Garnet compound and method for producing same, light emitting device and decorative article using garnet compound, and method of using garnet compound

Patent metadata

Field	Value
Publication number	US-2018163127-A1
Application number	US-201615577819-A
Country	US
Kind code	A1
Filing date	Jul 15, 2016
Priority date	Jul 22, 2015
Publication date	Jun 14, 2018
Grant date	—

Abstract

A garnet compound includes a single particle or an aggregation of single particles, each single particle having a particle shape derived from a crystal structure of garnet. The garnet compound has a composition represented by a general formula:
A′ 3 B′ 2 (C′X 4 ) 3   (1)

(where A′, B′, and C′ are cations forming the garnet compound, and X is an anion forming the garnet compound), neither B′ nor C′ containing iron as a main component. The single particle in the garnet compound has a particle size categorized as sand in geology. The garnet compound contains lead in an amount of 1000 ppm or less.

First claim

1 . A garnet compound comprising a single particle or an aggregation of single particles, each single particle having a particle shape derived from a crystal structure of garnet, and having a composition represented by a general formula:
A′ 3 B′ 2 (C′X 4 ) 3   (1)

where A′, B′, and C′ are cations forming the garnet compound, and X is an anion forming the garnet compound, neither B′ nor C′ contains iron as a main component,
wherein the single particle has a particle size categorized as sand in geology, and
a content of lead is 1000 ppm or less.

2 . The garnet compound according to claim 1 , wherein at least one element selected from the group consisting of Hg, Bi, TI, Sb, Sn, Fe, Mn, Cr, B, Ba, Cd, Te, Se, As, Be, In, Ni, Co, and V is contained in an amount of 1000 ppm or less.

3 . The garnet compound according to claim 1 , wherein the single particle has a facet.

4 . The garnet compound according to claim 1 , wherein the garnet compound is a rare earth compound.

5 . The garnet compound according to claim 4 , wherein the garnet compound is rare earth aluminum garnet.

6 . The garnet compound according to claim 1 , wherein the garnet compound emits fluorescence.

7 . The garnet compound according to claim 6 , wherein the garnet compound absorbs visible light having a short wavelength of 380 nm or greater and less than 480 nm and converts the short-wavelength visible light into visible light having a longer wavelength than the short-wavelength visible light.

8 . The garnet compound according to claim 7 , wherein the garnet compound is a phosphor activated by Ce 3+ .

9 . A method for producing the garnet compound according to claim 1 , the method comprising a step of reacting at least a rare earth halide-based compound containing a rare earth element and halogen with an oxide-based compound containing oxygen.

10 . The method according to claim 9 , wherein the rare earth halide-based compound is rare earth fluoride, and the oxide-based compound contains at least an alkali metal compound.

11 . A method for producing the garnet compound according to claim 1 , the method comprising a step of reacting at least fluoride with an alkali metal compound.

12 . A light emitting device comprising the garnet compound according to claim 6 .

13 . A decorative article comprising the garnet compound according to claim 1 as a decorative material.

14 . A method of using the garnet compound according to claim 1 as a decorative material or fluorescent sand.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Oshio Shozo
• Abe Takeshi

Classifications

• H10W74/00

  Encapsulations, e.g. protective coatings · CPC title

• H10W90/00

  Package configurations · CPC title

• C01F17/34

  Aluminates, e.g. YAlO3 or Y3-xGdxAl5O12 · CPC title

• C01P2004/04

  obtained by TEM, STEM, STM or AFM · CPC title

• C01P2006/60

  Optical properties, e.g. expressed in CIELAB-values · CPC title