IRON OXIDE PARTICLES

• Main Authors: KAMIKOORIYAMA YOUICHI, TOYOSHIMA AKIHIRO, OZAKI HIDEKI, FUKUSATO SHUN
• Format: Patent
• Language: English; Japanese
• Published: 11.04.2023
• Subjects: CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; INORGANIC CHEMISTRY; METALLURGY

To provide iron oxide particles with high dispersibility and high packing ability of particles.SOLUTION: Iron oxide particles of the present invention have an average primary particle size of 50 nm or more and an average aspect ratio of 1.50 or more. It is preferable that the iron oxide particles of the present invention contain ε-Fe2O3 as the main constituent. The iron oxide particles of the present invention are also preferably columnar particles. The iron oxide particles of the present invention also preferably have an average circularity of 0.80 or less. The iron oxide particles of the present invention also preferably have an average major diameter of 60 nm or more.SELECTED DRAWING: Figure 1 【課題】粒子の分散性が高く、且つ充填性が高い酸化鉄粒子を提供すること。【解決手段】本発明の酸化鉄粒子は、平均一次粒径が５０ｎｍ以上であり、且つ平均アスペクト比が１．５０以上である。本発明の酸化鉄粒子は、主たる構成成分としてε－Ｆｅ２Ｏ３を含むことも好適である。本発明の酸化鉄粒子は、柱状の粒子であることも好適である。本発明の酸化鉄粒子は、平均円形度が０．８０以下であることも好適である。本発明の酸化鉄粒子は、平均長径が６０ｎｍ以上であることも好適である。【選択図】図１