CERAMIC SPHERICAL BODY

• Main Authors: KAMII YASUHIRO, MITSUNO AKINORI, SHINKAI MASAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 07.10.2021
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; LIME, MAGNESIA; METALLURGY; MILLING GRAIN; PERFORMING OPERATIONS; PREPARATORY TREATMENT OF GRAIN FOR MILLING; REFRACTORIES; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE

To provide a ceramic spherical body such as a ball and a bead used in a mill such as a vibration mill and a sand mill that is excellent in crushing efficiency for a target of crushing/dispersing, ability in providing high dispersibility, and washability after use.SOLUTION: A ceramic spherical body has a ratio of tetragonalness of 80% or higher and lower than 95% and a surface roughness Sa of 20 nm or less. The specific surface area A obtained when nitrogen gas is used as an adsorbate and the specific surface area B obtained when steam is used as an adsorbate in specific surface area measurement using a BET method satisfy (B/A)×100≥10(%).SELECTED DRAWING: None 【課題】振動ミル、サンドミル等の粉砕機に用いられるボール、ビーズ等のセラミックス球形体において、粉砕・分散対象の粉砕効率、分散性付与に優れ、使用後の洗浄性にも優れたものを提供する。【解決手段】正方晶の割合が８０％以上、９５％未満であり、表面粗さＳａが２０ｎｍ以下であり、ＢＥＴ法による比表面積測定において、窒素ガスを吸着質としたときの比表面積Ａと水蒸気を吸着質としたときの比表面積Ｂとが、（Ｂ／Ａ）×１００≧１０（％）を満足することを特徴とするセラミックス球形体。【選択図】なし