GB492722A - Improvements in luminescent materials - Google Patents

Improvements in luminescent materials

Info

Publication number
GB492722A
GB492722A GB873137A GB873137A GB492722A GB 492722 A GB492722 A GB 492722A GB 873137 A GB873137 A GB 873137A GB 873137 A GB873137 A GB 873137A GB 492722 A GB492722 A GB 492722A
Authority
GB
United Kingdom
Prior art keywords
activator
lead
matrix
salt
group iii
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
GB873137A
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to GB873137A priority Critical patent/GB492722A/en
Publication of GB492722A publication Critical patent/GB492722A/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
    • C09K11/0827—Halogenides
    • C09K11/0833—Halogenides with alkali or alkaline earth metals

Abstract

492,722. Luminescent materials. GENERAL ELECTRIC CO., Ltd. (Patent- Treuhand-Ges. f³r Elektrische Gl³hlampen) March 24, 1937, No. 8731. [Class 98 (i)] An artificial luminescent material comprises a matrix of the halide of an alkaline or alkaline earth metal and an activator of copper, silver, cerium, thallium, tin or lead present in a molecular proportion of not less than 1 per cent. Manganese may also be present as a part activator. Numerous examples of the chlorides, bromides and iodides of Li, Na, K, Rb, Cs, Ca, Sr, Ba and Mg, singles or in combination, and tables of the luminescent properties are included in the Specification. The materials are prepared by melting together the matrix and a salt of the actuating metal, preferably a halide. If the salt of the activator is volatile, e.g. lead or thallium, the matrix and the salt of the activator are dissolved in the same solvent. Examples of the preparation of magnesium bromide activated by tin, calcium iodide activated by lead, and calcium iodide activated by lead and manganese are given in the Specification. Specification 410,347, [Group III], is referred to. Reference has been directed by the Comptroller to Specifications 350,732, [Group III], 391,100, 391,914 ; and 477,037, [Group III], (as open to inspection under Sect. 91 of the Acts).
GB873137A 1937-03-24 1937-03-24 Improvements in luminescent materials Expired GB492722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB873137A GB492722A (en) 1937-03-24 1937-03-24 Improvements in luminescent materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB873137A GB492722A (en) 1937-03-24 1937-03-24 Improvements in luminescent materials

Publications (1)

Publication Number Publication Date
GB492722A true GB492722A (en) 1938-09-26

Family

ID=9858172

Family Applications (1)

Application Number Title Priority Date Filing Date
GB873137A Expired GB492722A (en) 1937-03-24 1937-03-24 Improvements in luminescent materials

Country Status (1)

Country Link
GB (1) GB492722A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747208C (en) * 1939-02-08 1944-09-15 Telefunken Gmbh Process for increasing the brightness of silver-activated luminophores
US2417038A (en) * 1944-10-25 1947-03-04 Sylvania Electric Prod Fluorescent material
US2451292A (en) * 1943-12-20 1948-10-12 Rca Corp Dark trace screen
US2524839A (en) * 1948-05-27 1950-10-10 James H Schulman X-ray sensitive screen
US2585551A (en) * 1948-05-01 1952-02-12 Hofstadter Robert Means for detecting ionizing radiations
US2676111A (en) * 1951-08-18 1954-04-20 Cons Mining & Smelting Co Phosphor composition containing indium and method of producing same
US2727863A (en) * 1950-11-30 1955-12-20 Gen Electric Method of preparation of thallium activated potassium iodide
US3030313A (en) * 1958-06-19 1962-04-17 Du Pont Process for making thallium activated potassium iodide phosphor
DE1139596B (en) * 1960-05-05 1962-11-15 Merck Ag E Process for the production of a phosphor based on an alkali iodide activated with thallium as well as X-ray amplifier film containing this phosphor
US4055457A (en) * 1974-01-17 1977-10-25 The Harshaw Chemical Company Method for growing absorption-free alkali metal halide single crystals
US4297584A (en) * 1977-04-11 1981-10-27 Lockheed Missiles & Space Company, Inc. Rare earth phosphors and phosphor screens
US4780376A (en) * 1985-04-12 1988-10-25 Fuji Photo Film Co., Ltd. Phosphor and radiation image storage panel

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747208C (en) * 1939-02-08 1944-09-15 Telefunken Gmbh Process for increasing the brightness of silver-activated luminophores
US2451292A (en) * 1943-12-20 1948-10-12 Rca Corp Dark trace screen
US2417038A (en) * 1944-10-25 1947-03-04 Sylvania Electric Prod Fluorescent material
US2585551A (en) * 1948-05-01 1952-02-12 Hofstadter Robert Means for detecting ionizing radiations
US2524839A (en) * 1948-05-27 1950-10-10 James H Schulman X-ray sensitive screen
US2727863A (en) * 1950-11-30 1955-12-20 Gen Electric Method of preparation of thallium activated potassium iodide
US2676111A (en) * 1951-08-18 1954-04-20 Cons Mining & Smelting Co Phosphor composition containing indium and method of producing same
US3030313A (en) * 1958-06-19 1962-04-17 Du Pont Process for making thallium activated potassium iodide phosphor
DE1139596B (en) * 1960-05-05 1962-11-15 Merck Ag E Process for the production of a phosphor based on an alkali iodide activated with thallium as well as X-ray amplifier film containing this phosphor
US4055457A (en) * 1974-01-17 1977-10-25 The Harshaw Chemical Company Method for growing absorption-free alkali metal halide single crystals
US4297584A (en) * 1977-04-11 1981-10-27 Lockheed Missiles & Space Company, Inc. Rare earth phosphors and phosphor screens
US4780376A (en) * 1985-04-12 1988-10-25 Fuji Photo Film Co., Ltd. Phosphor and radiation image storage panel

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