Initial experimental results on the operating modes and electrical conductivity in an r.f. plasma flow device

1966 ◽  
Author(s):  
L. BOEDEKER ◽  
C. HALDEMAN
Keyword(s):  
Electrical Conductivity ◽  
Plasma Flow ◽  
Experimental Results ◽  
Operating Modes ◽  
Flow Device

scholarly journals The effect of additives metal on the D.C conductivity of epoxy resin

2011 ◽  
Vol 8 (1) ◽  
pp. 168-174
Author(s):  
Baghdad Science Journal
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Epoxy Resin ◽  
Filler Content ◽  
Experimental Results ◽  
Filler Concentration ◽  
Effect Of Additives

The present studies are focused on the modification of the properties of epoxy resin with different additives namely aluminum, copper by preparing of composites systems with percentage (20%, 40% and 50%) of the above additives. The experimental results show that the D.C of conductivity on wt% filler content at ( 293-413 ) K electrical conductivity of all above composites increased with temperature for composites with filler contact and find the excellent electrical conductivity of copper and lie between (2.6*10-10 - 2.1*10-10)?.cm . The activation energy of the electrical conductivity is determined and found to decrease with increasing the filler concentration.

Design and Fabrication of Micro Oxygen Sensor

2011 ◽  
Vol 483 ◽  
pp. 237-242
Author(s):  
Chia Yen Lee ◽  
Long Kai Lin Liou ◽  
Chin Lung Chang ◽  
Chang Hsing Tai ◽  
Lung Ming Fu
Keyword(s):  
Thin Film ◽  
Electrical Conductivity ◽  
Gas Sensor ◽  
Oxygen Sensor ◽  
Rf Sputtering ◽  
Experimental Results ◽  
Surface Pattern ◽  
Working Temperature ◽  
Measured Resistance ◽  
Sensing Performance

In the study, a MEMS-based gas sensor is presented, which consists of a sensing thin film deposited by RF sputtering and annealed at 375°C. The structure and surface pattern of the thin film are analyzed by XRD and SEM. The sensor consists of a substrate, Pt interdigitated electrodes and an SnO2 sensing layer. As concentration of oxygen changes, a change in the electrical conductivity of the SnO2 film is caused. The experimental results show that the measured resistance increases as the concentration of oxygen increases at a working temperature of 300°C. A good oxygen sensing performance is presented in the study.

Effect of Electrical Pulse Ageing on Microstructure and Properties of Cu-2.5Fe-0.03P-0.1Zn Copper Alloy

2005 ◽  
Vol 475-479 ◽  
pp. 2635-2638
Author(s):  
Jin Liang Huang ◽  
Qiang Li ◽  
Ping Liu ◽  
Qi Ming Dong
Keyword(s):  
Electrical Conductivity ◽  
Theoretical Analysis ◽  
Copper Alloy ◽  
High Density ◽  
Experimental Results ◽  
Electrical Pulse ◽  
Lead Frame ◽  
Microstructure And Properties ◽  
Nano Size ◽  
The Ideal

Milisecond high density electrical pulse was used to age one of the typical IC lead frame materials Cu-2.5Fe-0.03P-0.1Zn copper alloy. The effects of electrical pulse aging on the microstructures, electrical conductivity and microhardness of this alloy were systematically investigated. The experimental results shown that the alloy phase precipitated in Cu-2.5Fe-0.03P-0.1Zn copper alloy during electrical pulse aging could be controlled to the order of nano-size and the ideal match of electrical conductivity and microhardness could be achieved in the condition of optimized parameters of electrical pulse. The electrical conductivity of the alloy was kept at above 60%IACS while the microhardness reached to HV115. A preliminary theoretical analysis was made to explain the unique action of electrical pulse.

scholarly journals Preparation and Study of some Electrical Properties of PVA-Ni(NO3)2 Composites

2014 ◽  
Vol 40 ◽  
pp. 36-42 ◽  
Author(s):  
Sabah A. Salman ◽  
Nabeel A. Bakr ◽  
Mohammed H. Mahmood
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Filler Content ◽  
Experimental Results ◽  
Casting Technique ◽  
Different Temperatures

The aim of this paper is to prepare and study the (D.C.) electrical conductivity of (PVA-Ni (NO3)2) composites at different temperatures. For that purpose, PVA films with Ni (NO3)2 salt additive were prepared with different concentrations‎ 2, 4, 6, 8 and 10 wt. % and with thickness of 45μm by using casting technique. The experimental results for PVA-Ni (NO3)2) ‎films show that the (D.C.) electrical‏ ‏conductivity increased with increasing ‎the filler content and the‏ ‏temperature, and the activation energy was ‎decreased with increasing the filler content‎.

scholarly journals The electrical and mechanical properties of Cadmium chloride reinforced PVA:PVP blend films

2020 ◽  
Vol 12 ◽  
pp. 120006
Author(s):  
Rana S. Mahmood ◽  
Sabah A. Salman ◽  
Nabeel Ali Bakr
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Polymer Blend ◽  
Weight Ratio ◽  
Experimental Results ◽  
Casting Method ◽  
Ac Electrical Conductivity ◽  
Elongation At Break ◽  
Blend Films ◽  
Reinforced Polymer

