Electric Current Dependent Fracture in GaN Piezoelectric Semiconductor Ceramics

Piezoelectric Ceramics Characterization

This review explores piezoelectric ceramics analysis and characterization. The focus is on polycrystalline ceramics; therefore, single crystals, polymeric materials and organic/inorganic composites are outside the scope of this review. To thoroughly grasp the behavior of a piezoelectric polycrystalline ceramic, a basic understanding of the ceramic itself should not be overlooked. To this end, w...

Characterisation of Piezoelectric Ceramics

The IEEE standard on piezoelectricity recommends methods to determine the coefficients of piezoelectric ceramics and the sizes of the samples to be used. A method to determine the difference between the actual coefficients and the coefficients determined using the IEEE standard is presented. The difference or error for samples of various shapes and sizes is presented. These errors and manufactu...

pharmaceutical application of nanocrystalline piezoelectric ceramics

THERMAL FRACTURE OF CERAMICS WITH TEMPERATURE-DEPENDENT PROPERnES

Some aspects of thetmal fracture mechanics of ceramics with temperature-dependent properties are studied. It is first shown that the square-root singular field still prevaiLY in the crack tip region. However, the size of the K-dominant zone may be influenced by the effect of temperature-dependent properties. Then the steady thetmal stress intensity factor in an edge-cracked strip is calculated....

Non-linear Properties of Piezoelectric Ceramics

Sensors and actuators based on piezoelectric ceramics are finding an increasingly large variety of applications under a very wide range of environmental conditions and applied signals. Some actuator applications require the piezoelectric materials to support large mechanical loads and produce high strain output. In order to accomplish this requirement of higher strains, large electric fields mu...