Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
ALUMINA MATERIAL, TRANSLUCENT ALUMINA PORCELAIN, AND LED ILLUMINATION
PROBLEM TO BE SOLVED: To provide an alumina material for restraining transmission of blue light, translucent alumina porcelain, and an LED illumination.SOLUTION: The alumina material contains 99.7 mass% or more of AlO, 0.1-10 ppm of Cr in terms of the oxide thereof (CrO), and 0.1-10 ppm of Ni in terms of the oxide thereof (NiO) and has 25% or higher of an average value A1 of spectral absorptivities at 380-500 nm wavelength. The translucent alumina porcelain has the same composition as that of the alumina material and alumina crystal grains and grain boundaries and 0.5% or smaller porosity. When the average value of the spectral transmissivities at 380-500 nm wavelength is defined as T1 and that of the spectral transmissivities at 500-780 nm wavelength is defined as T2, T2 is 25% or higher and T1 is 65% or lower of T2.SELECTED DRAWING: Figure 1
【課題】 ブルーライトの透過を抑制するアルミナ材料、透光性アルミナ磁器およびＬＥＤ照明を提供する。【解決手段】 Ａｌ２Ｏ３を９９．７質量％以上、ＣｒおよびＮｉをそれぞれ酸化物換算（Ｃｒ２Ｏ３、ＮｉＯ）で０．１ｐｐｍ以上１０ｐｐｍ以下含有するとともに、波長３８０〜５００ｎｍの分光吸収率の平均値Ａ１が、２５％以上のアルミナ材料、または同様な組成でアルミナ結晶粒子と粒界とを有し、気孔率が０．５％以下、波長３８０〜５００ｎｍの分光透過率の平均値をＴ１、波長５００〜７８０ｎｍの分光透過率の平均値をＴ２としたとき、該Ｔ２が２５％以上、かつ前記Ｔ１が前記Ｔ２の６５％以下の透光性アルミナ磁器とする。【選択図】 図１
ALUMINA MATERIAL, TRANSLUCENT ALUMINA PORCELAIN, AND LED ILLUMINATION
PROBLEM TO BE SOLVED: To provide an alumina material for restraining transmission of blue light, translucent alumina porcelain, and an LED illumination.SOLUTION: The alumina material contains 99.7 mass% or more of AlO, 0.1-10 ppm of Cr in terms of the oxide thereof (CrO), and 0.1-10 ppm of Ni in terms of the oxide thereof (NiO) and has 25% or higher of an average value A1 of spectral absorptivities at 380-500 nm wavelength. The translucent alumina porcelain has the same composition as that of the alumina material and alumina crystal grains and grain boundaries and 0.5% or smaller porosity. When the average value of the spectral transmissivities at 380-500 nm wavelength is defined as T1 and that of the spectral transmissivities at 500-780 nm wavelength is defined as T2, T2 is 25% or higher and T1 is 65% or lower of T2.SELECTED DRAWING: Figure 1
【課題】 ブルーライトの透過を抑制するアルミナ材料、透光性アルミナ磁器およびＬＥＤ照明を提供する。【解決手段】 Ａｌ２Ｏ３を９９．７質量％以上、ＣｒおよびＮｉをそれぞれ酸化物換算（Ｃｒ２Ｏ３、ＮｉＯ）で０．１ｐｐｍ以上１０ｐｐｍ以下含有するとともに、波長３８０〜５００ｎｍの分光吸収率の平均値Ａ１が、２５％以上のアルミナ材料、または同様な組成でアルミナ結晶粒子と粒界とを有し、気孔率が０．５％以下、波長３８０〜５００ｎｍの分光透過率の平均値をＴ１、波長５００〜７８０ｎｍの分光透過率の平均値をＴ２としたとき、該Ｔ２が２５％以上、かつ前記Ｔ１が前記Ｔ２の６５％以下の透光性アルミナ磁器とする。【選択図】 図１
ALUMINA MATERIAL, TRANSLUCENT ALUMINA PORCELAIN, AND LED ILLUMINATION
アルミナ材料、透光性アルミナ磁器、およびＬＥＤ照明
NAGATA KENICHI (Autor:in) / FURUSE TATSUJI (Autor:in)
05.09.2016
Patent
Elektronische Ressource
Japanisch
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