Fracture resistance of a doped PZT ceramic for multilayer piezoelectric actuators: Effect of mechanical load and temperature

Bermejo, Raúl; Grünbichler, Hannes; Kreith, Josef; Auer, Christoph

doi:10.1016/j.jeurceramsoc.2009.08.013

Cited by 35 publications

(12 citation statements)

References 24 publications

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“…Nevertheless, the fracture toughness decreases with increasing temperature, because the effect of the decreasing remanent strain which prompts a lower toughening effect, is stronger than the effect of the larger process zone. Decreasing fracture toughness values with increasing temperature were found for PZT and BZT – BCT as well. At 220°C, which is ~30°C above

T_{normalF ‐ normalR}

, no difference between the unpoled and poled samples was observed.…”

Section: Resultsmentioning

confidence: 81%

Short crack fracture toughness in (1−x)(Na_1/2Bi_1/2)TiO₃–xBaTiO₃ relaxor ferroelectrics

et al. 2017

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The fracture toughness in the lead-free relaxor ferroelectric (1Àx)(Na 1/2 Bi 1/2 ) TiO 3 -xBaTiO 3 was investigated utilizing the surface crack in flexure method. To allow a comprehensive assessment, unpoled, and poled samples from the rhombohedral, the tetragonal, and the morphotropic phase regime were considered. It was found that the fracture toughness is up to 23% higher for the poled state. In order to cover the transition from ferroelectric to relaxor phase, the temperature dependence of 0.97(Na 1/2 Bi 1/2 )TiO 3 -0.03BaTiO 3 was studied as well. Fracture toughness values of up to 2 MPam 1/2 were determined, which are considerably above data for lead zirconate titanate materials. The results are rationalized using a simple transformation toughening-type model in conjunction with investigations into the ferroelastic behavior. The presented model can be applied without fitting parameters but utilizes measurements of the coercive stress and remanent strain as well as the elastic modulus. K E Y W O R D Sferroelastic materials, fracture mechanics/toughness, lead-free ceramics, mechanical properties, relaxors

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T_{normalF ‐ normalR}

, no difference between the unpoled and poled samples was observed.…”

Section: Resultsmentioning

confidence: 81%

Short crack fracture toughness in (1−x)(Na_1/2Bi_1/2)TiO₃–xBaTiO₃ relaxor ferroelectrics

et al. 2017

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“…Therefore, knowledge about the temperature-dependent fracture behavior and the toughening mechanisms in ferroelectric ceramics is of critical technological relevance [27]. The fracture toughness ( ) of the material plays an important role in the design process of new applications [28]. In PZT and other ferroelectric ceramics, an increase of the fracture toughness with increasing crack length was found [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Temperature-dependent R-curve behavior of the lead-free ferroelectric 0.615Ba(Zr0.2Ti0.8)O3–0.385(Ba0.7Ca0.3)TiO3 ceramic

Vögler

Acosta

Brandt

et al. 2015

Engineering Fracture Mechanics

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“…Error bars represent the standard deviation derived from five measurements. A good agreement between experiment and numerical simulation expressing approximately quadratic increase of average flow-rate has been obtained up to amplitude of excitation signal of 300 V. Further increase is in practice limited by the PZT depolarization [26] and/or by irreversible actuator damage at very large membrane deformations [27]. …”

Section: Numerical Simulation Modelmentioning

confidence: 69%

A Strip-Type Microthrottle Pump: Modeling, Design and Fabrication

Pečar

Vrtačnik

Resnik

et al. 2013

Sensors

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A novel design for a strip-type microthrottle pump with a rectangular actuator geometry is proposed, with more efficient chip surface consumption compared to existing micropumps with circular actuators. Due to the complex structure and operation of the proposed device, determination of detailed structural parameters is essential. Therefore, we developed an advanced, fully coupled 3D electro-fluid-solid mechanics simulation model in COMSOL that includes fluid inertial effects and a hyperelastic model for PDMS and no-slip boundary condition in fluid-wall interface. Numerical simulation resulted in accurate virtual prototyping of the proposed device only after inclusion of all mentioned effects. Here, we provide analysis of device operation at various frequencies which describes the basic pumping effects, role of excitation amplitude and backpressure and provides optimization of critical design parameters such as optimal position and height of the microthrottles. Micropump prototypes were then fabricated and characterized. Measured characteristics proved expected micropump operation, achieving maximal flow-rate 0.43 mL·min−1 and maximal backpressure 12.4 kPa at 300 V excitation. Good agreement between simulation and measurements on fabricated devices confirmed the correctness of the developed simulation model.

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Fracture resistance of a doped PZT ceramic for multilayer piezoelectric actuators: Effect of mechanical load and temperature

Cited by 35 publications

References 24 publications

Short crack fracture toughness in (1−x)(Na_1/2Bi_1/2)TiO₃–xBaTiO₃ relaxor ferroelectrics

Short crack fracture toughness in (1−x)(Na_1/2Bi_1/2)TiO₃–xBaTiO₃ relaxor ferroelectrics

Temperature-dependent R-curve behavior of the lead-free ferroelectric 0.615Ba(Zr0.2Ti0.8)O3–0.385(Ba0.7Ca0.3)TiO3 ceramic

A Strip-Type Microthrottle Pump: Modeling, Design and Fabrication

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Fracture resistance of a doped PZT ceramic for multilayer piezoelectric actuators: Effect of mechanical load and temperature

Cited by 35 publications

References 24 publications

Short crack fracture toughness in (1−x)(Na1/2Bi1/2)TiO3–xBaTiO3 relaxor ferroelectrics

Short crack fracture toughness in (1−x)(Na1/2Bi1/2)TiO3–xBaTiO3 relaxor ferroelectrics

Temperature-dependent R-curve behavior of the lead-free ferroelectric 0.615Ba(Zr0.2Ti0.8)O3–0.385(Ba0.7Ca0.3)TiO3 ceramic

A Strip-Type Microthrottle Pump: Modeling, Design and Fabrication

Contact Info

Product

Resources

About

Short crack fracture toughness in (1−x)(Na_1/2Bi_1/2)TiO₃–xBaTiO₃ relaxor ferroelectrics

Short crack fracture toughness in (1−x)(Na_1/2Bi_1/2)TiO₃–xBaTiO₃ relaxor ferroelectrics