Application of Porous Ceramics

Porosity effect on the functional properties and energy harvesting performance of Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics

“…Another advantage of using porosity in ferroelectric ceramics instead of forming composites using cheap precursors and simple processing methods, like partial sintering, replica template, the use of pore-forming agents, and freeze casting. [13][14][15] Such porous ceramics are of increasing interest nowadays, driven by the effort to enhance functionality and performances in various piezoelectricbased applications, such as pressure and motion sensors, hydrophones, actuators in robotics, ultrasound generation, and energy harvesters. 1 There are studies that explore the correlation among porosity levels, piezoelectric properties, and energy storage applications.…”

“…Because ferroelectrics are usually characterized by a high relative permittivity (e.g., dense (Ba,Ca)(Ti,Zr)O 3 has ε r ∼2000 at room temperature), one approach to obtain an increased piezoelectric FOM is to reduce permittivity by the addition of pores ( ε r ∼ 1). Another advantage of using porosity in ferroelectric ceramics instead of forming composites using cheap precursors and simple processing methods, like partial sintering, replica template, the use of pore‐forming agents, and freeze casting 13–15 . Such porous ceramics are of increasing interest nowadays, driven by the effort to enhance functionality and performances in various piezoelectric‐based applications, such as pressure and motion sensors, hydrophones, actuators in robotics, ultrasound generation, and energy harvesters 1 …”