GB745572A - Improvements relating to the manufacture of fluorescent materials - Google Patents

Improvements relating to the manufacture of fluorescent materials

Info

Publication number
GB745572A
GB745572A GB2316253A GB2316253A GB745572A GB 745572 A GB745572 A GB 745572A GB 2316253 A GB2316253 A GB 2316253A GB 2316253 A GB2316253 A GB 2316253A GB 745572 A GB745572 A GB 745572A
Authority
GB
United Kingdom
Prior art keywords
magnesium
compound
oxide
firing
aug
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
GB2316253A
Inventor
Geoffrey Sergeant
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.)
Siemens Electric Lamps and Supplies Ltd
Original Assignee
Siemens Electric Lamps and Supplies 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 Siemens Electric Lamps and Supplies Ltd filed Critical Siemens Electric Lamps and Supplies Ltd
Priority to GB2316253A priority Critical patent/GB745572A/en
Publication of GB745572A publication Critical patent/GB745572A/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

745,572. Luminescent materials. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd. Aug. 20, 1954 [Aug. 21, 1953], No. 23162/53. Class 39 (1). Method of preparing activated magnesium arsenate comprises mixing, ball-milling dry and firing in oxygen at 1100-1150‹ C. for 2 hours a compound of arsenic other than the oxide, e.g. ammonium arsenate, a compound of magnesium that will break down to the oxide when heated, e.g. magnesium carbonate, a compound of an activating metal, e.g. manganese carbonate, and a fluorine containing flux, e.g. ammonium fluoride, and then adding a chlorine containing flux, e.g. ammonium chloride, and again ball-milling dry and firing in oxygen at 1050‹ C. for 3 hours. The ratio of magnesium oxide to arsenic pentoxide in the material may vary between 3: 1 and 10: 1, preferably between 7.5: 1 and 10: 1 and is preferably 8:1.
GB2316253A 1953-08-21 1953-08-21 Improvements relating to the manufacture of fluorescent materials Expired GB745572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2316253A GB745572A (en) 1953-08-21 1953-08-21 Improvements relating to the manufacture of fluorescent materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2316253A GB745572A (en) 1953-08-21 1953-08-21 Improvements relating to the manufacture of fluorescent materials

Publications (1)

Publication Number Publication Date
GB745572A true GB745572A (en) 1956-02-29

Family

ID=10191162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2316253A Expired GB745572A (en) 1953-08-21 1953-08-21 Improvements relating to the manufacture of fluorescent materials

Country Status (1)

Country Link
GB (1) GB745572A (en)

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