Preparation of yttria gadolinia ceramic scintillators by sintering and gas hot isostatic pressing

Patent · Tue May 21 00:00:00 EDT 1985

OSTI ID:6481149

Greskovich, C D; Cusano, D A; DiBianca, F A

Sintering and gas hot isostatic pressing are used to prepare polycrystalline yttria-gadolinia ceramic scintillator bodies. Multi-component powder compacts, formed by cold pressing cold isostatic pressing, are sintered to the closed porosity stage. The density of the sintered compacts is then increased by gas hot isostatic pressing. The finished scintillator includes Y/sub 2/O/sub 3/, Gd/sub 2/O/sub 3/, and one or more of Eu/sub 2/O/sub 3/, Nd/sub 2/O/sub 3/, Yb/sub 2/O/sub 3/, Dy/sub 2/O/sub 3/, Pr/sub 2/O/sub 3/, and Tb/sub 2/O/sub 3/ rare earth activator oxides. The finished scintillator may also include at least one of SrO and CaO as afterglow reducers.

• Assignee: General Electric Company
• Patent Number(s): US 4518546
• OSTI ID: 6481149
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ADDITIVES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CERAMICS
CHALCOGENIDES
COLOR
CRYSTALS
DENSITY
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
FABRICATION
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
HOT PRESSING
MATERIALS WORKING
MEASURING INSTRUMENTS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
POWDERS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
PRESSING
RADIATION DETECTORS
RARE EARTH COMPOUNDS
SCINTILLATION COUNTERS
SINTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
YTTERBIUM COMPOUNDS
YTTERBIUM OXIDES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES