TY  - CONF
A1  - Malik, A.F.
A1  - Burhanudin, Z.A.
A1  - Jeoti, V.
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-84857066766&doi=10.1109%2fNatPC.2011.6136384&partnerID=40&md5=d9883586b71af589a5696e3f1eb289c4
Y1  - 2011///
SN  - 9781457718847
N1  - cited By 7; Conference of 3rd National Postgraduate Conference - Energy and Sustainability: Exploring the Innovative Minds, NPC 2011 ; Conference Date: 19 September 2011 Through 20 September 2011; Conference Code:88531
N2  - The focus of this paper is to explore a most suitable piezoelectric material for a surface acoustic wave (SAW) sensor to monitor corrosion for curved and complex surfaces at elevated temperatures. A comparison between piezocrystal Quartz and piezopolymers PVDF and Polyimide is made on the basis of simulation. It is found that Piezoelectric Polyimide is a promising material that fulfils our requirements. Finally a flexible Polyimide based surface acoustic wave (SAW) delay line is proposed to detect and monitor corrosion. It consists of a pair of Interdigital Transducers (IDTs) and an intermediate metal sensing element. Generation and detection of SAW on Polyimide piezoelectric substrate are obtained through input and output IDTs made of highly corrosive resistant material i.e. platinum (Pt). The SAW is propagated between the IDTs and underneath a sensing element made of iron (Fe). The device parameters like central frequency, SAW wavelength, number of finger pairs and others are designed using impulse response model. The theoretical phase shift as a function of sensing element's thinness is calculated using mathematical equations and then compared to the phase shift obtained using coupling-of-mode (COM) Model. It is found that thinner the sensing element, the higher the phase shift, especially when thinness of sensing element is at nm scale. It is also noticed that at central frequency greater than 400 MHz, the phase shift is quite high and easily measureable. Since corrosion can be considered as thinning of a metallic element, the results suggest that it is feasible to develop a flexible Polyimide SAW based sensor for corrosion detection. © 2011 IEEE.
ID  - scholars1736
TI  - A flexible Polyimide based SAW delay line for corrosion detection
KW  - Central frequency; Complex surface; Corrosion detection; Coupling of modes; Delay line; Device parameters; Elevated temperature; Flexible polyimide; IDT; Impulse response model; Input and outputs; Interdigital transducer; Mathematical equations; Metal sensing; Metallic elements; Number of fingers; Piezoelectric polyimides; Piezoelectric substrates; SAW delay line; Sensing elements; Surface acoustic wave sensors; Surface acoustic waves
KW  -  Acoustic surface wave devices; Acoustic waves; Acoustoelectric effects; Corrosion; Functions; Phase shift; Phase shifters; Piezoelectricity; Platinum; Quartz; Saws; Sensors; Sustainable development; Ultrasonic transducers; Waves
KW  -  Polyimides
CY  - Perak
AV  - none
ER  -