GB491224A - Improvements in fluorescent materials for electric discharge tubes - Google Patents

Improvements in fluorescent materials for electric discharge tubes

Info

Publication number
GB491224A
GB491224A GB5895/37A GB589537A GB491224A GB 491224 A GB491224 A GB 491224A GB 5895/37 A GB5895/37 A GB 5895/37A GB 589537 A GB589537 A GB 589537A GB 491224 A GB491224 A GB 491224A
Authority
GB
United Kingdom
Prior art keywords
oxide
proportion
beryllium
manganese
per cent
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
GB5895/37A
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.)
FRANCO BRITISH ELECTRICAL CO
Original Assignee
FRANCO BRITISH ELECTRICAL CO
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 FRANCO BRITISH ELECTRICAL CO filed Critical FRANCO BRITISH ELECTRICAL CO
Priority to GB5895/37A priority Critical patent/GB491224A/en
Publication of GB491224A publication Critical patent/GB491224A/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
    • C09K11/0838—Aluminates; Silicates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

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

Abstract

491,224. Luminescent materials. FRANCO-BRITISH ELECTRICAL CO., Ltd., and BRACKENSEY, A. H. Feb. 26, 1937, No. 5895. [Class 98 (i)] Fluorescent material giving white light by the combination of the secondary light from the material with primary light from an electric low pressure mercury discharge tube comprises zinc and beryllium silicates, the former corresponding to the formula ZnO.SiO2, and manganese used as the activator. The proportion of Zn to Be reckoned as oxide may be about 3:1. In one example of preparation, zinc oxide, silica, and beryllium oxide are mixed dry and a 5 per cent solution of manganese nitrate added to form a paste which is dried at 150‹ C. and fired at 1100‹ C. The resulting powder is ground and refined, these steps being repeated if desired. Aluminium oxide may be added to the initial mixture in a proportion up to one-quarter of the quantity of beryllium. The proportion of manganese present may be up to 1À25 per cent of the total content of the mixture. Specification 480,356 is referred to.
GB5895/37A 1937-02-26 1937-02-26 Improvements in fluorescent materials for electric discharge tubes Expired GB491224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5895/37A GB491224A (en) 1937-02-26 1937-02-26 Improvements in fluorescent materials for electric discharge tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5895/37A GB491224A (en) 1937-02-26 1937-02-26 Improvements in fluorescent materials for electric discharge tubes

Publications (1)

Publication Number Publication Date
GB491224A true GB491224A (en) 1938-08-26

Family

ID=9804634

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5895/37A Expired GB491224A (en) 1937-02-26 1937-02-26 Improvements in fluorescent materials for electric discharge tubes

Country Status (1)

Country Link
GB (1) GB491224A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748517C (en) * 1940-02-11 1944-11-03 Luminous screen for Braun tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748517C (en) * 1940-02-11 1944-11-03 Luminous screen for Braun tubes

Similar Documents

Publication Publication Date Title
GB572771A (en) Improvements in the production of fluorescent materials
GB491224A (en) Improvements in fluorescent materials for electric discharge tubes
GB653576A (en) Luminescent material
GB678692A (en) Improvements in and relating to fluorescent coatings for electric lamps
GB492296A (en) Fluorescent material
GB646575A (en) Fluorescent material
GB1532465A (en) Phosphors
GB469776A (en) Improvements in or relating to combinations of electric discharge devices and materials excited to luminescence by the electric discharge
GB712301A (en) Improvements in or relating to luminescent materials
GB544763A (en) Improvements in and relating to fluorescent coating and methods of manufacture of such coatings
GB564946A (en) Improvements in or relating to fluorescent low pressure mercury vapour electric discharge lamps
GB652313A (en) Improvements relating to the production of luminescent materials
GB548818A (en) Improvements in and relating to luminescent materials
GB498370A (en) Fluorescent material
GB519964A (en) Improvements in luminescent materials
GB528552A (en) Improvements in luminescent materials and in electric discharge lamps comprising them
GB487520A (en) Improvements in combinations of gasfilled electric discharge devices and materials adapted to be excited to luminescence by them
GB579534A (en) Improvements relating to the manufacture of fluorescent material for fluorescent lamp
GB521796A (en) Improvements in and relating to luminescent materials for electric discharge lamps
GB746065A (en) Luminescent material, particularly for electric discharge lamps and method for its manufacture
GB514457A (en) Improvements in or relating to luminescent materials
GB538379A (en) Improvements in electric discharge lamps used with luminescent materials
GB560544A (en) Improvements in electric discharge lamps employing fluorescent material
AU106625B2 (en) Improvements inthe operation of gas filled electric discharge tubes with luminescent discharge, containing fluorescent materials
GB480356A (en) Improvements in or relating to electric discharge lamps comprising material adapted to be excited to luminescence by an electric discharge