JPS55157678A - Preparation of fluorescent substance - Google Patents

Preparation of fluorescent substance

Info

Publication number
JPS55157678A
JPS55157678A JP6502879A JP6502879A JPS55157678A JP S55157678 A JPS55157678 A JP S55157678A JP 6502879 A JP6502879 A JP 6502879A JP 6502879 A JP6502879 A JP 6502879A JP S55157678 A JPS55157678 A JP S55157678A
Authority
JP
Japan
Prior art keywords
fluorescent substance
alkali metal
oxides
mixture
phosphates
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.)
Granted
Application number
JP6502879A
Other languages
Japanese (ja)
Other versions
JPS5727147B2 (en
Inventor
Hiromichi Yamada
Atsushi Suzuki
Akira Yamamoto
Takeshi Kano
Masaki Nakano
Osamu Kanehisa
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6502879A priority Critical patent/JPS55157678A/en
Publication of JPS55157678A publication Critical patent/JPS55157678A/en
Publication of JPS5727147B2 publication Critical patent/JPS5727147B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Luminescent Compositions (AREA)

Abstract

PURPOSE: To obtain a fluorescent substance having a high efficiency and brightness, by replacing yttrium and terbium oxides party with phosphates thereof, and by incorporating specific amounts of sulfur and an alkali metal salt of flux with the mixture.
CONSTITUTION: 3W30 atomic percent of the total number of atoms of Ln and M are replaced by at least one compound of phosphates of Ln and M. The mixture of Ln and M oxides (or compounds capable of forming oxides by heating), the phosphate and a compound capable of forming an alkali metal sulfide is then in corporated with 0.7W2.2mol of an alkali metal salt and 2.2W7mol of sulfur based on one mole of the formed fluorescent substance. The resulting mixture is preferably calcined at 1,000W1,250°C to give the objective substance of formula (Ln is yttrium, gadolinium or lanthanum; M is terbium or praseodymiun; 0.00003≤x≤0.2).
COPYRIGHT: (C)1980,JPO&Japio
JP6502879A 1979-05-28 1979-05-28 Preparation of fluorescent substance Granted JPS55157678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6502879A JPS55157678A (en) 1979-05-28 1979-05-28 Preparation of fluorescent substance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6502879A JPS55157678A (en) 1979-05-28 1979-05-28 Preparation of fluorescent substance

Publications (2)

Publication Number Publication Date
JPS55157678A true JPS55157678A (en) 1980-12-08
JPS5727147B2 JPS5727147B2 (en) 1982-06-09

Family

ID=13275101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6502879A Granted JPS55157678A (en) 1979-05-28 1979-05-28 Preparation of fluorescent substance

Country Status (1)

Country Link
JP (1) JPS55157678A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013124A1 (en) * 1990-03-01 1991-09-05 Kasei Optonix, Ltd. Process for producing rare earth oxysulfide phosphor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013124A1 (en) * 1990-03-01 1991-09-05 Kasei Optonix, Ltd. Process for producing rare earth oxysulfide phosphor

Also Published As

Publication number Publication date
JPS5727147B2 (en) 1982-06-09

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