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Fiber-reinforced cement for piezoelectricity and pyroelectricity
Fiber-reinforced Cement for piezoelectricity and pyroelectricity is introduced, as these phenomena are useful for the sensing of strain and temperature. The use of short steel fibers (8 gm diameter), together with polyvinyl alcohol, as admixtures greatly enhances these effects, thereby attaining longitudinal piezoelectric coupling coefficient 3 x 10 -8 m/V (10 kHz), and pyroelectric coefficient 6 x 10 -1 C/m2.K (10 kHz). The piezoelectric effect is comparable in magnitude to that of PZT. However, due to the high value (2,500) of the relative dielectric constant, the piezoelectric voltage coefficient and pyroelectric voltage are comparable to or even lower than those of plain cement paste or Carbon fiber (15 micrometer diameter) cement paste. Carbon fiber cement paste and plain cement paste are comparable in the piezoelectric coupling coefficient, piezoelectric voltage coefficient and pyroelectric voltage, though the pyroelectric coefficient is higher for carbon fiber cement paste than plain cement paste.
Fiber-reinforced cement for piezoelectricity and pyroelectricity
Fiber-reinforced Cement for piezoelectricity and pyroelectricity is introduced, as these phenomena are useful for the sensing of strain and temperature. The use of short steel fibers (8 gm diameter), together with polyvinyl alcohol, as admixtures greatly enhances these effects, thereby attaining longitudinal piezoelectric coupling coefficient 3 x 10 -8 m/V (10 kHz), and pyroelectric coefficient 6 x 10 -1 C/m2.K (10 kHz). The piezoelectric effect is comparable in magnitude to that of PZT. However, due to the high value (2,500) of the relative dielectric constant, the piezoelectric voltage coefficient and pyroelectric voltage are comparable to or even lower than those of plain cement paste or Carbon fiber (15 micrometer diameter) cement paste. Carbon fiber cement paste and plain cement paste are comparable in the piezoelectric coupling coefficient, piezoelectric voltage coefficient and pyroelectric voltage, though the pyroelectric coefficient is higher for carbon fiber cement paste than plain cement paste.
Fiber-reinforced cement for piezoelectricity and pyroelectricity
Wen, S. (author) / Chung, D.D.L. (author)
2003
14 Seiten, 6 Bilder, 2 Tabellen, 34 Quellen
Conference paper
English
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