GB1208565A - Improvements in and relating to phosphors - Google Patents

Improvements in and relating to phosphors

Info

Publication number
GB1208565A
GB1208565A GB45171/66A GB4517166A GB1208565A GB 1208565 A GB1208565 A GB 1208565A GB 45171/66 A GB45171/66 A GB 45171/66A GB 4517166 A GB4517166 A GB 4517166A GB 1208565 A GB1208565 A GB 1208565A
Authority
GB
United Kingdom
Prior art keywords
solution
calcined
yttria
dried
oxides
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
GB45171/66A
Inventor
Brian Sidney Cooper
James Henry Nicholas Tadman
Patricia Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johnson Matthey PLC
Original Assignee
Johnson Matthey PLC
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 by Johnson Matthey PLC filed Critical Johnson Matthey PLC
Priority to GB45171/66A priority Critical patent/GB1208565A/en
Priority to DE19671592898 priority patent/DE1592898A1/en
Priority to NL6713759A priority patent/NL6713759A/xx
Priority to FR123906A priority patent/FR1540212A/en
Publication of GB1208565A publication Critical patent/GB1208565A/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
    • C09K11/7767—Chalcogenides
    • C09K11/7769—Oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/20—Compounds containing only rare earth metals as the metal element
    • C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
    • C01F17/224—Oxides or hydroxides of lanthanides

Abstract

1,208,565. Luminescent materials. JOHNSON, MATTHEY & CO. Ltd. 9 Oct., 1967 [10 Oct., 1966], No. 45171/66. Heading C4S. A phosphor, the overall hue of the emission of which is non-red, comprises yttria and at least one activator selected from the stable lanthanide oxides of La, Ce, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. Phosphors, including those with overall red emissions, may comprise yttria activated with La: Ce; Dy: Ce; Ho: Ce; Tm: Ce; Sm: Pr; Eu: Pr; Dy: Pr; Sn: La; Tb: La; Dy: La; Tm: La; Yb: La; Tm: Nd; La: Yb; Tb: Yb; Dy: Yb; Ho: Yb; Tm: Yb; La: Gd; Sm: Tb; Gd: Tb; Dy; Tb; Ho: Tb; Er: Tb; Tm: Tb; Yb: Tb; Lu: Tb; Gd: Tm; Lu: Tm; Gd: Dy; Ho: Gd; Lu: Sm; Dy: Lu; Ho: Lu; Sm: Ho; and Eu: Er. A modification comprises yttria with oxides of Gd, Dy and also Sm in respective, atomic ratios of 1, 0À5, and 0À5%. The activators may be present in total amount 0À01, to 15 atomic per cent, e.g. 0.5 to 5 atomic per cent. The preparation may be by mixing yttria and the lanthanide oxide(s) in acid (e.g. HNO 3 and/or HCl), separating the lanthanides from the solution and converting to the oxides preferably by calcining (e.g. 1000‹ to 2000‹ C. for 2 hours) ; either the solution may be evaporated and the deposit calcined; or an excess of ammonium hydroxide added to the solution, the filtered precipitate washed with dilute ammonia, dried and calcined; or the solution concentrated by heating, then lanthanides precipitated by, for example, a complexing agent such as a salt of E.D.T.A. with adjustment of the pH value, dried and calcined, or the solution may be diluted with warm distilled water, warm oxalic, acid or ammonium oxalate added, -the precipitate dried and calcined. Emission wavelengths in the 4900 to 5650 Š range are instanced and also excitation by X-rays and cathode rays. Reference is made to persistence times up to 50 nanoseconds.
GB45171/66A 1966-10-10 1966-10-10 Improvements in and relating to phosphors Expired GB1208565A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB45171/66A GB1208565A (en) 1966-10-10 1966-10-10 Improvements in and relating to phosphors
DE19671592898 DE1592898A1 (en) 1966-10-10 1967-10-09 Improved Phosphors
NL6713759A NL6713759A (en) 1966-10-10 1967-10-10
FR123906A FR1540212A (en) 1966-10-10 1967-10-10 Process for manufacturing fluorescent substances and substances thus obtained

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB45171/66A GB1208565A (en) 1966-10-10 1966-10-10 Improvements in and relating to phosphors

Publications (1)

