抄録
The variation of the Weibull modulus (m) of dielectric strength (Eb) with temperature showed that Eb scatters more widely in the ferroelectric phase than in the paraelectric phase or around the Curie point (Tc). This result was correlated to the fact that the variation of Eb was approximately inverse to that of dielectric constant. It was also found that the modules m varied with sintering conditions; a higher value of m (ca. 10-15) was obtained in a specimen sintered at a lower temperature for a shorter time. This result is probably correlated with the distribution of larger grains.
