Abstract
Grain growth of PLZT was investigated as a function of the hot-pressing parameters of temperature, time and pressure. The selected conditions are; temperature range from 1100 to 1250°C, time range from 120 to1440 minutes and pressure range from 0 to 350kg/cm2.
The results indicated that the grain growth depends upon the temperature and time, but does not on the pressure. Grain growth for 8/65/35(La/Zr/Ti) PLZT was expressed as follows; D3=34×10texp(-ΔH/RT), where D is the average grain size in μm unit, t the time in min. T the absolute temperature and ΔH an activation energy. The activation energy of 78 kcal/mol was calculated.
