首頁 > 網路資源 > 大同大學數位論文系統

Title page for etd-0913116-131001


URN etd-0913116-131001 Statistics This thesis had been viewed 589 times. Download 60 times.
Author Wei-Han Hsia
Author's Email Address No Public.
Department Mechanical Engineering
Year 2015 Semester 2
Degree Master Type of Document Master's Thesis
Language zh-TW.Big5 Chinese Page Count 68
Title A Piezoelectric Toluene Sensor Based on TiO2 Nano Particles
Keyword
  • piezoelectric
  • titanium dioxide nano-particles
  • toluene sensor
  • Lithium Niobate
  • Lithium Niobate
  • toluene sensor
  • titanium dioxide nano-particles
  • piezoelectric
  • Abstract This thesis aims to develop a low-cost but high-sensitivity toluene sensor
    which can be operated at room temperature. First, the characteristics of Lithium Niobate bulk acoustic wave is calculated based on Christoffel formula, and further the cut angle and electric field direction are determined for attaining high piezoelectric coupling coefficient. A dual delay line system is configured to reduce the environmental interference; the system is composed of two Pierce oscillators, a mixer, and a low-pass filter. The commercially available titanium dioxide nano-particles are prepared as the sensing material of toluene. The nano-particles are coated uniformly on the Lithium Niobate wafer by spin coating. The X-ray diffraction (XRD) and field emission gun scanning electron microscopy (FEG-SEM) are utilized for the characteristic evaluation of the titanium dioxide nano-particles. Finally, air and toluene of different concentrations are injected into the 500 mL chamber by turns at a flow rate of 400 c.c./min. The results show the frequency shift on toluene of 25, 50, 100, 150, and 200 ppm are 11.3, 39.6, 53.1, 78.7, and 111.2 Hz, respectively. The sensor developed in the study is confirmed to detect toluene successfully at room temperature.
    Advisor Committee
  • Yung-Yu Chen - advisor
  • Ching-Chih Tai - co-chair
  • Shih-Yung Pao - co-chair
  • Files indicate access worldwide
    Date of Defense 2016-07-29 Date of Submission 2016-09-13


    Browse | Search All Available ETDs