Temperature Stability of the Pb(Mn_(1/3)Sb_(2/3))_(0.05)Zr_(0.47)Ti_(0.48)O_3 Piezoelectric Ceramics

The Effects of ragid additive of MnO 2,soft additive of,Nb 2 O 5 and double additive of Cr 2 O 3 on the crystallographic phase and temperature stability of Pb(Mn 1/3 Sb 2/3) 0.05 Zr 0.47 Ti 0.48 O 3(PMSZT5) piezoelectric ceramic were studied.The results show that the pure perovskitic structure is obtained after calcined at 900℃.With these additives increasing,the amount of tetroganal phases decrease,and the morphotropic phase boundary(MPB) is correspondingly shift to the rhombohedral phase.Considering the effects of ion doping on the electric properties and temperature stability comprehensively,the PMSZT5 ceramic doped with MnO 2 has more excellent temperature stability than that doped with Nb 2 O 5 and Cr 2 O 3.A well-situated property of relative dielectric constant e 33 T /e 0(1560),piezoelectric constant d 33(350 pC/ N) and planar coupling factor K p(0.63) are obtained for the composition of PMSZT5+ 0.1wt% MnO 2.Accordingly,the average temperature coefficients of f r,K 31 and d 31,the PMSZT ceramics are 72×10-6 /℃,0.027%/℃,0.100%/℃ at the temperature range of 25℃ to 80℃.