Energy & Green Tech
Zinc-air batteries are an inexpensive, powerful battery alternative that can be used on a small scale to power electronics or on a large scale for electric vehicles or energy storage. These batteries work when oxygen from ...
Feb 27, 2024
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4
Engineering
A research team, jointly led by Professor Seok Ju Kang and Professor Hyun-Wook Lee in the School of Energy and Chemical Engineering at UNIST, has successfully developed a novel binder technology that promises to revolutionize ...
Dec 14, 2023
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3
Electronics & Semiconductors
Transparent conductors are essential for many devices, such as touch screens and solar cells. Copper iodide (CuI) can conduct electricity while staying see-through but is not as good as some other materials. Researchers from ...
Nov 2, 2023
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44
Engineering
PVC window frames rely on a metal scaffold for stability. But what if another strong material with lower heat conductivity was used in place of the metal? This would improve the overall thermal insulation of the window and ...
Oct 12, 2023
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1
Electronics & Semiconductors
Imagine a stretchable and durable sensor patch for monitoring the rehabilitation of patients with elbow or knee injuries, or an unbreakable and reliable wearable device that measures a runner's cardiac activities during training ...
Oct 2, 2023
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87
Energy & Green Tech
According to a study published in Renewables, a research team led by Prof. Hu Linhua from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences has improved the performance of metal ion batteries by ...
Jul 28, 2023
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1
Engineering
The research team led by Professor Jong-Sung Yu of the Department of Energy Science and Engineering at DGIST has developed a low-temperature method to synthesize a highly graphitized carbon support that will greatly improve ...
Mar 31, 2023
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42
Energy & Green Tech
In times when energy is scarce and sustainable ways of energy production are being explored, thermoelectric materials are being considered for power generation to transform waste heat into electricity. However, to make this ...
Mar 9, 2023
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35
Electronics & Semiconductors
Korea Institute of Machinery & Materials (KIMM) has announced the development of the design and process technology for the world's first battery electrode that significantly improves the performance and stability of batteries ...
Jan 27, 2023
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8
Engineering
Due to its zero carbon, safe storage, and high energy density, liquid ammonia is a promising marine fuel in the shipping industry.
May 6, 2022
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22
Electrical conductivity or specific conductance is a measure of a material's ability to conduct an electric current. When an electrical potential difference is placed across a conductor, its movable charges flow, giving rise to an electric current. The conductivity σ is defined as the ratio of the current density to the electric field strength :
It is also possible to have materials in which the conductivity is anisotropic, in which case σ is a 3×3 matrix (or more technically a rank-2 tensor) which is generally symmetric.
Conductivity is the reciprocal (inverse) of electrical resistivity, ρ, and has the SI units of siemens per metre (S·m-1):
Electrical conductivity is commonly represented by the Greek letter σ, but κ (esp. in electrical engineering science) or γ are also occasionally used.
An EC meter is normally used to measure conductivity in a solution.
This text uses material from Wikipedia, licensed under CC BY-SA
