GB1348102A - Extrusion of macrocrystal scintillation phosphors - Google Patents

Extrusion of macrocrystal scintillation phosphors

Info

Publication number
GB1348102A
GB1348102A GB1992872A GB1992872A GB1348102A GB 1348102 A GB1348102 A GB 1348102A GB 1992872 A GB1992872 A GB 1992872A GB 1992872 A GB1992872 A GB 1992872A GB 1348102 A GB1348102 A GB 1348102A
Authority
GB
United Kingdom
Prior art keywords
extrusion
temperature
caf
psi
april
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
GB1992872A
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.)
Kewanee Oil Co
Original Assignee
Kewanee Oil 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 Kewanee Oil Co filed Critical Kewanee Oil Co
Publication of GB1348102A publication Critical patent/GB1348102A/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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/20—Measuring radiation intensity with scintillation detectors
    • G01T1/202—Measuring radiation intensity with scintillation detectors the detector being a crystal

Abstract

1348102 Luminescent materials and uses thereof KEWANEE OIL CO 28 April 1972 [30 April 1971 13 Sept 1971] 19928/72 Heading C4S A polycrystalline scintillator of doped alkali alkaline earth metal halide or thallous chloride is formed by extruding under pressure a macrocrystal at a temperature lower than the melting point but greater than either 200‹ C. or half the melting point temperature. The temperature is preferably 100‹ C. below the m.p.: extrusion at lower temperatures results in inferior scintillators. Materials include NaI : Tl, CsI : Tl or Na, KI : Tl, LiC : Eu, CaF 2 : Eu and TlCl 2 (Iodides). Melt grown multiple crystal ingots or monocrystals are extruded; pressure being applied by a plunger, orifice or a screw feed. Pressures are 800-4000 psi for alkali metal halides and 13-45,000 psi for CaF 2 . The extrusion cross-section is cylindrical, rectangular, triangular, semicircular or annular. The extrusion is cut and polished or pressed at elevated temperature to form camera plates, windows, domes and lenses for use in geophysical surveys, clinical measurements, radiation monitoring and spacecraft.
GB1992872A 1971-09-13 1972-04-28 Extrusion of macrocrystal scintillation phosphors Expired GB1348102A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18008771A 1971-09-13 1971-09-13
US13921771A 1971-09-13 1971-09-13

Publications (1)

Publication Number Publication Date
GB1348102A true GB1348102A (en) 1974-03-13

Family

ID=26836989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1992872A Expired GB1348102A (en) 1971-09-13 1972-04-28 Extrusion of macrocrystal scintillation phosphors

Country Status (2)

Country Link
FR (1) FR2134651B1 (en)
GB (1) GB1348102A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9507032B1 (en) * 2007-11-16 2016-11-29 Lawrence Livermore National Security, Llc Barium iodide and strontium iodide crystals and scintillators implementing the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4839090A (en) * 1971-09-13 1989-06-13 Harshaw/Filtrol Extrusion of macrocrystal scientillation phosphors
US4242221A (en) * 1977-11-21 1980-12-30 General Electric Company Ceramic-like scintillators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9507032B1 (en) * 2007-11-16 2016-11-29 Lawrence Livermore National Security, Llc Barium iodide and strontium iodide crystals and scintillators implementing the same

Also Published As

Publication number Publication date
FR2134651B1 (en) 1976-10-29
FR2134651A1 (en) 1972-12-08

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees