Ube Industries, Inc.

Yoshikatu Harada

Hiroyuki Yamaoka

Toshihiro Ishikawa

Teruaki Fujii

Shinji Kajii

Hidekuni Hayashi

Yoshiyuki Inoue

A silicon carbide fiber having a boron nitride layer in a fiber surface and having the following properties of a to c,

Silicon carbide fiber having boron nitride layer in fiber surface and process for the production thereof

A silica-based photocatalyst fiber having visible-light activity, which fiber comprises a composite oxide phase comprising an oxide phase (first phase) mainly made of a silica component and a titania phase (second phase), wherein the second phase contains a metal element other than titanium and the existent ratio of the second phase slopingly increases towards the surface of the fiber, and a process for the production thereof.

Silica-based photocatalyst fiber having visible-light activity and process for the production thereof

A silica-group composite oxide fiber formed of a composite oxide phase of an oxide phase (first phase) mainly made of a silica component and a metal oxide phase (second phase) excluding silica, in which the existent ratio of at least one metal element of a metal oxide constituting the second phase upward slopingly increases toward the surface layer of the fiber and a process for the production thereof.

Silica-group composite oxide fiber and process for the production thereof

A crystalline silicon carbide fiber excellent not only in mechanical properties but also in alkali durability at high temperatures, which has a density of at least 2.7 g/cm.sup.3, contains 55 to 70% by weight of Si, 30 to 45% by weight of C, 0.06 to 3.8% by weight of Al and 0.06 to 0.5% by weight of B, the total of these elements being 100% by weight, and has a sintered structure of SiC.

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Ube, Japan

Yoshikatu Harada