STRENGTH DISTRIBUTION OF TITANIA CERAMICS AFTER HIGH-VOLTAGE SCREENING

Screening fields, at or below which 10%, 30% and 50% of TiO2 ceramic s amples would break electrically, were applied to samples which show si ngle-mode strength distribution. After these high-voltage screenings, the surviving samples were subjected to mechanical strength measuremen t and the resultant strength distributions were compared with the orig inal distributions. This high-voltage screening was also applied to mo del ceramics samples composed of titania with two different relative d ensities. The effect of high-voltage screening and the correlation bet ween mechanical and dielectric strengths are discussed.