کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7137806 | 1461899 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cantilever resonator based on the electrostriction effect in Gd-doped ceria
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Thin films of Ce0.8Gd0.2O1.9, which have recently been shown to demonstrate giant electrostriction, are proposed as the active material for miniature cantilever resonators and actuators. In the absence of strain, these films have an electrostriction coefficient within the range of 2-10Â kPa/(kV/cm)2, as compared with the somewhat larger values for the best commercial electrostrictors (e.g. PbMn1/3Nb2/3O3, 62Â kPa/(kV/cm)2. At the same time, Ce0.8Gd0.2O1.9 films can generate stress >70Â MPa which is competitive with materials currently in use and only limited by the strength of the film-substrate interface. In this report, we investigate two aspects of the practical application of Ce0.8Gd0.2O1.9 as a resonator: the fabrication conditions and the frequency dependence of the electrostrictive behavior. We show that the films can display electromechanical response with frequencies up to 6Â kHz. With respect to fabrication, we show that Ce0.8Gd0.2O1.9 films have a number of technological advantages when compared to the lead titanate based materials currently in use: (a) they can be deposited on a variety of metal contacts and substrates, including silicon; (b) they do not require high temperature processing; and (c) because Ce0.8Gd0.2O1.9 has cubic symmetry, it can in principle be used as a polycrystalline film with arbitrary texture and does not require poling. In addition, neither Ce nor Gd nor their oxides are toxic; the oxides have very low vapor pressure; and the cations, being highly charged do not diffuse into Si. Consequently, Ce0.8Gd0.2O1.9 films may be readily and advantageously integrated into existing semiconductor fabrication technologies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 201, 15 October 2013, Pages 73-78
Journal: Sensors and Actuators A: Physical - Volume 201, 15 October 2013, Pages 73-78
نویسندگان
Roman Korobko, Ellen Wachtel, Igor Lubomirsky,