Electret, piezoelectret and piezoresistivity discovered in steels, with application to structural self-sensing and structural self-powering

@article{Xi2019ElectretPA,
  title={Electret, piezoelectret and piezoresistivity discovered in steels, with application to structural self-sensing and structural self-powering},
  author={Xiang Xi and D. D. L. Chung},
  journal={Smart Materials and Structures},
  year={2019},
  volume={28}
}
  • Xiang XiD. Chung
  • Published 7 June 2019
  • Materials Science, Physics
  • Smart Materials and Structures
Electret, piezoelectret, piezoresistivity and stress-dependent electric permittivity are reported in unmodified steels. Structural stress/strain self-sensing based on piezoelectret/piezoresistivity is demonstrated under tension. Structural self-powering is shown by the electret’s inherent electric field, (2.224 × 10−5) V m−1 and (1.051 × 10−5) V m−1, and power density, 29.2 and 41.8 W m−3, for low carbon steel and stainless steel, respectively, being enabled by the electret’s electrical… 

Electret behavior discovered in solder, specifically tin–silver

An electret is a permanent electric dipole exhibited by a material. This work provides the first report of the electret behavior of a solder, which is Sn–4Ag in the form of a fluxless unpoled wire of

References

SHOWING 1-10 OF 66 REFERENCES

Piezoelectricity, piezoresistivity and dielectricity discovered in solder

  • Xiang XiD. Chung
  • Materials Science
    Journal of Materials Science: Materials in Electronics
  • 2019
The performance and reliability of soldered joints are important for electronic packaging. This work provides the first observation of piezoelectricity (generating electric field and capacitance),

Cement-based piezoelectret

A cement-based piezoelectret is reported for the first time. Both poling during setting and sodium silicate liquid admixture strengthened the piezoelectret effect. The electret voltage increased upon

Unprecedented Capacitance-Based Nondestructive Evaluation of Steels

  • K. ShiD. Chung
  • Materials Science
    Journal of Materials Engineering and Performance
  • 2019
This work reports for the first time capacitance-based nondestructive evaluation (NDE) of a monolithic metal, namely steel. This means that the structural material is self-sensing, without the need

Energy harvesting from vibration with cross-linked polypropylene piezoelectrets

Piezoelectret films are prepared by modification of the microstructure of polypropylene foam sheets cross-linked by electronic irradiation (IXPP), followed by proper corona charging. Young’s modulus,

Zinc Oxide-Enhanced Piezoelectret Polypropylene Microfiber for Mechanical Energy Harvesting.

The results of this study demonstrated that the mechanical energy collection efficiency of TENG based on piezoelectret PP microfiber was greatly enhanced by the coated ZnO and high-voltage corona charging method.

A MEMS electret generator with electrostatic levitation for vibration-driven energy-harvesting applications

In this paper, we propose a passive gap-spacing control method in order to avoid stiction between top and bottom structures in in-plane sensor/actuator/generator applications. A patterned electret
...