Quartz crystal twinning under mechanical stress: experimental measurements

2002 ◽  
Author(s):  
J.J. Boy ◽  
P.L. Guzzo
Keyword(s):  
Mechanical Stress ◽  
Quartz Crystal ◽  
Experimental Measurements ◽  
Crystal Twinning

scholarly journals The Influence of Mechanical-stress on the Quartz Filter Features

2018 ◽  
pp. 1-6
Author(s):  
Gao Ao ◽  
Xia Gang ◽  
Kong Yong
Keyword(s):  
Mechanical Stress ◽  
Transmission Spectrum ◽  
Quartz Crystal ◽  
Experimental System ◽  
Center Wavelength ◽  
Quartz Filter ◽  
Filter Output ◽  
Set Up ◽  
The Relationship ◽  
Correct Design

In order to study the effect of mechanical-stress on the quartz filter output, based on the elasto-optical effect of quartz crystal, the relationship between berifringent difference of quratz plate and mechanical-stress is deduced, the experimental system is set up by using Ultra-6600 UV spectrophotometer, and received the transmission spectrum of Lyot quartz birefringence filter, the transmission spectrum was investigated theoretically and experimentally in detail. The results show that when applied different mechanical stresses, the center wavelength of quartz birefringent filter changed, and the drifting direction of the center wavelength is related to the size of applied mechanical stress, the drifting size of the center wavelength is related to the direction of applied mechanical stress. It is helpful for the manufacturing, correct design and application of quartz birefringence filter.

scholarly journals Useful Piezoelectric Sensor to Detect False Liquor in Samples with Different Degrees of Adulteration

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Luis Armando Carvajal Ahumada ◽  
Andrés Felipe Sandoval Cruz ◽  
Mario Alejandro García Fox ◽  
Oscar Leonardo Herrera Sandoval
Keyword(s):  
Quartz Crystal ◽  
Piezoelectric Sensor ◽  
Experimental Measurements ◽  
Quartz Crystal Resonator ◽  
Current Strategy ◽  
Crystal Resonator

The main objective of this article is to demonstrate by experimental measurements the capability of the quartz crystal resonator (QCR) to characterize samples of liquor at different concentrations of adulteration with methanol, classify them according to their viscosity, and identify how to use this capability as a potential detection of fake liquor. According to the literature, the fake liquor is a common problem detected in several countries across the globe. The current strategy to detect the fake liquor is based on a piezoelectric biosensor that permits the classification of the samples according to its viscosity. The viscosity is a useful variable to determinate the degree of adulteration in the liquor samples because the viscosity value between ethanol (straight liquor) and methanol (most common fake liquor) is very different.

Unusual electromechanical response in rubrene single crystals

2018 ◽  
Vol 5 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Micaela Matta ◽  
Marco José Pereira ◽  
Sai Manoj Gali ◽  
Damien Thuau ◽  
Yoann Olivier ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Single Crystals ◽  
Strong Coupling ◽  
Multiscale Modeling ◽  
Experimental Measurements

Multiscale modeling and experimental measurements highlight the strong coupling between mechanical stress and mobility along the two in-plane orthogonal crystalline directions in rubrene FETs.

Hole Formation in Gold Films

1972 ◽  
Vol 30 ◽  
pp. 510-511
Author(s):  
R. W. Vook ◽  
R. Cook ◽  
R. Ziemer
Keyword(s):  
Deposition Rate ◽  
Quartz Crystal ◽  
Evaporation Rate ◽  
Gold Films ◽  
Hole Density ◽  
Hole Formation ◽  
Microscope Slide ◽  
Crystal Film ◽  
Glass Microscope Slide ◽  
Glass Microscope

During recent experiments on Au films, a qualitative correlation between hole formation and deposition rate was observed. These early studies were concerned with films 80 to 1000A thick deposited on glass at -185°C and annealed at 170°C. In the present studies this earlier work was made quantitative. Deposition rates varying between 5 and 700 A/min were used. The effects of deposition rate on hole density for two films 300 and 700A thick were investigated.Au was evaporated from an outgassed W filament located 10 cm from a glass microscope slide substrate and a quartz crystal film thickness monitor. A shutter separating the filament from the substrate and monitor made it possible to obtain a constant evaporation rate before initiating deposition. The pressure was reduced to less than 1 x 10-6 torr prior to cooling the substrate with liquid nitrogen. The substrate was cooled in 15 minutes during which the pressure continued to drop to the mid 10-7 torr range, where deposition was begun.

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