Photosensitivity enhancement of PLZT ceramics by positive-ion implantation

Patent · Thu Jan 28 00:00:00 EST 1982

OSTI ID:6737826

Peercy, P. S.; Land, C. E.

The photosensitivity of lead lanthanum zirconate titanate (PLZT) ceramic material used in high resolution, high contrast, and nonvolatile photoferroelectric image storage and display devices is enhanced significantly by positive ion implantation of the PLZT near its surface. Implanted ions include H/sup +/, He/sup +/, Ne/sup +/, Ar/sup +/, as well as chemically reactive ions from Fe, Cr, and Al. The positive ion implantation advantageously serves to shift the absorption characteristics of the PLZT material from near-uv light to visible light. As a result, photosensitivity enhancement is such that the positive ion implanted PLZT plate is sensitive even to sunlight and conventional room lighting, such as fluorescent and incandescent light sources. The method disclosed includes exposing the PLZT plate to the positive ions at sufficient density, from 1 x 10/sup 12/ to 1 x 10/sup 17/, and with sufficient energy, from 100 to 500 keV, to provide photosensitivity enhancement. The PLZT material may have a lanthanum content ranging from 5 to 10%, a lead zirconate content of 62 to 70 mole %, and a lead titanate content of 38 to 30%. The ions are implanted at a depth of 0.1 to 2 microns below the surface of the PLZT plate.

• DOE Contract Number: AC04-76DP00789
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A343612
• Application Number: ON: DE83002379
• OSTI ID: 6737826
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
36 MATERIALS SCIENCE
CERAMICS
ION IMPLANTATION
LANTHANUM COMPOUNDS
LEAD COMPOUNDS
MEMORY DEVICES
TITANATES
ZIRCONATES
ALUMINIUM IONS
ANTIFERROELECTRIC MATERIALS
ARGON IONS
CHROMIUM IONS
HELIUM IONS
HYDROGEN IONS
IRON IONS
NEON IONS
PHOTOSENSITIVITY
POLARIZATION
CHARGED PARTICLES
DIELECTRIC MATERIALS
IONS
MATERIALS
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SENSITIVITY
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
420200* - Engineering- Facilities
Equipment
& Techniques
360204 - Ceramics
Cermets
& Refractories- Physical Properties