ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Piezoelectric ceramic pressure sensors have been attracted great interest due to theirsimple and miniature structure compared with conventional sensors such as strain gauge sensor. Anew type of static pressure sensor by using a change of permittivity upon applied mechanicalpressure has been studied in this work. BaTiO3 ceramics with/without a small amount of Mn wereused as sensing materials and the effect of poling treatment on their sensor performance wasinvestigated. An anti-ferroelectric material, NaNbO3, was also examined. All materials coulddetect the change of pressure through the frequency shift of CR oscillator. Change of permittivityof non-doped BaTiO3 and Mn doped BaTiO3 without poling treatment were larger than that of PZTused as a reference, that is, BaTiO3 ceramics had higher-pressure sensitivity. BaTiO3 and relativematerials, however, needed transit time to reach the steady state, while NaNbO3 was independent tothe time. Conclusively, it seems that BaTiO3 and relative materials without poling treatment andthe anti-ferroelectric material, NaNbO3, become possible candidates as a pressure sensor usingpermittivity change
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.317-318.865.pdf
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