Mass sensitivity of thickness-twist modes in a rectangular piezoelectric plate of hexagonal crystals

2007 ◽  
Vol 54 (4) ◽  
pp. 882-887 ◽  
Author(s):  
Jiashi Yang ◽  
Ziguang Chen ◽  
Yuantai Hu
Keyword(s):  
Piezoelectric Plate ◽  
Mass Sensitivity ◽  
Hexagonal Crystals ◽  
Rectangular Piezoelectric Plate

Concept of the Partial Throw-Away Design of Piezoelectric Micropump for Medical Uses with Low Cost and Waste

2013 ◽  
Vol 477-478 ◽  
pp. 363-367
Author(s):  
Wen Fu Luo ◽  
Rong Huei Chen ◽  
Hsiao Kang Ma
Keyword(s):  
Flow Rate ◽  
Mechanical Model ◽  
Piezoelectric Plate ◽  
Low Cost ◽  
Maximum Flow ◽  
Maximum Flow Rate ◽  
Waste Solution ◽  
Pump Chamber ◽  
Single Use ◽  
Rectangular Piezoelectric Plate

In this study, piezoelectric micropumps with partial throw-away design have been developed and discussed. The actuator, a rectangular piezoelectric plate, can be separated from the pump body and be used repeatedly while the pump chamber is single-use to prevent infection. Thus, a low cost and waste solution for biomedical uses is achieved. A mechanical model is used to analyze the behavior of pump diaphragm and chamber geometry. Pump chamber with 20mm diameter is used due to its moderate elasticity. Then, 5 pumps with different depth of pump chamber have been made. The maximum flow rate, 5.7g/min, is reached by using a 0.5mm pump chamber with a 200V actuated voltage.

Origin of the alternate bright/dark contrast in HREM images of hexagonal crystals, particularly 6H-SiC

1993 ◽  
Vol 51 ◽  
pp. 914-915
Author(s):  
J.S. Bow ◽  
R.W. Carpenter ◽  
M.J. Kim
Keyword(s):  
High Resolution ◽  
Incident Beam ◽  
Hexagonal Crystal ◽  
Detailed Explanation ◽  
Similar Character ◽  
High Resolution Images ◽  
The Difference ◽  
Zigzag Shape ◽  
Hexagonal Crystals ◽  
Dark Contrast

A prominent characteristic of high-resolution images of 6H-SiC viewed from [110] is a zigzag shape with a period of 6 layers as shown in Fig.1. Sometimes the contrast is same through the 6 layers of (0006) planes (Fig.1a), but in most cases it appears as in Fig.1b -- alternate bright/dark contrast among every three (0006) planes. Alternate bright/dark contrast is most common for the thicker specimens. The SAD patterns of these two types of image are almost same, and there is no indication that the difference results from compositional ordering. O’Keefe et al. concluded this type of alternate contrast was due to crystal tilt in thick parts of the specimen. However, no detailed explanation was given. Images of similar character from Ti3Al, which is also a hexagonal crystal, were reported by Howe et al. Howe attributed the bright/dark contrast among alternate (0002) Ti3Al planes to phase shifts produced by incident beam tilt.

Influence of the magnetic domain structure in the mass sensitivity of magnetoelastic sensors with different geometries

2021 ◽  
Vol 863 ◽  
pp. 158555
Author(s):  
Paula G. Saiz ◽  
Jose M. Porro ◽  
Andoni Lasheras ◽  
Roberto Fernández de Luis ◽  
Iban Quintana ◽  
...  
Keyword(s):  
Domain Structure ◽  
Magnetic Domain ◽  
Magnetic Domain Structure ◽  
Mass Sensitivity ◽  
Magnetoelastic Sensors
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