conductivity resistivity Articles

The fundamental conductivity and resistivity of water

Pure water has a very low. but not quite zero, electrical conductivity. This conductivity provides a probe into fundamental properties of water, including the electrochemical mobility of the hydrogen and hydroxide ions. Deviation from this value is a measure of trace ionic impurities. Ultrapure water (UPW). with impurities at or below the sub-parts-per-billion range, is used extensively in many ...

Jan. 1, 2005

By SnowPure Water Technologies

Development of Pd-coated ceramic electrodes in hybrid sulphur cycle

The Hybrid Sulphur (HyS) cycle has attracted much attention as a mass production process for hydrogen. It consists of an electrolysis step and a thermal decomposition one. In order to achieve high efficiency for hydrogen production and operational cost reduction, some developments in electrode materials with high corrosion resistance, high electrical conductivity and low anodic potential is a key ...

Mar. 16, 2009

By Inderscience Publishers

FRP cooling tower vs stainless steel cooling tower

FRP, is Fiber-reinforced plastic, it composites by glass fiber and resin. It material feature is light, hard, non-conductive, corrosion-resistant. When FRP products are largely used it along with the waste problem. There will be a question how to solve the waste FRP. Traditional cooling tower is made of FRP. There will be a question how to solve the waste cooling tower. Understand the disposal ...

Feb. 25, 2020

By JIN HUI COOLING MACHINE CO., LTD.

Ion-Pair Conductivity Theory V: Critical Ion Size and Range of Ion-Pair Existence

There are two mechanisms by which ion size affects conductivity of liquids: hydrodynamic resistance, and electrostatic attraction between cation and anion that leads to the formation of ion-pairs. Increasing ion size reduces conductivity due to growing hydrodynamic resistance. On the other hand, increasing ion size reduces the probability of ion-pairs formation, which leads to higher ionic ...

Nov. 1, 2018

By Dispersion Technology Inc.

Constructal entransy dissipation minimisation for 'volume-point' heat conduction without the premise of optimised last-order construct

In the 'volume-point' heat conduction problem with a steady heat source, entransy dissipation reflects the mean temperature difference. By taking entransy dissipation as an optimisation objective, the high effective-conduction channel distribution has been optimised based on rectangular element, without the premise of an optimised last-order construct. A more optimal construct and the limit of ...

Sep. 1, 2010

By Inderscience Publishers

Methods for Removing Signal Noise from Helicopter Electromagnetic Survey Data

A geophysical analysis was conducted over the abandoned T&T subsurface mines and portions of the Muddy and Roaring Creek watersheds in northeastern Preston County, West Virginia. The data were collected using helicopter-borne measurements of frequency-domain electromagnetic (FDEM) conductivity (390, 1555, 6254, 25,800, and 102,680 Hz). Noise was a significant issue in the lowest frequency EM ...

Mar. 1, 2004

By Springer-Verlag GmbH

Inheritance characteristics of brown patch resistance in tall fescue

Brown patch disease, caused by Rhizoctonia solani Kühn, is one of the most devastating fungal pathogens that occur on tall fescue [Lolium arundinaceum (Schreb.) Darbysh. = Schedonorus arundinaceus (Schreb.) Dumort]. The development of genetic resistance to brown patch would provide the most effective long term control to this disease; however, the genetic mechanism of brown patch resistance in ...

Oct. 22, 2009

By Soil Science Society of America (SSSA)

Conductivity Theory and Measurement

Electrical conductivity is a measure of the ability of a solution to cany* a current. Current flow in liquids differs from mat in metal conductors in that electrons cannot flow freely, but must be carried by ions. Ions are formed when a solid such as salt is dissolved in a liquid to form electrical components having opposite electrical charges. For example, sodium chloride separates to form Na" ...

Jan. 1, 2005

By IC Controls Ltd.

High Thermal Conductive Silicon Pad

High thermal conductive silicone pad is a high thermal conductivity material. The raw material is made of Japan Electrochemical High Thermal Conductive Spherical Alumina Powder and Dow Corning Polymer. It is a cost-effective thermal gap filling material. The surface's natural micro-viscosity and softness can well fill the air gaps to transfer the heat between the heat source and the heat sink to ...

Aug. 4, 2019

By Shenzhen Union Tenda Technology Co., Ltd.

Brief Instruction of Copper Clad Steel Stranded Wire

The copper-clad strand wire is shaped like a cable ccs, which is made of a plurality of copper-clad single wires. Because of its multi-stranded properties, the electrical conductivity and tensile strength are relatively good, and the product can be customized to enhance the elongation rate by multiple heat treatment in the production process, which has increased the strength and toughness of the ...

