Kyocera Corporation

Honda Motor Co., Ltd.

Toshiaki Shigeoka

Shoji Kohsaka

Tatsuji Furuse

Hiroaki Seno

Shuichi Kasai

Shuichi Iida

Fujito Nakakawaji

Kouki Okayama

Yusuke Nishikawa

A cordierite sintered body and a member for semiconductor manufacturing apparatus are disclosed. The cordierite sintered body includes a crystal phase and an amorphous phase. The crystal phase includes a main crystal phase that essentially consists of cordierite crystal grains; and a sub crystal phase that includes sub crystal grains containing alumina, mullite or sapphirine. The amorphous phase contains calcium and is located at grain boundaries of the cordierite crystal grains and the sub crystal grains. A crystal phase proportion of the main crystal phase to the crystal phase (or total of the main crystal phase and the sub crystal phase) is 95% to 97.5% by mass or less. A crystal phase proportion of the sub crystal phase to the crystal phase is 2.5% to 5% by mass or less. The sintered body contains calcium by 0.4% to 0.6% by mass or less in terms of CaO.

Cordierite sintered body and member for semiconductor device composed of cordierite sintered body

A phosphor operable to absorb ultraviolet or visible light and emit visible light with longer wavelength and a process for producing same is disclosed. A wavelength converter phosphor material comprising Eu, Mg, Mn, and Si as essential components converts the wavelength of light emitted from a light-emitting element such as a light emitting diode (LED) into a changed wavelength for emission. An illumination device such as a luminaire may be equipped with the wavelength converter.

Phosphor, method for production thereof, wavelength converter, light emitting device and luminaire

Growing community of inventors

Kirishima, Japan

Toshiaki Shigeoka