In this study, pure polymer blend (PVA:PVP) film and salt (CdCl2·H2O) reinforced polymer blend films were prepared at different weight ratios (10 wt%, 20 wt%, 40 wt%) using the casting method. The effect of the salt weight ratio on the dielectric properties of the polymer blend films reinforced by CdCl2·H2O salt were investigated, and the experimental results showed that the dielectric constant and the dielectric loss factor decreased as the frequency increased for all polymer blend films. Moreover, the above-mentioned properties increased with increasing salt weight ratios at the same frequency. The experimental results also showed an increase in AC electrical conductivity with increasing frequency, for all polymer blend films, and the AC electrical conductivity also increased with an increase in the weight ratio of the salt at the same frequency. The effect of the salt weight ratio on the mechanical properties of the salt-reinforced PVA:PVP polymer blend films was also studied. The experimental results obtained from the tensile test of the salt-reinforced polymer blend films show significant change in the values of tensile strength, elongation at break, and Young’s modulus with increasing salt weight ratios; the hardness value first increases then decreases with increasing salt weight ratios, and the fracture energy value increases with increasing salt weight ratios, thus they could be good candidates for hard adhesives with low flexibility.

scholarly journals Modelling and testing of optimum soil moisture levels in the corrosion of underground pipelines

2019 ◽  
Vol 92 ◽  
pp. 16002 ◽  
Author(s):  
Rukshan Azoor ◽  
Ravin Deo ◽  
Jayantha Kodikara
Keyword(s):  
Electrical Conductivity ◽  
Finite Element ◽  
Soil Moisture ◽  
Corrosion Rate ◽  
Moisture Content ◽  
Finite Element Model ◽  
Corrosion Behaviour ◽  
Element Model ◽  
Transport Processes ◽  
Experimental Results

Corrosion is one of the major factors leading to the failure of buried pipelines. Soil properties such as aeration, moisture content and level of compaction are known to cause variations in the level of corrosion of buried metallic structures. It is known that, at a particular soil moisture content, the corrosion rate reaches a maximum value. While this phenomenon is generally understood, an explanation from a soil mechanics perspective with mechanisms for soil water continuity and mass transport processes is currently lacking. This work fills this void by modelling the moisture-controlled diffusion transport and electrical conductivity in soil coupled to the electrochemical activity on the buried metal surface. Variations in the electrical conductivity and oxygen diffusion in sand at different degrees of saturation were determined experimentally. The results were used as input parameters in a finite element model. Results from the coupled finite element model were compared with experimental results from electrochemical corrosion tests. The tests were conducted on cast iron specimen buried in sand and the corrosion behaviour under various aeration regimes were studied. The presence of an optimum moisture/aeration regime, where the corrosion rate becomes a maximum was demonstrated and the mechanisms behind this phenomenological behaviour are discussed in this paper. The modelling and experimental results are expected to be useful in developing non-intrusive testing methods for underground corrosion.

scholarly journals A Review on Electrical Conductivity of Nanoparticle-Enhanced Fluids

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1592 ◽  
Author(s):  
Alina Adriana Minea
Keyword(s):  
Electrical Conductivity ◽  
Double Layer ◽  
Electric Double Layer ◽  
Research Work ◽  
Electrical Characterization ◽  
Experimental Results ◽  
The Stability

This review discusses exclusively the recent research on electrical conductivity of nanofluids, correlations and mechanisms and aims to make an important step to fully understand the nanofluids behavior. Research on nanoparticle-enhanced fluids’ electrical conductivity is at its beginning at this moment and the augmentation mechanisms are not fully understood. Basically, the mechanisms for increasing the electrical conductivity are described as electric double layer influence and increased particles’ conductance. Another idea that has resulted from this review is that the stability of nanofluids can be described with the help of electrical conductivity tests, but more coordinated research is needed. The purpose of this article is not only to describe the aforementioned studies, but also to fully understand nanofluids’ behavior, and to assess and relate several experimental results on electrical conductivity. Concluding, this analysis has shown that a lot of research work is needed in the field of nanofluids’ electrical characterization and specific applications.

The Effect of the Fe2+B/Fe3+B Ratio on Electric Conductivity and Corrosion Resistance of Anodes

2017 ◽  
Vol 896 ◽  
pp. 72-77
Author(s):  
Han Bing He ◽  
Yuan Wang ◽  
Pei Yu Huang ◽  
Xu Peng Niu
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Electric Conductivity ◽  
Spinel Structure ◽  
Experimental Results ◽  
Trivalent Iron ◽  
Iron Ion ◽  
Inverse Spinel ◽  
Inverse Spinel Structure

The effect of the Fe2+B/Fe3+B ratio (the ratio of divalent and trivalent iron ion in B position of the inverse spinel structure) in cermets on the electric conductivity and corrosion resistance of anodes was investigated. The experimental results showed that both the electrical conductivity and corrosion resistance are proportional to the Fe2+B/Fe3+B ratio on the surface of anodes because FeAl2O4 and NiAl2O4 are produced on the surface of the anode and Fe3+ in the NiFe2O4 is corroded preferentially during electrolysis.

Notizen: Electrical Conduction in Thiantrene

1976 ◽  
Vol 31 (2) ◽  
pp. 285-286 ◽  
Author(s):  
S. Pietra ◽  
M. Finetti
Keyword(s):  
Electrical Conductivity ◽  
Electrical Conduction ◽  
Experimental Results ◽  
Hopping Mechanism

Electrical conductivity of thiantrene monocrystals was observed. The experimental results were interpreted as a “hopping” mechanism between the molecules of crystal.

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