Unactivated yttrium tantalate phosphor

Patent · Tue May 12 04:00:00 EDT 1992

OSTI ID:5101579

Reddy, V B; Cheung, H K

This patent describes an unactivated yttrium tantalate phosphor having M prime monoclinic structure and containing one or more additives of Rb and Al in an amount of between about 0.001 to 0.1 moles per mole of yttrium tantalate to improve brightness under X-radiation. This patent also describes an unactivated yttrium tantalate phosphor having M prime monoclinic structure and containing additives of Sr in an amount of between 0.001 to 0.1 moles per mole of yttrium tantalate and one or more of Rb and Al in an amount of between 0.001 to 0.1 moles per mole of yttrium tantalate the phosphor exhibiting a greater brightness under X-radiation than the phosphor absent Rb and Al.

• Assignee: GTE Products Corp., Stamford, CT (United States)
• Patent Number(s): A; US 5112524
• Application Number: PPN: US 7-732886
• OSTI ID: 5101579
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360206 -- Ceramics
Cermets
& Refractories-- Radiation Effects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
ADDITIVES
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CHEMICAL RADIATION EFFECTS
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
OXYGEN COMPOUNDS
PHOSPHORS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIATIONS
REFRACTORY METAL COMPOUNDS
RUBIDIUM ADDITIONS
RUBIDIUM ALLOYS
TANTALATES
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
X RADIATION
YTTRIUM COMPOUNDS