Physics

Permittivity

Crystallization

Relaxation (psychology)

Crystallography

Conductivity

Dielectric

Physical chemistry

Psychology

Composite material

Chemistry

Materials science

Condensed matter physics

Annealing (glass)

Lead titanate

Amorphous solid

Quantum mechanics

Atmospheric temperature range

Optoelectronics

Electric field

Social psychology

Ferroelectricity

Dielectric loss

Thermodynamics

Ferroelectrics

The effect of thermal annealing on processes of dielectric relaxation and dielectric properties of amorphous and amorphous-crystalline lead titanate within the temperature range, including the crystallization temperature was studied. Two anomalies of losses in a temperature range ∼200-460C were found. The first one is probably related to making free of traps, and second one is due to presence of polar regions and their interaction with mobile charge carriers. The d.c. field effect on dielectric permittivity of amorphous sample mainly related to increasing of its conductivity under high electric field. The analysis of time dependences of dielectric permittivity shows two mechanisms of crystallization.

Dielectric Relaxation in Amorphous and Amorphous-Crystalline Lead Titanate