Effect of pore content on diffuse phase transition behaviour of porous 0.5BaZr0.2Ti0.8O3–0.5Ba0.7Ca0.3TiO3 ceramics

Porous ferroelectric materials for energy technologies: current status and future perspectives

“…The selection of the appropriate pore-forming agents is important, and it is essential that the pore-forming agents do not react with the ceramic matrix during the burn-out and sintering process. A number of pore-forming agents have been used to fabricate porous ferroelectric ceramics, which are often spherical in shape; these include polymers and organic materials such as polymethyl methacrylate (PMMA) spheres, 61 polyethylene oxide (PEO), 42 polyethylene (PE) beads, 62 stearic acid (SA), 63 polyvinyl chloride (PVC), 64 dextrin, 65 cellulose, 66 glucose, 23 saccharose, 67 and polystyrene 68 . In addition, non-spherical pore-forming agents have been used, such as polyethylene fiber and graphene.…”

“…When the temperature is higher than the TC, the relative permittivity of ferroelectric ceramics reduces according to the Curie-Weiss law. 23,[119][120][121] The Curie temperature is an important parameter for ferroelectric ceramics and it represents a limit of operation for ferroelectric devices, and there have been various studies focused on the impact of porosity of the Curie temperature. Zhang et al fabricated porous BCZT ceramics by the burnt-out polymer spheres method.…”

Effect of Porosity on Functional Properties of Lead-Free Piezoelectric BaZr0.15Ti0.85O3 Porous Ceramics

“…In the last several years, the majority of publications associated with the porosity influence on dielectric, piezoelectric and pyroelectric properties refer to lead zirconate titanate-based ceramics [6][7][8][9][10][11][12][13][14][15]. Only a few papers have reported the effect of porosity on the overall polarization-electric field (P-E) behaviour and DC tunability on lead-free porous ceramics [18][19][20]. This topic is of great interest, since BaTiO 3 -based ceramics will replace the lead-based materials in microelectronic applications in a few years.…”

Enhanced pyroelectric properties of porous Ba0.67Sr0.33TiO3 ceramics fabricated with carbon nanotubes

“…In recent years, porous materials have generated scientific interest since they are the ideal candidates for verifying the theories of multiphase materials developed over the past decades concerning the properties of multiphase materials [8]. For pyroelectric materials, porous ceramics have a lower heat capacity and dielectric constant.…”