishiyama

Yu Nakama

Koichi Imaeda

Takayuki Mori

Hideaki Muramatsu

Mikiko Tsutsui

The present invention relates to an electromagnetic wave absorbing body which is a sheet-like electromagnetic wave absorbing body in which particles including a soft magnetic material are dispersed in a matrix including a non-metal material, in which the electromagnetic wave absorbing body satisfies a relationship: &#x3b1;&#x2265;&#x2155;, in which &#x3b1; is a parameter given by Equation (1): &#x3b1;=Ad(&#x3b5;&#x3bc;)/(&#x3bc;&#x2033;+&#x3b5;&#x2033;&#x3bc;/&#x3b5;), in which d is a thickness of the electromagnetic wave absorbing body, &#x3b5;, &#x3b5;&#x2033;, &#x3bc;, and &#x3bc;&#x2033; are a permittivity of the electromagnetic wave absorbing body, a loss term of &#x3b5;, a permeability of the electromagnetic wave absorbing body, and a loss term of &#x3bc;, respectively, and A is equal to 8&#xd7;10/&#x3c0;(&#x3a9;/m).

Electromagnetic wave absorbing body and method for manufacturing electromagnetic wave absorbing body

In an ammonia sensor (), lead portions () and () are provided on an insulating substrate (); a pair of comb-shaped electrodes () and () are connected to the lead portions () and (), respectively; a sensitive layer () is provided on the comb-shaped electrodes () and (); and a protective layer () is provided on the sensitive layer (). Particularly, the sensitive layer () is formed of a gas-sensitive raw material predominantly containing ZrOand containing at least W in an amount of 2 to 40 wt. % as reduced to WO.

Ammonia sensor

Process for removing nitrous oxide (N.sub.2 O)

A nitrogen oxide absorbing material, comprising a hollandite-type complex oxide having main metal elements comprising minimally of aluminum and tin, or zinc and tin, and a method of using that nitrogen oxide absorbing material comprising the steps of contacting the nitrogen oxide absorbing material with a gas containing nitrogen oxides. The method of reducing the adsorbed nitrogen oxides on the nitrogen oxide absorbing material includes the steps of releasing the nitrogen oxides from the nitrogen oxide absorbing material, and of reducing the released nitrogen oxides with a three way catalyst or other nitrogen oxide reducing catalysts.

Method of removing nitrogen oxides using material for absorbing nitrogen

A catalytic material for removing nitrogen oxides comprises a complex oxide as main phase. The complex oxide has a spinel structure and contains metallic elements of Al, Ga, and Zn. The mole fraction x (%) of Zn on oxide basis is greater than 0 and less than 50. Nitrogen-oxides-containing gas and a reductant such as methane or propylene are brought into contact with the catalytic material so as to remove, through reduction, nitrogen oxides from the nitrogen-oxides-containing gas. The catalytic material can be used to remove nitrogen oxides contained in exhaust gas from an automobile or the like. The catalytic material can remove nitrogen oxides even in exhaust gas of a high oxygen concentration and requires no toxic reductant such as ammonia.

Catalytic material for removing nitrogen oxides apparatus for treating

Material for absorbing nitrogen oxides comprising hollandite-type

Growing community of inventors

Nagoya, Japan

Tadashi Hattori