Methanol Sensor Using Shear Horizontal Surface Acoustic Wave Device for Direct Methanol Fuel Cell

Endo, Saburo; Kondoh, Jun; Sato, Katsuhiko; Sawada, Naomi

doi:10.7567/jjap.51.07gc19

Cited by 6 publications

(9 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Force sensors [279][280][281][282][283][284][285] Object detection [286][287][288] Acceleration [289][290][291][292][293] Gyro sensors [294][295][296][297][298][299] Bio sensors 234,256,257,[300][301][302] Gas=chemical sensors 186,233,240,243,[246][247][248]250,251,253,254,261,303,304) Application of piezoelectric thin films 214,215,218,305) Microfluidic control 306) Continued on next page:…”

Section: General Topicmentioning

confidence: 99%

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Mizutani¹,

Wakatsuki²,

Ebihara³

2016

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Measurementthe act of measuring physical properties that we performhas the potential to contribute to the successful advancement of sciences and society. To open doors in physics and other sciences, various measurement methods and related applications have been developed, and ultrasound has remained a useful probe, power source, and interesting measurement object for the past two centuries. In this paper, we first summarize the basic principles of ultrasound from the viewpoint of measurement techniques for readers who just have started studying or are interested in the field of ultrasonic electronics. Moreover, we also introduce recent studiesultrasonic properties of materials, measurement techniques, piezoelectric devices, nonlinear acoustics, biomedical ultrasound, and ocean acousticsand their trends related to measurement techniques in ultrasonic electronics to provide some ideas for related applications.

show abstract

Section: General Topicmentioning

confidence: 99%

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Mizutani¹,

Wakatsuki²,

Ebihara³

2016

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Detection mechanism of the MeOH concentration is based on the electrical perturbation [4][5][6][7][8]. A reference liquid is assumed as nonelectrolyte and expressed as…”

Section: Fundamental Theory Of Electrical Perturbationmentioning

confidence: 99%

“…In this paper, methanol (MeOH) concentration detection of a direct methanol fuel cell (DMFC) has become the theme of research. In previous research, we developed estimation method of MeOH concentration at high temperature using 50 MHz SH-SAW sensor [6,7]. The proposed method was applied for the DMFC.…”

Section: Introductionmentioning

confidence: 99%

Online real-time monitoring method of methanol concentration for direct methanol fuel cell using shear horizontal surface acoustic wave

Kondoh

Nozawa

2014

2014 IEEE International Ultrasonics Symposium

Self Cite

View full text Add to dashboard Cite

If an online and real-time measurement system is realized using a shear horizontal surface acoustic wave (SH SAW), the SH-SA W sensor can be used in many fields. As detection principle of the SH-SA W is relative measurement, the SH-SA W sensor needs reference liquid. When the SH-SA W sensor is installed into a flow tube, it is difficult to measure reference liquid.In this paper, we discuss methanol concentration measurement method of a direct methanol fuel cell using the SH-SAW sensor.

show abstract

“…In particular, to obtain a higher frequency and wider bandwidth, the development of SAW propagation modes, substrate structures, and piezoelectric materials resulting in high coupling, high stability, low loss, tunability, and high phase velocity are required. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] The longitudinal-type leaky surface acoustic wave (LLSAW) has attracted interest for application to high-frequency SAW devices owing to its high phase velocity close to that of a longitudinal bulk wave. [17][18][19] However, it exhibits large inherent attenuation owing to the continuous radiation of shear horizontal and shear vertical bulk waves into the substrate.…”

Section: Introductionmentioning

confidence: 99%

Loss reduction of longitudinal-type leaky surface acoustic wave by loading with high-velocity thin film

Matsukura

Kakio

2014

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

A longitudinal-type leaky surface acoustic wave (LLSAW) has large inherent attenuation owing to the continuous radiation of two bulk waves. The attenuation of an LLSAW can be reduced by loading with an aluminum nitride (AlN) thin film with a higher bulk wave velocity than the substrate. In this study, to further reduce the attenuation of the LLSAW, we investigated the propagation properties of an LLSAW on an X-cut 36°Y-propagating LiNbO 3 (X36°Y-LN) substrate with an AlN thin film deposited by an RF magnetron sputtering system with a long-throw sputter cathode, in which the substrate is not exposed to plasma directly, by measurement using an interdigital transducer (IDT) pair with a wavelength λ of 8.0 or 4.8 µm. The insertion loss and bulk wave radiation loss into the substrate from the IDTs were markedly decreased by loading with the AlN thin film. When the film thickness was 0.250 λ for λ = 8.0 µm, the measured propagation loss decreased approximately tenfold from 0.28 dB/λ for the sample without the film to 0.03 dB/λ with the film. Furthermore, the temperature coefficient of delay was also reduced by loading with the AlN thin film.

show abstract

Methanol Sensor Using Shear Horizontal Surface Acoustic Wave Device for Direct Methanol Fuel Cell

Cited by 6 publications

References 14 publications

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Online real-time monitoring method of methanol concentration for direct methanol fuel cell using shear horizontal surface acoustic wave

Loss reduction of longitudinal-type leaky surface acoustic wave by loading with high-velocity thin film

Contact Info

Product

Resources

About