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Science Newsletter of the Faculty fo Physics
This is a new bulletin, which, as we hope, will bring fresh, updated information on scientific news, research activities, and related events in the life of our department to our staff members, undegraduate and graduate students, postdocs, collaborators and partners. We greatly hope that this Science Newsletter will help us to find new partners in research and shorten the way from fundamental research to applications and innovations, from our fundamental discoveries to their successful implementations in not too distant future.
XIV National School-Seminar "Wave phenomena in inhomogeneous media"
The conference papers from the School-Seminar «Waves-2014» will be submitted for publishing in the Memoirs of the Faculty of Physics journal.
| Journals » Memoirs of the Faculty of Physics » Issues » 2014 » # 5 |
Investigation of Piezoelectric Resonators Excited By Lateral Electric Field
B.D.Zaitsev, A.M.Shikhabudinov, I.A.Borodina, A.A.Teplykh, I.E.Kuznetsova
Saratov Branch of Institute of Radio Engineering and Electronics nm.V.A.Kotelnikov RAS, 410019, Saratov, Zelenaya str. 38, RussiaDuring last years the disigners of acoustic liquid sensors concentrate special attention on piezoelectric resonators with lateral electric field. The main problem of their development is the supression of unwanted oscillations. For achievement of this aim there exist at least two variants. Firstly, the choice of optimal shape of electrodes and exact their orientation respectively to crystallographic axes of plate. However the shape and dimensions of electrodes depend on shape of plate and its sizes. Secondly, the deposition of the damping layer around the electrodes including the certain part of electrodes. The paper is devoted to the experimental study of the influence of width of gap between electrodes and width of area of electrodes covered by damping layer on the frequency and $Q$ - factor of series and parallel resonances and electromecanical coupling coefficient. Electrodes of rectangular shape with dimensions 5 $\times$ 10 mm were deposited on the plate of lithium niobate of $X$ – cut with thickness of 0.5 mm. The width of the gap between electrodes and width of their coating area were changed from 1 to 5 mm. The lateral electric field was oriented along axis $Y$. It has been shown that the resonance was achieved on the longitudinal acoustic wave propagating along axis $X$ between electrodes. It has been found that changes in width of gap between electrodes and width of coating area vary frequencies of series and parallel resonances in the range of $\sim$1\%. At that the values of $Q$ – factor of series and parallel resonances change in ranges 500 - 13000 and 500 - 1800, respectively. The change in electromechanical coupling coefficient lies in range 1 - 4\%.
| URL: | http://uzmu.phys.sunmarket.com/abstract/2014/5/145329 |
| PACS: | 43.20.+g General linear acoustics |
| UDC: | 534.2 |
| Цитата: | Б.Д.Зайцев, А.М.Шихабудинов, И.А.Бородина, А.А.Теплых, И.Е.Кузнецова. Исследование пьезоэлектрических резонаторов с поперечным электрическим полем // Учен. зап. физ. фак-та Моск. ун-та. 2014. № 5. 145329 |