Fabrication and Piezoelectric Property of Textured Bismuth Layered Structure Ceramics by Hot Pressing Technique

摘要

The bismuth layered structure materials (BLSFs) with general formula of the (Bi_2O_2)~(2+)(A_(m-1)BmO_(3m+1))~(-2), have attracted considerable attention for high-temperature piezoelectric applications. Hot pressing is a useful densifying and texture technique for enhancing the piezoelectric properties. In this present study, four different types (m=l, 2, 3, 4) of ceramics with Aurivillius structure were prepared and the influential factors of textured degree was investigated systematically by hot pressing method. The result indicates that the value of m is larger, the BLSFs ceramics is easier to get high degree of texture and high piezoelectric properties in the parallel of the hot pressing direction.