Lead-Free Barium Titanate Ceramics with Large Piezoelectric Constant Fabricated by Microwave Sintering

概要

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A lead-free barium titanate (BaTiO3) ceramics with a high density and a large piezoelectric constant, $d_{33}$, as manufactured at 1320°C by microwave sintering, using a pure fine powder with a particle size of 100 nm produced by hydrothermal synthesis. The density of the ceramic with a 3.4 μm grain size was more than 98.3% of the theoretical value. The ceramic after poling had a dielectric constant of $\varepsilon _{33}^{T}/\varepsilon _{0} =4200$, an electromechanical coupling factor planar mode of $k_{ p} =36$% and $d_{33} =350$ pC/N. The value of $d_{33}$ is the largest one ever reported for lead-free BaTiO3 ceramics.
Japan Society of Applied Physicsの論文
2006-01-25