| abstract |
The invention provides a lead-free CKCBT piezoelectric ceramic and its formula and preparation method, and relates to the field of piezoelectric ceramics. The formula stoichiometric general formula of the lead-free CKCBT piezoelectric ceramic is: Ca 1-2x (KCe) x Bi 4 Ti 4 O 15 +ywt%Bi 2 O 3 +zwt%M, wherein, x=0.0-0.15, y =0‑1.5, z=0‑4, M includes at least one of Nb 2 O 5 , MnO 2 , V 2 O 5 or WO 3 ; effectively improving its Curie temperature and relative piezoelectric performance. The preparation method is simple and stable in operation and high in yield, and is suitable for industrial popularization and application. The lead-free CKCBT piezoelectric ceramics prepared by the above formula through the above preparation method has good high temperature resistance, can work under high temperature conditions for a long time, and the piezoelectric activity is not easily degraded, and is suitable for preparing high temperature and high frequency piezoelectric devices. |