Abstract
BaZrO3 and BaHfO3 modified polycrystalline BaTiO3 are candidate materials for transverse mode and pyroelectric charge coupled device (CCD) arrays. Addition of 3–4% barium zirconate and barium hafnate to barium titanate alters the temperature of phase transformations and with it, dielectric and pyroelectric properties. These additions create a temperature range close to room temperature where the pyroelectric coefficient is extremely high relative to the dielectric permittivity. These materials show a very high figure of merit for dielectric bolometer applications that is competitive with existing materials, while being relatively easy to prepare.
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Deb, K.K., Hill, M.D. & Kelly, J.F. Pyroelectric characteristics of modified barium titanate ceramics. Journal of Materials Research 7, 3296–3305 (1992). https://doi.org/10.1557/JMR.1992.3296
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DOI: https://doi.org/10.1557/JMR.1992.3296