1070 Aluminum Disk

Al 1070 Aluminum Disk is a high-purity 1xxx series aluminum disk with a minimum aluminum content of 99.7%, offering a defined planar geometry with consistent surface area and thickness for electrochemical, surface science, and optical applications requiring higher purity than standard commercial grades. With electrical conductivity of ~59–61% IACS and thermal conductivity of ~226 W/m·K, 1070 achieves measurably higher conductivity than 1050 or 1200 — a consequence of the lower total iron and silicon content that reduces solid-solution electron scattering in the aluminum matrix. The naturally passivating Al₂O₃ layer is thinner and more chemically uniform at this purity level, providing a more consistent starting surface for anodization, electrochemical measurement, and surface-sensitive spectroscopic studies. Al 1070 disks are used as working electrodes in electrochemical cells requiring a higher-purity aluminum surface, as anodization blanks for high-quality oxide coatings where surface defect density must be minimized, and as corrosion and immersion test coupons in studies where trace element composition is a controlled experimental variable. The fixed disk geometry supports reproducible sample preparation for thermal diffusivity measurements, recrystallization studies, and microstructural characterization of near-pure aluminum. Research on the electrical conductivity of 1xxx series alloys has used 1070 as an intermediate reference point between commercial-grade 1050 and laboratory-grade 1199.