99.99γ-Al₂O₃ High-purity Ultrafine Powder
99.99γ-Al2O3 is odorless, tasteless and white powder. It is unstable crystal, and turns into θ-Al2O3 when the temperature is 1000℃ and stable α-Al2O3 when 1180℃. It is transparent or semitransparent, and its primary diameter is 6～10nm. The specific surface area is large (BET, 100～400m2/g) and surface chemistry is highly active.
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