Ferroelectric Materials for Applications in Sensor Protection.
Abstract
The focus of this program has been upon producing and characterizing new functional materials whose properties can be fine tuned to provide eye sensor protection against laser threats and to suit a range of optoelectronic device applications. Material systems that maximize orientational anisotropy (for use in scattering mode systems) and systems that minimize orientational anisotropy (for use in high field modulators and field induced photorefractive applications) were both approached. Relaxor ferroelectric tungsten bronze single crystals (Sr,Ba)Nb2O6 and (Pb,Ba)Nb2O6 solid solution families and relaxor ferroelectric perovskite (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PI) families, were studied extensively. The unique capabilities of a laser heated pedestal growth (LHPG) system were utilized for growth of new materials in single crystal fiber form that produces crystals of long interaction length for optical wave in the crystal and high crystal perfection with maximized properties along chosen directions. Hc uniaxial pressing hot forging, or appropriate solid state reaction processing methods were used to produce transparent polycrystalline ceramics to provide low scattering high anisotropy ceramics or high scattering high anisotropy ceramics. This final report summarizes significant results produced from this program through combination of experimental and crystal chemistry approaches in this field, delineates conclusions drawn from the research, and provides recommendations for future research.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 08, 1995
- Accession Number
- ADA298484
Entities
People
- Amar S. Bhalla
- Leslie Eric Cross
Organizations
- Pennsylvania State University