Top Research Papers on Piezoelectric Materials

The Institute of Crystallography of the Russian Academy of Science is conducting a program aimed at the search for, the growth, and the investigation of new materials for different electronic applications: resonators, filters, UHF acoustic high-temperature receivers, temperature sensors, pressure sensors, acceleration sensors, etc. Different crystals have been grown by the following methods: (1) hydrothermal, (2) Czochralski, (3) from solution in the melt, and (4) from solutions. The grown crystals were investigated by resonance and ultrasonic methods in order to obtain information on elastic ...

A new method of using a barium titanate-BTO-polydimethylsiloxane composite porous foam catalyst to address the challenge of secondary pollution and reusable limits is reported.

This paper investigates material selection using technique for order preference by similarity to ideal solution (TOPSIS) and their comparison with figure of merits (FOMs) for piezoelectric material selections for energy harvester, sensor and actuator applications.

The discovery of a piezoelectric response in low density polypropylene (LDPP) suggests that other material, properly treated, might also exhibit both piezoelectric and pyroelectric properties. The search for new materials is inspired by the relatively low temperature (/spl sim/70degC) depolarization of LDPP and the desire to choose independently the mechanical and electrical properties of a transducer material. Composites of two different materials have been suggested to create a material with desirable mechanical properties and high temperature charge storage capabilities. These combination m...

To provide a satisfactory piezoelectric property and insulating property and containing no lead and potassium piezoelectric material. Piezoelectric material comprising: a perovskite type metal oxide represented by the following general formula (1) represented by: (NaxBa1-y) (NbyTi1-y) O3, where, satisfy the relation of 0.80≤x≤0.95 and 0.85≤y≤0.95 ; and a phase less than or equal to 1 mole of the perovskite-type metal oxide is not less than y × 0.05 mol% and y × 2 mol% copper.

The present invention, in the piezoelectric material is sintered at a low temperature of lead zirconate titanate mixed crystals based (PZT mixed crystal base), the PZT mixed crystals, substoichiometric relative stoichiometrically pure PZT mixed crystal a logical manner lead -, zirconium - and / or has a titanium content, and the PZT mixed crystals of silver, ≧ 0.005 to ≦ on the total weight of the other components of the PZT mixed crystal 0.21 material characterized in that it comprises an amount of mass%, a piezoelectric element including a piezoelectric material is sintered at the low temper...

Techniques are described for forming actuators having piezoelectric material. A block of piezoelectric material is bonded to a transfer substrate. The block is then polished. The polished surface is bonded to a MEMS body.

Etude de la densite et des proprietes electriques de materiaux composites comprenant des grains de ceramique piezoelectrique (titanate zirconate de plomb) dans une matrice tridimensionnelle formee de couches minces d'un materiau non piezoelectrique

: Piezo-composites composed of a piezoelectric ceramic and a polymer are promising materials because of their excellent tailorable properties. The geometry for two-phase composites can be classified according to the connectivity of each phase (1, 2 or 3 dimensionally) into 10 structures; 0-0, 0-1, 0-2, 0-3, 1-1, 1-2, 1-3, 2-2, 2-3 and 3-3. In particular, a 1-3 piezo-composite, or PZT-rod/polymer-matrix composite is considered most useful. The advantages of this composite are high coupling factors, low acoustic impedance, good matching to water or human tissue, mechanical flexibility, broad ba...

Abstract : The purpose of this monograph is to provide a source of data on a wide variety of piezoelectric materials which will be useful to those conducting research in this area as well as to the engineer designing ultrasonic transducers, filters, and other piezoelectric devices. The numerical data are given in the rationalized MKS system in accordance with the IRE Standards on Piezoelectricity, as are the symbols employed. Table I defines the symbols employed and gives their MKS unit. Since a large amount of literature still uses the CGS system, Table II presents the factors to convert CGS ...

Piezoelectric materials are demonstrated as a new source of sonodynamic sensitizers and BP nanosheet suggested as an excellent sensitizer for tumor sonodynamic therapy, thereby suppressing tumor growth and metastasis without causing off-target toxicity in tumor-bearing mouse models.

This technology combines expertise in organic materials science, electrochemistry, and clinical medicine, offering an innovative approach to addressing the crisis posed by hematoma compression in the spinal epidural space.

使用压电材料的滤波器。 一种滤波器，其包括压电基板和形成在所述压电基板上的多个叉指式换能器。 所述多个叉指式换能器中的至少一个具有经权度处理的主电极指图案。 具有所述主电极指图案的所述叉指式换能器还具有与所述主电极指图案并联连接的辅助电极指图案，并且所述辅助电极指图案产生表面声波，该表面声波抵消由在所述主电极指图案中产生的漏电场导致的表面声波。

Techniques are described for forming actuators having piezoelectric material. A block of piezoelectric material is bonded to a transfer substrate. The block is then polished. The polished surface is bonded to a MEMS body.

In this paper, the different applications of piezoelectric material (PZT) are surveyed such as: actuators, motors, transformers, sensors, and benders. The operation concept, advantages and disadvantages of these types are explained, that drive the suitable application of them. Moreover, the electrical and mechanical features of piezoelectric material are presented. These features are dynamic behavior, operation voltage, maximum force, and temperature effect. There are different piezoelectric material types such as ferroelectric materials and ferroelectric polymers that are presented and a comp...

It is envisaged that the piezoelectric ceramic may be developed and used as a novel material for bone replacement because of its mechanical properties and its cytocompatibility with bone tissue.

A piezoelectric ceramic material of the general formula: P in which: 0 <c ≤ 0.025; 0 ≤ d ≤ 0.05; 0 ≤ w ≤ 0.05; wherein P is a compound of the formula [Pb 0 <u ≤ 0.0495; 0 ≤ v ≤ 0.02, and D is a component of the general formula: [(M wherein M Pb (L wherein L is present in oxidation state II or III, and R in the oxidation state VI or V, and where: L L is selected L is selected

Pyroelectric, ferroelectric, and piezoelectric materials have been fabricated in bulk single crystals and in ceramic, thin- and thick-film, and composite forms. All of the major techniques are described depend on the applicability and convenience of fabricating bulk and MEMS-based energy harvesters. Notable examples include the following: • Triglycine sulfate (TGS)-type crystals have great potential in pyroelectric energy-harvesting applications based on its properties. However, it has attracted limited interest, possibly due to its low Curie temperature (49 °C). It is also water soluble, hyg...

Properties of piezoelectric crystals and ceramics are reviewed as they affect use of such materials in electroacoustic transducers. Extensive data on lead titanate-zirconate ceramics are presented to help in selection of the appropriate material for a variety of applications in the lower and medium frequency range, up to several megacycles per second. Quartz and several recently discovered piezoelectric crystals will share the higher megacycle range.

We introduce a new metric for judging material suitability for high frequency resonator use, and tabulate its value for a number of resonator materials. The new metric combines all the physical quantities associated with acoustic wave propagation in piezocrystals: mass density, dielectric permittivity, piezoelectric modulus, elastic stiffness, and viscosity. Use of this metric to rank materials yields some nonobvious and counterintuitive conclusions with implications for the directions the technology might take, and where the emphases for future progress might be placed.<<ETX>>