A study of the formation of CuAl₂O₄ from CuO and Al₂O₃ by solid state reaction at 1000°C and 950°C

Abstract

Abstract The formation of the spinel CuAl 2 O 4 from the oxides CuO and Al 2 O 3 has been studied at 1000 and 950°C in air by measuring the fraction reaction completed as a function of time. In the experiments the molar oxide ratios were CuO/Al 2 O 3 = 0.5, 1.0 and 2.0 and the grain size for CuO was 1–3 μ throughout while for Al 2 O 3 fractions of 40–60 μ, 71–100 μ and 100–125 μ, were used. The rate of reaction could be explained quite well assuming a three‐dimensional diffusion mechanism.