GB1232570A - - Google Patents

Info

Publication number
GB1232570A
GB1232570A GB1232570DA GB1232570A GB 1232570 A GB1232570 A GB 1232570A GB 1232570D A GB1232570D A GB 1232570DA GB 1232570 A GB1232570 A GB 1232570A
Authority
GB
United Kingdom
Prior art keywords
march
fluoride
oxalate
luminescent
ryf
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1232570A publication Critical patent/GB1232570A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7772—Halogenides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen

Abstract

1,232,570. Luminescent materials. GENERAL ELECTRIC CO. 10 March, 1969 [28 March, 1968; 18 Sept., 1968], No. 12468/69. Heading C4S. A luminescent fluoride of La, Gd, Y or Lu is activated by Er and/or Tm and also contains Yb. It has a formula Ln 1-x-y Yb x RyF 3 where Ln is La, Gd, Y or Lu; R is Er or Tm; 0À8> x >0À04 and 0À1>y>0À00005. LaF 3 : Yb, Er is prepared by dissolving the rare earth oxides in HNO 3 , adding oxalic acid to precipitate oxalate, then heating the oxalate first in air to form the oxide then in HF and N 2 to form the fluoride. Alternatively mixed fluorides are heated in inert or HF atmosphere. The phosphors emit visible light when excited by infra red radiation by a double excitation process.
GB1232570D 1968-03-28 1969-03-10 Expired GB1232570A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71689868A 1968-03-28 1968-03-28
US76703868A 1968-09-18 1968-09-18

Publications (1)

Publication Number Publication Date
GB1232570A true GB1232570A (en) 1971-05-19

Family

ID=27109620

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1232570D Expired GB1232570A (en) 1968-03-28 1969-03-10

Country Status (5)

Country Link
JP (1) JPS4938431B1 (en)
BE (1) BE730564A (en)
DE (1) DE1915288B2 (en)
FR (1) FR2004990A1 (en)
GB (1) GB1232570A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999016009A1 (en) * 1997-09-26 1999-04-01 Iomega Corporation Latent illuminance discrimination marker and system for data storage cartridges
US6181662B1 (en) 1997-09-26 2001-01-30 Iomega Corporation Latent irradiance discrimination method and marker system for cartridgeless data storage disks
US6201662B1 (en) 1998-09-25 2001-03-13 Iomega Corporation Latent illuminance discrimination marker with reflective layer for data storage cartridges
US6297924B1 (en) 1998-11-13 2001-10-02 Iomega Corporation System and method for cartridge detection and verification using signal comparison
US6359745B1 (en) 1997-09-26 2002-03-19 Iomega Corporation Latent illuminance discrimination marker system for data storage cartridges

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997046488A1 (en) * 1996-06-05 1997-12-11 Sarnoff Corporation Method for preparing small particle size fluoride up-converting phosphors
US6039894A (en) * 1997-12-05 2000-03-21 Sri International Production of substantially monodisperse phosphor particles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999016009A1 (en) * 1997-09-26 1999-04-01 Iomega Corporation Latent illuminance discrimination marker and system for data storage cartridges
US6091563A (en) * 1997-09-26 2000-07-18 Iomega Corporation Latent illuminance discrimination marker system for data storage cartridges
US6181662B1 (en) 1997-09-26 2001-01-30 Iomega Corporation Latent irradiance discrimination method and marker system for cartridgeless data storage disks
US6359745B1 (en) 1997-09-26 2002-03-19 Iomega Corporation Latent illuminance discrimination marker system for data storage cartridges
US6201662B1 (en) 1998-09-25 2001-03-13 Iomega Corporation Latent illuminance discrimination marker with reflective layer for data storage cartridges
US6297924B1 (en) 1998-11-13 2001-10-02 Iomega Corporation System and method for cartridge detection and verification using signal comparison

Also Published As

Publication number Publication date
DE1915288B2 (en) 1971-06-03
DE1915288A1 (en) 1969-11-27
FR2004990A1 (en) 1969-12-05
BE730564A (en) 1969-09-01
JPS4938431B1 (en) 1974-10-17

Similar Documents

Publication Publication Date Title
US3322682A (en) Rare earth oxide and vanadate phosphors
GB1208368A (en) Rare earth activated lanthanum and lutetium oxy-chalcogenide phosphors
GB1178097A (en) Yttrium Silicate Phosphors
JP2001064638A (en) Stress luminescent material and its production
US3541018A (en) Infrared-excitable ytterbium sensitized erbium or thulium activated rare earth flouride luminescent material
GB1453991A (en) Luminescent materials
GB1232570A (en)
US3758486A (en) Rare earth niobate composition
GB1177316A (en) Fluorescent Phosphor
GB1127166A (en) Process for preparing phosphors
GB1419169A (en) Luminescent materials
Yocom et al. Rare-earth-doped oxysulfides for GaAs-pumped luminescent devices
GB1248299A (en) Improvements in infrared-excitable rare earth oxysulfide luminescent materials
GB1536637A (en) Luminescent materials
GB1205659A (en) Luminescent materials
GB1208565A (en) Improvements in and relating to phosphors
GB1046569A (en) Improvements relating to luminescent materials
GB1337888A (en) Europium-activated alkaline earth calcium aluminum fluoride phosphors
GB1193320A (en) Alkaline Earth Tellurate Phosphors
GB1537330A (en) Luminescent materials
JP3264045B2 (en) Phosphor manufacturing method
GB1205298A (en) Luminescent materials
Mo et al. Comparative study of sensitization of the luminescence of trivalent rare earth ions by Ce3+ in LaOBr
GB1333177A (en) Luminescent materials
US3513105A (en) Luminescent materials

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees