Ngk Insulators, Inc.

Makoto Murai

Yoshihiro Sato

Tomonori Takahashi

Tsuneaki Ohashi

Hirotake Yamada

Yasufumi Aihara

Masanari Iwade

Akihiko Yoshida

Hiroshi Furukubo

Shinji Kawasaki

Yasumasa Fujioka

Shuji Ueda

Takafumi Terahai

Akifumi Nishio

Yuji Watanabe

Shungo Nagai

Ryota Kurahashi

Yutaka Ishii

Kazunari Akita

Takayoshi Shibayama

Kojiro Hayashi

Takakazu Koyama

Takaaki Kanemitsu

Kenji Ebisutani

Akinari Fukaya

An inspection method for a pillar-shaped honeycomb filter having a honeycomb-shaped first end face and a honeycomb-shaped second end face, including:

Inspection method for pillar-shaped honeycomb filter

A circumferential coating material which is coated on a circumferential surface of a honeycomb structure monolithically formed by extrusion, to form a circumferential coating layer, the circumferential coating material containing fused silica in a range of 20 to 75 mass %, containing a color developing agent in a range of 5 to 50 mass %, containing colloidal silica in a range of 5 to 30 mass %, and further containing a silicon based water repellent agent in a range of 1 to 10 mass % to a total mass of the fused silica, the color developing agent, and the colloidal silica.

Circumferential coating material and circumferential coating honeycomb structure

A circumferential coating material contains colloidal silica, silicon carbide, and titanium oxide different in particle diameters from silicon carbide, coats a circumferential surface of a honeycomb structure monolithically formed by extrusion, including as a main component, cordierite having a porosity of 50 to 75%, and forms a circumferential coating layer. A circumferentially coated honeycomb structure has a honeycomb structure comprising latticed porous partition walls defining and forming a plurality of polygonal cells forming through channels and extending from one end face to the other end face, and a circumferential coating layer formed by coating at least a part of a circumferential surface of the honeycomb structure with the circumferential coating material.

Circumferential coating material and circumferentially coated honeycomb structure

To provide a technique related to a marking base that allows clear marking by ink and is excellent in thermal resistance and chemical resistance. A marking base composition contains inorganic particles of 27 to 50 mass %, an inorganic binder of 5 to 20 mass %, an organic binder of 3 to 16 mass %, a thermal expansion resin of 1 to 3 mass %, and an organic solvent.

Marking base composition and marking base using the same

A silicon carbide body includes polycrystals of silicon carbide, and has a purity of silicon carbide of not less than 99.9999 wt %, a relative density of not less than 99% and a ratio of silicon of not less than 70.12 wt %.

Silicon carbide body

A method for producing a silicon carbide body, includes the steps of forming a silicon carbide mass by chemical vapor deposition, and thermally treating the silicon carbide mass under vacuum or in an inert gas atmosphere at a temperature not less than 2000&deg; C., the silicon carbide article having an electric resistivity higher than that of the silicon carbide mass having not been thermally treated.

Production of silicon carbide bodies

In order to improve a reliability of a glass joint body, first ceramic member and second ceramic member are connected by using (a) glass consisting of 10.about.65 wt % of SiO.sub.2, 30 wt % or less of Na.sub.20, and the balance of B.sub.2 O.sub.3 and Al.sub.2 O.sub.3, (b) glass including less than 10 wt % of SiO.sub.2, and 30.about.80 wt % of B.sub.2 O.sub.3, (c) glass including substantially none of SiO.sub.2, and 30.about.80 wt % of B.sub.2 O.sub.3, or (d) glass consisting of 10.about.65 wt % of SiO.sub.2, 20 wt % or less of Na.sub.2 O, 30 wt % or less of Al.sub.2 O.sub.3, 20 wt % or less of MgO, and the balance of B.sub.2 O.sub.3.

Glass joint body and method of manufacturing the same

A process for the production of a lanthanum chromite film, including the steps of preparing a plasma spray powder by mixing 1-15 parts by weight of powdery chromium oxide powder to 100 parts by weight of powdery lanthanum chromite, this lanthanum chromite having a composition ratio of A sites to B-sites being in a range of 1:1 to 1:0.9, forming a plasma sprayed film by plasma spraying the plasma spray powder onto a substrate, and forming the lanthanum chromite film by heat treating the resulting plasma sprayed film. The plasma spray powder may be produced by preparing a mixed powder by adding 1-15 parts by weight of powdery chromium oxide to 100 parts by weight of a synthesis powder capable of producing the lanthanum chromite film by heat treatment, the synthesis powder containing at least chromium oxide and lanthanum chromite and the lanthanum chromite film having a composition ratio of A-sites to B-sites being in a range of 1:1 to 1:0.9, obtaining a synthesized product by heating the mixed powder, and granulating the synthesized product.

Process for the production of lanthanum chromite films by plasma spraying

In order to improve the reliability of a glass joint body, a first ceramic member and a second ceramic member are connected by using (a) glass consisting of 10.about.65 wt % of SiO.sub.2, 30 wt % or less of Na.sub.2 O, and the balance of B.sub.2 O.sub.3 and Al.sub.2 O.sub.3, (b) glass including less than 10 wt % of SiO.sub.2, and 30.about.80 wt % of B.sub.2 O.sub.3, (c) glass including substantially none of SiO.sub.2, and 30.about.80 wt % of B.sub.2 O.sub.3, or (d) glass consisting of 10.about.65 wt % of SiO.sub.2, 20 wt % or less of Na.sub.2 O, 30 wt % or less of Al.sub.2 O.sub.3, 20 wt % or less of MgO, and the balance of B.sub.2 O.sub.3.

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Nagoya, Japan

Makoto Murai