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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >High temperature blocking force measurements of soft lead zirconate titanate
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High temperature blocking force measurements of soft lead zirconate titanate

机译：锆钛酸铅软铅的高温阻滞力测量

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摘要

Piezoelectric actuators outperform other technological solutions in the area of high-speed, high-force and high-accuracy displacement, but are only able to generate strains of about 0.2%. The load capability is generally quantified in terms of a blocking force, which is the force sustained under electric field at zero displacement. Stress-strain curves in a temperature regime from room temperature up to 150 °C on electrically loaded soft lead zirconate titanate (PZT) are generated to determine the blocking stress. The ensuing nonlinear behaviour is discussed in terms of ferroelectric and ferroelastic switching and contrasted to idealized linear constitutive behaviour as often assumed by manufacturers. The blocking stress is shown to increase with temperature due to an additional stiffening effect as a function of electric field. The actual mechanical work done is found to be larger than in the idealized case where linear constitutive behaviour is assumed.
机译：压电执行器在高速，高力和高精度位移方面优于其他技术解决方案，但只能产生约0.2％的应变。负载能力通常根据阻挡力来量化，该阻挡力是在零位移的电场下承受的力。在电加载的软锆钛酸铅钛酸盐（PZT）上，在室温至150°C的温度范围内，产生应力-应变曲线，以确定粘连应力。随后的非线性行为根据铁电和铁弹性开关进行了讨论，并与制造商经常假设的理想线性本构行为进行了对比。由于附加的加劲作用，电场引起的阻塞应力随着温度的升高而增加。发现完成的实际机械功大于假定线性本构行为的理想情况。

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