GB578192A - Improvements in luminescent materials - Google Patents

Improvements in luminescent materials

Info

Publication number
GB578192A
GB578192A GB830842A GB830842A GB578192A GB 578192 A GB578192 A GB 578192A GB 830842 A GB830842 A GB 830842A GB 830842 A GB830842 A GB 830842A GB 578192 A GB578192 A GB 578192A
Authority
GB
United Kingdom
Prior art keywords
phosphate
calcium
per cent
manganese
ground
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
GB830842A
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.)
ALFRED MCKEAG
General Electric Co PLC
Original Assignee
ALFRED MCKEAG
General Electric Co 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 ALFRED MCKEAG, General Electric Co PLC filed Critical ALFRED MCKEAG
Priority to GB830842A priority Critical patent/GB578192A/en
Publication of GB578192A publication Critical patent/GB578192A/en
Priority to MY5300062A priority patent/MY5300062A/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
    • C09K11/74—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth
    • C09K11/75—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony
    • C09K11/76—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony also containing phosphorus and halogen, e.g. halophosphates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Abstract

578,192. Luminescent materials. GENERAL ELECTRIC CO., Ltd., McKEAG, A. H., and RANBY, P. W. June 17,1942, Nos. 8308, 11918 and 17405. [Class 39 (i)] Luminescent material for use in fluorescent lamps, cathode-ray tubes and X-ray screens consists of a halo-phosphate, i.e. calcium and/or strontium phosphate with a calcium and/or strontium halide (other than iodide) activated by antimony, preferably between 2 and 6 per cent. Manganese may also be added up to 10 per cent. A table is given of the colour of luminescent light obtained with 3 per cent Sb and varying amounts of Mn 0-5 per cent with various matrices when energized by radiation at 2537 Š. Preferred methods of preparing are set forth : calcium or strontium phosphate are obtained from the carbonate and phosphoric acid; manganese phosphate from ammonium hydrogen phosphate and manganese chloride ; calcium fluoride from the chloride and ammonium fluoride. Proportions of materials for various mixes are set out, the antimony being usually added as trioxide. The mixtures are, for example, ground, heated, ground, heated, ground again, washed with distilled water and dried at 160‹ C. ; the heating temperature is between 1000-1150‹ C. Specifications 495,706, [Group XX], and 516,870 are referred to. According to the Provisional Specifications, barium and iodine may be used.
GB830842A 1942-06-17 1942-06-17 Improvements in luminescent materials Expired GB578192A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB830842A GB578192A (en) 1942-06-17 1942-06-17 Improvements in luminescent materials
MY5300062A MY5300062A (en) 1942-06-17 1953-12-30 Improvements in luminescent materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB830842A GB578192A (en) 1942-06-17 1942-06-17 Improvements in luminescent materials

Publications (1)

Publication Number Publication Date
GB578192A true GB578192A (en) 1946-06-19

Family

ID=9850033

Family Applications (1)

Application Number Title Priority Date Filing Date
GB830842A Expired GB578192A (en) 1942-06-17 1942-06-17 Improvements in luminescent materials

Country Status (2)

Country Link
GB (1) GB578192A (en)
MY (1) MY5300062A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544663A (en) * 1949-09-13 1951-03-13 Sylvania Electric Prod Method of making a calcium halophosphate phosphor
US2579900A (en) * 1948-05-07 1951-12-25 Sylvania Electric Prod Improved calcium halo-phosphate phosphor
US2664401A (en) * 1949-04-01 1953-12-29 Gen Electric Alkaline earth phosphate phosphors of the apatite type
DE1040157B (en) * 1955-02-24 1958-10-02 Acec Fluorescent material for fluorescent lamps
DE1055724B (en) * 1953-07-06 1959-04-23 Gen Electric Apatite-like fluorophosphate phosphor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579900A (en) * 1948-05-07 1951-12-25 Sylvania Electric Prod Improved calcium halo-phosphate phosphor
US2664401A (en) * 1949-04-01 1953-12-29 Gen Electric Alkaline earth phosphate phosphors of the apatite type
US2544663A (en) * 1949-09-13 1951-03-13 Sylvania Electric Prod Method of making a calcium halophosphate phosphor
DE1055724B (en) * 1953-07-06 1959-04-23 Gen Electric Apatite-like fluorophosphate phosphor
DE1040157B (en) * 1955-02-24 1958-10-02 Acec Fluorescent material for fluorescent lamps

Also Published As

Publication number Publication date
MY5300062A (en) 1953-12-31

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