Aug. 26, 2019

By Ningbo Zhenhai Beisuda Petrochemcial Equipment Co.,Ltd

CCS-Stranded Cable

Brief Instruction of Copper Clad Steel Stranded Wire The copper-clad strand wire is shaped like a cable, which is made of a plurality of copper-clad single wires. Because of its multi-stranded properties, the electrical conductivity and tensile strength are relatively good, and the product can be customized to enhance the elongation rate by multiple heat treatment in the production process, which ...

Sep. 25, 2019

By Ningbo Zhenhai Beisuda Petrochemcial Equipment Co.,Ltd

What Gas Diffusion Layer (GDL) do I use for a Hydrogen Generator (Electrolyzer)?

We've spoken already about Gas Diffusion Layer (GDL) selection for a Fuel Cell; today we will cover some GDL considerations for Electrolyzers. The Hydrogen side (Cathode) of an Electrolyzer (EZ) can be almost any gas diffusion layer GDL (or even no GDL) that you would like and that fits your own mechanical design. This can be common GDL materials like Toray Paper, Sigracet, Freudenberg, AvCarb, ...

Jul. 24, 2012

By Fuel Cells Etc

COPPER-CLAD STEEL GROUNDING CONDUCTORS

Copper clad steel grounding conductor is a new material developed by Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd. to replace pure copper. Copper-clad copperweld steel copper clad rod has the following advantages: With high strength With low price High corrosion resistance High electrical conductivity of copper APPLICATIONS OF CCS GROUNDING GROUND CONDUCTORS In recent years, the copper ...

Aug. 26, 2019

By Ningbo Zhenhai Beisuda Petrochemcial Equipment Co.,Ltd

Gold Fingers PCB

Among the large-scale use of PCI and optical modules and cable sockets, the gold fingers PCB has been divided into: long and short gold fingers, broken gold fingers, split gold fingers, gold finger plates in the process of processing, need to pull gold-plated wire, conventional gold finger processing is relatively simple, the length of the circuit board fingers require strict control of the gold ...

Sep. 20, 2019

By Shenzhen Huihe Circuits Co.,Ltd.

CCS-Stranded Cable

Brief Instruction of Copper Clad Steel Stranded Wire The copper-clad strand wire is shaped like a cable, which is made of a plurality of copper-clad single wires. Because of its multi-stranded properties, the electrical conductivity and tensile strength are relatively good, and the cable copperweld can be customized to enhance the elongation rate by multiple heat treatment in the production ...

Oct. 15, 2019

By Ningbo Zhenhai Beisuda Petrochemcial Equipment Co.,Ltd

The State of Carbon Fiber for Thermal Dissipation in LEDs

Light emitting diodes (LEDs) require efficient heat sinks in order to operate consistently. In an attempt to remedy concerns surrounding the efficiency of such components and to create a solid foundation for high-powered LED variants, manufacturers have been exploring new materials with exceptional thermal dissipating properties. Specifically, researchers have veered away from metals (copper ...

Apr. 7, 2016

By Larson Electronics LLC

Diamond Wire Drawing Die Blanks

The pcd wire drawing die blanks are produced under ultra-high temperature and ultra-high pressure. It consists of diamond powder and metal catalyst (Cobalt). It features high wear resistance, hardness and thermal conductivity, high mechanical strength, and tenacity. Diamond die blanks are mainly for drawing a wide range of wire such as copper, aluminum, nickel, stainless steel etc. As one of the ...

Oct. 25, 2019

By Henan E-Grind Abrasives Co., Ltd.

Conductivity Measurement in high purity water samples below 10 microsiems/cm

High Purity Water Resistivity/ Conductivity Measurement Ultra-Pure Water without any chemical impurities will still have a conductivity because of the presence of H* and OH" ions due to the self-ionization of water. Ultra-pure water has a conductivity of 0.055 HSiemens'cm or a resistivity of 18.18 mQ-cm at 25 °C. In order to know the conductivity or resistivity of ultra-pure water it is ...

Jan. 1, 2012

By IC Controls Ltd.

Grounding Conductor

Copper-clad copperweld steel grounding material is a new material developed by Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd. to replace pure copper. Copper clad ground wire has the following advantages: With high strength With low price High corrosion resistance High electrical conductivity of copper GROUNDING GROUND CONDUCTORS In recent years, the copper clad steel rod has been ...

Sep. 29, 2019

By Ningbo Zhenhai Beisuda Petrochemcial Equipment Co.,Ltd

General Mapping Case Study

This is a collection of various cases where the 2D resistivity imaging method pioneered by Advanced Geosciences Inc have been successfully applied. Click on a section below and you will be shown a full 2D resistivity imaging brochure detailing the case in question. Acknowledgement: These cases have been submitted by satisfied customers whom we thank for permission to publish their data on the ...

Apr. 8, 2014

By Advanced Geosciences, Inc.