GB530021A - Improvements in and relating to fluorescent materials - Google Patents

Improvements in and relating to fluorescent materials

Info

Publication number
GB530021A
GB530021A GB17409/39A GB1740939A GB530021A GB 530021 A GB530021 A GB 530021A GB 17409/39 A GB17409/39 A GB 17409/39A GB 1740939 A GB1740939 A GB 1740939A GB 530021 A GB530021 A GB 530021A
Authority
GB
United Kingdom
Prior art keywords
samarium
oxide
fluorescent materials
june
relating
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
GB17409/39A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB530021A publication Critical patent/GB530021A/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
    • C09K11/7708—Vanadates; Chromates; Molybdates; Tungstates

Abstract

530,021. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. June 14, 1939, No. 17409. Convention date, June 17, 1938. [Class 39 (i)] Fluorescent materials, for use in lamps such as those described in Specification 457,486 or other purposes, are composed of an oxygen compound of calcium with molybdenum and tungsten, activated by samarium and lead. As an example 20 parts of calcium oxide and 79 parts of tungstic oxide are mixed with about 0.5 per cent of samarium as oxide and 1.0 per cent of lead as acetate and the whole fired in air for about four hours at 1000‹C. The samarium may be replaced by lanthanum or erbium.
GB17409/39A 1938-06-17 1939-06-14 Improvements in and relating to fluorescent materials Expired GB530021A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US530021XA 1938-06-17 1938-06-17

Publications (1)

Publication Number Publication Date
GB530021A true GB530021A (en) 1940-12-03

Family

ID=21981285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17409/39A Expired GB530021A (en) 1938-06-17 1939-06-14 Improvements in and relating to fluorescent materials

Country Status (1)

Country Link
GB (1) GB530021A (en)

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