Enhanced mechanical quality factor of BiScO₃–PbTiO₃piezoelectric ceramics using glass composition

Abstract

The mechanical quality factor Qm of BS–PT ceramics increased to 90 and the thermal depolarization temperature Td remained above 300 °C after GeO2 doping.

Electromechanical Performance Optimization of Ni-Doped Bi(Sc, Zr)O3–PbTiO3 Ceramics and Microstructure Analysis

“…Many efforts including the acceptor or donor doping, construction of ternary solid solutions, and preparation process optimization, have been made to decrease the tan δ or increase the Q m of BS-PT-based ceramics at the MPB, 16−22 such as the introduction of Fe 3+ , 16 Mn 2+/3+ , 19 Nb 5+ , 19 Pb(Mn 1/3 Sb 2/3 )O 3 , 20 Bi(Mn 1/2 Zr 1/2 )O 3 , 21 Bi-(Mn 2/3 Sb 1/3 )O 3 , 22 and GeO 2 . 18 Nb 5+ donor doping in BS-PT not only improves the piezoelectric response but also suppresses the high temperature tan δ due to the decreased oxygen vacancy concentration, 19 leading to a high d 33 ∼ 553 pC/N, T C ∼ 445 °C, and low tan δ < 2% in the temperature range of 150−300 °C. Donor substitution of La 3+ in BiYbO 3 −Pb(Zr,Ti)O 3 ceramic system also plays an important role in enhancing the electrical properties by decreasing the oxygen vacancies in the lattice.…”

“…Compared with PZT, BS-PT owns higher Curie temperature and competitive piezoelectric performance, which can be an excellent option for high-temperature piezoelectric devices. − However, the high dielectric loss (tan δ > 3%) and low mechanical quality factor ( Q m < 30) are the major obstacles for the high-power and high-frequency applications of BS-PT-based ceramics. Many efforts including the acceptor or donor doping, construction of ternary solid solutions, and preparation process optimization, have been made to decrease the tan δ or increase the Q m of BS-PT-based ceramics at the MPB, − such as the introduction of Fe 3+ , Mn 2+/3+ , Nb 5+ , Pb­(Mn 1/3 Sb 2/3 )­O 3 , Bi­(M n 1/2 Z r 1/2 )­O 3 , Bi­(Mn 2/3 Sb 1/3 )­O 3 , and GeO 2 . Ren et al found that the Nb 5+ donor doping in BS-PT not only improves the piezoelectric response but also suppresses the high temperature tan δ due to the decreased oxygen vacancy concentration, leading to a high d 33 ∼ 553 pC/N, T C ∼ 445 °C, and low tan δ < 2% in the temperature range of 150–300 °C.…”