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1. EP2730636 - Persistent phosphorescent composite material

Office European Patent Office
Application Number 13191505
Application Date 05.11.2013
Publication Number 2730636
Publication Date 14.05.2014
Publication Kind A1
IPC
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
11
Luminescent, e.g. electroluminescent, chemiluminescent, materials
08
containing inorganic luminescent materials
77
containing rare earth metals
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
01
based on oxides
48
based on zirconium or hafnium oxides or zirconates or hafnates
486
Fine ceramics
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
622
Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
626
Preparing or treating the powders individually or as batches
G PHYSICS
04
HOROLOGY
B
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
19
Indicating the time by visual means
30
Illumination of dials or hands
32
by luminescent substances
G PHYSICS
04
HOROLOGY
B
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
39
Watch crystals; Fastening or sealing crystals; Clock glasses
C09K 11/77
C04B 35/486
C04B 35/626
G04B 19/32
G04B 39/00
CPC
C09K 11/7792
C04B 35/44
C04B 35/48
C04B 35/481
C04B 35/486
C04B 35/488
Applicants ROLEX SA
Inventors BERNER DETLEF
GIROD ROMAIN
PUJOL OLLIVIER
RIGOT ISABELLE
Designated States
Priority Data 12191561 07.11.2012 EP
13191505 05.11.2013 EP
Title
(DE) Permanentes phosphoreszierendes Verbundmaterial
(EN) Persistent phosphorescent composite material
(FR) Matériau composite phosphorescent persistant
Abstract
(EN)
The invention relates to a persistent phosphorescent ceramic composite material which is a sintered dense body comprising two or more phases, a first phase consisting of at least one metal oxide and a second phase consisting of a metal oxide containing at least one activating element in a reduced oxidation state. The invention furthermore relates to a method for the preparation of a phosphorescent ceramic composite material as defined in any of the previous claims, the method comprising the following steps: preparing a mixture of a metal oxide and a phosphor; fabricating a green body from the mixture; and heat treating the green body in a reducing atmosphere.