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Synthesis of barium titanate piezoelectric ceramics for multilayer actuators (MLAs)

Biglar M., Stachowicz F., Trzepieciński T., Gromada M.

Acta Mechanica et Automatica

2017

Vol. 11, no. 4

275--279

In this paper the characteristics of BaTiO3 ceramics synthesized by solid state method is presented. In order to receive the monophase ceramics the double activation and calcination were applied. A spray drier was used to granulate the powder of BaTiO3. Isostatic and uniaxial pressing were applied to manufacture the barium titanate pellets. The properties of fabricated BaTiO3 ceramics were determined at different stages of production. After the sintering phase, the hardness, the bending strength, the fracture toughness, and the coefficient of thermal expansion of barium titanate sinter were estimated. The BaTiO3 powder is characterized by spherical grains and the average size of 0.5 μm. The small value of the specific surface area of granulate ensured good properties of material mouldability and finally allowed to receive sinters of high density

The construction and characteristics of a piezoelectric motor using a harmonic drive

King T., Xu W.

Applied Mechanics and Engineering

2000

Vol. 5, no 1

169-182

The construction and characteristics of a newly developed piezomotor are presented. The motor uses a harmonic drive principle, coupled with flexure hinged mechanical displacement amplifiers, to yield a form of positive drive stepping motor suitable for use in open loop speed and position control applications. Comparison with previous harmonic piezomotors and other piezomotors shows a useful performance improvement has been achieved.