Pyroelectricity in strontium barium niobate/polyurethane nanocomposites for thermal/infrared detection

Dielectric properties of castor oil derived polymer filled with sol‐gel derived strontium barium niobate (Sr0.3Ba0.7Nb2O6) ferroelectric powder

“…Thus, SBN30 composition possesses good pyroelectric coefficient, at the same time low permittivity, which are the most important factors to improve the figures of merit for a material to act as a pyroelectric infra‐red/thermal detector. For SBN/PU based polymer‐ceramic nanocomposites it has been reported that pyroelectric coefficients of poled samples, increased from 81 to 385 l Cm −2 K −1 as the volume fraction of SBN30 increases from 0 to 0.25 . Figure of merit for detectivity (FD) also increased, respectively, from 48 to 283, 6.83 to 20.99, and 191 to 792, all in units of 10 −3 μC m J −1 , as the volume fraction of SBN30 increased from 0 to 0.25.…”

Transparent Thermotherapeutic Skin Patch Based on Highly Conductive and Stretchable Copper Mesh Heater

“…The thermal conductivity, density, specific heat and Poisson ratio for semipermeable film in the above equation were taken as 0.25 W m −1 K −1 , 1100 kg m −3 , 1420 J kg −1 K −1 and 0.48. [43][44] Ambient temperature was assumed to be 25 °C and the convective heat transfer coefficient was h = 12 W m −2 K −1 . [45] The dotted line in Figure 2a is the calculated time-dependent surface temperature using Equation ( 2), which agreed well with the experimental results.…”

Properties of Nanogenerator Materials for Energy-Harvesting Application

“…Spin-coating is a common approach in the deposition of nanocomposite thin films before energy harvesting and energy storage applications. To fabricate a thermal or infrared sensor, a material must have excellent ferroelectric properties, high pyroelectric constant, low dielectric loss, and low specific heat and thermal conductivity [14,15].…”