Synthesis, structure, and dielectric properties of a new binary antiferroelectric solid solution: (1−x)Pb(Mg1/2W1/2)O3–xPbHfO3
Abstract
Dielectric ceramics are one of the most important electrical insulators because of their excellent electrical stability and nonconducting properties. In this work, new complex perovskite solid solutions, (1−x)Pb(Mg1/2W1/2)O3–xPbHfO3 [(1−x) PMW–xPHf] (0.00 ≤ x ≤ 0.04), were successfully synthesized in the form of ceramics by the solid‐state reaction method and sintering process. The X‐ray diffraction results indicate that a single perovskite phase with antiferroelectric (AFE) orthorhombic Pmcn symmetry is formed for x 0.04 which corresponds to the PMW‐type solid solution (SS‐PMW). For the composition x = 0.04, however, a small amount (about 1%) of ferroelectric orthorhombic C2mm phase that arises from the PHf‐type solid solution (SS‐PHf) was found to coexist with the Pmcn phase (99%). The dielectric measurements show that the AFE‐paraelectric phase transition temperature TC of the (1−x)PMW–xPHf ceramics increases from 38.2°C (x = 0) to 40.1°C (x = 0.03) with the increasing PHf content, indicating a slightly enhanced AFE ordering degree. The studied materials show a relatively low dielectric constant (~102), a low dielectric loss (~10−2), a high breakdown field strength (~140 kV/cm), and a linear electric field dependence of polarization at room temperature, which make them a new candidate for potential applications as ceramic insulators.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 31, 2018
- Source ID
- 10.1111/jace.15989
Entities
People
- Hua Wu
- Pan Gao
- Wei Ren
- Zenghui Liu
- Zuo-Guang Ye
Organizations
- Donghua University
- National Natural Science Foundation of China
- Natural Sciences and Engineering Research Council
- Office of Naval Research
- Simon Fraser University
- Xi'an Jiaotong University