Investigation of Phase Structure and Electrical Properties of Doped PMN–PZT Ceramics Prepared by Different Methods

Abstract

The doped 0.25Pb(Mg1/3Nb2/3)O3–0.40PbTiO3–0.35PbZrO3 (PMN–PZT) ceramics with pure perovskite phase were prepared by one‐step oxide‐mixed method and conventional columbite method. The phase structure and electrical properties were systematically investigated. Crystallites of the ceramic fabricated by the oxide‐mixed method are partially oriented with the c‐axis, while samples prepared from columbite method are randomly oriented. This crystalline orientation enabled better electric properties, especially a higher piezoelectric coefficient d33 of 760 pC/N and electromechanical coupling factor kp of 69%. Materials fabricated from the oxide‐mixed method are attractive for high‐performance piezoelectric actuator and this simple method may have a great prospect in industrial production.

Effect of CuO Addition on the Microstructure and Electric Properties of Low‐Temperature Sintered 0.25PMN–0.40PT–0.35PZ Ceramics

“…This result implied that the formation of liquid phase promoted the sintering behavior and reduced the sintering temperature of the CuO-added specimens. 15 In our previous work, 10 the sintering temperature of 0.25PMN-0.40PT-0.35PZ was as high as 1260°C, which has been reduced by more than 300°C with the addition of CuO. The low-temperature sintering mechanism primarily originated from transition liquid phase sintering.…”

“…An attractive material for actuator and sensor applications, Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 –PbZrO 3 (PMN–PT–PZ) ceramics are known to have excellent piezoelectric properties . In particular, the 0.25PMN–0.40PT–0.35PZ composition has exhibited a superior piezoelectricity in our previous work, but its sintering temperature is as high as 1260°C. Several investigations have been conducted to decrease the sintering temperature of PMN–PT–PZ system.…”

“…In our previous work, it was found that Pb 0.92 Sr 0.06 Ba 0.02 (Mg 1/3 Nb 2/3 ) 0.25 Ti 0.40 Zr 0.35 O 3 (0.25PMN–0.40PT–0.35PZ) had a superior piezoelectricity. Thus, we chose this composition as the matrix material for low‐temperature sintering research.…”

“…In our previous work, 10 and ZrO 2 were weighed by mole ratio and mixed together by ball milling for 8 h. After drying, the mixture was calcined at 650°C for 1 h and 850°C for 2 h. Thereafter, CuO was added to the calcined powders and ball-milled for 48 h. A polyvinyl alcohol was added to the dried powders and then the powders were pressed into disks. The green pellets were burned out at 650°C for 1 h and then sintered at 950°C for 4 h. For the property measurement, samples were polished and coated with silver paint as electrodes.…”

Composition design of PMN-PH-PT piezoelectric ceramics for high-temperature actuator applications

“…Recently, relatively novel pseudo-ternary Pb(Mg 1/3 Nb 2/3 )O 3 -PbHfO 3 -PbTiO 3 (PMN-PH-PT) ceramics were reported, which could be prepared easily and exhibited comparable piezoelectricity (piezoelectric constant d 33 =680 pC N −1 ) with that of Pb(Mg 1/3 Nb 2/3 )O 3 -PbZrO 3 -PbTiO 3 (PMN-PZT, d 33 =698 pC N −1 , T C =200°C), but with rather high T C temperature, i.e., 276°C [13][14][15][16]. Such PMN-PH-PT ceramics present promising applications in high-temperature actuators, whereas the study on this system is inadequate.…”