Temperature stability and fabrication of Pb(Zn 1/3 Nb 2/3 )O 3 –Pb(Zr,Ti)O 3 fibers with Pt core

In order to improve the electrical properties of metal-core piezoelectric ceramic fibers at high temperature, Pb(Zn 1/3 Nb 2/3 )O 3 –Pb(Zr,Ti)O 3 piezoelectric ceramics with high Curie temperature were selected. The Pb(Zn 1/3 Nb 2/3 ) O 3 –Pb(Zr,Ti)O 3 metal-core piezoelectric ceramic fibers were successfully fabricated by extrusion Pb(Zn 1/3 Nb 2/3 )O 3 –Pb(Zr,Ti)O 3 powder around a platinum wire. The microstructure and electrical properties of Pb(Zn 1/3 Nb 2/3 )O 3 –Pb(Zr,Ti)O 3 ceramics with different calcining and sintering temperatures were investigated. Compared with the previous metal-core piezoelectric ceramic fibers, the Pb(Zn 1/3 Nb 2/3 )O 3 –Pb(Zr,Ti)O 3 fibers showed lower piezoelectric and dielectric properties ([Formula: see text], k 31 = 0.253, and d 31 = −120 pC N −1 ). However, the Curie temperature of Pb(Zn 1/3 Nb 2/3 )O 3 –Pb(Zr,Ti)O 3 ceramics is about 295°C, much higher than that of 0.55Pb(Ni 1/3 Nb 2/3 )O 3 –0.45Pb(Zr 0.3 Ti 0.7 )O 3 ceramics (110°C). The Pb(Zn 1/3 Nb 2/3 )O 3 –Pb(Zr,Ti)O 3 fibers can be used at the highest temperature of 150°C, and the temperature stability of Pb(Zn 1/3 Nb 2/3 )O 3 –Pb(Zr,Ti)O 3 fibers is much better than that of 0.55Pb(Ni 1/3 Nb 2/3 )O 3 –0.45Pb(Zr 0.3 Ti 0.7 )O 3 fibers.