Piezoelectric properties of 3-<i>X</i>periodic Pb(ZrxTi1−x)O3–polymer composites

Smay, James E.; Cesarano, Joseph; Tuttle, Bruce A.; Lewis, Jennifer A.

doi:10.1063/1.1513202

Cited by 70 publications

(51 citation statements)

References 42 publications

(47 reference statements)

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“…Performance of the single-crystal device will be measured and compared with the performance of two identical devices constructed with standard piezoceramic fibers. We also will compare our experimental results with analytical estimates based upon simple iso-strain mixing rules for diphasic piezoelectric composites (Newnham, et al, 1978;Smay, et al, 2002). Orthotropic elastic properties of the single-crystal device, based upon micromechanics models successfully used to compute standard MFC properties (Williams, et al, 2002;Williams, 2004), will also be presented.…”

Section: Iintroductionmentioning

confidence: 99%

Anisotropic Laminar Piezocomposite Actuator Incorporating Machined PMN–PT Single-crystal Fibers

Wilkie

Inman²,

Lloyd

et al. 2006

Journal of Intelligent Material Systems and Structures

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The design, fabrication, and testing of a flexible, laminar, anisotropic piezoelectric composite actuator utilizing machined PMN-32%PT single crystal fibers is presented. The device consists of a layer of rectangular single crystal piezoelectric fibers in an epoxy matrix, packaged between interdigitated electrode polyimide films. Quasistatic freestrain measurements of the single crystal device are compared with measurements from geometrically identical specimens incorporating polycrystalline PZT-5A and PZT-5H piezoceramic fibers. Free-strain actuation of the single crystal actuator at low bipolar electric fields (± 250 V/mm) is approximately 400% greater than that of the https://ntrs.nasa.gov/search

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Section: Iintroductionmentioning

confidence: 99%

Anisotropic Laminar Piezocomposite Actuator Incorporating Machined PMN–PT Single-crystal Fibers

Wilkie

Inman²,

Lloyd

et al. 2006

Journal of Intelligent Material Systems and Structures

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“…On the other hand, typical high-dielectric constant materials, such as ferroelectric ceramics, are brittle and require high-temperature processing [5] which are often not compatible with current circuit integration technologies. The ideal solution would be high-K materials that are mechanically robust and process able at ambient temperatures have to be incorporated with suitable polymers such as ferroelectric ceramic-polymer composites that may combine desired properties of the components [6,7]. An important attribute of polymers is the ability to modify their inherent physical properties by the addition of fillers while retaining their characteristics.…”

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confidence: 99%

Mechanical properties of ceramic-polymer nanocomposites

Abraham¹,

Kuryan²,

Isac³

et al. 2009

Express Polym. Lett.

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Nano crystalline powders of Barium Sodium Niobate (BNN) with the composition Ba3–2x Na4+x R Nb10 O30 with (R stands for rare earth = 0, x = 0) have been prepared by conventional ceramic technique. Barium Sodium Niobate can form a wide range of solid solutions, incorporating rare earth and alkali, alkaline earth elements with different compositions. The powder belonged to tungsten bronze type structure with tetragonal symmetry and lattice constants a = b = 1.2421 nm and c = 0.3903 nm. XRD (X-ray Diffraction) SEM (Scanning Electron Microscope) and AFM (Atomic Force Microscope) studies revealed that the particle size is in the nanometer range. Composites are prepared by mixing powders of BNN with polystyrene at different volume fractions of the BNN. Melt mixing technique is carried out in a Brabender Plasticoder at a rotor speed of 60 rpm (rotations per minute) for composite preparation. Mechanical properties such as stress-strain behavior, Young’s modulus, tensile strength, strain at break etc. are evaluated. Addition of filler enhances the mechanical properties of the polymer such as Young’s modulus and tensile strength. The composites showed the trend of perfect adhesion between the filler and the polymer. The filler particles are distributed relatively uniform fashion in all composites and the particles are almost spherical in shape with irregular boundaries. To explore more carefully the degree of interfacial adhesion between the two phases, the results are analyzed by using models featuring adhesion parameter. The experimental results are compared with theoretical predictions

