A STUDY OF FERROELECTRIC MATERIALS. Final Technical Report, September 1, 1961 to August 31, 1962

Technical Report · Tue Sep 25 04:00:00 EDT 1962

OSTI ID:4712416

Taylor, W H

The high-temperature structures of NaNbO/sub 3/, radiation effects in ferroelectric materials, and neutron scattering with certain hydrogenous materials and materials showing dielectric anomalies are being studied. For the study of the structure at high temperatures methods were developed for obtaining x-ray single-crystal photographs up to 900 un. Concent 85% C. At 540 un. Concent 85% C a tetragonal perovskite-type structure was confirmed. The super lattice reflections associated with 2- and 4- subcell repeats were found at lower temperatures. A ferroelectric material, on irradiation by neutrons, gamma rays, or x rays, acts as a source of electrical energy. Two types of this radiation sensitivity were observed: one variable and of short time-constant, seen for periods of seconds or minutes after the start of irradiation; the other of long time-constant and stable for months after irradiation. Attempts to correlate radiation sensitivity and thickness of sample were unsuccessful. The neutron spectra of ferroelectric and paraelectric BaTiO/sub 3/, and of a number of hydrogen-bonded structures, were studied and partially interpreted. Evidence was obtained for the existence of a dielectric anomaly at about 20 un. Concent 85% K in TlCl and 50 un. Concent 85% K in TlBr. (auth)

• Research Organization: Cambridge Univ., England. Cavendish Lab.
• NSA Number: NSA-17-023862
• OSTI ID: 4712416
• Report Number(s): AD-286036
• Country of Publication: United States
• Language: English

Related Subjects

BARIUM OXIDES
BONDING
COMPOUNDS
DIELECTRICS
ELECTRICITY
FERROELECTRIC MATERIALS
FERROMAGNETIC MATERIALS
GAMMA RADIATION
HIGH TEMPERATURE
HYDROGEN
IRRADIATION
LATTICES
LOW TEMPERATURE
METALS, CERAMICS, AND OTHER MATERIALS
MONOCRYSTALS
NEUTRONS
RADIATION EFFECTS
REPORT
SCATTERING
SENSITIVITY
SODIUM OXIDES
SPECTRA
TELLURIUM BROMIDES
TELLURIUM CHLORIDES
TITANIUM OXIDES
X RADIATION