Enhanced Performance of Alkaline Niobate-based Ceramics Manufactured by Two-step Sintering

摘要

In this paper, a typical Li- and Ta/Sb- modified alkaline niobate-based ceramics were prepared by conventional sintering and two-step sintering respectively. The ceramics sintered by two-step sintering exhibited better electrical properties than the samples prepared by conventional sintering. The related mechanisms were also discussed in terms of phase-structures and microstructures. Results show that two-step sintering can restrain the volatilization of alkali elements and compositional segregation during the densification of alkaline niobate-based ceramics, and enhance the electrical properties accordingly. Therefore, two-step sintering is a promising approach to achieve high performance alkaline niobate-based ceramics.