MAGNETIC FLUID

• Main Author: AWANO HIROMOTO
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

PROBLEM TO BE SOLVED: To provide a magnetic fluid having a higher thermal conductivity when a magnetic field is applied thereto.SOLUTION: A magnetic fluid contains magnetic particles in a solvent. Each of the magnetic particles has a core-shell structure, and the core is made of nickel or iron while the shell is made of copper. When a magnetic field is applied to the magnetic fluid and the magnetic particles in the magnetic contact with one another, a heat conduction path between these magnetic particles is sufficiently secured by copper of high thermal conductivity which is coated on nickel or iron particles. As a result, the magnetic fluid is capable of having a higher thermal conductivity.SELECTED DRAWING: Figure 5 【課題】磁場を印加したとき、一層高い熱伝導性を有する磁性流体を提供する。【解決手段】溶媒中に磁性粒子を含有し、前記磁性粒子がコア−シェル構造を有し、前記コアがニッケル又は鉄であり、かつ、前記シェルが銅である、磁性流体。この磁性流体に磁場を印加して、磁性流体中の磁性粒子同士が接触すると、ニッケル又は鉄粒子に被覆された高熱伝導の銅によって、これらの磁性粒子間で充分に熱伝導経路が確保される。その結果、磁性流体が一層高い熱伝導率を有することができる。【選択図】図５