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Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

285
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
285
Energy In A Magnetic Field01:24

Energy In A Magnetic Field

2.3K
If a magnetic field is sustained, there must be a current in a closed circuit or loop, implying some energy has been spent in creating the field. If this energy is not dissipated via the circuit's resistance, it is stored in the field.
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus...
2.3K
Design Example: Automobile Ignition System01:14

Design Example: Automobile Ignition System

231
The automobile's ignition system plays a vital role by ensuring the timely ignition of the fuel-air mixture in each cylinder. This ignition is facilitated by a spark plug, which is composed of two electrodes separated by an air gap. A spark forms across this air gap when a substantial voltage is generated between the electrodes, leading to the ignition of the fuel.
One can generate a large voltage using a car battery of 12 volts with the help of inductors. Inductors are known for opposing...
231
Energy Stored in Inductors01:16

Energy Stored in Inductors

388
An inductor is ingeniously crafted to accumulate energy within its magnetic field. This field is a direct result of the current that meanders through its coiled structure. When this current maintains a steady state, there is no detectable voltage across the inductor, prompting it to mimic the behavior of a short circuit when faced with direct current.
In terms of gauging the energy stored within an inductor, it is equivalent to the integral of the power delivered at every individual moment, all...
388
Diamagnetism01:26

Diamagnetism

2.4K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
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Magnetism01:30

Magnetism

6.3K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
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Updated: Jul 4, 2025

Preparation and Reactivity of Gasless Nanostructured Energetic Materials
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Preparation and Reactivity of Gasless Nanostructured Energetic Materials

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磁気調節点火による高エネルギー密度材料

James E Allen1, Sergey V Zybin2, Sergey I Morozov3

  • 1Department of Chemistry, Temple University, 1901 N. 13th St. Philadelphia, Pennsylvania 19122, United States.

Journal of the American Chemical Society
|February 8, 2024
PubMed
まとめ

研究者は新しいエネルギー材料 マンガン-窒素のクラスターを開発しました その分解は磁場によって遅くなります この発見は磁気調節された最初の爆発物であり エネルギー物質科学の新たな道を開きます

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Preparation and Evaluation of Hybrid Composites of Chemical Fuel and Multi-walled Carbon Nanotubes in the Study of Thermopower Waves
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関連する実験動画

Last Updated: Jul 4, 2025

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Preparation and Evaluation of Hybrid Composites of Chemical Fuel and Multi-walled Carbon Nanotubes in the Study of Thermopower Waves
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科学分野:

  • 無機化学
  • 材料科学
  • 物理化学

背景:

  • エネルギー密度の高いエネルギー材料は様々な用途に不可欠です.
  • エネルギー物質の分解を制御することは 重要な課題です
  • エネルギーに富んだ素材のデザインに ユニークな特性を備えています

研究 の 目的:

  • 高エネルギー密度の新型物質を合成する
  • この材料の分解に対する磁気配列の影響を調査する.
  • 磁場による分解の遅延の予測を実験的に検証する.

主な方法:

  • Mn6N6の六角形のプリズマクラスターをプロトリシスで合成.
  • 分解経路を予測する量子力学に基づく分子動力学シミュレーション
  • 磁場下での点火開始温度に関する実験.

主要な成果:

  • Mn6N6クラスタの合成が成功し, Mn6(μ3-NTzBuMe) 6(ClO4) 6となった.
  • シミュレーションにより,Mn2+イオンの磁気配列が分解速度に影響することを予測した.
  • 実験結果は,0. 5Tの磁場が点火開始温度を+10. 4 ± 3. 9 °C増加させたことを確認した.

結論:

  • この研究は磁気調節式爆発物の 最初の例を示しています
  • 適用された磁場は,このエネルギー材料の分解の開始を大幅に遅らせることができます.
  • この発見は 外部磁場を通して エネルギー物質の振る舞いを制御する 新しい可能性を開きます