Calcium oxide diffusion coefficient

Ramachandran and Smith obtained satisfactory agreement with experimental results on the reduction of nickel oxide with carbon monoxide (pore opening case) by considering the product layer diffusion coefficient as an adjustable parameter. Similarly, the model predicted pore closure and reaction die-off for the reaction of calcium oxide with sulfur dioxide, where the molar volume of calcium sulfate product is about three times that of the calcium oxide reactant. [Pg.1155]

The self-diffusion coefficient of calcium in single crystals of calcium oxide was measured at 1465 to 1760C using vapor-deposited thin films of radioactive Ca O and boundary conditions for diffusion from a plane source into a semi-infinite medium. The temperature dependence of the diffusivity was expressed as ... [Pg.197]