GB796654A - Improvements in or relating to luminescent materials - Google Patents

Improvements in or relating to luminescent materials

Info

Publication number
GB796654A
GB796654A GB1975055A GB1975055A GB796654A GB 796654 A GB796654 A GB 796654A GB 1975055 A GB1975055 A GB 1975055A GB 1975055 A GB1975055 A GB 1975055A GB 796654 A GB796654 A GB 796654A
Authority
GB
United Kingdom
Prior art keywords
product
sodium iodide
july
mould
iodine
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
GB1975055A
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.)
EK Cole Ltd
Original Assignee
EK Cole 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 EK Cole Ltd filed Critical EK Cole Ltd
Priority to GB1975055A priority Critical patent/GB796654A/en
Publication of GB796654A publication Critical patent/GB796654A/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
    • C09K11/62—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing gallium, indium or thallium
    • C09K11/626—Halogenides
    • C09K11/628—Halogenides with alkali or alkaline earth metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

796,654. Luminescent materials. COLE, Ltd., E. K., and EVANS, J. N. I. July 6, 1956 [July 8, 1955], No. 19750/55. Class 39(1). A method of producing thallium-activated sodium iodide crystals comprises dissolving iodine in a concentrated aqueous solution of sodium iodide, dissolving therein some thallous iodide, subjecting the solution to conditions which promote crystallization and removing the excess iodine. The final solution can be evaporated to promote crystallization or can be saturated at a temperature near its boiling point and cooled to a temperature near and above that at which crystals of hydrated sodium iodide would be deposited. The evaporation or cooling can take place in the vicinity of a seed crystal. To remove the excess iodine the product is heated at about 150‹C. until it becomes almost white. The product can be excited by gamma, beta and X-rays and has a peak emission at about 4100Š and a decay time of less than 1 microsecond. The product can be ground in the absence of moisture, after heating to 150‹C., to pass a 300 mesh sieve and then pressed in a mould of stainless steel in a lowpressure chamber. The mould can be previously heated to about 1000‹C.
GB1975055A 1955-07-08 1955-07-08 Improvements in or relating to luminescent materials Expired GB796654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1975055A GB796654A (en) 1955-07-08 1955-07-08 Improvements in or relating to luminescent materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1975055A GB796654A (en) 1955-07-08 1955-07-08 Improvements in or relating to luminescent materials

Publications (1)

Publication Number Publication Date
GB796654A true GB796654A (en) 1958-06-18

Family

ID=10134581

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1975055A Expired GB796654A (en) 1955-07-08 1955-07-08 Improvements in or relating to luminescent materials

Country Status (1)

Country Link
GB (1) GB796654A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4637898A (en) * 1981-02-26 1987-01-20 Eastman Kodak Company Fluorescent compositions, x-ray intensifying screens, and processes for making same
US4733090A (en) * 1981-02-26 1988-03-22 Eastman Kodak Company Screens for storing X-ray images and methods for their use
US4839090A (en) * 1971-09-13 1989-06-13 Harshaw/Filtrol Extrusion of macrocrystal scientillation phosphors

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4839090A (en) * 1971-09-13 1989-06-13 Harshaw/Filtrol Extrusion of macrocrystal scientillation phosphors
US4637898A (en) * 1981-02-26 1987-01-20 Eastman Kodak Company Fluorescent compositions, x-ray intensifying screens, and processes for making same
US4733090A (en) * 1981-02-26 1988-03-22 Eastman Kodak Company Screens for storing X-ray images and methods for their use

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