Effect of Nickel Niobate B-Site Precursors on Phase Formation, Microstructure and Dielectric Properties of Perovskite PNN Ceramics

Abstract

Relaxor perovskite lead nickel niobate (PNN) ceramics were fabricated by using B-site precursor method, in which both columbite-NiNb 2 O 6 and corundum-Ni 4 Nb 2 O 9 were separately employed as nickel niobate B-site precursors. It has been found that optimization of sintering condition can successfully lead to highly dense and pure PNN ceramics in both routes. Between the two B-site precursor routes, pure perovskite PNN ceramics with slightly better densification and dielectric properties can be produced by using the columbite-route.

Comparative Studies of Mixed-oxide Synthetic Routes for the Production of Ferroelectric PZN-based Ceramics

“…34-374 earlier reported by Srisombat et al [4] was found to co-exist along with perovskite PZN. This may be attributed to the loss of PbO after sintered at 1050 • C for prolong dwell time of 5 h, which is commonly found in other Pb-based perovskite systems [3,5]. On the other hand, a single phase of perovskite PZN was found in both the PZN-Z and PZN-ZB routes.…”