National Institute of Advanced Industrial Science and Technology

Central Glass Company, Limited

Isuzu Glass Company, Ltd.

Patent Technology Development Inc.

Tetsuo Yazawa

Kohei Kadono

Toshihiko Einishi

Shinji Nishikawa

Tomoko Akai

Takashi Tarumi

Tatsuya Suetsugu

Takashi Yamate

Masaru Yamashita

Norimasa Kominami

Takeshi Ohtani

Hiroaki Yokoi

Minoru Takada

Hiroyuki Tamon

Akira Agata

Kaori Oki

Hiroshi Uemura

A photocatalyst produced from an easily available, relatively low-cost silicon oxide material is disclosed which is capable of decomposing environmental pollutants with improved efficiency. The photocatalyst is produced by pulverizing an artificial crystal, specifically machining waste thereof, into powder particles having a particle diameter of not more than 3.0 mm and then immersing the particles into a solution containing a hydrogen fluoride for activation. Environmental pollutants such as nitrogen oxides (NOx) and harmful organic compounds can be efficiently decomposed by coming into contact with this photocatalyst while being irradiated with activation light under oxidizing conditions.

Photocatalyst and method for producing same

The present invention provides a method for forming an optical waveguide characterized by applying a paste containing a copper compound to a glass substrate containing an alkali metal as a glass component over the whole surface thereof or in a patterned form, and performing heat treatment at a temperature lower than the softening temperature of the glass substrate. The method of the invention can produce an optical waveguide without the need for a high vacuum as in the thin film deposition method and without the use of a molten salt, and is capable of dispersing Cuions selectively in a glass substrate with excellent controllability.

Method for forming optical waveguide

The invention relates to a method for putting color to glass. This method includes the steps of (a) introducing a laser beam into an interferometer such that the laser beam is split into at least first and second laser beams in the interferometer and that the at least first and second laser beams come out of the interferometer; and (b) irradiating a glass with the at least first and second laser beams to write a plurality of lines simultaneously on a surface of the glass and/or in an inside of the glass.

Method for putting color to glass

Growing community of inventors

Osaka, Japan

Tetsuo Yazawa