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“…The latter is related to the brittle nature of the ceramic filler, and to the possibility that distributed ceramic particles could act as stress raisers. Ideally, mechanically robust and processable at ambient temperature, tiny high-k materials could be incorporated within suitable polymers to form composites that combine desired properties of both components [14][15][16]. Ceramic/polymer nanocomposites should retain advantages emanating from the reinforcing phase, such as high dielectric permittivity, excellent thermal stability and high stiffness in compression, and the polymer matrix, such as low density, flexibility, facile processability, and high dielectric breakdown strength [17].…”

mentioning

confidence: 99%

Barium titanate/polyester resin nanocomposites: Development, structure-properties relationship and energy storage capability

Asimakopoulos¹,

Psarras²,

Zoumpoulakis³

2014

Express Polym. Lett.

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Abstract. Nanocomposite materials based on two different types of polyester matrix (a commercial type and a laboratory produced one) with embedded barium titanate nano-particles were developed and characterized. Structural and morphological characteristics of the produced composite specimens were studied via X-ray diffraction, Fourier transformation infra red spectroscopy, and scanning electron microscopy. Thermal, mechanical and electrical performance was examined via differential scanning calorimetry, bending and shear strength tests, and broadband dielectric spectroscopy, respectively. Mechanical strength appears to reduce with the increase of filler content. Commercial polyester's composites exhibit brittle behaviour, while laboratory polyester's composites exhibit an elastomeric performance. Dielectric data reveal the presence of four relaxation processes, which are attributed to motion of small parts of the polymer chain (!-mode), re-arrangement of polar side groups ("-mode), glass to rubber transition of the polymer matrix (#-mode) and Interfacial Polarization between the systems' constituents. Finally, the energy storing efficiency of the systems was examined by calculating the density of energy. Vol.8, No.9 (2014) 692-707 Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2014.72 * Corresponding author, e-mail: G.C.Psarras@upatras.gr © BME-PT An outstanding position in the group of electroceramics is given to composite materials based on barium titanate. Barium titanate is a wide band gap semiconductive ferroelectric material with perovskite structure which has been of practical importance for over 60 years due to its specific electrical properties. Barium titanate's great significance is expressed in its applications, which include ceramic capacitors, PTCR thermistors (positive temperature coefficient resistors/thermistors or posistors), piezoelectric sensors, optoelectronic devices, transducers, actuators etc. [4][5][6][7][8][9][10]. Furthermore, it is being applied as a capacitive material in dynamic random access memories (DRAM) in integrated circuits. DRAM applications require both high dielectric constant and good insulating properties [10]. Semiconductor memories such as dynamic random access memories (DRAM's) and static random access memories (SRAM's) currently dominate the market. However, the disadvantage of these memories is that they are volatile, i.e. the stored information is lost when the power fails. The non-volatile memories available at this time include complementary metal oxide semiconductors (CMOS) with battery backup and electrically erasable read only memories (EEPROM's). These non-volatile memories are very expensive. The main advantages offered by ferroelectric random access memories (FRAM's) include non-volatility and radiation hardened compatibility with CMOS and GaAs circuitry, high speed (30ns cycle time for read/erase/rewrite) and high density (4 (µm) 2 /cell size) [11]. Up to now, the most important utility of BaTiO 3 / polymer composites is ...

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Piezoelectric properties of 3-Xperiodic Pb(ZrxTi1−x)O3–polymer composites

Cited by 70 publications

References 42 publications

Anisotropic Laminar Piezocomposite Actuator Incorporating Machined PMN–PT Single-crystal Fibers

Anisotropic Laminar Piezocomposite Actuator Incorporating Machined PMN–PT Single-crystal Fibers

Mechanical properties of ceramic-polymer nanocomposites

Barium titanate/polyester resin nanocomposites: Development, structure-properties relationship and energy storage capability

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