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題名 | 表面聲波在液體負載之波傳特性=Liquid Loading Effects on Propagation Characteristics of Surface Acoustic Waves |
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作者 | 羅如燕; 李明利; Ro, Ruyen; Lee, Mingly; |
期刊 | 中華民國音響學刊 |
出版日期 | 19970600 |
卷期 | 4:2 1997.06[民86.06] |
頁次 | 頁30-39 |
分類號 | 448.5 |
語文 | chi |
關鍵詞 | 表面聲波; 壓電陶瓷; 壓電生化感測器; Surface acoustic wave; Piezolectric ceramic; Piezoelectric biochemical sensor; |
中文摘要 | 本文主要探討在液體介質負載下,在壓電基板表面傳播的表面聲波( Surface Acoustic Wave, SAW )之波傳特性。 液體負載本身之密度、聲波阻抗、介電特性及傳導性 對表面聲波之影響,可經由理論推導,並列用數值分析的方法加以瞭解。本文所採用的壓電 基材為具有高機電耦合係數的鈮酸鋰( LiNbO �陛^、 鉭酸鋰( LiTaO �陛^及石英( Quartz )等三種材料。 此三種材料在不同切面下及在不同傳播方向之傳播模式和液體負載 對其之影響為本文研究重點;此結果可用於爾後設計具有高靈敏度的生化及化學壓電陶瓷微 感測器。 |
英文摘要 | This paper discusses liquid loading effects on propagation characteristics of surface acoustic waves. Material properties of liquid loading, e.g., density, acoustic impedance, dielectric constant, and conductivity, can contribute to variations of phase velocity and attenuation constant of surface acoustic waves. This effects can be realized through theoretical analysis and numerical simulation. Several piezoelectric materials, e.g., lithium niobate (LiNbO �� ), lithium tantalate (LiTaO �� ), and quartz, are adopted for simulation in this paper because of their effective electromechanical transduction mechanism. Propagation characteristics of these piezoelectric ceramic over different cut surfaces and along different propagation directions as well as liquid loading effects of them are primary concerned in this paper. Results obtained can be beneficial to design highly sensitive chemical and biochemical piezoelectric microsensors. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。