GB672172A - Improvements in or relating to luminescent materials - Google Patents

Improvements in or relating to luminescent materials

Info

Publication number
GB672172A
GB672172A GB19417/50A GB1941750A GB672172A GB 672172 A GB672172 A GB 672172A GB 19417/50 A GB19417/50 A GB 19417/50A GB 1941750 A GB1941750 A GB 1941750A GB 672172 A GB672172 A GB 672172A
Authority
GB
United Kingdom
Prior art keywords
gms
mgo
magnesium
fired
oxygen
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
GB19417/50A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB672172A publication Critical patent/GB672172A/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

Landscapes

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

Abstract

672,172. Luminescent materials. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 3, 1950 [April 6, 1950], No. 19417/50. Class 39 (i). A red luminescent material excitable by cathode or ultra-violet rays comprises a fired reaction product containing magnesium, arsenic, and oxygen activated by manganese in which the gram molecule ratio between MgO and As 2 O 5 exceeds 3: 1. Several manufacturing methods are described utilizing in common 365 gms. MgO, 230 gms. As 2 O 5 and 2.3 gms. MnCO 3 ground in a ball mill with distilled water; evaporated to dryness; fired at 600 C. for one hour in air or oxygen, and then for a further period at 1100‹ C. Magnesium fluoride may be used as a flux. The light emitted is substantially the same colour as that from known magnesium germanates with a higher conversion efficiency, when excited by ultraviolet (e.g. mercury lines 2537 Š and 3650 Š). The material may be used in low-pressure mercury vapour discharge tubes, colour television, shop window display and theatre decors.
GB19417/50A 1950-04-06 1950-08-03 Improvements in or relating to luminescent materials Expired GB672172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL672172X 1950-04-06

Publications (1)

Publication Number Publication Date
GB672172A true GB672172A (en) 1952-05-14

Family

ID=19802161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19417/50A Expired GB672172A (en) 1950-04-06 1950-08-03 Improvements in or relating to luminescent materials

Country Status (1)

Country Link
GB (1) GB672172A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714095A (en) * 1953-02-03 1955-07-26 Tokyo Shibaura Electric Co Magnesium boroarsenate phosphor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714095A (en) * 1953-02-03 1955-07-26 Tokyo Shibaura Electric Co Magnesium boroarsenate phosphor

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