Denki Kagaku Kogyo Kabushiki Kaisha

Denka Company Limited

Yasuhito Fushii

Keita Kobayashi

Suzuya Yamada

Kohki Ichikawa

Etsuo Sakai

Miyuki Nakamura

Hideyuku Emoto

Akira Miyai

Yukihiko Nakajima

Yoshihiko Tsujimura

Kazuo Kato

Kazuyuki Hiruta

Yukio Shibayama

Kazuhiro Kaizaki

Tutomu Kida

Yukio Sasagawa

An object of the invention is to provide a phosphor that emits a light containing much red and green light components and a light-emitting device and a lighting apparatus comprising the phosphor that have favorable color rendering properties. An oxide nitride phosphor having a garnet structure represented by Formula [1]: AAlC:Ce, in Formula [1], A=(Lu,Y), a+b=1, 0&#x3c;a&#x3c;1, 0&#x3c;b&#x3c;1, C&#x2550;(O,N), 10&#x2266;c+d&#x2266;16, 1.4&#x2266;c/d, 2&#x2266;w+z&#x2266;4, 4.0&#x3c;x&#x2266;7.0); the molar ratio of Ce/A is &#x2267;0.015 and the nitrogen content is 0.007 mass % or more.

Phosphor, light emitting device and lighting apparatus

A high-brightness phosphor having high-temperature characteristics and long-term reliability, and a white light-emitting device using this phosphor are provided. The phosphor contains a silicate phosphor (A) having a peak wavelength of at least 525 nm but not higher than 535 nm and fluorescence intensity of at least 250% but not higher than 270%; an oxynitride phosphor (B) having a peak wavelength of at least 540 nm but not higher than 545 nm and fluorescence intensity of at least 260% but not higher than 280%; and an nitride phosphor (C) having a peak wavelength of at least 615 nm but not higher than 625 nm, wherein the amount of the silicate phosphor (A) is at least 20% but not higher than 35% by mass, the amount of the oxynitride phosphor (B) is at least 50% but not higher than 70% by mass, and the amount of the nitride phosphor (C) is at least 10% but not higher than 20% by mass.

Phosphor and light-emitting device

A high-brightness phosphor having high-temperature characteristics and long-term reliability, and a white light-emitting device using this phosphor are provided. The phosphor contains a silicate phosphor (A) having a peak wavelength of at least 525 nm but not higher than 535 nm and fluorescence intensity of at least 250% but not higher than 270%; an oxynitride phosphor (B) having a peak wavelength of at least 540 nm but not higher than 545 nm and fluorescence intensity of at least 260% but not higher than 280%; and an oxynitride phosphor (C) having a peak wavelength of at least 645 nm but not higher than 655 nm, wherein the amount of the silicate phosphor (A) is at least 20% but not higher than 35% by mass, the amount of the oxynitride phosphor (B) is at least 50% but not higher than 70% by mass, and the amount of the oxynitride phosphor (C) is at least 10% but not higher than 20% by mass.

Phosphor for light-emitting device

An article comprising a metal circuit and/or a heat-radiating metal plate formed on a ceramic substrate, wherein the metal circuit and/or the heat-radiating metal plate comprise either (1) the following first metal-second metal bonded product, wherein the first metal and the second metal are different, or (2) the following first metal-third metal-second metal bonded product, and wherein in (1) and (2), the first metal is bonded to the ceramic substrate; first metal: a metal selected from the group consisting of aluminum (Al), lead (Pb), platinum (Pt) and an alloy containing at least one of these metal components; second metal: a metal selected from the group consisting of copper (Cu), silver (Ag), gold (Au), aluminum (Al) and an alloy containing at least one of these metal components; and third metal: a metal selected from the group consisting of titanium (Ti), nickel (Ni), zirconium (Zr), molybdenum (Mo), tungsten (W) and an alloy containing at least one of these metal components.

Substrate

Method for forming a ceramic circuit board by forming a metal circuit pattern on a ceramic board through an active metal ingredient-containing brazing material and removing an unnecessary part of the brazing material by chemical liquor treatment.

Method for forming a ceramic circuit board

This invention is directed to a hydraulic material composition having high strength. The composition contains a hydraulic material, an ultra-fine particle, a water reducing agent and water. The hydraulic material contains 0 to 16.5% by weight of an aluminate phase consisting essentially of 3CaO.Al.sub.2 O.sub.3 and 4CaO.Al.sub.2 O.sub.3.Fe.sub.2 O.sub.3.

Hydraulic material composition having high strength

A hydraulic material composition having high strength contains a hydraulic material containing as main ingredients an alkaline earth metal oxide and aluminum oxide (Al.sub.2 O.sub.3), ultra-fine particles having a mean particle size smaller by one order or more than that of the hydraulic material, a metal aggregate and a plasticizer.

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Omuta, Japan

Yasuhito Fushii