Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5438801 | Ceramics International | 2017 | 15 Pages |
Abstract
Lead-free bismuth sodium titanate-bismuth potassium titanate-barium titanate ceramic/cement composites with carbon nanotubes (CNTs) addition were developed for smart structures application. The pores in composite and insulating nature of the cement matrix made the poling difficult and lower piezoelectric activities of composites. In this work, CNTs additions as a conducting phase at 0-2% by volume was mixed with ceramic and Portland cement by pressing and curing method. The influence and optimum of CNTs content on the microstructure, dielectric, electrical conductivity, acoustic impedance and piezoelectric properties of composites were studied. The results indicate that the CNTs are filled in the pores between the hydration products of cement as observed using scanning electron microscope. The highest piezoelectric coefficient (d33) and piezoelectric voltage coefficient (g33) values of composite with CNTs content was found at 1% by volume where the values are 58 pC/N and 30.20 Ã 10â3 Vm/N, respectively. Therefore, CNTs content at 1% by volume was optimum for improvement of the piezoelectric properties for cement based-ceramic composites. All composites with CNTs content in the range tested were found to have good compatibility with concrete structure with matching acoustic properties.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Ruamporn Potong, Rattiyakorn Rianyoi, Athipong Ngamjarurojana, Arnon Chaipanich,