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Coprecipitated Cobalt Ferrite for Sensors

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Abstract:

In order to determine the influence of the sintering temperature on the performances of the magnetostrictive materials based sensor for stress, three series of cobalt ferrite (CoFe2O4) samples were prepared by coprecipitation method. These samples were sintered at 1050 °C, 1100 °C, 1150 °C. The spinel structure and the presence of the residual phases were investigated by X-ray diffractometry, scanning electron microscopy and vibrating sample magnetometry. Magnetostrictive properties of the samples were measured by strain gauge technique, in a direction which is parallel to the direction of the applied field. This study was focused on the influence of sintering temperature on magnetic properties and on magnetostriction coefficients. The study reveals that the increase of the sintering temperature increased the magnetostriction coefficients but decreased the strain derivative. Cobalt ferrite obtained by this method can be good candidates for sensors.

Keywords: COBALT FERRITE; COPRECIPITATION; MAGNETOSTRICTION; STRAIN GAUGE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/sl.2009.1067

Publication date: June 1, 2009

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  • The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
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