Publication Number Publication Date
GB1208565A true GB1208565A (en) 1970-10-14

Family

ID=10436174

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45171/66A Expired GB1208565A (en) 1966-10-10 1966-10-10 Improvements in and relating to phosphors

Country Status (3)

Country Link
DE (1) DE1592898A1 (en)
GB (1) GB1208565A (en)
NL (1) NL6713759A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006097A (en) * 1974-09-24 1977-02-01 Gte Sylvania Incorporated Yb activated hafnium oxide phosphor and methods of making
US4128411A (en) * 1976-01-20 1978-12-05 The United States Of America As Represented By The Secretary Of The Army Glass compositions having fluorescence properties
FR2422594A1 (en) * 1978-04-14 1979-11-09 Sjeldne Jordarter Forskning METHOD FOR MANUFACTURING YTTRIUM OXIDE HAVING PARTICULARLY LARGE PARTICLES
EP0077485A1 (en) * 1981-10-21 1983-04-27 Sibylle Prof. Dr. Kemmler-Sack Inorganic phosphor
US4421671A (en) * 1982-06-18 1983-12-20 General Electric Company Rare-earth-doped yttria-gadolinia ceramic scintillators
EP0455529A1 (en) * 1990-05-04 1991-11-06 Rhone-Poulenc Chimie Process for preparing dioxalates of rare earths and ammonium and their use for the preparation of rare earth oxides, dioxalates and the obtained oxides
US5213712A (en) * 1992-02-10 1993-05-25 General Electric Company Lanthanum lutetium oxide phosphor with cerium luminescence
US5545386A (en) * 1994-10-21 1996-08-13 Shin-Etsu Chemical Co., Ltd. Method for the preparation of globular particles of a rare earth oxide
EP2038372B1 (en) * 2007-07-05 2012-02-08 Cabot Corporation Compositions having multiple responses to excitation radiation and methods for making same

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006097A (en) * 1974-09-24 1977-02-01 Gte Sylvania Incorporated Yb activated hafnium oxide phosphor and methods of making
US4128411A (en) * 1976-01-20 1978-12-05 The United States Of America As Represented By The Secretary Of The Army Glass compositions having fluorescence properties
FR2422594A1 (en) * 1978-04-14 1979-11-09 Sjeldne Jordarter Forskning METHOD FOR MANUFACTURING YTTRIUM OXIDE HAVING PARTICULARLY LARGE PARTICLES
EP0077485A1 (en) * 1981-10-21 1983-04-27 Sibylle Prof. Dr. Kemmler-Sack Inorganic phosphor
US4421671A (en) * 1982-06-18 1983-12-20 General Electric Company Rare-earth-doped yttria-gadolinia ceramic scintillators
FR2661674A1 (en) * 1990-05-04 1991-11-08 Rhone Poulenc Chimie PROCESS FOR THE PRODUCTION OF RARE EARTH DUAL OXALATES AND AMMONIUM AND THEIR USES FOR THE MANUFACTURE OF RARE EARTH OXIDES, DOUBLE OXALATES AND OXIDES OBTAINED
EP0455529A1 (en) * 1990-05-04 1991-11-06 Rhone-Poulenc Chimie Process for preparing dioxalates of rare earths and ammonium and their use for the preparation of rare earth oxides, dioxalates and the obtained oxides
US5518703A (en) * 1990-05-04 1996-05-21 Rhone-Poulenc Chimie Production of finely divided rare earth ammonium oxalates/finely divided rare earth oxides
US5213712A (en) * 1992-02-10 1993-05-25 General Electric Company Lanthanum lutetium oxide phosphor with cerium luminescence
US5545386A (en) * 1994-10-21 1996-08-13 Shin-Etsu Chemical Co., Ltd. Method for the preparation of globular particles of a rare earth oxide
EP2038372B1 (en) * 2007-07-05 2012-02-08 Cabot Corporation Compositions having multiple responses to excitation radiation and methods for making same
US8257612B2 (en) 2007-07-05 2012-09-04 Cabot Corporation Compositions having multiple responses to excitation radiation and methods for making same
US8785866B2 (en) 2007-07-05 2014-07-22 Cabot Corporation Compositions having multiple responses to excitation radiation and methods for making same

Also Published As

Publication number Publication date
NL6713759A (en) 1968-04-11
DE1592898A1 (en) 1971-04-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]