LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMISSION DEVICE

Title:

LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMISSION DEVICE

Document Type and Number:

WIPO Patent Application WO/2018/079373

Kind Code:

A1

Abstract:

A light wavelength conversion member which can achieve both high fluorescence intensity and high color homogeneity, and a light emission device are provided. In this light wavelength conversion member 1, A and B in A3B5O12 are at least one element selected from the following element groups: A: Sc, Y, lanthanoids (except Ce) B: Al, Ga From N A3B5O12:Ce crystal grains in a 20μm square cross-section of a ceramic sintered body, defining a as the number thereof that are present inside of anAl2O3 crystal grain, b as the number thereof present on an Al2O3 grain boundary without touching another A3B5O12:Ce crystal grain, and c as the number present on an Al2O3 grain boundary and touching one or more otherA3B5O12:Ce crystal grains, and defining X, Y and Z as the ratios of said numbers to the total, i.e., a/N, b/N, c/N, respectively, the ratios satisfy the following ranges. 0% ≤ X ≤ 25% 9% ≤ Y ≤ 45% 48% ≤ Z ≤ 90%

Inventors:

MOTEKI JUN (JP)
TAKAKU SHOHEI (JP)
KATSU YUSUKE (JP)
MITSUOKA TAKESHI (JP)
ITO TSUNEYUKI (JP)

Application Number:

PCT/JP2017/037679

Publication Date:

May 03, 2018

Filing Date:

October 18, 2017

Export Citation:

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Assignee:

NGK SPARK PLUG CO (JP)

International Classes:

G02B5/20; C04B35/50; C09K11/80; H01L33/50

Domestic Patent References:

WO2006001316A1	2006-01-05
WO2011125422A1	2011-10-13
WO2016117623A1	2016-07-28
WO2011102566A1	2011-08-25
WO2017170609A1	2017-10-05

Foreign References:

JP2012062459A	2012-03-29
JP2013147643A	2013-08-01
JP5088977B2	2012-12-05
JP5153014B2	2013-02-27
JPS5740017B2	1982-08-25

Other References: