scholarly journals Probing material conductivity in two-terminal devices by resistance difference

2017 ◽  
Vol 111 (8) ◽  
pp. 083501 ◽  
Author(s):  
Yang Lu ◽  
I-Wei Chen
Keyword(s):  
Resistance Difference

Proliferation and resistance difference of a liver-parasitized myxosporean in two different gynogenetic clones of gibel carp

2014 ◽  
Vol 113 (4) ◽  
pp. 1331-1341 ◽  
Author(s):  
Yan-Hua Zhai ◽  
Li Zhou ◽  
Yang Wang ◽  
Zhong-Wei Wang ◽  
Zhi Li ◽  
...  
Keyword(s):  
Gibel Carp ◽  
Resistance Difference

The Dependence of Aluminum/Tungsten Reaction on Crystalline Phases of Cvd Tungsten

1990 ◽  
Vol 181 ◽  
Author(s):  
Y. Harada ◽  
H. Onoda ◽  
S. Madokoro
Keyword(s):  
Sheet Resistance ◽  
Alloy Film ◽  
Crystalline Phases ◽  
Si Substrates ◽  
Tungsten Hexafluoride ◽  
Cu Alloy ◽  
Grain Structures ◽  
The Difference ◽  
Deposition Conditions ◽  
Resistance Difference

ABSTRACTThe reaction between Al and CVD-W films has been studied. Al/α-W/Si and Al/β-W/Si structures were prepared by deposition on different Si substrates by changing deposition conditions using silane reduction of tungsten hexafluoride, followed by Al-Si-Cu alloy film sputter deposition. The sheet resistance of Al/α-W/Si structure is higher than that of Al/β-W/Si structure after 500°C annealing. RBS measurements show that the W diffusion into Al occurs in both structures after annealing, and the reaction between α-W and Al takes place easily compared with that between β-W and Al. This causes the sheet resistance difference. The activation energies for the W diffusion into Al, however, are almost the same in both structures. When CVD-W films are exposed to air after removal from the reactor, the sheet resistance of β-W film increases according to the exposure time, while that of α-W film does not. AES measurements indicate that the β-W film absorbs more oxygen than the α-W because of the difference of grain structures. The resistance increase of β-W film is caused by the oxygen that is absorbed from air. Our results indicate that the oxygen in the β-W layer suppresses the W diffusion into Al. Once the reaction begins, however, the diffusion into Al does not depend on crystalline phases of CVD-W.

scholarly journals Analysis of Thin Film Fire Sensors

1984 ◽  
Vol 11 (3) ◽  
pp. 209-214
Author(s):  
G. Zentai ◽  
Zs. Illyefalvi-Vitéz
Keyword(s):  
Thin Film ◽  
Time Constant ◽  
Small Volume ◽  
Temperature Sensitive ◽  
Thin Glass ◽  
Time Constants ◽  
Industrial Buildings ◽  
The Difference ◽  
Two Temperature ◽  
Resistance Difference

The detection of fire in mines, industrial buildings, ships etc. is an important problem from both the economical and life-protecting aspects. The fire could be detected in several ways, e.g. by the measurement of flame-radiation, heat, pressure, temperature, the aerosols, the gases etc.The Department of Electronic Technology has developed a fire sensor which detects the rate of the increase of temperature. The fire sensor consists of two temperature sensitive resistors with different time-constants. If the increase of temperature in consequence of the fire is fast, the difference between the resistance of the temperature sensors is high, while a slow change in temperature causes only small differences. By connecting the temperature sensitive sensors into a bridge, the resistance difference can be easily detected.The temperature sensitive resistors are realized by thin film technology using platinum or nickel film on a thin glass or ceramic substrate. Because of the large surface and small volume of the resistor, its time-constant originally is very low but the time-constant could be easily increased by increasing the volume of the resistor. The present paper gives a detailed description of the analysis and the measurement of the temperature sensitive resistors with different time-constants. The technology of the films is also discussed.

Electrical transport properties of AlAs under compression: reversible boundary effect

2015 ◽  
Vol 17 (39) ◽  
pp. 26277-26282 ◽  
Author(s):  
Jiejuan Yan ◽  
Feng Ke ◽  
Cailong Liu ◽  
Qinglin Wang ◽  
Junkai Zhang ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Transport Properties ◽  
Electrical Transport ◽  
Boundary Effect ◽  
Electrical Transport Properties ◽  
Grain Boundary Effect ◽  
Resistance Difference

The grain boundary effect can be modulated by compression and plays positive roles on performance of devices such as increasing the resistance difference between two states.

scholarly journals The relationship between surface treatments and corrosion resistance of hot-dip galvanized steel

2014 ◽  
Vol 20 (3) ◽  
pp. 165-170 ◽  
Author(s):  
Amirreza Bakhtiari
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behaviour ◽  
Salt Spray ◽  
Surface Treatments ◽  
Galvanized Steel ◽  
Tafel Polarization ◽  
Galvanized Coatings ◽  
The Relationship ◽  
Scanning Electron ◽  
Resistance Difference

In this work three surface treatments such as: polishing, sand-blast and polishedoxidized have been carried out on the hot-dip galvanized coatings. The roughness and corrosion resistance of coatings have been studied. Surface morphology of coatings has evaluated by scanning electron microscope (SEM). Corrosion behavior was analyzed by salt spray cabinet test and Tafel extrapolation test. The results showed that the sample under sand-blasted treatment exhibited the highest roughness number. Tafel polarization and salt spray cabinet tests reveal the sample with great roughness number have weak corrosion resistance. Difference observed in corrosion behaviour can be explained by difference in surface roughness.

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