Alumina-based spherical low-expansion artificial sand "HS Ball"
H (Hard: Hard) S (Strong: Strong) BALL! High thermal conductivity.
The "HS Ball" is a low-expansion artificial sand made of alumina with high fire resistance (SK37 or higher) and low thermal expansion rate. The chemical composition of the general characteristics (representative values) is 68.4% Al2O3, 23.9% SiO2, and 3.3% Fe2O3, with a bulk density of 1.8 for loose filling and 1.9 for dense filling. It is characterized by its round shape and smooth particle surface (no irregularities), as well as high thermal conductivity and hardness (old Mohs hardness: 8.5, Vickers hardness: 1400 HV0.5). 【Product Examples】 ■ #10-20: 1.180mm to 0.600mm ■ #20-30: 0.850mm to 0.425mm ■ #140-200: 0.150mm and above ■ #200-300: 0.106mm and above *For more details, please download the PDF or feel free to contact us.
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