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11.
Acoustical Physics - The article studies the spectrum of acoustic oscillations generated by interdigital transducers in a plate made from a LiNbO3 piezocrystal with a thickness on the order of the... 相似文献
12.
An analytical expression for the magnitude of the “response” of surface acoustic waves (SAWs) to gases is obtained. It is
tested experimentally. The main features of the detection of gases by means of SAWs are predicted theoretically and confirmed
experimentally. The SAWs in coated and uncoated gas sensors are compared. A technique for using SAWs to determine the relative
changes in the density (Δρ/ρ) and the elastic moduli (ΔC
11/C
11 and ΔC
44/C
44) of films upon the adsorption (desorption) of gases is proposed. The possibility of using this technique to analyze adsorption
and desorption processes is demonstrated. The adsorption properties of polycrystalline, thermally deposited palladium films
before and after low-temperature vacuum annealing, as well as unannealed Pd and Pd:Ni films, are compared. The prospects of
using SAWs to detect gases and to study surface processes induced by them are discussed.
Zh. Tekh. Fiz. 68, 73–81 (February 1998) 相似文献