Parameters of Pure, Doped and Reduced Ceria

Lattice Parameters of Pure, Doped and Reduced Ceria 

This section describes relations between lattice parameter, temperature, substituent cation radius, solubility limit of a substituent oxide and x (degree of reduction). 

The lattice parameter at room temperature is 0.541134 nm. A reasonable agreement between the results of measured thermal expansion of pure stoichiometric Ce02 up to 1000°C is found, and my conclusion is that the linear thermal expansion coefficient (TEC) is  

A doped ceria will have a slightly different TEC dependent on the ion radius and charge (oxidation state) of the dopant cation. Larger radius and lower charge than Ce will increase the TEC and vice versa. 

For a simple solid solution the lattice parameter usually follow Vegard s rule with good approximation, i.e. a linear relationship exists between lattice parameter and the concentration of the solute. The slope of this straight line is termed Vegard s slope. Kim published an empirical relation between ionic radius of the metal ion of oxides (dopants) dissolved in ceria (and other fluorite structured oxides) 

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Lattice Parameters of Pure, Doped and Reduced Ceria 15.3. Electrical Conductivity ... 

Lattice parameters of pure, doped and reduced ceria... 

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